Seller Profit Guard

How do you calculate marketplace price parity?

Last updated: 2026-08-09

Written and reviewed by Seller Profit Guard Editorial Team.

Hold the product, currency, common costs, and contribution target constant. For each channel, subtract the target share of verified funding from fixed costs, divide by one minus target margin and percentage costs, subtract buyer shipping, then reverse the seller discount. Reperform contribution before interpreting the price.

Declare product grain

Hold the product, currency, common costs, and contribution target constant. For each channel, subtract the target share of verified funding from fixed costs, divide by one minus target margin and percentage costs, subtract buyer shipping, then reverse the seller discount. Reperform contribution before interpreting the price. Keep target, fixed costs, percentage costs, funding, shipping, discount reversal, price, and decision in separate fields. Checkpoint 1 in the price parity formula ledger records product, market, currency, target, evidence dates, source version, owner, reviewer, prior price, and accepted formula before the result is interpreted.

For declare product grain, keep seller discount, buyer shipping, verified funding, marketplace rate, payment rate, creator commission, fixed charges, advertising, product cost, fulfillment, returns, target, conflict, backup, stop rule, and restoration as separate evidence fields.

Use invented or approved aggregate values only. Exclude buyer identities, emails, addresses, order rows, account IDs, payment details, bank records, credentials, private invoices, campaign identifiers, and raw exports from the public price parity formula ledger.

Set target margin

Hold the product, currency, common costs, and contribution target constant. For each channel, subtract the target share of verified funding from fixed costs, divide by one minus target margin and percentage costs, subtract buyer shipping, then reverse the seller discount. Reperform contribution before interpreting the price. Keep target, fixed costs, percentage costs, funding, shipping, discount reversal, price, and decision in separate fields. Checkpoint 2 in the price parity formula ledger records product, market, currency, target, evidence dates, source version, owner, reviewer, prior price, and accepted formula before the result is interpreted.

For set target margin, keep seller discount, buyer shipping, verified funding, marketplace rate, payment rate, creator commission, fixed charges, advertising, product cost, fulfillment, returns, target, conflict, backup, stop rule, and restoration as separate evidence fields.

Use invented or approved aggregate values only. Exclude buyer identities, emails, addresses, order rows, account IDs, payment details, bank records, credentials, private invoices, campaign identifiers, and raw exports from the public price parity formula ledger.

Build common costs

Hold the product, currency, common costs, and contribution target constant. For each channel, subtract the target share of verified funding from fixed costs, divide by one minus target margin and percentage costs, subtract buyer shipping, then reverse the seller discount. Reperform contribution before interpreting the price. Keep target, fixed costs, percentage costs, funding, shipping, discount reversal, price, and decision in separate fields. Checkpoint 3 in the price parity formula ledger records product, market, currency, target, evidence dates, source version, owner, reviewer, prior price, and accepted formula before the result is interpreted.

For build common costs, keep seller discount, buyer shipping, verified funding, marketplace rate, payment rate, creator commission, fixed charges, advertising, product cost, fulfillment, returns, target, conflict, backup, stop rule, and restoration as separate evidence fields.

Use invented or approved aggregate values only. Exclude buyer identities, emails, addresses, order rows, account IDs, payment details, bank records, credentials, private invoices, campaign identifiers, and raw exports from the public price parity formula ledger.

Build channel fixed costs

Hold the product, currency, common costs, and contribution target constant. For each channel, subtract the target share of verified funding from fixed costs, divide by one minus target margin and percentage costs, subtract buyer shipping, then reverse the seller discount. Reperform contribution before interpreting the price. Keep target, fixed costs, percentage costs, funding, shipping, discount reversal, price, and decision in separate fields. Checkpoint 4 in the price parity formula ledger records product, market, currency, target, evidence dates, source version, owner, reviewer, prior price, and accepted formula before the result is interpreted.

For build channel fixed costs, keep seller discount, buyer shipping, verified funding, marketplace rate, payment rate, creator commission, fixed charges, advertising, product cost, fulfillment, returns, target, conflict, backup, stop rule, and restoration as separate evidence fields.

Use invented or approved aggregate values only. Exclude buyer identities, emails, addresses, order rows, account IDs, payment details, bank records, credentials, private invoices, campaign identifiers, and raw exports from the public price parity formula ledger.

