Buy now pay later is now a normal part of how people shop. Around 42 percent of UK adults, roughly 22.6 million people, have used it, up from 36 percent two years earlier. More than 100 million BNPL transactions ran through 8.5 million UK customers in 2025, worth over 7 billion GBP. Globally it accounts for about 5 to 6 percent of online payment volume. If you sell to consumers, some share of your checkout is already going through it.
That is not the problem. The problem is that almost no DTC brand has ever run the maths on what it costs them, and the answer is rarely the one the provider put in the pitch deck. In a 2025 analysis of 2,500 ecommerce stores, 63 percent of merchants flagged BNPL fees as a serious threat to profitability. This is the breakdown of what it actually costs, the single test that decides whether it is worth it, and what changes now that the FCA regulates it.
What BNPL Costs Against What Cards Cost
Start with the rate card. Klarna publishes a range of roughly 3.29 to 5.99 percent plus a fixed fee per transaction, where the low end applies to Pay Now and the high end to instalments. Clearpay starts around 6 percent. High volume merchants doing 5 million and above annually can negotiate toward the bottom of the Klarna range, but the rack rate is where most brands sit and fees are not expected to compress much through 2026.
Your baseline is Shopify Payments at an average of about 2.33 percent, or Stripe at about 2.9 percent. So the real number is not the BNPL fee. It is the delta: 2 to 4 percentage points of additional cost on every order that routes through it. That sounds small because you are comparing it to revenue. Compare it to contribution margin and it stops sounding small.
Take an 80 GBP order at 35 percent COGS. Card processing costs you about 2.04 GBP. Clearpay at 6 percent plus 30p costs you 5.10 GBP. The delta is 3.06 GBP. Against 80 GBP of revenue that is 3.8 percent and easy to ignore. Against 12 GBP of contribution margin after shipping, fulfilment and paid acquisition, it is 25 percent of the profit on that order.
That is the whole argument in one paragraph. BNPL is priced as a percentage of revenue and paid out of contribution margin, and for most DTC brands those two numbers are separated by a factor of five or six. A cost that looks like a rounding error at the top of the P&L is a quarter of the profit at the bottom of it.
The Only Question That Decides It: Incrementality
Providers sell BNPL on AOV uplift. The public case studies claim 20 to 40 percent. Real operator data is more modest: roughly 8 to 15 percent higher order value on the BNPL transaction itself, and a 2 to 5 percent conversion improvement. Those are believable numbers and they are not nothing.
But they describe the transaction, not the business. The question is not whether BNPL orders are bigger than card orders. Of course they are, because people who choose to split a payment are self-selecting into larger baskets. The question is how many of those orders would not have happened at all if BNPL had not been on the page.
That share is your incremental volume. Everything else is cannibalised card volume, which means you are paying an extra 2 to 4 points to process revenue you already had. Most brands never split the two, so BNPL reports as a win in the payments dashboard while it drains the P&L.
The break-even you should be holding yourself to
A brand running roughly 50 percent gross margin that adds about 3.5 percentage points of processing cost per order needs around a 7 percent increase in genuinely incremental order volume just to stand still. Below that, BNPL is eroding margin while appearing to stimulate sales. That is the number to test against, and it is testable.
Turn BNPL off for a defined window, or geo-hold it in one market, and watch total orders rather than BNPL orders. If total volume and revenue hold flat while BNPL share goes to zero, you have your answer: the fee was buying you nothing. If total volume drops by more than your break-even threshold, BNPL is earning its keep and you should leave it on and stop worrying about it.
Three Costs That Never Appear In The Pitch
The headline rate is the part everyone negotiates. These three are the part that quietly widens the gap between the rate you agreed and the cost you actually carry.
01
Returns come back higher and the fee often does not come back at all
BNPL orders return at around 13 percent on average, above typical baselines, because removing the upfront payment increases impulse purchasing. That is a known trade for a known benefit. What is less known is that many providers keep all or part of the transaction fee when an order is refunded. So a returned BNPL order can cost you the fee, the inbound shipping, and the restocking labour against zero revenue. Get the fee refund policy in writing before you sign, and model your return rate on BNPL orders separately from the rest of the business.
