RUNMU / CROSS-BORDER SELLER WORKSPACE

Shopify & TikTok return loss calculator

A Shopify and TikTok Shop return-loss calculator: model return shipping, repacking and restocking costs, profit after refunds, and advertising limits.

Free · No signup

Free reference FX · optional

Free reference exchange rates

Daily indicative rates, not executable bank or payout quotes. Manual inputs stay unchanged until you apply a rate.

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Rates By Exchange Rate API · 24-hour local cache. Failures keep manual inputs and any cached data.

Est. operating profit CNY—

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Build a product profit model

Start with your costs, then refine fees and refunds.

Product name / SKU

Rules / marketplace

List price / item USD

Expected orders orders

Product & operating costs

Product & inbound currency

Sourcing currency units per USD rate

Product cost / item CNY / USD

Inbound freight / item CNY / USD

Fulfillment / order USD

Ad spend / order USD

Overhead / batch USD

Revenue, discounts & buyer shipping

Seller-funded discount USD

Platform-funded discount USD

Buyer-paid shipping USD

Item revenue is list price minus your discount. The platform-funded discount replaces buyer payment; it is not extra revenue. Buyer item payment = list price − seller discount − platform discount.

Marketplace, creator & payment fees

Referral fee %

Minimum referral fee USD

Creator / affiliate commission %

Payment processing %

Fixed processing fee USD

Additional transaction fee %

Enter Amazon fulfillment costs from the official calculator. The TikTok US preset has no extra processing fee. Enter Shopify third-party transaction charges separately. Presets are not account quotes.

Refunds, retained fees & recovered stock

Full refund rate %

Seller-paid return shipping USD

Repacking cost / return USD

Restocking cost / return USD

Other return handling / return USD

Referral fee retained on refund %

Refund admin cap / SKU USD

Creator fee refunded %

Processing fees refunded %

Additional fee refunded %

Recovered inventory cost (not a fee) %

One item per order, full refunds only. US reference refund admin = min(original referral fee × 20%, $5) × refunded orders. Override for exemptions. Recovered stock reduces consumed COGS; it does not return purchase cash. Enter only seller-paid extra return shipping, repacking and restocking costs, without duplicating other handling costs. No customer restocking charge is assumed. Costs are per refunded order; use an average when some refunds do not involve a physical return.

Where expenses are paid & tax assumptions

Fulfillment payment

Advertising payment

Tax cost provision %

Customer tax in processing base %

Tax provision is an editable cost, not jurisdiction-specific tax accounting. Customer tax in the processing base increases only processing charges; it is not revenue.

FX & CNY outcome

Reference USD → CNY CNY

FX markdown %

Conversion / payout fee %

Fixed payout fee / batch USD

CNY sourcing costs stay fixed in CNY. USD operating expenses use reference FX. Inputs are planning assumptions.

ESTIMATED OPERATING PROFIT · CNY01

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Net margin—

Cost ROI—

Break-even list price—

Break-even ad spend / order—

Break-even ROAS · net sales—

Break-even creator commission—

Each limit changes one variable at a time. Do not apply every maximum simultaneously.

What do returns cost your margin?

Compare with the same order volume and no refunds. Ads and outbound shipping are already included.

From sales to profit

Goods & operationsPlatform & payoutProfit

Separate cash from profit

Recovered stock is inventory value, not cash received.

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