Combine percentage costs

Hold the product, currency, common costs, and contribution target constant. For each channel, subtract the target share of verified funding from fixed costs, divide by one minus target margin and percentage costs, subtract buyer shipping, then reverse the seller discount. Reperform contribution before interpreting the price. Keep target, fixed costs, percentage costs, funding, shipping, discount reversal, price, and decision in separate fields. Checkpoint 5 in the price parity formula ledger records product, market, currency, target, evidence dates, source version, owner, reviewer, prior price, and accepted formula before the result is interpreted.

For combine percentage costs, keep seller discount, buyer shipping, verified funding, marketplace rate, payment rate, creator commission, fixed charges, advertising, product cost, fulfillment, returns, target, conflict, backup, stop rule, and restoration as separate evidence fields.

Use invented or approved aggregate values only. Exclude buyer identities, emails, addresses, order rows, account IDs, payment details, bank records, credentials, private invoices, campaign identifiers, and raw exports from the public price parity formula ledger.

Verify funding

Hold the product, currency, common costs, and contribution target constant. For each channel, subtract the target share of verified funding from fixed costs, divide by one minus target margin and percentage costs, subtract buyer shipping, then reverse the seller discount. Reperform contribution before interpreting the price. Keep target, fixed costs, percentage costs, funding, shipping, discount reversal, price, and decision in separate fields. Checkpoint 6 in the price parity formula ledger records product, market, currency, target, evidence dates, source version, owner, reviewer, prior price, and accepted formula before the result is interpreted.

For verify funding, keep seller discount, buyer shipping, verified funding, marketplace rate, payment rate, creator commission, fixed charges, advertising, product cost, fulfillment, returns, target, conflict, backup, stop rule, and restoration as separate evidence fields.

Use invented or approved aggregate values only. Exclude buyer identities, emails, addresses, order rows, account IDs, payment details, bank records, credentials, private invoices, campaign identifiers, and raw exports from the public price parity formula ledger.

Solve charged revenue

Hold the product, currency, common costs, and contribution target constant. For each channel, subtract the target share of verified funding from fixed costs, divide by one minus target margin and percentage costs, subtract buyer shipping, then reverse the seller discount. Reperform contribution before interpreting the price. Keep target, fixed costs, percentage costs, funding, shipping, discount reversal, price, and decision in separate fields. Checkpoint 7 in the price parity formula ledger records product, market, currency, target, evidence dates, source version, owner, reviewer, prior price, and accepted formula before the result is interpreted.

For solve charged revenue, keep seller discount, buyer shipping, verified funding, marketplace rate, payment rate, creator commission, fixed charges, advertising, product cost, fulfillment, returns, target, conflict, backup, stop rule, and restoration as separate evidence fields.

Use invented or approved aggregate values only. Exclude buyer identities, emails, addresses, order rows, account IDs, payment details, bank records, credentials, private invoices, campaign identifiers, and raw exports from the public price parity formula ledger.

Subtract buyer shipping

Hold the product, currency, common costs, and contribution target constant. For each channel, subtract the target share of verified funding from fixed costs, divide by one minus target margin and percentage costs, subtract buyer shipping, then reverse the seller discount. Reperform contribution before interpreting the price. Keep target, fixed costs, percentage costs, funding, shipping, discount reversal, price, and decision in separate fields. Checkpoint 8 in the price parity formula ledger records product, market, currency, target, evidence dates, source version, owner, reviewer, prior price, and accepted formula before the result is interpreted.

For subtract buyer shipping, keep seller discount, buyer shipping, verified funding, marketplace rate, payment rate, creator commission, fixed charges, advertising, product cost, fulfillment, returns, target, conflict, backup, stop rule, and restoration as separate evidence fields.

Use invented or approved aggregate values only. Exclude buyer identities, emails, addresses, order rows, account IDs, payment details, bank records, credentials, private invoices, campaign identifiers, and raw exports from the public price parity formula ledger.

