Klarna vs Afterpay vs Affirm: which BNPL is right for you?

Key takeaways

Klarna, Afterpay, and Affirm all split a purchase into four payments, and all three now sell longer plans that charge interest.

Afterpay added Pay Monthly in 2022, with terms of 3 to 24 months and APRs running from 0% to 35.99%.

Affirm charges no late fees, but it reports every loan to the credit bureaus, so a missed payment shows up on your file.

Afterpay’s Pay in 4 is the gentlest on credit, because those loans are generally not reported to the bureaus.

Practices can run deposits and payment plans inside practice management software like Pabau, without opening a second merchant account.

Klarna vs Afterpay vs Affirm is the choice millions of shoppers now make at checkout. In 2023, six buy now, pay later lenders wrote 335.8 million loans worth $45.2 billion, according to the Consumer Financial Protection Bureau. All three split a purchase into four interest-free payments, so that part is settled. What separates them is late fees, credit reporting, and how long you can stretch a bill. Pick the wrong one and a shopper pays interest nobody mentioned, or a credit file takes a hit. This guide compares the three on plans, cost, and credit impact. Then it looks at what each one asks of a practice at checkout.

Klarna vs Afterpay vs Affirm: the differences that decide the cost

Here is the full comparison in one table. Start with the late fees and credit reporting rows, because those two settle most decisions.

Pay in 4 is no longer the whole product at any of the three

Each provider now sells two things: a short interest-free plan, and a longer plan that charges interest. The short plans are close to identical. The long plans are where the money goes, and they stretch much further than most shoppers realize.

Klarna gives you the most ways to split a bill

Klarna offers four routes to the same purchase, which is more variety than either rival. Pick by the size of the bill and how soon you can clear it.

• Pay in 4: four equal payments every two weeks, 0% interest, no fees if you pay on time
• Pay in 30 days: settle the full balance within a month, which suits returns-heavy purchases like clothing
• Monthly financing: terms up to roughly 36 months, with APR reaching about 33.99% depending on your credit
• Klarna virtual card: a single-use card that works anywhere Visa is accepted, even outside Klarna’s merchant network

Afterpay quietly grew past four payments

Afterpay is no longer a pay-in-4 company. Alongside the original four payments every two weeks, it has offered Pay Monthly since 2022. Those loans run 3, 6, 12, or 24 months, start at $100, and reach $20,000 at some merchants. APRs range from 0% to 35.99%, and interest is charged on the principal only.

The two products behave differently when a payment slips. Pay in 4 charges late fees. Pay Monthly does not, because First Electronic Bank underwrites it as a regular installment loan. Afterpay also raises your Pay in 4 spending limit as you build a repayment history. A first order may be capped lower than you expect.

Affirm trades interest for zero late fees

Affirm sits between the other two. It offers pay-in-4 for smaller baskets at 0%, then monthly plans of 3 to 36 months for larger ones. Rates run from 0% at select merchant partners up to 36% APR, set by your credit profile.

Its headline promise is simple: Affirm never charges a late fee. The trade-off is visibility. Every Affirm loan goes to the credit bureaus, so the record of how you paid follows you.

The cheapest plan depends on whether you pay on time

If you always pay on time, all three interest-free plans cost you nothing, and the choice barely matters. If you sometimes miss a date, the fee model decides the winner. Some providers front-load cost into APR, while others collect it through late fees.

Interest on a long plan adds up quietly. Afterpay publishes a worked example: a $1,000 loan over 12 months at 21% APR costs $1,117.40 in total. That is $117 for the convenience of paying monthly. On a $3,000 course of treatment, the same rate would add roughly $350.

So the fee models split three ways. Affirm removes the penalty for slipping but charges interest on longer plans. Klarna gives you 10 days of grace before a fee lands. Afterpay caps total Pay in 4 late fees at a quarter of the order value, which keeps the worst case predictable.

Only Afterpay’s Pay in 4 leaves your credit score alone

If protecting your credit score is the priority, Afterpay’s Pay in 4 is the safest of the three. It runs a soft check and generally keeps those loans off your credit file. Here is how each provider handles it.

• Klarna: runs a soft credit check for most plans, which does not affect your score. Longer financing may involve extra checks, and some plans are reported. Confirm the specific product before you apply.
• Afterpay: uses a soft credit check on Pay in 4, and those loans are generally not reported to the bureaus. Pay Monthly is a different product, so expect it to be treated as a normal loan.
• Affirm: starts with a soft check, then may run a hard inquiry on certain monthly plans. Every Affirm loan reaches the bureaus. On-time payments can help your score, and missed ones can hurt it.

The CFPB’s market report makes the same point from the industry side. Reporting practices differ from lender to lender, so shoppers assume all these loans behave alike. They do not.

Klarna’s virtual card is why it works almost anywhere

Klarna has the widest reach of the three, mostly because of one feature. A great fee structure will not help you if the option never appears at checkout, so acceptance deserves a look before you commit.

• Klarna passed 1 million merchants globally in March 2026, by its own count. Its virtual card also extends the service to any retailer that takes Visa, online or in store.
• Afterpay is accepted at tens of thousands of retailers, and it is strongest in fashion, beauty, and lifestyle. A digital wallet covers in-store use at participating merchants.
• Affirm is built into large US retailers including Amazon and Walmart, plus many electronics and home goods stores. It also issues a card for merchants that have not integrated it directly.

In practice, the three overlap heavily. Fashion, electronics, and home goods are covered by all of them, and health and wellness services are catching up fast. Which brings us to the side of this comparison that shoppers never see.

