Buy Now Pay Later has gone from niche checkout option to default for a large slice of UK online retail in just a few years. Three names dominate the market: Klarna, Clearpay, and Zilch. They look similar at first — all three split your purchase into instalments and don't charge interest if you pay on time — but the small print differs in ways that matter, especially around credit reporting, late fees, and where you can actually use them.
This article breaks down the real-world differences across payment plans, fees, credit-score impact, retailer coverage, and FCA regulation so you can pick the one that fits how you shop. All three providers sit under the FCA's BNPL framework that came into force in 2025, so the baseline consumer protections are now broadly comparable — but the products themselves still have distinct strengths.
Quick overview
| Feature | Klarna | Clearpay | Zilch |
|---|---|---|---|
| Payment plans | Pay in 30, Pay in 3, longer-term financing | Pay in 4 over 6 weeks | Pay in 4 over 6 weeks, or Pay in 1 with 2% Rewards |
| Interest on Pay-in-N | None | None | None |
| Sign-up check | Soft credit check | Card pre-authorisation | Soft credit check |
| Late fee | Up to £5 (after 7 days) | £6 per missed payment, capped £36 or 25% of order | None |
| Where you can use it | Major UK retailers + in-app card | Mostly fashion / beauty / lifestyle | Anywhere Mastercard is accepted |
| Credit card funding | Yes | Yes | No (Zilch refuses) |
| FCA-regulated BNPL | Yes (from 2025) | Yes (from 2025) | Yes (from 2025) |
| Reports to credit agencies | Yes | Limited | Yes |
All three are FCA-regulated under the BNPL framework that came into force in 2025. That means standardised affordability checks at sign-up, the right to complain to the Financial Ombudsman, and structured credit-information sharing.
How each one works
Klarna
Klarna offers the widest range of payment plans of the three. The headline options are Pay in 30 (full amount due 30 days after the order, no interest), Pay in 3 (split into three monthly instalments, no interest), and longer-term financing plans of 6 to 36 months (interest may apply, advertised APR varies by retailer).
You can use Klarna at checkout on most UK e-commerce sites, or through the Klarna app — which issues a single-use card so you can effectively Klarna any retailer that accepts cards. The app is the most polished of the three, with delivery tracking, price-drop alerts, and a curated marketplace.
Clearpay
Clearpay (operated globally as Afterpay) keeps it simple: Pay in 4 equal instalments over six weeks, with the first 25% due at checkout and the rest taken every two weeks. It's interest-free if you pay on time. Clearpay does not offer longer-term financing — Pay in 4 is the only product.
Clearpay's UK retailer coverage leans heavily on fashion, beauty, and lifestyle brands. It's accepted at ASOS, JD Sports, Boohoo, Cult Beauty, Pretty Little Thing, Sephora UK, and many independents. It's far less common at general retailers like supermarkets or electronics stores.
Zilch
Zilch's mechanism is closest to Clearpay's — Pay in 4 instalments over six weeks, interest-free — but with a useful twist. Zilch issues a virtual Mastercard (and a physical card on request), so you can use it at any merchant that accepts Mastercard, online or in-store. You don't need the merchant to support Zilch directly.
Zilch also offers Pay in 1 — pay the full amount upfront and get 2% back in Zilch Rewards (in-app credit usable on future purchases). This is unusual for BNPL because it rewards you for not using the credit feature.
Fees and what happens if you miss a payment
This is where the three diverge most clearly.
- Klarna charges a £5 late fee on Pay-in-3 plans if a payment is more than 7 days overdue. Pay-in-30 missed payments accrue a small late fee up to a cap. Long-term financing plans charge interest at the advertised APR.
- Clearpay charges £6 per missed payment, capped at the lower of £36 or 25% of the order value. Clearpay also restricts your ability to make new orders while you have an outstanding missed payment.
- Zilch charges no late fees. If you miss a payment, Zilch pauses your account until you catch up and may report the late payment to credit reference agencies, but the cost to you in pounds is zero.
Winner: Zilch on fee structure. No-late-fee BNPL is rare.
Credit checks and credit-score impact
All three perform some form of check, and all three can affect your credit history under the FCA's 2025 rules.
- Klarna runs a soft credit check at sign-up and on individual purchases. Pay-in-3 and longer-term plans report repayment behaviour to credit reference agencies, which can help or hurt your score depending on how you use it. Pay-in-30 has started reporting too.
- Clearpay doesn't run a hard or soft credit check at sign-up. Instead it pre-authorises a small amount on your nominated card to verify the card is real and funded. Late payments are reported to credit reference agencies.
- Zilch runs a soft credit check at sign-up and reports usage to credit reference agencies. Used responsibly, repayments can help build a thin file.
If you're early in your credit history and want BNPL to help build a record, Klarna's longer plans report most fully. If you want the minimum credit-agency footprint on day one, Clearpay's card pre-auth is the lightest touch.
Winner: Tied. Different needs lead to different answers. None of the three is the obviously "safest" for your credit file — used responsibly all three are fine.
Where can you actually use each one?
