The accounts payable workflow covers everything between receiving a supplier's invoice and paying it: capturing the invoice, checking it, getting it approved, authorizing the payment and sending the money. Done well, it keeps cash flow predictable and suppliers happy. Done by hand, it produces lost invoices, late fees, duplicate payments and an inbox nobody wants to own.
This guide walks through each step, explains what changes when you automate it and lists the problems that tell you the workflow needs attention. It is written for accounts payable managers, controllers and anyone setting up invoice processing for the first time.
What are the steps in the accounts payable workflow?
Every accounts payable team follows the same basic sequence, whether by hand or with software. Automation removes the repetitive work in each step and builds in the control points controllers and finance leaders rely on.
1. Invoice capture
How you capture an invoice depends on how it arrives. Paper and fax invoices are keyed in or scanned. Emailed invoices can go to one shared mailbox, where automation picks them up, reads them and creates a record with every field you need. Supplier portals let vendors submit invoices directly as data.
2. Invoice approval
Once captured, the invoice needs approval for payment. If it references a purchase order, it is matched against the order, and against the goods receipt in a three way match. A match within tolerance moves on. A mismatch goes into an exception workflow for investigation.
Invoices without a purchase order need a person to confirm the purchase. In a manual process that means walking paper around the office or chasing emails. An automated system routes each invoice to the right approver based on your rules and sends reminders when it stalls. See invoice approval best practices.
3. Payment authorization
Approval says the invoice is valid. Authorization says the company will pay it now. Accounts payable usually prepares a payment run, a batch of approved invoices due in a period, for the controller or finance leader to authorize. Manually, that means gathering printouts and supporting documents. With automation, batches queue up for the right authorizer, and scheduling can follow your cash management policy, for example paying early where a discount applies.
4. Payment execution
Payments go out by check, bank transfer, virtual card or other methods. Without automation, even electronic payments involve logging into banking portals, entering each payment and recording it again in the accounting system. Automated payment files and integration with your bank and enterprise resource planning system remove the double entry.
5. Supplier management
Supplier management runs through every step. Suppliers want to know whether their invoice arrived, whether it was approved and when they will be paid. A supplier portal answers those questions without a phone call, and a controlled onboarding process keeps supplier and bank details accurate. See Onboardingflow.
Why does managing the workflow matter?
A bottleneck or error at any step leads to late payments, duplicate payments, higher costs and wasted time. It also affects your supply chain, because suppliers who are paid late may prioritize other customers or tighten terms.
A well managed workflow does the opposite. It handles growing volumes without more staff, captures early payment discounts, reduces risk and makes fraud harder.
It also gives finance leaders control points they can rely on: approval limits by role, segregation of duties between entering an invoice and releasing a payment, verified changes to supplier bank details and a full audit trail. Those controls are hard to enforce when the workflow lives in email, and simple to enforce when it lives in a system.
What problems show your workflow needs attention?
| Problem | What causes it | What fixes it |
|---|---|---|
| Missing invoices | Invoices sent to individuals or many inboxes | One capture point for every channel |
| Data entry errors | Manual keying of fields | AI extraction with human review of exceptions |
| Volume spikes | Fixed team, variable invoice volume | Touchless processing for clean invoices |
| Lost paper | Physical filing | Digital storage linked to the invoice record |
| Duplicate invoices | Slow processing prompts suppliers to resend | Duplicate detection before approval |
| Overbilling | Purchase order match only | Checking invoice lines against contract terms |
One manufacturer that runs on ServiceNow, T.D. Williamson, used to handle invoices across several email inboxes by hand, which led to duplicate payments and long approval cycles. Moving to Invoiceflow let the team automate invoice coding and approval workflows. Read more in our case studies.
What does an automated workflow look like?
In an automated workflow, people handle judgment and the system handles routine:
- Invoices arrive by email, portal or scan and land in one queue.
- AI extracts header and line item fields from any layout.
- The invoice is matched against the purchase order, goods receipt and contract terms.
- Clean invoices route for approval automatically. Exceptions go to the buyer or contract owner with the reason.
- Approved invoices join a payment run for authorization.
- Payments go out, are recorded and the supplier sees the status in the portal.
Every step is logged, so auditors can see who approved what and when.
How should you start improving the workflow?
Map your current workflow first, including every inbox and spreadsheet involved. Measure a baseline: days from receipt to approval, exceptions by cause, duplicates found and discounts missed. Then automate the step that causes the most delay, usually capture and matching, and measure again before moving to the next.
The bottom line
The accounts payable workflow is five steps, and each one can stall. Capture every invoice in one place, match it against orders and contracts, route approvals by rule and keep suppliers informed, and the workflow becomes fast, controlled and auditable.