The verdict in three sentences
Adding online payments to a Berlin SME's site is budgeted at 3,000 to 9,000 EUR in 2026 (Stripe, SEPA transfer, installment payment). Subscriptions and recurring payments add 4,000 to 10,000 EUR, and per-transaction fees run around 1.4% + 0.25 EUR with Stripe. The real challenge isn't charging but being compliant (3-D Secure, PCI-DSS) and cleanly reconciling every payment.
What a payment integration covers
A payment integration isn't just a button: it's handling webhooks, failures, refunds, 3-D Secure and accounting reconciliation. Here is the 2026 order of magnitude by scope.
| Scope | Contents | 2026 cost (EUR) |
|---|---|---|
| Simple card payment | Stripe/Checkout, 3-D Secure, webhooks | 3,000 - 5,000 |
| SEPA / on-receipt transfer | Matching, statuses | 2,000 - 4,000 |
| Installment payment | Provider, schedule handling | 2,500 - 5,000 |
| Recurring subscriptions | Cycles, dunning, retries | 4,000 - 10,000 |
| Accounting reconciliation | Export, matching, invoices | 2,000 - 6,000 |
| Multi-currency | EUR/USD/GBP, rates | 2,000 - 4,000 |
A well-done simple card scope starts at 3,000 EUR; add recurring + reconciliation and you exceed 12,000 EUR.
Per-transaction fees compared
Beyond the build, per-payment fees weigh on margin. Here are the 2026 orders of magnitude for a 90 EUR average basket.
| Solution | 2026 fee | Cost on 90 EUR |
|---|---|---|
| Stripe (EU card) | 1.4% + 0.25 EUR | ~1.51 EUR |
| Stripe (non-EU card) | 2.9% + 0.25 EUR | ~2.86 EUR |
| Installments (provider) | 2 - 4% merchant | 1.80 - 3.60 EUR |
| SEPA transfer | 0 - 0.35 EUR fixed | ~0.35 EUR |
| PayPal | 2.49% + 0.35 EUR | ~2.59 EUR |
On 1,000 orders/month at 90 EUR, shifting share from PayPal to Stripe + SEPA can save several hundred euros a month.
Mini case study
Julien, head of a professional-furniture SME in Berlin, takes 850 orders/month at a 120 EUR average basket via PayPal (2.49% + 0.35 EUR), i.e. ~2,838 EUR/month in fees. By moving 60% of volume to Stripe (1.4% + 0.25 EUR) and 20% to SEPA transfer, his fees drop to ~2,050 EUR/month: ~790 EUR/month saved, or 9,480 EUR/year. His 6,500 EUR integration pays back in under 9 months.
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FAQ
What does a basic payment integration cost?
From 3,000 to 5,000 EUR for card payment with 3-D Secure and reliable webhooks, excluding recurring subscriptions.
Do I have to handle PCI-DSS compliance myself?
No if you use Stripe Checkout or Elements: card data never touches your server, which greatly lightens the PCI-DSS scope.
How long to go live?
Between 2 and 5 weeks depending on the number of payment methods and reconciliation complexity.
Are installment payments worth the fees?
Their 2 to 4% merchant cost is often offset by a higher average basket and better conversion on large amounts.
How do I make reconciliation reliable?
By processing webhooks idempotently and auto-exporting to accounting: 2,000 to 6,000 EUR well spent to avoid discrepancies.
Let's scope your project. Tell us your target payment methods, monthly volume and accounting tool: we'll price the integration and reconciliation. 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.
