Stripe vs Adyen vs Mollie: e-commerce payments and accounting reconciliation in France

Quick answer. In 2026, Stripe (1.5% + EUR 0.25 for European standard cards), Adyen (interchange++ model with acquiring markup around EUR 0.10-0.12 per transaction) and Mollie (1.8% + EUR 0.25 EU consumer cards) are the three main payment service providers used by French e-commerce companies. All three comply with PSD2 and the Strong Customer Authentication (SCA) imposed by Commission Delegated Regulation (EU) 2018/389 of 27 November 2017. The choice depends less on the headline rate than on the economic model (flat vs interchange++), accounting export quality, Pennylane or Sage integration, OSS/IOSS marketplace handling and monthly reconciliation clarity.

For an e-commerce CEO, the payment provider is not just a checkout button. It directly affects conversion rate (3DS2 frictionless, local wallets), net margin by channel (visible and hidden fees), accounting reconciliation (CSV formats, API, native plugin), OSS/IOSS VAT, chargeback management and the ability to close in D+5 according to our monthly fast close method.

The right choice depends on the model: French Shopify B2C store, European DNVB selling across multiple EU countries, marketplace subject to the EU VAT e-commerce package, B2B SaaS with recurring subscriptions, omnichannel retail or international group with multi-currency acquiring. We recently advised a fashion DNVB with EUR 4.2 million revenue across five EU countries, deciding between staying on Stripe and migrating to Adyen: the flow audit revealed EUR 38,000 of real annual card fees (1.8% effective), EUR 6,200 of FX differences not captured in gross sales, and an OSS risk on EUR 480,000 of misqualified intra-EU distance sales. The final decision did not hinge on the headline rate.

• Stripe is often the best choice for SaaS startups, recurring subscriptions (Billing), structured micro-fees (Connect for marketplaces) and fast integration via a documented REST API. Standard EEA card rate 2026: 1.5% + EUR 0.25; international cards 3.25% + EUR 0.25; currency conversion at 2% above the interbank rate. Stripe is established in Ireland (Stripe Payments Europe Ltd) and regulated by the Central Bank of Ireland.
• Adyen typically wins beyond EUR 5 to 10 million of processed revenue for large volumes, omnichannel physical plus online flows, multi-currency operations and structured organisations. Interchange++ economic model: real interchange (variable by Visa/Mastercard) plus scheme fees plus Adyen markup (typically EUR 0.10-0.12 per acquired transaction). Adyen N.V. is established in the Netherlands, holds a DNB banking licence since 2017; in France, Adyen is registered with Regafi (ACPR Banque de France) as a passported European credit institution.
• Mollie is relevant for European B2C merchants seeking an accessible solution with no setup fees or commitment, supporting local EU payment methods (iDEAL, Bancontact, Giropay, KBC). Standard 2026 EU consumer card rate: 1.8% + EUR 0.25. Mollie B.V. is established in the Netherlands as a DNB-authorised e-money institution.
• The accounting criterion is the ability to reconcile each month: gross sales, PSP commissions, refunds, chargebacks, FX differences, collected taxes (OSS/IOSS), marketplace commissions and settlement delays (T+2 to T+7 depending on contract). Without this reconciliation, net margin by channel is invisible and VAT is misqualified.
• All three providers comply with PSD2 (Directive (EU) 2015/2366) and enforce SCA via 3DS2 for B2C payments above EUR 30 in the EU. TRA (Transaction Risk Analysis) exemptions up to EUR 500 are managed automatically by each PSP based on its risk score.
• None of the three is an approved platform (PA) under the French e-invoicing reform 2026-2027: a PSP collects payments, while a PA issues and receives structured Factur-X invoices. The two roles coexist and cannot substitute for each other.

