Pricing High-Return Categories: The Math of Round-Trip Shipping
How much do round-trip shipping and repackaging cost you per return? Work out your real contribution profit.
October 16, 2026 · 5 min
How does the return rate eat into sales profit?
Say each sale books $45 of contribution profit, while one return costs $90 in shipping, repackaging and handling. That single return can create an extra loss equal to the contribution of two successful sales. Don't generalize it, though. The real figure depends on your shipping agreement, whether the product can be resold and commission refunds.
How to calculate expected unit contribution with returns
Expected contribution = (1 − R) × K − R × C. R is the return probability. K is the unit contribution of a completed order. C is the assumed extra operating and logistics loss when a return happens. State clearly what K and C include, and never deduct the same shipping fee twice.
Sample return cost table for a $300 product
| Contribution rate without returns | Profit without returns | 5% returns | 10% returns | 20% returns |
|---|---|---|---|---|
| 10% | $30 | $24 | $18 | $6 |
| 15% | $45 | $38.25 | $31.50 | $18 |
| 20% | $60 | $52.50 | $45 | $30 |
Assumption: C is a fixed $90 extra loss per return. Figures are illustrative. Tax, price-based commission and the product's condition after return can be added separately. A positive result means reduced contribution profit, not a loss.
What data to collect
- Realized sales and return quantities per SKU
- Round-trip shipping, repackaging and the cost of unsellable returns
- The platform's commission and coupon refund rules
- Return probability by category and period
Judge return cost and contribution profit against your realized return and logistics data. Read it alongside the break-even sales volume calculation.