The merchant fees no provider puts on a price list

None of the three publishes a standard US merchant rate on its website. Each one quotes you after an application, based on your volume, your category, and where you trade. So the only figure you can trust is the one in your own contract, and you have to ask for it.

The mechanics are consistent across all three. The provider pays you in full, keeps a commission on each transaction, and takes on the collection risk. Affirm tends to price longer plans higher, because it carries the financing risk rather than the merchant.

The admin is where practices get caught out. Every provider needs its own merchant account, its own approval process, and its own checkout integration. Run two of them and you are reconciling two settlement reports against one appointment calendar.

Run this checklist before you switch BNPL on at checkout

Six questions save most of the pain later. Work through them with the provider before you sign.

• What is the commission on each plan type? Longer terms usually cost you more than pay-in-4.
• When does the money actually land? Ask for the settlement schedule in days, not “quickly”.
• Who handles a refund? Confirm how a partial refund on a treatment package reaches the patient’s plan.
• What happens on a no-show? A BNPL plan covers a purchase, not a missed appointment fee, so keep a signed credit card authorization form on file.
• Can your front desk see the plan? If not, staff will be answering questions they cannot look up.
• Does it reconcile with your existing clinic payment processing? Two systems mean two sets of numbers to match every month.

Refund rights get murky once a payment plan is involved

All three offer some form of dispute resolution, but the depth varies, and none of it matches a credit card. Here is what each one gives you when an order goes wrong.

• Klarna: buyer protection on eligible purchases, plus a dispute process for goods that never arrive or arrive misdescribed. The 10-day grace period buys a short buffer, and hardship help is available on request.
• Afterpay: refunds and disputes follow the merchant’s own policy. Missed Pay in 4 payments trigger fees, though the 25% cap limits the damage. Payment extensions are handled case by case.
• Affirm: support can discuss hardship options, including deferrals. Because Affirm reports to the bureaus, raising it before you miss a payment protects your file. No late fee applies either way.

The Federal Trade Commission puts it plainly. Plans advertised as interest-free still charge fees, and refunds do not always flow back through the plan the way a card chargeback would. Before you buy, check that a return will actually credit the installments.

Healthcare BNPL was built for retail, and it shows

All three work at healthcare providers, but only where that provider has set up a merchant account first. The patient experience is the same as buying shoes. Split the invoice at checkout, then pay it down.

What the patient does not see is the disconnect behind the desk. None of these platforms talks to appointment booking, treatment records, consent forms, or clinical notes. The practice ends up running payment in one system and care in another.

Cherry is worth knowing about here. It was built for elective healthcare and aesthetics, with higher approval rates and underwriting tuned to treatment plans. It still sits outside your practice software, so the reconciliation problem stays.

There is also a quieter question underneath all of this. Would better collections solve the problem instead? Deposits, clear payment terms, and prompt invoicing recover a lot of revenue that practices assume needs financing. Our guide to patient collections walks through that math. If you do want card payments taken in the room, a clinic POS terminal handles the balance at the end of the appointment.

The trade-off each provider asks you to accept

Every one of the three asks for something in return for the flexibility. Here is the deal each one offers.

Pick your plan by how you pay, not by the brand

Three questions decide it. How big is the purchase, how reliably do you pay, and does your credit file need protecting right now?

• Choose Klarna for moderate purchases you will clear inside the interest-free window. The virtual card also covers retailers that do not offer buy now, pay later at all.
• Choose Afterpay’s Pay in 4 if you want zero interest and no credit bureau activity. It suits fashion, beauty, and lifestyle buying, where its merchant network is deepest.
• Choose Affirm for a large purchase that needs more than four payments. You accept interest in exchange for no late-fee risk, and the loan can build your credit history.
• If you run a practice, weigh a purpose-built option against three separate merchant relationships. Deposits and in-house plans often cover the same need with far less admin.

How Pabau runs deposits and payment plans in one place

Right now, a practice offering flexible payment usually bolts a third-party app onto checkout. Someone applies for a merchant account, waits for approval, and adds a widget to the booking page. From then on, payment data lives in one place and patient records live in another.

Practice management software like Pabau takes a different route. Deposits, installment schedules, and invoices all sit next to the appointment and the treatment note that created them, in one practice management app. Payments run through Stripe, so you keep one settlement report and one set of numbers to reconcile.

The result is a shorter workflow for your front desk. Staff can see what a patient has paid, what is still scheduled, and what to chase, without opening a second dashboard. Patients get the flexibility they came for, and you keep the whole picture in one system.

Offer flexible payment without a second merchant account

Pabau lets your practice take deposits, run installment schedules, and issue invoices inside the same platform that manages appointments, records, and patient messages. One settlement report, one place to look.

Book a demo

Conclusion

There is no single winner here, and anyone who names one is selling something. Afterpay’s Pay in 4 does the least to your credit file. Affirm is the most honest about cost, because the APR is on the screen before you commit. Klarna gives you the most ways to structure the same purchase.

The part worth remembering is that “interest-free” now describes only part of each provider’s range. Once you cross into monthly plans, all three charge close to the same rate. So read the plan, not the logo.

If you are on the practice side of that checkout, the decision looks different again. Every provider you add is another account to reconcile, and patients often just need a deposit and a clear schedule. Book a demo to see how Pabau handles deposits and payment plans alongside your bookings and patient records.

Continue your research

Wondering whether better collections beat financing? Patient collections: how to improve your collection rate covers deposits, payment terms, and chasing balances without awkward calls.

Taking card payments for treatment in the US? HIPAA compliant payment processing: a practice guide explains what your payment stack has to keep separate, and why.

Need permission on file before you charge a card? Credit card authorization form is a free PDF with a field checklist you can hand to patients at intake.

Frequently asked questions