• B2B SaaS with recurring subscriptions: Stripe Billing is often the standard for automatic proration, dunning, retries, MRR/ARR tracking, taxes (Stripe Tax for OSS/IOSS, automatic rates per country). Plan monthly reconciliation via the Pennylane Pack or the Stripe API to avoid gaps between recognised revenue and invoiced amount (IFRS 15 / French PCG 944 standards).
• Omnichannel retail with physical stores and e-commerce: Adyen provides a unified online + POS view (V400, S1F2 terminals), direct multi-country acquiring and consolidation of settlements on a single bank account. Relevant above EUR 10 million of processed revenue and 50 stores.
• European B2C Shopify store with moderate growth (EUR 1 to 5 million revenue): Mollie offers a 48-hour setup, iDEAL for the Netherlands (50% of NL payments), Bancontact for Belgium, and a readable rate with no commitment. Stripe remains competitive with Shopify Payments as the default option.
• European marketplace (third-party sellers, OSS/IOSS, split payments): Stripe Connect, Adyen for Platforms and Mollie Connect all handle split payments and VAT collection on behalf of sellers. Test reconciliation with a dozen real sellers before rolling out. See our analysis of international marketplace flows and OSS/IOSS VAT reconciliation.
• Fashion DNVB with intra-EU distance sales: check the OSS threshold crossing at EUR 10,000 excluding VAT per year (article 259 D of the French tax code); beyond that, VAT must be declared in the country of consumption via the OSS one-stop shop, with monthly bank reconciliation per country. Stripe Tax and Adyen Tax automate part of the calculation; Mollie leaves more accounting work to the merchant.
• Selling on Amazon, Cdiscount or third-party marketplaces: the marketplace PSP prevails. But the merchant must reconcile the consolidated net settlement with gross sales, commissions, returns and FBA fees. See our deep dive selling on Amazon from France: VAT, margin and FBA pitfalls.

At Hayot Expertise, our review of a PSP for an e-commerce business never stops at the published commission rate. We analyse real net settlement: gross sales, PSP fees (all of them: transaction, FX, instant payout, dispute, refund processing), chargebacks (EUR 15-25 per case at Stripe and Mollie, up to EUR 50 at Adyen on certain schemes), currencies (the hidden FX markup is often the most underestimated line: 2% at Stripe, 1.5-2.5% at Adyen depending on volume), marketplace commissions, collected VAT and cut-off between order, payment and shipment (French PCG article 222-3 on the triggering event).

A PSP can be commercially excellent and accounting-wise mediocre if exports do not rebuild margin by channel. For an e-commerce business, this rebuild is often the difference between visible growth (Shopify revenue) and real profitability (net margin after all fees, refunds and VAT). Our 2026 field matrix by volume: under EUR 500,000 processed revenue = Stripe or Mollie (readable flat fees); EUR 500,000 to EUR 5 million = Stripe with native Pennylane often optimal; above EUR 5 million = Adyen interchange++ generally becomes more competitive, subject to a precise unit cost audit.

The ultimate test we recommend to any CEO before signing: produce on one real month a reconciliation file crossing the e-commerce platform (Shopify, WooCommerce, Magento), the PSP, the bank, invoices issued (French approved platform 2026), credit notes and the VAT return. If this file cannot be built in less than four hours using the PSP native exports, the integration will create structural monthly close debt. This method aligns with our finance digital transformation approach.

On the 2026 regulatory front, the three players comply with PSD2 and SCA. Stripe Payments Europe Ltd operates from Dublin under a Central Bank of Ireland licence, passported across the EU. Adyen N.V. holds a full banking licence from the Dutch central bank (De Nederlandsche Bank, DNB) since 2017 and is listed on the Registre des agents financiers (Regafi) of the French ACPR Banque de France. Mollie B.V. is a DNB-authorised e-money institution. This information is verifiable before any contract on the ACPR Regafi website.

Risk 1: structural gap between platform revenue and accounting revenue. Refunds (average 8-15% in fashion, 3-6% in beauty, 1-3% in grocery), PSP fees, taxes, marketplace commissions and payment delays (T+2 to T+7) create gaps that must be reconciled at the end of each month. Without a written procedure, the cumulative gap can reach 6-12% of revenue in six months on an average e-commerce business, with direct impact on corporate tax, VAT and EBITDA.

Risk 2: misqualified VAT on intra-EU distance sales. Since the EU VAT e-commerce package reform of 1 July 2021 (transposed to article 259 D of the French tax code), a French seller exceeding EUR 10,000 excluding VAT of intra-EU distance sales per year must declare VAT in the country of consumption via the OSS (One-Stop Shop). Stripe Tax and Adyen calculate automatically, but the merchant remains responsible for the declaration. See the detail in our deep dive on IOSS e-commerce VAT obligations 2026 and our complete overview of e-commerce VAT.

Risk 3: French e-invoicing 2026-2027 and confusion with the PSP. The PSP collects payment; it does not issue or receive structured invoices in Factur-X format. Mandatory receipt of electronic invoices by all French companies on 1 September 2026 (2024 finance law, decree no. 2024-266 of 25 March 2024) requires choosing an approved platform (PA) distinct from the PSP. Confusing the two roles is a common mistake in 2026.

