Stripe vs Adyen vs Checkout.com: A 2026 PSP Pricing Teardown

The PSP RFP that arrives on most operator desks compares three columns: Stripe at 2.9% + 30¢, Adyen at “interchange++ plus 0.60%,” and Checkout.com at “contact sales.” The finance team picks the lowest number. Six months later the effective cost is 80bps higher than projected, chargeback economics turn out to be unfavorable, and nobody remembered to model the FX markup on cross-border volume.

Comparing PSPs by headline rate is one of the most expensive mistakes in payments procurement. The actual cost equation is landed effective cost per successful dollar — which means authorization-rate uplift, scheme fees pass-through, dispute economics, FX stacking, and whether you clear the volume bar for a contract that matches the marketing page. This piece tears down what each of the three actually charges in 2026, what model it uses, and where each one wins.

The Three-Layer PSP Cost Stack

Before any comparison, the MDR on a card transaction is three layers stacked into one number:

1. Interchange — paid to the issuing bank, set by Visa/Mastercard, regulated in the EU and UK, uncapped in the US.
2. Scheme fees — paid to Visa/Mastercard themselves; 30+ line items, up 20–30% since 2019.
3. Acquirer / PSP margin — the only layer the PSP actually sets.

A blended PSP like Stripe absorbs all three into one published percentage. An IC++ PSP like Adyen passes interchange and scheme fees through at cost and charges its margin separately. The two models look comparable on a quote sheet but behave very differently as merchant volume, ticket size, and card mix shift.

This matters because card mix dictates which model wins. Regulated debit in the EU caps interchange at 0.20% — on that traffic, IC++ is dramatically cheaper than blended. Premium credit cards in the US push interchange above 2% — on that traffic, blended rates with included scheme fees can be cheaper than IC++ once the acquirer margin is added. The “right” PSP depends on a card mix the operator is rarely modeling carefully.

Stripe: The Published Rate Card

Pricing. Stripe publishes per-region rate cards. In the United States, card-not-present runs 2.9% + $0.30; manual entry adds 0.5%. In the United Kingdom, the structure tiers: 1.5% + 20p for standard UK domestic, 1.9% + 20p premium UK, 2.5% + 20p EEA, 3.25% + 20p international. Card-present (Terminal) is 2.7% + $0.05 in the US.

Stacking surcharges. A US-based merchant taking a euro card pays 2.9% + 30¢ + 1.5% international + 1% currency conversion. That is an effective ~5.4% on cross-border traffic, a number rarely modeled in procurement decks built off the 2.9% headline.

Disputes and fraud. $15 per dispute in the US, £20 in the UK, non-refundable on loss; Stripe’s Smart Disputes service charges 30% of the disputed amount on a successful win. Radar for Fraud Teams is $0.02 per transaction on standard pricing, $0.10 on custom. 3DS2 is included on standard pricing, $0.04 per attempt on custom.

Pricing model. Blended publicly. Custom contracts shift to interchange-plus / IC++ — typically negotiable around $80k–$1M+/month in card volume, though Stripe doesn’t publish a threshold. Below that, the published page is what you pay.

Sweet spot. SaaS, subscriptions, marketplaces (Connect), platforms launching fast, embedded finance (Treasury, Capital, Issuing). Best-in-class developer experience and the fastest ramp from zero to live on the market. Stripe was the 6th-largest US merchant acquirer in the Nilson Report 2025 ranking and was named a Leader in Forrester’s 2026 merchant payment provider wave.

2026 differentiators. Stripe Authorization Boost — AI-driven retries, Data-Only authentication, PINless debit retries — claims +3.8% acceptance and −3.3% processing cost. Network token and card account updater coverage expanded across Visa, Mastercard, and Amex. Sessions 2026 launched Checkout Studio, agentic-commerce APIs, and stablecoin rails.

