The verdict in three sentences
A deposit + installment system on B2B quotes costs between EUR 6,000 and 18,000 to integrate in 2026, including schedules, dunning and reconciliation. Expect 4 to 7 weeks and EUR 250/month of support. The payback shows on two lines: +10 to +20% signature rate on large quotes and a lighter working capital need from the moment the deposit clears.
What the integration covers
A B2B installment system is not a simple pay button: it is a scheduling engine wired into your billing.
| Module | 2026 range | What it delivers |
|---|---|---|
| Deposit on signature | EUR 6,000 - 9,000 | Immediate partial collection |
| N-installment schedule (3-12) | +EUR 2,000 - 4,000 | Automatic spreading |
| Automated dunning | +EUR 1,500 - 3,000 | Fewer unpaid invoices |
| Accounting reconciliation | +EUR 2,000 - 4,000 | Auto matching, export |
| Client portal (schedule tracking) | +EUR 2,500 - 5,000 | Client self-service |
The deposit-only core starts at EUR 6,000; the full version with schedule, dunning and reconciliation reaches EUR 18,000. The reconciliation brick is the one that saves finance the most time.
Quantified business impact
| Metric | Without installments | With deposit + N-pay |
|---|---|---|
| Signature rate (quotes > EUR 5,000) | 32% | 38 - 42% |
| Average collection delay | 45 - 60 days | 8 - 15 days (deposit) |
| Bad-debt rate | 4 - 6% | 1.5 - 3% |
| WC on a EUR 30,000 project | EUR 30,000 fronted | EUR 9,000 (30% deposit taken) |
| Manual chasing cost | 2-3 h/case | near zero (auto) |
Taking a 30% deposit transforms working capital: on a EUR 30,000 project you front EUR 21,000 instead of EUR 30,000. Across 40 projects/year, that frees several hundred thousand euros of cash.
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Mini case study
Lars runs a B2B fit-out SME in Amsterdam, signing 50 quotes/year between EUR 8,000 and 40,000. Chosen build: 30% deposit + 3-installment plan + dunning + reconciliation, EUR 13,500, delivered in 6 weeks, EUR 250/month support. Effect: signature rate from 33% to 40% (about 10 extra signed quotes, avg EUR 18,000 = EUR 180,000 potential added revenue), and average collection delay cut fourfold. Even counting only lower bad debt (5% to 2.5% on EUR 900,000 revenue), annual savings top EUR 22,000: the build pays back within year one.
FAQ
Does B2B installment payment need a license? If you spread payments yourself without a credit provider, it is a simple commercial schedule: no license. If you use a B2B BNPL provider, they carry the risk and the license.
How long to deploy? Roughly 4 to 7 weeks depending on the number of modules (deposit-only is faster; the full version with reconciliation takes longer).
What lift on signature rate? In B2B on large quotes, the observed order of magnitude is +10 to +20%, because the deposit removes the client's cash-flow objection.
How are missed installments handled? The dunning module retries automatically (email, SMS, card retry) and can pause the project if an installment fails; bad debt often drops below 3%.
Does it connect to my billing software? Yes, via API or export: reconciliation auto-matches installments to your invoices (Exact, Xero, QuickBooks, custom).
Let's scope your project. Tell us your quote volume, average deal size and desired deposit rules; we will price the core plus the modules that matter with an indicative budget. 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.
