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Personal Finance · head to head

Affirm vs Mollie

Affirm logo

Affirm

Personal Finance

Buy now pay later app offering short interest-free plans and longer plans that charge real APR interest

From
Free
Rated
-
Full reviewWebsite
Mollie logo

Mollie

E-Commerce

European payment service provider with published per-transaction rates and no monthly fee on the online plan

From
£0.3/transaction
Rated
-
Full reviewWebsite

The short version

  • Only Affirm has a free tier, so it costs nothing to try first.
  • Each has a real cost: Affirm longer instalment plans carry real interest, up to roughly 36 percent APR depending on the retailer, item and applicant, which is a genuine borrowing cost that the buy now pay later framing can obscure for shoppers who do not read the terms shown before accepting.; Mollie non-European cards cost 3.25% plus 20p against 1.20% plus 20p for UK domestic consumer cards, so a merchant with significant traffic from the US or Asia pays close to triple the domestic rate on that revenue.
  • They diverge on capability: Affirm covers Pay in 4, Mollie covers Local payment methods.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Affirm and Mollie actually diverge.

Attributes where Affirm and Mollie differ
AttributeAffirmMollie
Starting priceFree£0.3/transaction
Pricing modelFree for short Pay in 4 plans; longer plans carry a disclosed APR up to roughly 36 percent, merchant pays a transaction feePer transaction by payment method
Free tierYesNo
PlatformsiOS, Android, WebWeb, iOS, Android, API
CategoryPersonal FinanceE-Commerce

Identical on both: user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Affirm

  • Pay in 4
  • Monthly instalment loans
  • Soft credit check
  • No late fees
  • Affirm Card
  • Pre-purchase terms disclosure

Only in Mollie

  • Local payment methods
  • Published rate card
  • Hosted checkout and payment links
  • Subscriptions API
  • Point of sale terminals
  • Plugin ecosystem
  • Multicurrency settlement

What people use each for

The jobs each tool is most often brought in to do.

Affirm

  • A shopper financing a large purchase such as furniture or electronics who wants disclosed APR terms compared directly against a credit card before committingnot Mollie
  • Someone using the short Pay in 4 plan for a smaller purchase who intends to pay it off within six weeks with no interestnot Mollie
  • A borrower who has missed a payment before and specifically wants a lender that does not charge late feesnot Mollie
  • A retailer offering point-of-sale financing to reduce cart abandonment on higher-ticket items, in exchange for paying Affirm a transaction feenot Mollie

Mollie

  • A Dutch or Belgian shop where most customers pay by iDEAL or Bancontact and the flat 30p beats a percentage rate on high-value basketsnot Affirm
  • A small merchant that wants published pricing rather than a sales call before it can model card costsnot Affirm
  • A subscription business in the EEA collecting by SEPA Direct Debit mandate instead of cardnot Affirm
  • A marketplace or platform that needs one integration covering the main European local methodsnot Affirm

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Affirm

  • Longer instalment plans carry real interest, up to roughly 36 percent APR depending on the retailer, item and applicant, which is a genuine borrowing cost that the buy now pay later framing can obscure for shoppers who do not read the terms shown before accepting.
  • Even with no late fees, Affirm reports many loans to credit bureaus, so a missed or late payment on a longer plan can affect a credit score in a way the marketing around interest-free short plans does not prepare shoppers for.
  • Approval and APR both vary by individual loan, so the same shopper can be offered interest-free terms on one purchase and a high APR on another, making the cost unpredictable until checkout.
  • Merchants pay a transaction fee to offer Affirm at checkout, a cost typically built into retail pricing, so shoppers who pay by other means still indirectly subsidise the option even if they never use it.
  • The Affirm Card blurs the line between buy now pay later and a general-purpose credit card, and using it for everyday spending on interest-bearing terms can compound borrowing cost in a way a single point-of-sale purchase would not.

Mollie

  • Non-European cards cost 3.25% plus 20p against 1.20% plus 20p for UK domestic consumer cards, so a merchant with significant traffic from the US or Asia pays close to triple the domestic rate on that revenue.
  • Coverage is built around European methods, so if you expand into Latin America or Southeast Asia you will need a second processor and a second reconciliation process rather than extending Mollie.
  • The in-person Pro plan requires a one-year contract and charges 20 pounds a month per additional terminal, so a shop with four tills pays 80 pounds a month in terminal fees before any transaction cost.
  • Mollie offers no interchange-plus option publicly, so large merchants cannot see or benefit from falling interchange the way they could on a cost-plus contract with an acquirer.
  • The developer tooling and reporting are lighter than the largest processors, so finance teams that want detailed fee breakdowns or granular reconciliation exports often end up building that layer themselves.

