Who Gets Locked Out — And Why 'Affordability' Is a Black Box
The new affordability checks are mandatory, instant, and completely opaque. Each lender designs its own algorithm. There is no standardised model, no published criteria, and — crucially — no right of appeal for a declined transaction at point of sale.
Fair4All Finance estimates 10–30% of BNPL users will fail these checks. That's a range wide enough to drive a bus through: anywhere from 850,000 to 2.5 million people, depending on how conservative each lender's model turns out to be. Younger consumers and those with thin credit files are disproportionately affected — the very people BNPL was most useful for.
Here's the perversity: BNPL was popular partly because it didn't require the credit history that traditional lenders demand. An 18-year-old with a weekend job and no credit file could split a £60 purchase. A credit card would have declined them. Under the new rules, BNPL will decline them too. Where exactly are they supposed to go?
The FCA's position — that borrowers shouldn't access credit they "cannot realistically afford to repay" — sounds reasonable until you ask who decides what's realistic. If Klarna's algorithm says a £60 purchase over six weeks is unaffordable for someone earning £18,000 a year, Klarna's algorithm is making a moral judgment dressed as a mathematical one.
For the full list of what changed, see our breakdown of the new BNPL rules. The short version: FCA authorisation, Section 75 for purchases above £100, and mandatory affordability checks that each lender designs independently.
Under FCA consumer credit rules, authorised firms must assess creditworthiness before lending. The problem is that "creditworthiness" for a £60 purchase repaid over six weeks should not mean the same thing as it does for a £10,000 personal loan over five years. The FCA's one-size-fits-all approach ignores the difference.