The verdict in three sentences
For an SME, the true cost of online payments breaks down into three items: per-transaction fees (1.4 to 2.9 %), technical integration (EUR 3,000 to 12,000) and PCI-DSS compliance. In 2026, a modern card platform integrates in 2 to 5 weeks and pays off once monthly sales exceed EUR 8,000 to 12,000. The trap is not the headline rate but the fixed fees, settlement delays and the hidden cost of unpaid invoices.
What accepting payments online really costs
The commercial rate is the visible part. A director must add initial integration, monthly platform fees and maintenance. Here is the 2026 order of magnitude.
| Line item | 2026 order of magnitude (EUR) | Frequency |
|---|---|---|
| Technical integration (dev + tests) | 3,000 - 12,000 | One-off |
| Card transaction fee | 1.4 % - 2.9 % + 0.25 EUR | Per sale |
| Platform subscription | 0 - 90 / month | Monthly |
| PCI-DSS compliance (SAQ A) | 0 - 1,500 / year | Annual |
| 3-D Secure 2 (usually included) | 0 - 800 | One-off |
| Maintenance & updates | 600 - 2,400 / year | Annual |
An SME selling 300 orders/month at EUR 80 pays roughly EUR 480 to 700 in transaction fees per month, excluding integration. That figure, not the nominal rate, drives the decision.
2026 solutions comparison
The choice depends on the profile: volume, share of international, need for B2B deferred payment. The table below compares the main families for an SME.
| Criterion | Stripe / card | Local PSP (Payplug, Mollie) | SEPA transfer |
|---|---|---|---|
| Transaction fee | 1.4 - 2.9 % + 0.25 EUR | 1.2 - 2.4 % + 0.25 EUR | 0 - 1 EUR fixed |
| Settlement delay | 2 - 7 days | 1 - 3 days | 1 - 2 days |
| Integration | 3,000 - 8,000 EUR | 2,500 - 7,000 EUR | 1,500 - 4,000 EUR |
| 3-D Secure 2 | Included | Included | N/A |
| International | Excellent | Medium | SEPA zone |
| B2B unpaid handling | Weak | Weak | Manual |
For a consumer e-commerce store facing international markets, cards remain essential. For B2B with high invoices, pairing card and SEPA transfer slashes the fee bill.
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Mini case study
Claire, CFO of an industrial SME in Lyon, wants to accept spare-parts orders online. Target volume: 250 orders/month at EUR 140, or EUR 35,000 monthly revenue. With a card solution at 1.8 % + 0.25 EUR, fees come to 35,000 x 1.8 % + 250 x 0.25 = 630 + 62.50 = EUR 692.50/month. Integration costs her EUR 6,500 once. By routing 40 % of revenue to SEPA transfer (nearly free), she saves about EUR 252/month, returning the integration in 26 months on fees alone, before counting conversion and cash-flow gains.
FAQ
What does payment integration really cost in 2026? Expect EUR 3,000 to 12,000 depending on complexity (simple single-card vs multi-method with deferred payment). A standard module on an existing CMS sits closer to EUR 3,000 to 5,000.
Is Stripe always the cheapest? No. On high volume or high baskets, a local PSP can drop to 1.2 % and settle faster. The right choice depends on monthly volume and share of international sales.
Must I be PCI-DSS certified? If you never store card numbers and use a provider-hosted page (SAQ A), compliance is light and often free. Storing cards triggers costly audits best avoided.
How fast can we go live? Expect 2 to 5 weeks for a standard integration: account setup, development, 3-D Secure testing and acceptance. Multi-method or multi-currency cases take 6 to 8 weeks.
When does online payment become profitable? Once volume exceeds EUR 8,000 to 12,000/month, fees stay below the cost of manual collection (reminders, cheques, data entry). Above EUR 30,000/month, optimizing payment methods becomes a real margin lever.
Let's scope your project. Share your monthly volume, average basket and international share, and we will price the integration and full fee cost. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