Pricing, plan by plan

Affirm

Free
  • Pay in 4Free
    • No interest if paid on time over six weeks
    • No late fees for a missed payment
    • Soft credit check at application
  • Monthly instalmentsFree
    • APR disclosed before the loan is accepted, up to roughly 36 percent depending on retailer and applicant
    • Terms from three to 36 months depending on purchase amount
    • Payment history can be reported to credit bureaus

Mollie

£0.3/transaction
  • Online paymentsFree
    • No monthly fee
    • UK domestic consumer cards 1.20% + 20p
    • European and commercial cards 2.90% + 20p
  • In person, pay as you goFree
    • No monthly commitment
    • Per-transaction terminal rates
    • One terminal
  • In person, Pro$20/month
    • Lower per-transaction terminal rates
    • One-year contract required
    • Each additional terminal 20 pounds per month

Which should you pick?

Choose Affirm if

  • You need pay in 4.
  • You want to start without paying.
  • You work on iOS, Android, Web.
  • You also want monthly instalment loans.
Affirm review

Choose Mollie if

  • You need local payment methods.
  • You work on Web, iOS, Android, API.
  • You also want published rate card.
Mollie review

Questions people ask

Is Affirm or Mollie better?
Neither clearly leads. Affirm starts at Free and Mollie at £0.3/transaction, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Affirm or Mollie?
Affirm has a free tier; the other does not. Paid plans start at Free for Affirm and £0.3/transaction for Mollie.
Does Affirm or Mollie run on more platforms?
Affirm runs on iOS, Android, Web. Mollie runs on Web, iOS, Android, API.
Can I use Affirm for free?
Yes. Affirm has a free tier, so you can try it without paying. Mollie starts at £0.3/transaction.
What is Affirm best used for?
Affirm is most often used for a shopper financing a large purchase such as furniture or electronics who wants disclosed apr terms compared directly against a credit card before committing, someone using the short pay in 4 plan for a smaller purchase who intends to pay it off within six weeks with no interest, a borrower who has missed a payment before and specifically wants a lender that does not charge late fees, a retailer offering point-of-sale financing to reduce cart abandonment on higher-ticket items, in exchange for paying affirm a transaction fee. Of those, a shopper financing a large purchase such as furniture or electronics who wants disclosed apr terms compared directly against a credit card before committing and someone using the short pay in 4 plan for a smaller purchase who intends to pay it off within six weeks with no interest are not what Mollie is typically brought in for.
What can Affirm do that Mollie cannot?
Affirm covers Pay in 4, Monthly instalment loans, Soft credit check, No late fees. Mollie covers Local payment methods, Published rate card, Hosted checkout and payment links, Subscriptions API.

Answered from the vendors’ own pages

Affirm: Does Affirm always charge interest?

No, short Pay in 4 plans over six weeks are typically interest-free if paid on time; longer instalment plans of three to 36 months can carry a disclosed APR up to roughly 36 percent.

Mollie: Does Mollie charge a monthly fee?

Not on the online payments plan. You pay only per successful transaction. In-person Pro is 20 pounds a month.

Affirm: Does Affirm charge late fees?

No, Affirm does not charge late fees for a missed payment, unlike some buy now pay later competitors, but missed payments can still be reported to credit bureaus.

Mollie: Is iDEAL really a flat fee?

Yes, 30p per transaction regardless of the amount, which is why it is cheaper than cards on high-value baskets.

Affirm: Will using Affirm affect my credit score?

The initial application uses a soft credit check that does not affect your score, but Affirm reports many resulting loans to credit bureaus, so payment history on the loan itself can affect your score.

Mollie: Can I use Mollie outside Europe?

You can accept non-European cards but at 3.25% plus 20p, and merchant accounts are aimed at European businesses. It is not a global processor.

Mollie: Does Mollie do interchange plus?

Not publicly. The published rates are blended, so falling interchange does not flow through to you automatically.

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