Risk 4: SCA compliance and impact on conversion rate. Commission Delegated Regulation (EU) 2018/389 mandates strong two-factor authentication (3DS2) for most EU B2C payments. Misconfigured TRA (Transaction Risk Analysis) exemptions can reduce B2C conversion by 3 to 8 points. All three PSPs offer optimisation tools, but they are not equivalent: Stripe Radar and Adyen RevenueProtect are generally more advanced than the standard Mollie solution.

Risk 5: hidden FX conversion fees. The FX markup above the interbank rate is often the most misunderstood line: Stripe applies 2% as standard, Adyen negotiates by volume (1.5-2.5%), Mollie applies 2.5%. On an e-commerce business with 30% of sales in GBP and USD, the annual impact can reach 0.5-1% of revenue in FX fees not captured by standard commercial ratios.

• What is the annual processed revenue and structure (B2C, B2B, marketplace, subscription)? Under EUR 5 million: Stripe or Mollie; beyond: evaluate Adyen interchange++ with a detailed audit.
• Do you sell outside France (EU, United Kingdom, USA)? Which local payment methods are expected by your buyers (iDEAL, Bancontact, Klarna, BLIK, Apple Pay, Google Pay)? Conversion on a missing payment method can drop 25-40%.
• Who reconciles payments each month and at what level of detail? This person must be able to produce a platform / PSP / bank / VAT / invoice reconciliation in under four hours.
• Which exports will be sent to your accountant and in what format (CSV, native API, Pennylane Pack)? Check compatibility with your accounting software before signing, not after.
• What is your OSS/IOSS VAT exposure and your declaration threshold in 2026? Above EUR 10,000 of intra-EU distance sales, the OSS one-stop shop becomes mandatory.
• Do you need split payments (marketplace) or multi-entity acquiring (group)? All three PSPs cover these needs but with very different pricing and technical models.

• Test a real month with sales, refunds, disputes and fees before full migration. A sales demo does not replace a reconciliation file built from your own data.
• Document accounting treatment: gross sales (account 707), refunds and returns (account 709), PSP fees (account 627 or 6228 depending on doctrine), collected VAT (account 4457), PSP receivables (account 4112), bank (account 512), FX differences (account 666/766).
• Check the PSP listing on the ACPR Regafi before signing: Stripe Payments Europe Ltd (EU passport from Ireland), Adyen N.V. (Dutch credit institution), Mollie B.V. (Dutch e-money institution).
• Check local payment methods outside France: iDEAL in the Netherlands (50% market share), Bancontact in Belgium (60%), Klarna in Nordic countries, BLIK in Poland.
• Reconcile PSP data with Shopify, Amazon, ERP, bank and accounting software (Pennylane, Sage, Cegid). See our Pennylane vs Sage vs Cegid comparison for the target system choice.
• Anticipate the coexistence between PSP + approved e-invoicing platform (PA 2026-2027). The PSP collects, the PA issues and receives structured Factur-X invoices.
• Monitor the chargeback rate: above 1% of disputed transactions (Visa threshold) or 0.9% (Mastercard threshold), the PSP may increase fees or suspend the account (VAMP and MATCH programs).

• international marketplace flows and OSS/IOSS VAT reconciliation
• specialised e-commerce accountant
• IOSS e-commerce VAT obligations 2026
• e-commerce VAT OSS IOSS marketplaces overview
• monthly fast close method
• Stripe PayPal Mollie Klarna fees comparison
• selling on Amazon from France VAT margin FBA
• Pennylane vs Sage vs Cegid comparison
• e-commerce accounting services in Paris 8
• finance digital transformation for SMEs
• outsourced CFO for e-commerce reporting
• specialised e-commerce accountant
• Pennylane to centralise accounting flows

Updated on 17 May 2026. Stripe (1.5% + EUR 0.25 EEA cards), Mollie (1.8% + EUR 0.25 EU consumer cards) and the Adyen interchange++ model were verified on stripe.com/fr/pricing, mollie.com/fr/pricing and adyen.com/fr_FR/pricing in May 2026. Regulatory references (PSD2, SCA, OSS/IOSS, French e-invoicing 2026-2027) must be confirmed against the official texts (Legifrance, BOFiP, EUR-Lex) and each PSP's contractual conditions. Real compliance must be validated with a chartered accountant registered with the French Order of Accountants.