Reverse seller discount

Hold the product, currency, common costs, and contribution target constant. For each channel, subtract the target share of verified funding from fixed costs, divide by one minus target margin and percentage costs, subtract buyer shipping, then reverse the seller discount. Reperform contribution before interpreting the price. Keep target, fixed costs, percentage costs, funding, shipping, discount reversal, price, and decision in separate fields. Checkpoint 9 in the price parity formula ledger records product, market, currency, target, evidence dates, source version, owner, reviewer, prior price, and accepted formula before the result is interpreted.

For reverse seller discount, keep seller discount, buyer shipping, verified funding, marketplace rate, payment rate, creator commission, fixed charges, advertising, product cost, fulfillment, returns, target, conflict, backup, stop rule, and restoration as separate evidence fields.

Use invented or approved aggregate values only. Exclude buyer identities, emails, addresses, order rows, account IDs, payment details, bank records, credentials, private invoices, campaign identifiers, and raw exports from the public price parity formula ledger.

Reperform contribution

Hold the product, currency, common costs, and contribution target constant. For each channel, subtract the target share of verified funding from fixed costs, divide by one minus target margin and percentage costs, subtract buyer shipping, then reverse the seller discount. Reperform contribution before interpreting the price. Keep target, fixed costs, percentage costs, funding, shipping, discount reversal, price, and decision in separate fields. Checkpoint 10 in the price parity formula ledger records product, market, currency, target, evidence dates, source version, owner, reviewer, prior price, and accepted formula before the result is interpreted.

For reperform contribution, keep seller discount, buyer shipping, verified funding, marketplace rate, payment rate, creator commission, fixed charges, advertising, product cost, fulfillment, returns, target, conflict, backup, stop rule, and restoration as separate evidence fields.

Use invented or approved aggregate values only. Exclude buyer identities, emails, addresses, order rows, account IDs, payment details, bank records, credentials, private invoices, campaign identifiers, and raw exports from the public price parity formula ledger.

Declare product grain: verification test 1

Create one synthetic counterexample for declare product grain. Change a single target, cost, fee percentage, fixed charge, funding, shipping, discount, commission, advertising, return, or allocation field, retain the prior packet, and show the charged-revenue, after-discount revenue, required-list-price, contribution, margin, gap, and Block, Review, or Ready effect.

Reconcile the counterexample against current official definitions, applicable account or contract evidence, payment statements, funding and advertising reports, commission records, seller ledgers, a mature return cohort, target approval, owner, reviewer, protected baseline, stop trigger, and restored result.

Explain why the test does not prove customer willingness to pay, demand, conversion, competitor response, lifetime value, payout timing, tax, accounting income, or universal channel superiority.

Set target margin: verification test 2

Create one synthetic counterexample for set target margin. Change a single target, cost, fee percentage, fixed charge, funding, shipping, discount, commission, advertising, return, or allocation field, retain the prior packet, and show the charged-revenue, after-discount revenue, required-list-price, contribution, margin, gap, and Block, Review, or Ready effect.

Reconcile the counterexample against current official definitions, applicable account or contract evidence, payment statements, funding and advertising reports, commission records, seller ledgers, a mature return cohort, target approval, owner, reviewer, protected baseline, stop trigger, and restored result.

Explain why the test does not prove customer willingness to pay, demand, conversion, competitor response, lifetime value, payout timing, tax, accounting income, or universal channel superiority.

Build common costs: verification test 3

Create one synthetic counterexample for build common costs. Change a single target, cost, fee percentage, fixed charge, funding, shipping, discount, commission, advertising, return, or allocation field, retain the prior packet, and show the charged-revenue, after-discount revenue, required-list-price, contribution, margin, gap, and Block, Review, or Ready effect.

Reconcile the counterexample against current official definitions, applicable account or contract evidence, payment statements, funding and advertising reports, commission records, seller ledgers, a mature return cohort, target approval, owner, reviewer, protected baseline, stop trigger, and restored result.

Explain why the test does not prove customer willingness to pay, demand, conversion, competitor response, lifetime value, payout timing, tax, accounting income, or universal channel superiority.

Build channel fixed costs: verification test 4

Create one synthetic counterexample for build channel fixed costs. Change a single target, cost, fee percentage, fixed charge, funding, shipping, discount, commission, advertising, return, or allocation field, retain the prior packet, and show the charged-revenue, after-discount revenue, required-list-price, contribution, margin, gap, and Block, Review, or Ready effect.

