The verdict in three sentences
The technical integration of online payment for an SME in Montreal costs between EUR 1,500 and EUR 12,000 in 2026, depending on the number of payment methods and the level of automatic reconciliation. On top of that come fees of 0.9 to 2.5 % + EUR 0.25 per transaction, often the heaviest cost over time. The real profitability lever is not the sticker price but the 3DS authorization rate and automated accounting reconciliation.
What a payment integration actually covers
Wiring a pay button takes a day. What costs money is serious B2B payment: handling failures, retries on expired cards, partial refunds, installment payment, SEPA transfers, and above all reconciling receipts with your invoices. A rushed integration generates hours of manual matching every month.
| Integration item | Complexity | 2026 cost (EUR) |
|---|---|---|
| Hosted checkout (redirect) | Low | 1,500 - 3,000 |
| Embedded payment + tokenization | Medium | 3,000 - 6,000 |
| 3D Secure 2 & anti-fraud | Medium | 1,500 - 4,000 |
| Installment / scheduled payment | High | 3,000 - 7,000 |
| Automatic accounting reconciliation | High | 4,000 - 10,000 |
| Webhooks & dispute handling | Medium | 2,000 - 5,000 |
Comparing 2026 payment providers
The choice of PSP (payment service provider) weighs as much as the integration itself, because fees run on every sale. Here are 2026 orders of magnitude for a Montreal SME.
| Provider | Card fee EU | Fixed fees | Strengths |
|---|---|---|---|
| Stripe | 1.5 % + 0.25 EUR | no subscription | Rich API, docs, international |
| Adyen | 0.9 % + 0.11 EUR | volume tiers | Large volumes, authorization rate |
| Mollie | 1.8 % + 0.25 EUR | no subscription | Simplicity, local EU methods |
| PayPlug | 1.2 - 2.5 % + 0.25 EUR | from EUR 0 | SMEs, local support |
| SEPA transfer (via PSP) | 0.20 - 0.50 EUR fixed | 0 | High-value B2B |
For high-basket B2B, steering large customers toward SEPA transfer cuts fees tenfold versus card. A mix of card for small orders and transfer for large ones is often the most profitable setup.
Mini case study
Sophie, CFO of a trading SME in Montreal, collects EUR 320,000 a month, 80 % by card at 1.8 %, i.e. EUR 4,608 in monthly fees. Her team also spends 12 hours a month matching receipts to invoices. By integrating Adyen at 0.9 % for EUR 9,000 and moving orders over EUR 2,000 to SEPA transfer, she brings fees down to about EUR 1,900 a month and automates 90 % of reconciliation. Combined saving: over EUR 3,000 a month, project paid back in under 4 months.
FAQ
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
What is the real monthly cost of online payment?
The dominant cost is not integration but the fee: on EUR 100,000 of card sales at 1.8 %, you pay EUR 1,800 a month. Negotiating the rate or steering to transfer has more impact than saving on integration.
Does 3D Secure hurt conversion?
3DS2 with frictionless authentication lets 90 to 95 % of transactions through without an extra step. Well configured, it cuts fraud and unpaid invoices without breaking the conversion rate.
Can we take installments in B2B?
Yes, via split-payment or scheduled solutions; plan EUR 3,000 to 7,000 of integration. It lifts conversion on large baskets by 8 to 15 %.
How long to integrate a payment?
A hosted checkout wires up in 1 to 2 weeks. A full integration with reconciliation and anti-fraud takes 4 to 8 weeks including sandbox testing.
Do we need PCI-DSS compliance?
Using a hosted checkout or the PSP's tokenization, you fall under the SAQ-A questionnaire, the lightest level. You avoid storing card data and most of the compliance cost.
Let's scope your project. Give us your monthly volume, your average basket and your target payment methods: we'll price the integration and reconciliation that fit. 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.
