Returns are the quiet tax on selling fashion online
Selling clothes online comes with a cost that rarely appears on a single line of the P&L: the return. And in fashion, that cost is unusually high. McKinsey research put the return rate for apparel on e-commerce channels at roughly 25%, against about 20% across all channels, and noted that a women's apparel seller can face return rates of up to 40% on categories like dresses and jeans. Compare that with the 8 to 10% typical of brick-and-mortar stores and the scale of the problem is clear.
If you sell dresses online, something close to one in three may come back. That is not an edge case. That is the model, unless you change something upstream.
The number behind the number
A return is never just a reversed sale. Figures published in the BoF and McKinsey State of Fashion 2023 put the average cost of a returned product between $21 and $46 once shipping, processing, and handling are included. And that range does not yet account for the items that come back unsellable at full price and have to be marked down.
Run the math on your own catalog. A brand shipping tens of thousands of orders a year at a 25% return rate is processing thousands of returns, each carrying that $21 to $46 tab, plus markdowns on whatever cannot go back to full price. This is the margin you thought you had. It leaves quietly, one reverse label at a time.
Returns are a retention problem, not just a cost problem
Here is why this matters more in 2026 than it did a few years ago. The BoF and McKinsey State of Fashion 2026 names customer retention as a defining priority for the year, with more than half of executives citing retention strategies as a key theme. In a slower-growth, value-conscious market, keeping a customer is worth more than chasing a new one.
Returns cut straight across that goal. A shopper who orders in good faith and receives something that does not fit does not just send it back. They lose a little confidence in the brand, and confidence is what repeat purchases are built on. McKinsey's own returns research makes the link explicit: better returns management can lower cost and improve customer loyalty at the same time. In other words, the returns pile and the retention target are the same problem viewed from two angles.
Most brands treat returns as weather, not as a problem to solve
For all that cost, returns remain strangely neglected. McKinsey found that managing returns is not among the top five priorities for about a third of retailers, and that a quarter do not manage them efficiently. Most attention goes to return policy and reverse logistics, how quickly and cheaply an item can be sent back and processed, rather than to the harder question of why it came back at all.
That focus is understandable but backwards. Optimizing the logistics of a return still leaves you paying for it. Preventing the return removes the cost entirely, and keeps the customer in a better mood while doing it.
The root cause is fit, and the fix starts before checkout
When brands do look at root causes, one dominates. Fit and size are consistently cited across industry research as the reason for more than half of all fashion returns. It makes sense: a shopper cannot try the garment on, so any uncertainty about how it will actually sit on their body is a return in waiting. A size chart tells them which number to pick, not whether the piece will suit them.
Notably, McKinsey's returns work points in the same direction as the fix. It highlights the value of recommending products matched to a shopper's individual size and style preferences, rather than leaving them to guess. That is the difference between a static size chart and a fit answer built for the person in front of it. For a deeper look at return rate benchmarks and reduction tactics, see our companion guide on fashion return rates.
What this means for your store
The data points to a clear order of operations for anyone serious about the cost of fashion returns.
Measure the real number. Track cost per return and return rate by category, not just a blended average. Dresses, denim, and swimwear behave very differently, and the biggest leaks are usually category-specific.
Attack the cause, not the symptom. A faster returns portal is useful, but it manages a cost you have already incurred. Preventing the fit mismatch removes it.
Recommend by fit, not by number. Give shoppers a clear answer on whether a piece will suit them before they buy, which is exactly what McKinsey's research suggests reduces both returns and lost loyalty.
None of this requires a wider size range or a more generous return policy. It requires closing the certainty gap before the order is placed. That is the layer SIXFIT adds: it reads 48 features on every product from your existing images, asks each shopper three to six simple questions, and gives a clear fit answer, so more of what sells actually stays sold. It installs on Shopify, and your first month is free.
Sources
Figures in this article are drawn from the following McKinsey and Business of Fashion research. Statistics have been paraphrased and attributed rather than reproduced verbatim.
- The State of Fashion 2026, Business of Fashion and McKinsey & Company (2025). Customer retention as a defining priority for 2026. Available at mckinsey.com/industries/retail/our-insights/state-of-fashion
- "Returning to order: Improving returns management for apparel companies," McKinsey & Company (2021). Apparel e-commerce return rate of about 25% versus roughly 20% overall; returns not among the top five priorities for about a third of retailers; better management can cut cost and improve loyalty. Available at mckinsey.com/industries/retail/our-insights/returning-to-order-improving-returns-management-for-apparel-companies
- "A path toward healthy, sustainable growth in e-commerce," McKinsey & Company (2021). Return rates of up to 40% on items such as dresses and jeans; e-commerce return rates reaching 25%. Available at mckinsey.com/industries/retail/our-insights/solving-the-paradox-of-growth-and-profitability-in-e-commerce
- The State of Fashion 2023, Business of Fashion and McKinsey & Company (2022). Average cost of a returned product between $21 and $46; US online return rate around 20.8%. Available at mckinsey.com/industries/retail/our-insights/state-of-fashion
Frequently asked questions
- What is the average return rate for fashion e-commerce?
- McKinsey research put the return rate for apparel on e-commerce channels at around 25%, compared with roughly 20% across all channels. The figure climbs much higher for specific categories: McKinsey notes that a women's apparel seller may see return rates of up to 40% on items such as dresses and jeans. Return rates for online orders are consistently far above the 8 to 10% typical of physical stores.
- How much does a single fashion return actually cost?
- According to figures published in the BoF and McKinsey State of Fashion 2023, retailers pay on average between $21 and $46 per returned product once shipping, processing, and other costs are counted. That is before accounting for items that cannot be resold at full price, which pushes the true cost higher on any return that comes back in imperfect condition.
- What is the main reason customers return clothing?
- Fit and size are consistently the leading drivers of apparel returns, cited across industry research as the cause of more than half of all fashion returns. Because a shopper cannot try the garment on before buying, any uncertainty about how it will fit becomes a return waiting to happen. McKinsey's own returns work points brands toward recommending products matched to a shopper's size and style preferences as part of the solution.
- Why do returns matter for customer retention in 2026?
- The BoF and McKinsey State of Fashion 2026 names customer retention as a defining priority, with more than half of executives citing retention strategies as a key theme for the year. Returns sit directly on that front line: a shopper who receives an ill-fitting item loses trust, and McKinsey's returns research notes that better returns management can reduce cost and improve customer loyalty at the same time.
- Are high return rates just the cost of doing business online?
- McKinsey argues they are not inevitable. Yet its research found that managing returns is not among the top five priorities for about a third of retailers, and a quarter do not manage them efficiently. Many focus on return policy and logistics rather than the root causes, which means a large share of returns are preventable but never prevented.