Reconcile the counterexample against current official definitions, applicable account or contract evidence, payment statements, funding and advertising reports, commission records, seller ledgers, a mature return cohort, target approval, owner, reviewer, protected baseline, stop trigger, and restored result.

Explain why the test does not prove customer willingness to pay, demand, conversion, competitor response, lifetime value, payout timing, tax, accounting income, or universal channel superiority.

Combine percentage costs: verification test 5

Create one synthetic counterexample for combine percentage costs. Change a single target, cost, fee percentage, fixed charge, funding, shipping, discount, commission, advertising, return, or allocation field, retain the prior packet, and show the charged-revenue, after-discount revenue, required-list-price, contribution, margin, gap, and Block, Review, or Ready effect.

Reconcile the counterexample against current official definitions, applicable account or contract evidence, payment statements, funding and advertising reports, commission records, seller ledgers, a mature return cohort, target approval, owner, reviewer, protected baseline, stop trigger, and restored result.

Explain why the test does not prove customer willingness to pay, demand, conversion, competitor response, lifetime value, payout timing, tax, accounting income, or universal channel superiority.

Verify funding: verification test 6

Create one synthetic counterexample for verify funding. Change a single target, cost, fee percentage, fixed charge, funding, shipping, discount, commission, advertising, return, or allocation field, retain the prior packet, and show the charged-revenue, after-discount revenue, required-list-price, contribution, margin, gap, and Block, Review, or Ready effect.

Reconcile the counterexample against current official definitions, applicable account or contract evidence, payment statements, funding and advertising reports, commission records, seller ledgers, a mature return cohort, target approval, owner, reviewer, protected baseline, stop trigger, and restored result.

Explain why the test does not prove customer willingness to pay, demand, conversion, competitor response, lifetime value, payout timing, tax, accounting income, or universal channel superiority.

Solve charged revenue: verification test 7

Create one synthetic counterexample for solve charged revenue. Change a single target, cost, fee percentage, fixed charge, funding, shipping, discount, commission, advertising, return, or allocation field, retain the prior packet, and show the charged-revenue, after-discount revenue, required-list-price, contribution, margin, gap, and Block, Review, or Ready effect.

Reconcile the counterexample against current official definitions, applicable account or contract evidence, payment statements, funding and advertising reports, commission records, seller ledgers, a mature return cohort, target approval, owner, reviewer, protected baseline, stop trigger, and restored result.

Explain why the test does not prove customer willingness to pay, demand, conversion, competitor response, lifetime value, payout timing, tax, accounting income, or universal channel superiority.

Subtract buyer shipping: verification test 8

Create one synthetic counterexample for subtract buyer shipping. Change a single target, cost, fee percentage, fixed charge, funding, shipping, discount, commission, advertising, return, or allocation field, retain the prior packet, and show the charged-revenue, after-discount revenue, required-list-price, contribution, margin, gap, and Block, Review, or Ready effect.

Reconcile the counterexample against current official definitions, applicable account or contract evidence, payment statements, funding and advertising reports, commission records, seller ledgers, a mature return cohort, target approval, owner, reviewer, protected baseline, stop trigger, and restored result.

Explain why the test does not prove customer willingness to pay, demand, conversion, competitor response, lifetime value, payout timing, tax, accounting income, or universal channel superiority.

Reverse seller discount: verification test 9

Create one synthetic counterexample for reverse seller discount. Change a single target, cost, fee percentage, fixed charge, funding, shipping, discount, commission, advertising, return, or allocation field, retain the prior packet, and show the charged-revenue, after-discount revenue, required-list-price, contribution, margin, gap, and Block, Review, or Ready effect.

Reconcile the counterexample against current official definitions, applicable account or contract evidence, payment statements, funding and advertising reports, commission records, seller ledgers, a mature return cohort, target approval, owner, reviewer, protected baseline, stop trigger, and restored result.

Explain why the test does not prove customer willingness to pay, demand, conversion, competitor response, lifetime value, payout timing, tax, accounting income, or universal channel superiority.

Reperform contribution: verification test 10

Create one synthetic counterexample for reperform contribution. Change a single target, cost, fee percentage, fixed charge, funding, shipping, discount, commission, advertising, return, or allocation field, retain the prior packet, and show the charged-revenue, after-discount revenue, required-list-price, contribution, margin, gap, and Block, Review, or Ready effect.

