Tap "Pay in 3" at the Klarna checkout and, until this month, nobody asked whether you could actually afford the other two instalments. No credit check, no entry on your credit file, no regulator watching what happened if you missed one. That changes from 12 August 2026, when the Financial Conduct Authority's long-delayed Buy Now, Pay Later regime finally takes effect — five years after the Treasury first promised to bring the sector under proper oversight, and roughly eighteen months later than the industry itself expected. For the estimated 12 million UK adults who used a BNPL product in the past year, this is not a footnote. It is a genuine change to how deferred payment credit works, who can offer it, and what happens to your finances if things go wrong. Here is what actually shifts, and what doesn't.
Who counts as "BNPL" under the new rules
The FCA's definition catches the products you'd expect — Klarna's Pay in 3 and Pay in 30, Clearpay, PayPal's Pay in 3, and the newer instalment options built into checkout flows at Currys, ASOS and Next. It also catches a category most shoppers never think of as credit at all: interest-free instalment agreements offered directly by retailers through in-house finance arms, provided the agreement runs to 12 months or less and charges no interest.
What stays outside the perimeter
- Long-term retail finance with interest (store cards, 0% APR sofas over 24+ months) — already regulated under existing consumer credit rules
- Single-payment "pay in 30 days" invoicing used by some subscription services, where the FCA judged the harm profile too different to fold in at this stage
- Business-to-business trade credit, obviously
Clearpay's UK managing director told trade press in June that "the vast majority of our existing product sits inside scope" — which is a polite way of saying almost nothing about how Clearpay actually operates was designed with this line in mind.
Affordability checks arrive at checkout
This is the change shoppers will notice first. Lenders now have to run a genuine affordability assessment before approving a BNPL agreement — not necessarily a hard credit search every single time, but a real look at whether the repayment fits the person's circumstances, informed by data the lender already holds plus, increasingly, soft searches against credit reference agencies.
In practice this means the split-second approval many shoppers are used to gets a little less split-second. Klarna has said checks will typically add "a few seconds" rather than minutes, and for existing customers with a clean repayment history the assessment can run almost invisibly in the background. First-time users and anyone stacking several BNPL agreements across different providers at once are the ones who'll feel the friction — which is precisely the point, since serial stacking across three or four apps with nobody able to see the full picture has been the sector's best-documented harm.
Your credit file starts recording it
From this rollout, BNPL usage will begin appearing on statutory credit files held by Experian, Equifax and TransUnion — something that simply didn't happen before. A missed payment on a £45 Pay in 3 order could, for the first time, show up when a mortgage lender or car finance company pulls your file eighteen months later.
That's a real risk worth taking seriously, and it's also, on balance, the right trade-off. A payment method that never appears on your credit history creates an obvious blind spot for every other lender assessing you — banks have been flying blind on a chunk of applicants' actual debt load, and that opacity was never going to end well for anyone. Pay on time and the new visibility works in your favour, building a repayment history where previously there was none at all.
What happens when something goes wrong
Before 12 August, a dispute with a BNPL provider had nowhere formal to go beyond the company's own customer service team. Now, BNPL agreements fall under the Financial Ombudsman Service's remit, the same free, independent complaints route that already covers banks, mortgage lenders and credit card issuers.
Section 75 protection — the rule that makes your credit card provider jointly liable if a retailer goes bust or sells you something faulty over £100 — extends to regulated BNPL agreements too, provided the item costs more than £100 and less than £30,000. That's new. Previously, if a retailer went into administration mid-instalment-plan, BNPL customers had markedly weaker recourse than someone who'd paid on a credit card for the identical item.
The gap that remains
None of this touches the retailers' own promotional framing, and that's where the sharper edges of the sector still live. "Interest-free" remains technically true and functionally misleading when a missed payment triggers a late fee that, annualised, behaves an awful lot like interest. The FCA's rules require clearer pre-contract information about fees, but they don't cap late fees outright the way some campaigners wanted.
What to actually do about it
Treat every BNPL agreement as a real credit commitment from this point forward — because your credit file now will, whether or not you've mentally filed it that way. Before checkout, ask yourself whether you could cover the full amount today in one payment; if the honest answer is no, the deferred structure is masking a purchase you can't yet afford, not solving that problem. Consolidate where you can. Running four separate BNPL agreements across four different apps because each one feels small in isolation is exactly the pattern the new affordability checks are designed to catch, and it's exactly the pattern that wrecks a credit file fastest when two or three land in the same week. One clear ledger of what you owe and to whom beats four apps each showing a manageable-looking number. The providers that survive this transition well will be the ones that made affordability checks feel like protection rather than friction. The ones that fought it hardest in consultation responses are, unsurprisingly, the ones with the most to lose from shoppers actually seeing the full picture before they tap to pay.