The verdict in three sentences
For a services SME in London, collecting payments online rests on two rails: cards for deposits and smaller invoices, and bank payments (Direct Debit or open banking) for recurring and larger invoices. Fees range in 2026 from about 1% to 3.5% depending on the gateway, card origin and payment method, with payouts from T+1 to T+7. The real gain comes from a payment link per invoice connected to accounting, which shortens collection time and removes manual matching.
The main gateways for a UK services business
A finance director who wants to collect training deposits and consulting invoices typically compares Stripe, GoCardless and Adyen. The fees below are 2026 estimates based on public pricing, to be confirmed in your contract: they vary with volume and card mix.
| Gateway or rail | Methods covered | Estimated 2026 fee | Payout time | Watch point |
|---|---|---|---|---|
| Stripe (UK cards) | Cards, wallets, payment links | About 1.5% + 20p | T+2 to T+3 | Very fast to integrate, invoices built in |
| Stripe (EU and international cards) | Cards | About 2.5% to 3.25% + 20p | T+2 to T+3 | Expensive on foreign corporate cards |
| GoCardless (Direct Debit) | Bacs, SEPA, open banking | About 1% + 20p, capped per payment | T+2 to T+5 | Ideal for retainers and instalments |
| Adyen | Cards, wallets, bank methods | Interchange++ plus about EUR 0.11 | T+1 to T+3 | Volume minimums, suited to larger firms |
| Open banking pay by bank | Account to account | 0.5% to 1% or flat fee | Instant to T+1 | Growing adoption, no card fees |
| Standard bank transfer | Faster Payments, BACS | Flat bank fee | Same day to T+3 | Manual matching without unique reference |
For a mixed client base, the most common setup is Stripe for cards and payment links, plus GoCardless for recurring retainers and large invoices.
What integration costs and what it must include
Integration goes beyond a Pay button. A services firm needs a unique payment page per invoice or accepted quote, sent by email or WhatsApp, then each payment pushed back to accounting with the invoice reference. Figures are London market estimates.
| Component | Estimated 2026 range | Timeline | Benefit |
|---|---|---|---|
| Simple payment button on the website | EUR 3,000-4,000 | 2-3 weeks | Collect enrollment deposits |
| Payment page per invoice with unique link | EUR 4,000-5,500 | 3-4 weeks | Reminders with a link, paid in 2 minutes |
| Webhooks and real-time statuses | Included or EUR 800-1,200 | 1 week | Invoice marked paid without keying |
| Automatic reconciliation with Xero or QuickBooks | EUR 1,500-3,000 | 2-3 weeks | No more manual statement matching |
| Full multi-gateway integration | EUR 7,000-10,000 | 5-7 weeks | Cards and Direct Debit on one interface |
If the payment flow is part of a custom client portal or business application, Kolonell's 2026 grid for simple applications runs from 2,500,000 to 4,000,000 FCFA (EUR 3,810-6,100), with maintenance from 35,000 FCFA a month (EUR 50).
Mini case study
Priya, finance director of a training and consulting firm in London, issues 60 invoices a month with an average value of EUR 1,150, about EUR 69,000 a month. Her average collection time is 62 days, and her assistant spends about 25 hours a month matching transfers.
With a payment link per invoice, she targets 40% of value paid online, EUR 27,600 a month. At an average 1.8% fee, the cost is about EUR 500 a month. If collection time drops to 38 days, freed cash reaches about 69,000 / 30 x 24 = EUR 55,200. At an overdraft rate of 9% a year, that avoids roughly EUR 400 of monthly interest, plus 25 hours of matching saved. For a EUR 7,000 integration, the project pays back within a few months.
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FAQ
Do we need separate accounts for cards and Direct Debit?
Usually yes: Stripe or Adyen for cards and GoCardless for Direct Debit, although Stripe also offers Bacs Direct Debit. Running both often lowers the blended fee by 0.5 to 1 point.
How do we reconcile payments automatically?
Each payment link carries the invoice reference, and the gateway webhook updates the status in real time. Native connectors to Xero or QuickBooks then remove 80 to 90% of manual matching.
Can we collect from clients abroad?
Yes, by card with fees of about 2.5 to 3.25% for international cards, or through SEPA Direct Debit for euro clients at around 1%. For large amounts, a bank transfer with a unique reference remains cheaper.
Are fees negotiable?
Above roughly EUR 80,000 of monthly volume, most gateways will discuss custom or interchange++ pricing. Three months of volume history makes negotiation easier.
How long until we are live?
Allow 1 to 2 weeks for merchant onboarding and KYC, then 3 to 7 weeks of integration depending on scope.
Let's scope your project. Describe your invoice volume, target payment methods and accounting software, and we will price the integration, indicative budget and go-live date. 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.