Reconcile the counterexample against current official definitions, applicable account or contract evidence, payment statements, funding and advertising reports, commission records, seller ledgers, a mature return cohort, target approval, owner, reviewer, protected baseline, stop trigger, and restored result.

Explain why the test does not prove customer willingness to pay, demand, conversion, competitor response, lifetime value, payout timing, tax, accounting income, or universal channel superiority.

Marketplace Price Parity Formula and Inputs: evidence exercise 1

Reperform declare product grain with invented Etsy, Shopify, and TikTok Shop pricing packets. Hold product, currency, common cost, return maturity, contribution target, and evidence dates constant within each pair, then isolate one declared channel difference.

Archive the accepted packet before varying that field. Explain the resulting denominator, required charged revenue, product revenue after discount, list price, modeled fees, contribution, target margin, required-price gap, decision, monitoring trigger, and restoration path.

The exercise remains educational and source-linked. It does not hardcode a universal rate, recommend a public price, approve an account change, or replace market-, category-, plan-, payment-, campaign-, contract-, tax-, accounting-, demand-, or competition-specific review.

Marketplace Price Parity Formula and Inputs: evidence exercise 2

Reperform set target margin with invented Etsy, Shopify, and TikTok Shop pricing packets. Hold product, currency, common cost, return maturity, contribution target, and evidence dates constant within each pair, then isolate one declared channel difference.

Archive the accepted packet before varying that field. Explain the resulting denominator, required charged revenue, product revenue after discount, list price, modeled fees, contribution, target margin, required-price gap, decision, monitoring trigger, and restoration path.

The exercise remains educational and source-linked. It does not hardcode a universal rate, recommend a public price, approve an account change, or replace market-, category-, plan-, payment-, campaign-, contract-, tax-, accounting-, demand-, or competition-specific review.

Marketplace Price Parity Formula and Inputs: evidence exercise 3

Reperform build common costs with invented Etsy, Shopify, and TikTok Shop pricing packets. Hold product, currency, common cost, return maturity, contribution target, and evidence dates constant within each pair, then isolate one declared channel difference.

Archive the accepted packet before varying that field. Explain the resulting denominator, required charged revenue, product revenue after discount, list price, modeled fees, contribution, target margin, required-price gap, decision, monitoring trigger, and restoration path.

The exercise remains educational and source-linked. It does not hardcode a universal rate, recommend a public price, approve an account change, or replace market-, category-, plan-, payment-, campaign-, contract-, tax-, accounting-, demand-, or competition-specific review.

Marketplace Price Parity Formula and Inputs: evidence exercise 4

Reperform build channel fixed costs with invented Etsy, Shopify, and TikTok Shop pricing packets. Hold product, currency, common cost, return maturity, contribution target, and evidence dates constant within each pair, then isolate one declared channel difference.

Archive the accepted packet before varying that field. Explain the resulting denominator, required charged revenue, product revenue after discount, list price, modeled fees, contribution, target margin, required-price gap, decision, monitoring trigger, and restoration path.

The exercise remains educational and source-linked. It does not hardcode a universal rate, recommend a public price, approve an account change, or replace market-, category-, plan-, payment-, campaign-, contract-, tax-, accounting-, demand-, or competition-specific review.

Marketplace Price Parity Formula and Inputs: evidence exercise 5

Reperform combine percentage costs with invented Etsy, Shopify, and TikTok Shop pricing packets. Hold product, currency, common cost, return maturity, contribution target, and evidence dates constant within each pair, then isolate one declared channel difference.

Archive the accepted packet before varying that field. Explain the resulting denominator, required charged revenue, product revenue after discount, list price, modeled fees, contribution, target margin, required-price gap, decision, monitoring trigger, and restoration path.

The exercise remains educational and source-linked. It does not hardcode a universal rate, recommend a public price, approve an account change, or replace market-, category-, plan-, payment-, campaign-, contract-, tax-, accounting-, demand-, or competition-specific review.

Marketplace Price Parity Formula and Inputs: evidence exercise 6

Reperform verify funding with invented Etsy, Shopify, and TikTok Shop pricing packets. Hold product, currency, common cost, return maturity, contribution target, and evidence dates constant within each pair, then isolate one declared channel difference.

