Definition
Refund and return rate is the share of orders (or revenue) that end up returned or refunded in a given period.
Also called: Return rate, Refund rate, Return Rate, Refund RateWhat share of orders is returned?
Change the inputs to see how numerator and denominator affect the result.
Why returns have to be in the equation
A return cancels the sale but still costs: shipping both ways, handling, possible loss of value, and payment fees that aren't always refunded. Leave the return rate out, and ROAS, contribution margin and CLTV all look better than they are, and the bidding optimizes toward a profit that partly gets sent back.
In some categories — fashion and footwear especially — the return rate can be double-digit and vary sharply by product and size. There it's not a detail, but one of the heaviest variable costs there is.
Returns as a margin and data lever
Treat expected returns as a variable cost in contribution margin (CM2), so break-even ROAS and the profit signal to the ad platforms reflect reality. If you can feed return-adjusted value back to Meta and Google, they bid on what actually stays sold — not on what was put in the cart.
The return rate itself can also be lowered: better size guides, more accurate product photos and descriptions, and catching patterns per product (specific items or sizes that get returned more often). Every percentage point less return is pure margin.
Frequently asked questions
Why do returns distort my ROAS?
Because ROAS measures the revenue attributed at purchase — not net of what's later sent back. At high return rates, ROAS therefore overstates the real value. Count returns as a variable cost in contribution margin.
How do I lower the return rate?
With better size guides, accurate photos and descriptions, and by analyzing which products and sizes get returned most, so the problems can be fixed at the source. Every avoided return is pure margin.
From insight to action
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About the author
Nicklas Segatz Mortensen
Growth hacker and fractional CMO with 10+ years' experience and hundreds of millions in managed ad spend behind him. Background from larger Danish and international scale-ups, and from the agency world.
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