Three people each handling 400 supplier invoices a month at 12 minutes each, with 18% hitting an exception, costs about $120,000 a year in staff time, or $8.23 an invoice. APQC’s cross-industry median is $6.00; Ardent’s survey average, systems included, is $9.84.
Your AP staff spend about 3,744 hours ($118,565) a year on 1,200 supplier invoices a month, at 12 minutes each with 18% hitting an exception. An agent that takes over 70% of the hands-on work gives back about 2,381 hours ($75,395) a year.
- Staff hours, per year: 3,744
- Hours per person, per month: 104
- Full-time staff it takes: 1.8
- Of those, hours on exceptions: 864
- Cost per supplier invoice: $8.23
- Hours back with an agent, per year: 2,381
- Staff cost back with an agent, per year: $75,395
How the number is worked out.
The model counts hands-on minutes: receiving the invoice, keying or checking it, coding it, matching it to the order and the receipt, routing it for approval, posting it. Software and the payment itself are left out; add them before comparing with the all-in benchmarks.
- 01Invoices a year. People times invoices per person per month times twelve. Ardent’s respondents report 57% of suppliers able to send electronically; the rest arrive as PDFs and paper, which take longer.
- 02Minutes each. First time through, no problems: 12 minutes. Ardent’s $9.84 all-in average at a loaded bookkeeper wage works out to about 19 minutes, with systems included. The default is lower because it counts labor only.
- 03Exceptions. Ardent found 18.4% of invoices hit an exception: a price or quantity that does not match the order, a missing PO, a duplicate, an approver who is away. The default reworks 18% at 20 minutes each.
- 04What the time costs. Hours times the hourly wage plus 30% for benefits and overhead. The wage default is the federal median for bookkeeping and accounting clerks.
- 05What automation leaves. An agent that reads the invoice, codes it, matches it and routes it takes over 70% of the minutes. A person still approves each invoice and handles the real exceptions, and the model counts that time.
The defaults.
Dials you change are marked in colour. The last column says where each default comes from and what kind of source it is.
| Dial | Yours | Default | Where the default comes from |
|---|---|---|---|
| People processing invoices | 3 | 3 | JRW, 2026 Our default |
| Supplier invoices per person per month | 400 | 400 | JRW, 2026 Our default |
| Minutes per invoice: capture, code, match, route, post | 12 | 12 | JRW, 2026 Our default |
| Invoices that hit an exception | 18% | 18% | Ardent Partners, 2025 Survey |
| Minutes per exception | 20 | 20 | JRW, 2026 Our default |
| Hourly wage of the people processing | $24 | $24 | US Bureau of Labor Statistics, Occupational Outlook Handbook, 2025 Official |
| Benefits and overhead on top | 30% | 30% | JRW, 2026 Our default |
| Hands-on time an agent takes over | 70% | 70% | JRW, 2026 Our default |
| Human review per item after automation | 1 | 1 | JRW, 2026 Our default |
Sources.
APQC’s measured median and Ardent’s survey carry the benchmarks; the exception rate is Ardent’s. The wage is federal data.
Our defaults. At the defaults the cost per invoice lands at $8.23, between APQC’s $6.00 median and Ardent’s $9.84 average. We put the agent’s share at 70% because the exceptions that remain are the ones that need a phone call. How we set defaults.
- JRW default. JRW, 2026. No public benchmark we trust. The number is a round figure in the range we see in engagements, chosen so the headline errs low. Replace it with your own. Source
- The State of ePayables 2025. Ardent Partners, 2025. Sponsored analyst survey of AP and finance leaders, sponsor not disclosed: average all-in cost $9.84 per invoice, 8.2 days to process, 18.4% of invoices hit an exception, 57% of suppliers can submit electronically, 21.9% of staff time spent on supplier inquiries. Best-in-class teams are reported at 79% lower cost and 79% faster; secondary reports give $2.65 against $12.42 for everyone else. Respondents report their own costs, which run higher than APQC's measured median. Source
- Bookkeeping, accounting and auditing clerks, median pay. US Bureau of Labor Statistics, Occupational Outlook Handbook, 2025. Median pay $24.36 an hour, $50,670 a year, May 2025. Before benefits and overhead. Source
Also consulted
- What is the average cost to process an invoice?. APQC Open Standards Benchmarking, 2026. Cross-industry median $6.00 per invoice across 5,846 organizations: total cost of the accounts payable process, personnel, systems, overhead and outsourcing, divided by invoices processed. Top and bottom quartiles are behind membership. Mostly larger organizations. Source
Where the minutes go.
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Capture and coding
Reading the PDF or the email, keying the header and lines, picking the GL code and the department. The agent reads the invoice however it arrives, codes it from history and the PO, and raises the ones it is not sure about. How we automate accounts payable.
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Matching and exceptions
Checking the invoice against the order and the receipt. Mismatches, duplicates and missing POs are the 18%. The agent matches what matches and sends a person only the differences, with the evidence attached.
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Approval and posting
Routing to the approver, chasing them, posting to the accounting system, scheduling the payment so you catch the early-payment discount and avoid the late fee.
The same agent handles the other side of the ledger. What late-paying customers cost.
Questions.
- Why is our cost different from $9.84?
- Ardent’s figure is all-in: people, software, overhead, reported by the respondents themselves. APQC measures the same total and gets a $6.00 median across 5,846 mostly large organizations. This calculator counts labor only, and at the defaults that already comes to $8.23 an invoice. Add your AP software per invoice if you want the all-in number.
- What counts as an exception?
- Anything that stops the invoice going straight through: a price or quantity that does not match the PO, no PO at all, a duplicate, a missing receipt, an approver who has not answered. Ardent’s respondents put it at 18.4% of invoices.
- Does this include paying the invoice?
- No. Payment runs, remittances and bank fees are separate. The model stops at posted and approved.
- Is 400 invoices a month a lot for one person?
- That is a small business’s volume. A 20-person company might see 100; a distributor 2,000. The ratio that matters is minutes per invoice, which the dial sets.
“Copy a link” puts your dials in the address, and we store nothing. A browser agent that supports WebMCP can run this calculator as estimate_invoice_processing_cost. How the calculators work.
Want the invoices matched before anyone reads them?
Tell us your accounting system and how your invoices arrive, and we’ll show you which steps an agent can take over. Fixed price per automation. If the first one misses the scope we agreed, you don’t pay.
Book a call (opens in a new tab)Related: Accounts payable statistics · Late invoice cost · Late invoices: how to get paid sooner · Accounts payable automation