Archive the accepted packet before varying that field. Explain the resulting denominator, required charged revenue, product revenue after discount, list price, modeled fees, contribution, target margin, required-price gap, decision, monitoring trigger, and restoration path.

The exercise remains educational and source-linked. It does not hardcode a universal rate, recommend a public price, approve an account change, or replace market-, category-, plan-, payment-, campaign-, contract-, tax-, accounting-, demand-, or competition-specific review.

Marketplace Price Parity Formula and Inputs: evidence exercise 7

Reperform solve charged revenue with invented Etsy, Shopify, and TikTok Shop pricing packets. Hold product, currency, common cost, return maturity, contribution target, and evidence dates constant within each pair, then isolate one declared channel difference.

Archive the accepted packet before varying that field. Explain the resulting denominator, required charged revenue, product revenue after discount, list price, modeled fees, contribution, target margin, required-price gap, decision, monitoring trigger, and restoration path.

The exercise remains educational and source-linked. It does not hardcode a universal rate, recommend a public price, approve an account change, or replace market-, category-, plan-, payment-, campaign-, contract-, tax-, accounting-, demand-, or competition-specific review.

Marketplace Price Parity Formula and Inputs: evidence exercise 8

Reperform subtract buyer shipping with invented Etsy, Shopify, and TikTok Shop pricing packets. Hold product, currency, common cost, return maturity, contribution target, and evidence dates constant within each pair, then isolate one declared channel difference.

Archive the accepted packet before varying that field. Explain the resulting denominator, required charged revenue, product revenue after discount, list price, modeled fees, contribution, target margin, required-price gap, decision, monitoring trigger, and restoration path.

The exercise remains educational and source-linked. It does not hardcode a universal rate, recommend a public price, approve an account change, or replace market-, category-, plan-, payment-, campaign-, contract-, tax-, accounting-, demand-, or competition-specific review.

Marketplace Price Parity Formula and Inputs: evidence exercise 9

Reperform reverse seller discount with invented Etsy, Shopify, and TikTok Shop pricing packets. Hold product, currency, common cost, return maturity, contribution target, and evidence dates constant within each pair, then isolate one declared channel difference.

Archive the accepted packet before varying that field. Explain the resulting denominator, required charged revenue, product revenue after discount, list price, modeled fees, contribution, target margin, required-price gap, decision, monitoring trigger, and restoration path.

The exercise remains educational and source-linked. It does not hardcode a universal rate, recommend a public price, approve an account change, or replace market-, category-, plan-, payment-, campaign-, contract-, tax-, accounting-, demand-, or competition-specific review.

Marketplace Price Parity Formula and Inputs: evidence exercise 10

Reperform reperform contribution with invented Etsy, Shopify, and TikTok Shop pricing packets. Hold product, currency, common cost, return maturity, contribution target, and evidence dates constant within each pair, then isolate one declared channel difference.

Archive the accepted packet before varying that field. Explain the resulting denominator, required charged revenue, product revenue after discount, list price, modeled fees, contribution, target margin, required-price gap, decision, monitoring trigger, and restoration path.

The exercise remains educational and source-linked. It does not hardcode a universal rate, recommend a public price, approve an account change, or replace market-, category-, plan-, payment-, campaign-, contract-, tax-, accounting-, demand-, or competition-specific review.

Derive the reverse-price equation without hiding funding

Start from contribution equals retained revenue minus common costs, marketplace fees, payment fees, creator commission, advertising, and allocated fixed costs. Retained revenue equals buyer charged revenue plus verified platform funding. When the percentage charges share the declared charged-revenue base, collect them into one variable rate and solve charged revenue algebraically instead of iterating rounded sticker prices.

The implemented equation is [fixed costs minus (one minus target margin) times verified funding] divided by [one minus target margin minus percentage costs]. Subtract buyer-paid shipping, then divide by one minus the seller-funded product discount to recover list price. This order prevents shipping, funding, and discount ownership from disappearing inside one unexplained net amount.

Reperform the solved packet at full precision. A reviewer should recover the target contribution margin after rebuilding retained revenue and each cost line. If the denominator is nonpositive, discount is at least 100%, required product revenue is nonpositive, or any required source is unresolved, the appropriate result is Block rather than an extreme price.