Adyen: Indicative IC++

Pricing. Adyen publishes an “indicative” rate card: a $0.13 base fee per transaction plus IC++ with an acquirer markup that starts around 0.60% and scales down with volume. Alternative payment methods are priced separately — Klarna at $0.13 + 0.99–4.99% region-dependent, Alipay at $0.13 + 3%, Apple Pay at $0.13 + card fees passed through. Multi-currency settlement is offered to avoid FX where possible.

What’s hidden. Disputes, 3DS / RevenueProtect pricing, payout/withdrawal fees, the minimum monthly invoice (often €1,000+), volume tier breakpoints, and business eligibility — all contact-sales. Industry reporting suggests Adyen typically requires $500k+/month in processing for a direct contract; below that, merchants are routed to partner channels.

Pricing model. Pure IC++ with full pass-through transparency. Quote-based at the contract layer.

Sweet spot. Enterprise omnichannel — unified online + in-store + mobile on a single platform with one contract and one reconciliation feed. Single global acquirer in 30+ markets. Wins for retailers, airlines, travel, and marketplaces with physical + digital footprints (Uber, McDonald’s, eBay, Patagonia). Adyen entered the Nilson Top 10 US acquirers for the first time in 2025, displacing Square. FY 2025 processed €1,394.3B in volume (+21% excluding one large customer departure), €2,364.2M net revenue (+18%), and 99.9999% BFCM uptime on 837M transactions.

2026 differentiators. Adyen Uplift — AI suite generally available since 2025 — claims +6% authorization and an 86% reduction in manual fraud rules; piloted by Patagonia, Indeed, Nord Security, Fubo. Adyen has issued 2B+ active network tokens, with a machine-learning layer choosing token vs. PAN per transaction for an additional +1% incremental auth. Adyen for Platforms competes directly with Stripe Connect on embedded finance.

Checkout.com: No Published Rate Card

Pricing. Public pricing page positions “transparent IC++” and “fully flat-rate based on business profile and risk” — and lists no rates of any kind. Third-party reporting puts enterprise tier at roughly interchange + 0.10–0.40% + $0.08 per transaction. Industry estimates for non-enterprise traffic land around 2.3–2.9% + $0.30 — but Checkout.com publicly focuses on merchants at meaningful annual volume. SMB applicants are typically referred elsewhere.

Pricing model. Interchange++ with flat acquirer markup, fully quote-based. Effectively enterprise-only.

Sweet spot. High-volume card-not-present, global digital-native enterprises, marketplaces, crypto, gaming, travel, streaming, BNPL providers. Strong on Middle East and APAC where Stripe and Adyen have thinner local acquiring. Direct acquiring in 50+ currencies. Processed $300B+ in 2025 with 63 merchants doing $1B+/year each — Netflix, Coinbase, eBay, Uber, Spotify, Temu, Pinterest, ASOS, Vinted. Returned to full-year EBITDA profitability with 10%+ margin. Valuation reset to $12B in September 2025 from the 2022 $40B peak.

2026 differentiators. Intelligent Acceptance has unlocked a claimed $10B+ in merchant revenue since its 2023 launch, with 60M real-time optimizations per day, an average +3.8% acceptance lift, and up to +9.5pp in best cases (Reach reported ~10% auth uplift). Flow Remember Me launched in October 2025 for one-click global checkout. Issuing reached a $5B run-rate by Q4 2025, expanding into the US and UAE through 2026.

The Pricing-Comparison Trap: Seven Mistakes Operators Make

1. Comparing headline % without scheme-fee pass-through. Adyen’s “0.60% + IC++” sounds more expensive than Stripe’s “2.9% + 30¢” until you realize Stripe’s blended rate hides interchange + scheme markup that on regulated EU debit can be 5x what a true IC++ contract would cost. The comparison only holds at matching card mix.

2. Ignoring FX markup. Stripe stacks +1.5% international + 1% (US) or 2% (UK/SG) currency conversion. On a euro-denominated card hitting a US merchant account, the effective rate is ~5.4%. Most operators don’t see this in the procurement deck because nobody added the international + FX line items to the 2.9% headline.