02
Disputes did not go away, they moved
BNPL is often sold as reducing chargeback exposure because the customer repays the provider rather than you. That is partly true, and card network chargeback risk does fall. It is not full insulation. Disputes about product quality, delivery, and misrepresentation still route back to you, BNPL disputes rose 17 percent in 2024, and providers including Klarna and Affirm charge a dispute fee of around 15 dollars when a case resolves in the customer favour. Budget for it as a line rather than assuming it is someone else problem.
03
The customer you gain may not be the customer you want
Average lifetime value for BNPL customers broadly matches or slightly beats card customers across the market, so the cohort is not inherently worse. But the average hides the split. If your BNPL cohort is skewed toward one time, discount driven, impulse first orders and it is not converting into repeat purchase, you are paying a premium acquisition cost for your least valuable customers. Cut your repeat purchase rate and 90 day LTV by payment method. If BNPL buyers lag the rest of your base, the extra fee is not an acquisition investment, it is a leak.
What Changed On 15 July 2026
UK BNPL is now regulated by the FCA as deferred payment credit. That brings affordability and creditworthiness assessments, upfront disclosure requirements, formal complaints rights, access to the Financial Ombudsman Service, and Section 75 protection on eligible purchases over 100 GBP. In the US there is no equivalent federal position since the CFPB withdrew its 2024 interpretive rule, which leaves a state by state patchwork.
Three practical consequences for a UK DTC brand. First, expect more declines at checkout, because affordability checks now sit between a customer selecting BNPL and completing the order. If your conversion reporting treats BNPL selection as intent to purchase, that gap will widen and you need to see it.
Second, the bar on how you present BNPL in your own copy has risen. Product page badges, checkout messaging and paid social creative that frame instalments as a casual convenience now carry real risk. Third, you have a new dispute surface. Section 75 exposure on baskets above 100 GBP is a genuine reason to review your delivery and fulfilment reliability before it becomes a regulated complaint rather than an email.
How To Decide: A Threshold, Not A Switch
The framing most brands use is binary. On or off. That is the wrong shape for the decision, because BNPL earns its cost in some parts of your catalogue and destroys value in others. Treat it as a threshold.
Below roughly 60 GBP the case is weak. The fixed fee and the percentage together eat a large share of contribution margin, and splitting a 45 GBP basket into four payments changes almost nobody mind. Between 60 and 120 GBP it depends entirely on your gross margin: above 60 percent you can usually carry it, below 45 percent you generally cannot. Above 120 GBP, on bundles, starter kits, subscriptions paid annually and premium SKUs, BNPL does the job it was designed for and the instalment genuinely changes the decision.
So gate it. Most providers and Shopify let you restrict BNPL availability by basket value. Almost no brand uses that, which means they subsidise the payment method on exactly the orders where it does the least work. Set a minimum basket threshold, run it for a quarter, and compare contribution margin per order before and after.
Then price your providers properly rather than stacking them. Running three BNPL options at checkout does not add three lots of incremental demand, it splits the same demand three ways while you carry three integrations and three sets of terms. Pick the one with the best rate for your AOV band and your market, negotiate it annually against your volume, and check whether Shop Pay Instalments prices better than the third party options on your specific plan and market before you assume it does not.
What This Looks Like In Practice
A supplements brand I work with had BNPL on roughly 19 percent of orders at an AOV of 54 GBP. The payments line had never been reviewed since launch. Nobody in the business owned it, which is the normal situation rather than an unusual one. When we pulled the fee delta against their card rate and applied it to twelve months of BNPL volume, the number was larger than their entire monthly retention budget.
We gated BNPL above 70 GBP rather than removing it, which pushed it toward the bundles where the instalment actually changes the decision and off the single tub orders where it never did. We also cut repeat purchase rate by payment method and found the BNPL cohort was reordering meaningfully later than the card cohort, so we built a separate replenishment trigger for them rather than treating the base as one group.