Separate fee bases before combining percentages

Etsy states that its transaction fee applies to item price plus buyer-paid shipping and gift wrap, while payment processing can also include applicable sales tax and varies by country. Shopify documents plan- and payment-path-dependent charges, and third-party transaction fees use a defined base that can include discounts, tax, and shipping. TikTok advertising and affiliate reports use their own Gross Revenue and commission definitions.

The simplified calculator combines percentage rates only after the operator confirms that the chosen values share the modeled charged-revenue base. If a source applies a rate to a different base, translate that cost to a per-retained-order fixed amount or use a separate packet. Never force unlike bases into the denominator merely to make the worksheet shorter.

Record base, rate, fixed component, market, plan, provider, category, attribution scope, source date, and owner. That evidence determines whether the algebra is valid; the public label of a fee does not.

Sources and further reading

• Etsy Help: fee basics: Official listing, transaction-fee base, and country-dependent payment-processing context.
• Etsy Help: seller fees and taxes: Official Etsy listing, transaction, payment, advertising, conversion, and regulatory fee categories.
• Shopify Help: types of charges: Official Shopify subscription, app, shipping, transaction, and billing-charge context.
• Shopify Help: Shopify Payments fees: Official plan-dependent payment-processing and third-party transaction-fee boundaries.
• Shopify Help: third-party providers: Official payment-provider configuration and third-party path context.
• Shopify Help: third-party transaction fees: Official provider, plan, refund, store-credit, shipping, tax, and fee-base context.
• TikTok Ads: Gross Revenue for Shop Ads: Official Gross Revenue bridge and Shop Ads ROAS definition.
• TikTok Ads: Shop Ads reporting: Official Shop Ads reporting and attribution context.
• TikTok Ads: affiliate creatives: Official affiliate authorization, commission, and Ads x Affiliate reporting context.
• Seller Profit Guard methodology: Evidence, privacy, deterministic calculation, review, correction, and restoration controls.

Related Seller Profit Guard tools

• Marketplace Price Parity Calculator: Reverse-solve two channel price pairs.
• Marketplace Fee Comparison Calculator: Compare contribution at already-entered prices.
• Product Price Floor Calculator: Solve one channel's contribution-aware floor.
• Etsy Fee Reference: Model editable Etsy fee assumptions.
• Methodology: Review evidence, privacy, calculation, release, correction, and restoration.
• Data Privacy: Protect seller, buyer, order, payment, account, bank, and raw export data.
• Etsy vs TikTok Shop Price Parity Example: Reperform an invented two-marketplace packet through required charged revenue, list prices, contribution target, gap, decision, and rollback.
• Marketplace vs Owned Store Price Parity: Compare an Etsy marketplace packet with a Shopify owned-store payment, advertising, fulfillment, return, plan, and app-cost packet.
• Marketplace Price Parity Mistakes: Diagnose target, denominator, discount, funding, fee-base, payment, commission, shipping, return, allocation, rounding, and interpretation errors.
• Marketplace Price Parity Data Sources: Map every target, cost, discount, funding, fee, payment, commission, shipping, ad, return, ownership, and restoration field.
• Marketplace Price Parity Decision Thresholds: Separate structural Block, price-gap Review, narrow Ready, market validation, override authority, stop rule, monitoring, and restoration.
• Compare Marketplace Price Parity Scenarios: Hold product economics constant while isolating marketplace, store, discount, funding, commission, advertising, payment, return, or allocation differences.
• Marketplace Price Parity Review Routine: Turn the calculator into a repeatable source-refresh, cost-close, target-review, price-test, exception, stop, monitoring, and rollback cadence.
• Interpret Marketplace Price Parity Results: Read required list price, charged revenue, contribution, margin, and gap without inferring demand, conversion, competition, payout, accounting, or tax.
• Marketplace Price Parity Audit Template: Preserve product scope, target, sources, rates, costs, formulas, prices, decision, owner, review, exception, backup, stop, and restoration.

Next step: Open Seller Profit Guard.

This is operational planning help, not tax, accounting, legal, financial, or platform-policy advice. Review the Terms and disclaimer, and verify current platform rules and fee assumptions before changing prices.