What is invoice processing?

Invoice processing is the complete workflow from receiving a supplier invoice to recording it in your accounting system and paying it. The steps are: capture the invoice data, verify it against the purchase order and delivery note, route it for approval, post it to the ledger, and execute payment.

How much does invoice processing cost?

Manual invoice processing costs €3–15 per invoice depending on volume and complexity, when you include the labour, approval delays, error correction, and storage. AI bookkeeping tools like Nika process invoices from {price} per invoice — a fraction of the manual cost because the work is automated end-to-end.

Invoice Processing: The Complete Guide for Small Businesses

Invoice processing is the workflow that turns a supplier bill into a paid, recorded transaction: capture, verify, approve, post, pay. It is the single most repetitive bookkeeping task in any business, which makes it the highest-leverage place to automate. This page collects every resource we have on the topic — from beginner glossary terms to cost calculators to tool comparisons.

Guides & walkthroughs

Costs & pricing

Tools & comparisons

Best OfBest AI Tools for Invoices

Mistakes & troubleshooting

Key terms

Compliance by country

Frequently asked questions

What is invoice processing?: Invoice processing is the complete workflow from receiving a supplier invoice to recording it in your accounting system and paying it. The steps are: capture the invoice data, verify it against the purchase order and delivery note, route it for approval, post it to the ledger, and execute payment.
How much does invoice processing cost?: Manual invoice processing costs €3–15 per invoice depending on volume and complexity, when you include the labour, approval delays, error correction, and storage. AI bookkeeping tools like Nika process invoices from {price} per invoice — a fraction of the manual cost because the work is automated end-to-end.