The verdict in three sentences
For a B2B services SME billing 400 monthly contracts, automating recurring billing pays for itself in 4 to 7 months thanks to lower involuntary churn and fewer admin hours. Stripe Billing combined with SEPA direct debit offers the best cost and speed ratio up to roughly 1 million euros of annual recurring revenue. Beyond that, or with complex contracts (tiers, proration, multiple entities), Chargebee or a custom integration at 8,000 to 20,000 EUR excl. VAT becomes relevant.
What manual billing costs today
The typical founder invoices on the 1st of the month from a spreadsheet and accounting software, emails PDFs, then chases payments by hand. On 400 contracts averaging 180 EUR excl. VAT, or 72,000 EUR per month, losses hide in three places: admin time, late payments and customers who leave without deciding to, because a card expired or a transfer was forgotten.
| Indicator (400 contracts, 2026 order of magnitude) | Manual billing | Automated billing |
|---|---|---|
| Billing and dunning hours per month | 38 h | 6 h |
| Average payment delay | 41 days | 4 days (SEPA) |
| Monthly involuntary churn | 2.4 % | 0.6 % |
| Contracts lost per year without a customer decision | 115 | 29 |
| Annual revenue lost to involuntary churn | 20,700 EUR | 5,200 EUR |
| Disputed invoice rate | 3.1 % | 0.8 % |
| Annual admin cost (35 EUR/h loaded) | 15,960 EUR | 2,520 EUR |
Involuntary churn is the most underestimated item. With automated expired-card dunning, payment-method update emails sent 30 days before expiry and smart retry logic, you usually recover 60 to 75 % of these unintended departures.
Tools and fees compared in 2026
Three architectures dominate for a French SME. The choice depends on volume, contract complexity and your existing accounting software.
| Criterion | Stripe Billing + SEPA | Chargebee | Custom (Stripe or GoCardless API) |
|---|---|---|---|
| Software subscription | 0 EUR fixed | 599 USD/month (Performance) | 0 EUR fixed |
| Volume fee | 0.7 % of billed volume | included up to cap, then 0.75 % | 0.7 % with Stripe Billing, 0 % with API only |
| SEPA direct debit fee | 0.35 EUR per transaction | gateway fees (0.35 EUR) | 0.35 EUR (Stripe) or 0.20 EUR + 1 % (GoCardless) |
| European card fee | 1.5 % + 0.25 EUR | gateway fees | 1.5 % + 0.25 EUR |
| Integration cost | 3,000 to 6,000 EUR excl. VAT | 5,000 to 9,000 EUR excl. VAT | 8,000 to 20,000 EUR excl. VAT |
| Go-live delay | 3 to 4 weeks | 4 to 6 weeks | 6 to 10 weeks |
| Proration, tiers, discounts | standard | very advanced | unlimited |
| Accounting connector (Pennylane, Sage) | via API or Zapier | native for several tools | custom-built |
On 72,000 EUR per month paid 90 % by SEPA, the cost per transaction stays very low: 360 debits at 0.35 EUR come to 126 EUR, plus 0.7 % for Stripe Billing, or 504 EUR. The total is around 700 EUR per month including the few card payments. Chargebee adds about 550 EUR fixed but simplifies proration rules and MRR reporting.
The integration project in 6 weeks
A realistic rollout follows a tight schedule. Week 1: audit of the 400 contracts, customer data cleanup (company ID, billing address, EU VAT number). Weeks 2 and 3: configuration of plans, discounts and proration, plus a customer portal where each company signs its SEPA mandate online. Week 4: accounting connector and compliant invoice numbering, anticipating mandatory e-invoicing, which extends to SMEs in September 2027. Week 5: mandate migration and switch-over email campaign. Week 6: first billing cycle run in parallel, then final cutover.
The main risk is mandate collection: plan 3 reminders and a phone call for the slowest 10 % of customers, otherwise they stay on manual transfer for months.
Mini case study
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Thomas, founder of an IT maintenance SME in Nantes, manages 400 contracts at 180 EUR excl. VAT. He picks Stripe Billing with SEPA and a 5,500 EUR excl. VAT integration. Recurring costs: about 700 EUR per month, or 8,400 EUR per year. Annual gains: 13,440 EUR of admin time saved and 15,500 EUR of revenue recovered from involuntary churn, or 28,940 EUR. Net gain in year one: 28,940 - 8,400 - 5,500 = 15,040 EUR. The integration is paid back in just under 3 months of net gains. Unquantified bonus: cash arrives 37 days earlier.
FAQ
Will my business customers accept SEPA direct debit?
Yes, B2B or CORE SEPA mandates are common in recurring services. In practice, 80 to 90 % of customers sign online within 2 weeks if the portal is simple.
At what volume does Chargebee beat Stripe Billing?
Usually beyond 1 to 1.5 million euros of annual recurring revenue or with more than 15 pricing plans. Below that, the 599 USD monthly fee outweighs the functional gain.
How long does it take to recover a rejected payment?
A SEPA rejection arrives within 2 to 5 business days. Automated retries at D+3 and D+7 recover about 70 % of amounts before month end.
Should I plan for French e-invoicing in 2026-2027?
Yes. All companies must be able to receive e-invoices from September 2026, and SMEs must issue them from September 2027. Pick a tool connected to an approved platform, or budget 1,500 to 3,000 EUR excl. VAT for adaptation.
What happens to my current contracts during migration?
They stay on manual billing until the mandate is signed. Running one cycle in parallel keeps the error risk below 1 % of invoices.
Let's scope your project. We price your move to subscription billing (tool, accounting integration, mandate migration), with an indicative budget of 3,000 to 20,000 EUR excl. VAT and a 4 to 10 week timeline. 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.