Total order volume did not drop. Contribution margin per order moved up. The revenue line looked almost identical, which is exactly the point: the fee had been buying them revenue they already had.
Inside the system
How we build this for brands
Payment cost is invisible because it lives in a settlement report nobody opens. So we build the profit and cash flow dashboard from live Shopify and ad data, with processing cost broken out by payment method rather than buried in a single fees line, and a reporting agent that surfaces leakage weekly instead of at year end. When the BNPL delta crosses a threshold against contribution margin, it gets flagged with the number attached rather than waiting for someone to go looking.
Alongside that we cut repeat purchase rate and LTV by payment method, then build the lifecycle response in Klaviyo: separate replenishment and win back timing for cohorts that reorder on different clocks, so a slower cohort gets worked rather than written off. Part of this runs live for portfolio brands today; the full system is what we deploy when we take a brand on.
Margin Audit
Find Out What Your Payment Stack Is Costing You
I will pull your processing cost by payment method, work out the BNPL fee delta against your contribution margin, and test whether that volume is incremental or cannibalised. You get the number and the decision, not a deck.
Book Your AuditFrequently asked questions
How much does BNPL cost a merchant compared to card payments?
BNPL sits materially above card rates. Klarna publishes a range of roughly 3.29 to 5.99 percent plus a fixed fee per transaction, with the low end applying to Pay Now and the high end to instalments. Clearpay starts around 6 percent. Standard card processing on Shopify Payments averages about 2.33 percent and Stripe about 2.9 percent. BNPL typically adds 2 to 4 percentage points of cost to every order it touches, and that lands on contribution margin rather than on revenue.
Does BNPL actually increase average order value?
Vendor case studies claim 20 to 40 percent uplift. Real operator data is closer to 8 to 15 percent on the BNPL transaction itself, with a 2 to 5 percent conversion lift, and it applies to that transaction rather than site-wide. The number that matters is incremental AOV, meaning uplift on orders that would not have happened without BNPL. Most brands never separate the two, which is why BNPL looks better in a dashboard than in a P&L.
How do I work out whether BNPL is profitable for my brand?
Take the fee delta between BNPL and your card rate, multiply by BNPL order volume, and compare it to incremental gross profit from genuinely new orders. As a benchmark, a brand on roughly 50 percent gross margin carrying about 3.5 percentage points of extra processing cost needs around a 7 percent increase in order volume just to break even. If your BNPL share is mostly cannibalised card volume, the fee is a straight deduction from profit.
Do BNPL providers refund their fee when a customer returns an item?
Many do not. Several keep all or part of the transaction fee when an order is refunded, so a returned BNPL order can cost you the fee, the return shipping and the restocking labour with no revenue against it. This compounds because BNPL orders return at around 13 percent on average, above typical baselines, since removing the upfront payment increases impulse purchasing. Get the fee refund policy confirmed in writing before you sign.
What do the new UK BNPL rules mean for DTC brands?
From 15 July 2026 BNPL is regulated by the FCA as deferred payment credit, bringing affordability checks, upfront disclosure, complaints rights, Financial Ombudsman access and Section 75 protection on eligible purchases over 100 GBP. For merchants that means more declines between BNPL selection and order completion, a higher bar on how you present instalments in your own copy, and a dispute route that did not previously exist. Plan for approval friction rather than assuming everyone who selects BNPL converts.
Should a low AOV DTC brand offer BNPL at all?
Usually not on every order. Below roughly 60 GBP the fixed fee and the percentage rate together consume a large share of contribution margin while the benefit to the customer is small, since splitting a 45 GBP basket into four payments changes very little. BNPL earns its cost on higher ticket baskets, bundles and starter kits where the instalment genuinely changes the purchase decision. Gating BNPL above a basket threshold is a legitimate and underused lever.
About the author
Caner Veli is a DTC operator who has helped 350+ brands fix broken growth engines. He built Liquiproof from zero to 3,000+ global retailers in under 6 years. He now runs the same playbook, supported by AI systems he built himself, for DTC and CPG brands.