Free · No signup to try

Stop paying invoices that overcharge you

Paste any invoice. In seconds, OverpayGuard checks the math, flags overbilling and missing data, and shows you what AP automation would save. Used by bookkeepers, fractional CFOs, and SMB owners.

Nothing is stored. The audit runs and disappears.

Audit an invoice now

Paste invoice text (vendor, line items, subtotal, tax, total). Try the sample if you don't have one handy.

Want every invoice checked automatically?

Get the free "AP Error Checklist" + early access to OverpayGuard automation. No spam.

Math validation

Line items, subtotals, tax, and totals are re-computed. If an invoice doesn't add up, you see exactly which line is wrong.

Overbilling detection

The #1 silent leak in AP: a qty × unit price that doesn't match the billed amount. We surface it instantly.

Real ROI math

Manual invoice handling runs $12.88–$19.83 and 10–30 min each. See your annual savings at your volume.

Stop paying for errors you can't see

OverpayGuard automation watches your inbox, audits every invoice, flags exceptions for human review, and drafts the accounting entry — so overbilling never slips through.