The most common comparison isn't between two software tools — it's between using any tool at all versus continuing to handle invoices manually. Here's the honest cost comparison.
| Factor | Manual processing | InboxBill |
|---|---|---|
| Time per invoice | 3–5 minutes | 20–40 seconds (review only) |
| 50 invoices/month | ~4 hours | ~25 minutes |
| Error rate | 1–4% (data entry errors) | <0.5% (AI + human review) |
| Due dates missed | Regularly (buried in email) | Never (extracted and tracked) |
| FreeAgent sync | Manual re-entry | Automatic |
| PDF filing | Manual, inconsistent | Automatic, every invoice |
| Monthly cost | Staff time at £25–40/hr | £15–29/month + ~30min staff time |
| Duplicate detection | None (human error) | Automatic |
At 50 invoices per month and £30/hour labour cost, manual processing costs ~£120/month in staff time alone. InboxBill at £29/month plus 25 minutes of review time costs ~£40/month total — a 67% saving, plus the error rate drops dramatically.
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