The payment methods you offer directly affect conversion rate — UK shoppers abandon checkouts that don't offer their preferred payment method — but each gateway comes with different fees, settlement times and dispute processes worth understanding before you commit.
Why offering the right mix matters more than picking 'the best' gateway
There is no single best payment gateway — the right mix depends on your customer base, average order value and category. A UK fashion retailer with a younger customer base benefits significantly from offering a Buy Now, Pay Later option; a B2B wholesale seller cares far more about invoicing and bank transfer support than about Apple Pay. Most successful UK stores run 2–4 payment methods rather than relying on a single processor.
Stripe: the developer-friendly standard
Stripe charges roughly 1.5% + 20p for UK cards and 2.5%+ for international cards (rates vary and are worth confirming directly, and negotiable at volume), settling funds to your bank account within a few business days. It supports an extremely wide range of payment methods through a single integration — cards, Apple Pay, Google Pay, and increasingly BNPL options — and offers strong built-in fraud tools (Stripe Radar) and clean reporting.
Stripe integrates natively or via app with virtually every major platform (Shopify, WooCommerce, Magento) and is generally the default recommendation for stores that want a single, reliable, well-documented processor rather than juggling several.
PayPal: trust and reach, at a cost
PayPal remains one of the most recognised payment brands among UK consumers, and offering it can measurably reduce cart abandonment simply because some shoppers won't enter card details on an unfamiliar site but will trust a PayPal button. Fees are broadly comparable to Stripe for standard transactions (around 2.9% + 30p domestically, higher internationally), though PayPal is often criticised for slower, less flexible dispute resolution that can favour the buyer even in borderline cases.
PayPal Buyer Protection cuts both ways: it builds trust for new customers unfamiliar with your brand, but a high volume of successful buyer claims against you can affect your account standing. Most UK stores offer PayPal as one option among several rather than the sole payment method, capturing the trust benefit without over-relying on its dispute process.
Klarna and BNPL: boosting average order value
Klarna, Clearpay and similar Buy Now, Pay Later providers let customers split payment into instalments (commonly three interest-free payments, or 'pay in 30 days') while you receive the full amount upfront, minus a merchant fee typically in the 4–6% range — notably higher than card processing fees. In exchange, BNPL adoption reliably increases average order value and conversion for categories like fashion, homeware and electronics, particularly among younger UK shoppers.
The trade-off is cost and consumer credit regulation: BNPL products are increasingly subject to FCA regulation in the UK (rules have been tightening), so ensure whichever provider you choose is presenting compliant affordability messaging and credit information to customers, since as the merchant your brand is associated with the customer's experience of that credit product.
Settlement times, chargebacks and cash flow
Settlement speed varies meaningfully between providers — some settle next-day, others take 3–5 business days — which matters for cash flow if you're funding stock purchases from sales revenue. Understand each provider's chargeback process and evidence requirements before a dispute arises: gateways that make it easy to submit tracking numbers, delivery confirmation and customer communication logs give you a materially better chance of winning disputed chargebacks than those with clunky, high-friction dispute portals.
A practical UK checkout stack
For most UK direct-to-consumer stores, a sensible baseline is: a card processor (Stripe or your platform's native payment processor) as the primary rail, PayPal as a trust-building alternative, Apple Pay/Google Pay enabled for frictionless mobile checkout, and a BNPL option if your average order value and customer demographic support it. For B2B or high-ticket sellers, add bank transfer/invoicing support even if it's manually processed, since larger buyers often prefer it regardless of what's technically available at checkout.
Where This Fits Into Your Wider Strategy
Getting choosing payment gateways for UK and international customers: stripe, payPal and klarna compared right is rarely a one-off task — it tends to need revisiting as the rest of the business changes around it. For a closer look at this, see our guide to Crowdfunding for UK Consumer Product Brands: Reward-Based, Equity and Debt Options Compared.
UK-specific rules add another layer worth planning for early rather than retrofitting. Tax thresholds, consumer protection obligations and data protection requirements all scale with the size and structure of your business, so it pays to understand roughly where those thresholds sit before you're already past them and scrambling to comply.
It's worth benchmarking your own plans against what similar UK sellers have actually done, rather than relying purely on theory. Trade forums, founder communities and case studies from businesses a year or two ahead of you are a faster way to learn what typically goes wrong than trial and error alone, and they'll usually flag the practical, unglamorous details — supplier lead times, cash flow timing, admin overhead — that generic guidance tends to skip.
For related reading: Many of the same principles come up again in Negotiating MOQs and Payment Terms with Overseas Factories, which is worth bookmarking for later. For the practical mechanics, see Win-Back Campaigns for Lapsed Customers: Re-Engaging Shoppers Before They're Gone for Good.