AI agents for finance · Part 1 of 14
How to set up an AI agent for accounts payable
What an AP agent does between the invoice and the payment, the path each invoice takes, how far today’s agents go on their own, and the setup, part by part.
The short version
An AI agent for accounts payable reads each supplier invoice, checks the supplier, codes the lines and matches them to the order, so a bill is ready for someone to approve. Approving and paying are separate steps, and the agents read for this guide prepare far more than they pay. Check the supplier before anything else, keep approval and the release of money with people until your own results say otherwise, and set up the rest part by part.
One invoice’s path
Accounts payable turns a supplier’s invoice into a payment. Take Example Software, an invented company with a finance team of three. Its invoices arrive in one shared inbox, its accounting system holds the suppliers, the purchase orders and the ledger, and its bank sends the payments. An agent can do most of the preparing, and every invoice takes the same path.
Preparing the bill: a mistake can still be corrected
1 Receive
each invoice, by email or upload
2 Read
supplier, amounts, lines, dates, bank details
3 Check the supplier
supplier recordsA known supplier? Bank details as on file? Paid already?
Any no: to a person first.
4 Code and match
GL account, cost center; then the order and what was received
Approving and paying: a mistake may not come back
5 Approve
by your policy: who signs for this amount
6 Schedule
the date, by the supplier’s terms
7 Pay
in the payment run, from your bank
8 Record
what was done, by whom, and why
Put the supplier check before the coding. A coded, matched bill looks ready, and the questions that matter most are about who gets paid: a supplier you’ve never paid, bank details that differ from the ones on file, or an invoice you’ve already paid. Any of those goes to a person before anything else happens. Part 5 covers the supplier records, and part 9 changed bank details.
How far today’s agents go
The agents on sale differ in where they hand back to a person. So read each vendor’s own pages and place its agent on the same four steps: reading the invoice, preparing the bill, approving it and paying it.
Business Central
Microsoft’s Payables Agent
- Reads
- the agent: PDFs sent by email
- Prepares
- the agent: a draft, not posted
- Approves
- your workflow, separate from it
- Pays
- a person, outside the agent
Ramp
AP agents
- Reads
- Ramp’s OCR, on each invoice
- Prepares
- the agent codes line by line
- Approves
- the agent suggests, approvers decide
- Pays
- the agent, for card-eligible bills
To start
Example Software, an invented company
- Reads
- the agent reads each invoice
- Prepares
- the agent: a draft for review
- Approves
- the approver, per your policy
- Pays
- a person releases the run
One line on Microsoft’s page is worth reading before any setup, because it holds for every product:
“Review confirmation in the agent task is separate from a Business Central approval workflow.”
Microsoft Learn, “Payables Agent Frequently Asked Questions”Confirming an agent’s draft tells the agent to carry on. It doesn’t approve the payment. So keep your approval policy where your accounting system or AP platform applies it to every bill, whoever prepared it. Part 4 writes that policy, and part 12 widens what the agent does alone, one step at a time.
Setting it up, step by step
The shape matches the support series (its part 1) and the GTM series (its part 1). What changes is the end of the path: every invoice ends in a payment, and money that has left is harder to get back than a draft is to fix. Every step below has a part of its own.
Write your approval policy for it
Who approves what, at which amount, in words an agent can follow.
Get supplier records you can trust
Bank details, tax IDs and duplicates, before the first invoice.
Connect your accounting system, bank and inbox
Read-only first, then one permission at a time.
Let it read, code and match
Invoices against the order and what was received.
Write the payment rules
Approval limits, duplicates and payment terms.
Handle changed bank details
Pay only after a named person confirms.
Hand exceptions to a person
What goes to the controller, and with what context.
Test it
On last quarter’s invoices, before it touches this month’s.
Roll it out
From suggested payments to sent ones, with separate people preparing and approving.
Measure it
Cost per invoice, invoices nobody touched, exceptions, discounts taken.
Keep the record
So you can say why it paid each invoice.
Next in this series
Part 2: what an AI agent can and can’t do in accounts payable. See all 14 parts.
Sources
- Microsoft Learn, “Payables Agent Frequently Asked Questions”, dated 2 October 2026, read on 25 October 2026.
- Ramp, “Accounts Payable Software”, read on 25 October 2026.
- Ramp, “What are the best practices for using AI agents in accounts payable?”, 3 November 2025, read on 25 October 2026.