Full cost components of a payment integration: 1) Transaction fee — 1.5% + NGN 100 per transaction (Paystack Nigeria). 2) Engineering time — initial integration (2-4 weeks), ongoing maintenance (4-8 hours/month). 3) Chargeback losses — typical 0.1-0.5% of volume; each dispute takes 2-3 hours of staff time. 4) Settlement lag cost — money locked in transit for T+1 to T+2 represents a working capital cost if you operate on thin margins. 5) Fraud losses — typically 0.1-0.3% for well-managed integrations. 6) Compliance — PCI SAQ completion, NDPA/DPA registration, VAT registration. Transaction fees are a small fraction of total payment cost at scale.
| Cost Component | Estimate | Note |
|---|---|---|
| Transaction fee (Paystack Nigeria) | 1.5% + NGN 100, cap NGN 2,000 | On NGN 10M/month volume ≈ NGN 195,000 |
| Initial integration engineering | 2-4 weeks senior developer time | At NGN 250,000/month salary ≈ NGN 125,000-250,000 one-time |
| Ongoing maintenance | 4-8 hours/month | Webhook fixes, API updates, edge case handling |
| Chargeback losses | 0.1-0.5% of volume | Includes lost product + refund + dispute fee if any |
| Fraud losses | 0.1-0.3% of volume | Fraudulent transactions that clear before detection |
| Settlement lag capital cost | T+1 to T+2 lag × volume × opportunity cost rate | At NGN 10M/month, 2-day lag = NGN 667K locked; at 15% annual rate ≈ NGN 8,000/month |
| Compliance (NDPA, VAT) | NGN 50,000-200,000/year | Legal fees for registration; accountant for VAT remittance |
| Payment failure rate | 3-8% of attempts | Failed transactions are not direct costs but represent lost revenue |
At NGN 10M/month volume, total cost is roughly NGN 350,000-500,000/month (3.5-5%), compared to the 1.5% transaction fee alone. The gap is maintenance, losses, and capital costs.
See total cost of ownership: gateway fees vs engineering time for the comparison framework across multiple gateways.
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