3. Missing the minimum monthly invoice. Adyen’s ~€1,000/month floor and Checkout.com’s enterprise-only posture mean SMB-volume operators will overpay vs. the published indicative rate card. The marketing page is a contract for a merchant the operator may not be.

4. Ignoring auth-rate as a cost. A 2-percentage-point authorization-rate gap is usually larger than the entire processing-fee delta between providers. Uplift, Authorization Boost, and Intelligent Acceptance all claim ~+3.8–6%. The comparison that actually matters is landed effective cost per successful dollar, not headline rate. On a $100M annual run-rate, +2pp of auth is $2M of revenue that 30bps of fee savings will never recover.

5. Dispute economics asymmetry. Stripe’s flat $15/£20 per dispute is cheap and predictable. Adyen and Checkout.com bury dispute pricing in the contract — operators discover the real numbers post-signature, after switching costs are sunk.

6. Confusing “transparent” with “published.” Both Adyen and Checkout.com market transparency. Only Adyen actually publishes indicative IC++ structure. Checkout.com publishes literally nothing on its pricing page. Marketing language and disclosed numbers are different things.

7. Comparing US ranking to global capability. Stripe leads US Nilson rankings; Adyen leads global enterprise; Checkout.com leads non-US digital-only. Using one ranking to choose a PSP for a multi-region rollout is the most common failure mode in international procurement — and the hardest to reverse, because integration depth varies dramatically across all three.

A Decision Framework

The question isn’t which PSP is cheapest. It’s which model fits the merchant profile.

Pick Stripe when: Volume is under $500k/month, the team needs to ship in days not quarters, the product is SaaS or marketplace-shaped, embedded finance is on the roadmap, and US/UK card-not-present is the primary card mix. Stripe’s blended rates plus developer experience win below the volume threshold where IC++ negotiation pays off.

Pick Adyen when: Volume is north of $500k–$1M/month, the merchant is omnichannel (online + in-store), card mix skews enterprise (high regulated debit share, premium credit), reconciliation matters more than launch speed, and global single-acquirer coverage is operationally valuable. Adyen wins where IC++ pass-through plus volume tier discounts plus unified omnichannel infrastructure beat blended pricing.

Pick Checkout.com when: Volume is $1B+/year, business is digital-native and card-not-present heavy, geography centers on EMEA/APAC where Stripe and Adyen acquiring is thinner, and Intelligent Acceptance’s auth-rate gains compound across high transaction volume. Checkout.com is enterprise-only by design; below the volume threshold, it isn’t a real option.

For most operators, the realistic decision is Stripe vs. Adyen — not because Checkout.com is worse, but because most operators don’t clear its volume bar. The decision between Stripe and Adyen comes down to two questions: does the merchant have negotiation leverage at IC++ scale, and does omnichannel matter more than developer velocity?

What Operators Should Actually Do

The pricing comparison that matters cannot be done from rate cards alone. It requires a card-mix model, an FX exposure model, and an auth-rate baseline measured on the merchant’s own traffic.

The minimum viable comparison is: project annual volume by region; pull the BIN distribution from existing acquirer data to estimate interchange exposure; layer in dispute rate and average dispute economics; estimate FX exposure on cross-border traffic with realistic stacking; then quote each PSP with that profile in hand. The published rate card is a starting position for negotiation, not a final number.

For operators above $500k/month, the highest-leverage move is requesting IC++ from Stripe and IC++ pricing breakpoints from Adyen for direct comparison. For operators above $1B/year, all three are negotiable, and the decision is rarely about price — it’s about which auth-rate optimization platform compounds best on the merchant’s specific card mix.

The PSPs that win in 2026 are the ones that move auth-rate up by more than competitors move processing fees down. Pick on landed effective cost per successful dollar. The headline rate is theatre.