- Klarna has by far the broadest UK merchant integration. You'll see it as a checkout option at most major UK retailers — H&M, JD Sports, Currys, Boots, Argos, Etsy, AO.com, Halfords, and thousands more. The Klarna app extends this further by letting you generate a one-time card for any other merchant.
- Clearpay is concentrated in fashion, beauty, and lifestyle. ASOS, JD Sports, Boohoo, The Hut Group brands, Cult Beauty, Sephora UK, and many independents. Much less common at general retailers.
- Zilch works anywhere Mastercard is accepted, because Zilch funds the purchase via its own virtual card. That includes Tesco, Amazon, eBay, your local takeaway, supermarket apps — anywhere card payments are accepted, online or in-store.
Winner: Zilch on raw flexibility. Klarna on integrations and in-app extras.
Sign-up bonuses
Of the three, Zilch is the only one with a consistent UK refer-a-friend programme.
- Klarna — no public refer-a-friend programme as of 2026. Occasional one-off promos on specific retailers.
- Clearpay — no public refer-a-friend programme.
- Zilch — £5 in Zilch Rewards each side when a friend signs up, completes ID verification, and is issued a Zilch card. Reward credits within 10 working days of approval. Active community-verified codes at /referrals/zilch.
The Zilch £5 isn't life-changing but it's effectively £5 of free spending if you were going to sign up anyway.
Who should choose which?
Choose Zilch if you:
- Want BNPL that works at any retailer, not just integrated ones
- Don't want to risk late fees on principle
- Want 2% Rewards back when you choose to pay upfront
Choose Klarna if you:
- Shop frequently at major UK retailers that already support Klarna at checkout
- Need longer-term financing (over six weeks) for bigger purchases
- Want price-drop alerts, delivery tracking, and the most polished BNPL app
Choose Clearpay if you:
- Shop mostly at fashion, beauty, or lifestyle brands that integrate it
- Prefer the lightest possible sign-up footprint (no credit check, just card pre-auth)
- Want the simplest Pay-in-4 model with no other plan variants
Final verdict
| Use case | Winner |
|---|---|
| Works at the most retailers | Zilch |
| Best app and integrations | Klarna |
| Lowest fee risk | Zilch |
| Longer-term plans available | Klarna |
| Lightest sign-up footprint | Clearpay |
| Rewards for paying upfront | Zilch |
| Fashion and beauty retailer coverage | Clearpay |
| Most credit-history impact (in either direction) | Klarna |
There's no single best. The three providers target slightly different shopping styles. The honest recommendation for most UK shoppers in 2026: keep Klarna for major-retailer checkouts, use Zilch for everywhere else (and the no-fee policy), and only bother with Clearpay if you regularly shop at the fashion brands it covers.
For more guides on UK money apps, browse /articles, or browse active referral codes for UK fintech services at /referrals/category/finance.
Frequently Asked Questions
Is Buy Now Pay Later regulated in the UK?
Yes. Since 2025, BNPL providers including Klarna, Clearpay, and Zilch are regulated by the Financial Conduct Authority (FCA). This means standardised affordability checks at sign-up, the right to complain to the Financial Ombudsman, and structured credit-information sharing across the industry.
Does Buy Now Pay Later affect my credit score?
It can, in both directions. All three providers now report some payment behaviour to credit reference agencies under FCA rules. On-time repayments can help your score over time. Missed payments will hurt it. Just opening an account doesn't usually move the needle either way; it's repayment behaviour that matters.
Can I use a credit card with these BNPL apps?
Klarna and Clearpay let you fund repayments from a credit card. Zilch does not — it specifically refuses credit-card funding because it considers stacking debt on top of debt irresponsible. If you don't have a debit card or sufficient bank balance, Zilch is not the right fit.
Which BNPL has no late fees?
Zilch. Klarna charges up to £5 on missed Pay-in-3 instalments, Clearpay charges £6 per missed payment up to a cap. Zilch pauses your account on a missed payment but doesn't charge a fee in pounds.
What's the difference between Klarna Pay in 30 and Pay in 3?
Pay in 30 means you pay the full order amount within 30 days of receiving the goods, all in one go. Pay in 3 splits the amount into three monthly instalments, with the first taken at checkout and the rest each month. Both are interest-free if paid on time.
Can I use Zilch at Tesco or Amazon?
Yes. Because Zilch issues you a virtual Mastercard, you can use it at any merchant that accepts Mastercard — including Tesco, Amazon, eBay, supermarkets, takeaway apps, and in-store retailers. Klarna and Clearpay only work at merchants that have integrated their BNPL option directly at checkout.
Which BNPL is best for big purchases (£500+)?
Klarna, because it offers longer-term financing plans (6–36 months) for higher-value purchases. Clearpay and Zilch cap their interest-free Pay-in-4 model at six weeks, which can be tight for a larger purchase. Klarna's longer plans may charge interest depending on the retailer and term, so check the APR before committing.
Does using BNPL make it harder to get a mortgage?
It can, depending on usage patterns. Mortgage lenders increasingly check BNPL usage as part of affordability assessments. Heavy BNPL usage can be flagged as a sign of stretched finances. Light, well-managed use is generally not a red flag. If you're planning a mortgage application, paying off all BNPL balances in advance and pausing new BNPL usage for a few months is the cleanest approach.
