Scaling Your Business with Klarna Payments

The UK BNPL market is projected to reach £47.27 billion by 2029 — and merchants offering flexible checkout options already convert 20–30% better than those without. Klarna payments set the benchmark for buy now, pay later in the UK, giving buyers structured repayment options while merchants receive full order value upfront. TODA Pay extends that model further, delivering Klarna flexible payments functionality to businesses that need broader coverage — including high-risk industries, importers, and B2B-facing platforms.

How Klarna Flexible Payments Work for Merchants

Klarna payments operate as a buffer between buyer and merchant. The customer selects a repayment plan at checkout; Klarna pays the merchant the full order amount minus its fee immediately; Klarna then collects instalments directly from the buyer. Critically, Klarna assumes the credit risk — merchant revenue is protected regardless of whether the customer completes repayment.

Four payment options are available to UK buyers:

• Pay in Full — immediate payment via linked card or bank transfer; up to GBP 4,000
• Pay Later — single payment deferred 30 days; up to GBP 1,500
• Pay in 3 — three equal interest-free instalments; up to GBP 2,000
• Financing — monthly repayments up to 36 months; GBP 250–5,000, subject to credit approval

Each option is presented dynamically at checkout based on transaction amount and buyer profile — merchants do not manage credit decisions or repayment schedules.

Klarna Payment Gateway Integration: Three Setup Methods

Connecting Klarna payment gateway to an existing store follows one of three technical paths, each with a different balance of speed and control. Gateway-based integration — via Stripe, Adyen, or PayPal — activates Klarna as an additional method within an existing payment stack, requiring no custom development. Native platform plugins for Shopify, WooCommerce, BigCommerce, and Magento embed Klarna directly into checkout, with authorisation flowing between Klarna and the platform independently. Direct API integration gives full control over payment presentation and authorisation logic, suited to custom storefronts with dedicated engineering resources.

Technical Requirements Before You Accept Klarna Payments

Before activation, four baseline requirements apply:

1. Secure environment — HTTPS with a valid SSL certificate is mandatory across all integration methods
2. Customer data collection — checkout must capture email address and shipping details for Klarna’s authorisation process
3. Merchant eligibility — business verification and Klarna’s underwriting process must be completed during onboarding
4. Transaction identification — gross sale amount, fees, and refunds must be separately identifiable in the merchant’s systems from day one

Meeting these requirements upfront prevents reconciliation gaps during the first payout cycle.

Klarna Payment Gateway Pricing and Merchant Fees

Klarna payment gateway pricing combines a fixed per-transaction fee with a percentage of the sale amount. Rates vary by payment method, country, and merchant volume. UK merchants should account for BNPL fees — typically in the 3–6% range — within margin calculations before activation.

BNPL processing costs run higher than standard card fees — and that differential funds measurable revenue performance. Merchants reporting a 27% average revenue uplift post-integration are absorbing higher per-transaction costs against materially larger order volumes and values.

Business Results: What Klarna Payments Options Deliver

The commercial case for Klarna payments options rests on four measurable outcomes, each documented across merchant cohorts:

• Conversion rate increases by 20–30% when flexible payment options appear at checkout
• Average order value rises as buyers commit to higher-priced items when repayment is spread
• Cart abandonment drops — 64% of merchants report a reduction after implementing BNPL at checkout
• Revenue grows by an average of 27% in the period following Klarna integration

The UK BNPL market recorded £29.85 billion in transaction value in 2024. Incoming FCA oversight — requiring affordability checks, clearer disclosures, and ombudsman access — strengthens buyer confidence in regulated BNPL providers, which translates directly into higher conversion rates for compliant merchants.

Payments Like Klarna: When Alternatives Make More Sense

Klarna payments UK covers the majority of standard ecommerce use cases — but four scenarios consistently push merchants toward alternative providers:

• B2B transactions — Klarna does not support business-to-business payments; B2B merchants require a PSP with BNPL functionality outside consumer-only frameworks
• High-risk merchant categories — Klarna’s underwriting restricts or excludes high-risk industries; specialist PSPs provide equivalent flexible payment infrastructure without categorical barriers
• Margin-sensitive verticals — merchants with tight margins benefit from PSPs offering competitive fee structures calibrated to volume and industry type
• Cross-border and multi-currency operations — importers and platforms operating across multiple regions need a provider whose currency and geography coverage matches actual trading patterns

These are not edge cases. They represent structured segments — SME operators, enterprise platforms, and specialist importers — that require payments like Klarna without Klarna’s operational constraints.

Accept Klarna-Style Payments Through TODA Pay

Merchants that need Klarna flexible payments UK functionality — without the onboarding restrictions, B2B exclusions, or category limitations — have a direct alternative. TODA Pay delivers BNPL-compatible payment infrastructure for UK merchants across SME, enterprise, high-risk, and platform segments. Flexible payment options, upfront merchant settlement, and gateway integration are available without the eligibility barriers that standard BNPL providers impose.

For high-risk businesses, importers, and B2B-facing platforms, TODA Pay provides the payment flexibility that drives conversion — built for the merchant profiles that need it most.

Start accepting flexible payments with TODA Pay and give your customers the checkout experience that converts.

Frequently Asked Questions 

What are the main Klarna payment options available in the UK?

UK merchants can offer Pay in Full, Pay Later (30 days, up to GBP 1,500), Pay in 3 (up to GBP 2,000), and Financing (up to GBP 5,000 over up to 36 months). Option availability at checkout depends on the transaction amount and the buyer’s credit profile assessed by Klarna at the point of purchase.

How does Klarna payment gateway integration work technically?

Integration runs through three paths: enabling Klarna within an existing gateway such as Stripe or Adyen, installing a native plugin on Shopify or WooCommerce, or building a direct API connection for custom storefronts. The gateway route is the fastest to activate and requires no custom development on the merchant side.

What are Klarna’s merchant fees for UK businesses?

Klarna charges a percentage of the transaction amount plus a fixed fee per transaction, with rates varying by payment method and merchant volume. BNPL fees across providers typically range from 3–6% — a differential that merchants recover through higher average order values and improved conversion rates.

Can high-risk merchants accept payments like Klarna?

Klarna restricts onboarding for several high-risk merchant categories and does not support B2B payments. Specialist payment service providers offer equivalent BNPL functionality for high-risk merchants, importers, and platforms, with onboarding processes designed for non-standard business profiles.

How does FCA regulation affect Klarna payments in the UK?

FCA oversight of BNPL providers, being introduced through 2025–2026, requires affordability checks, transparent terms, and access to the Financial Ombudsman Service. For merchants, regulated BNPL creates a higher-trust checkout environment — buyers using FCA-supervised payment options demonstrate stronger purchase intent and lower dispute rates.