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Finance and accounting
Free accounts payable software: pay the right supplier the right amount once
Accounts payable is where good procurement ends and bad habits cost real money. Free tools can record bills and schedule payments. Controls keep duplicate and fraudulent payments out.
The short answer. You can run accounts payable for free using accounting software with bill entry, open source ERPs or a spreadsheet. Free options rarely include invoice capture, automated three way matching, approval routing by policy or supplier portals. Add controls first: a vendor master with checks, segregation of duties and payment run reviews.
Written by Procurement VMS Editorial Team · Reviewed by Michael, Procurement Advisor Expert · Updated
AP is a control function wearing an admin costume
Bills arrive, someone enters them, someone pays them. That description hides the point. Every payment is a chance to pay the wrong person, the wrong amount or twice. The job is as much about stopping bad payments as making good ones.
Software can enforce checks, but it cannot invent them. Write them down first, and our invoice approval workflow and invoice approval and GRN guide give you a structure.
What free AP tools handle
- Usually covered: bill entry, supplier records, due dates, payment status, aged payables reports.
- Often missing: invoice capture and OCR, automated matching, approval routing by amount, duplicate detection and early payment discount tracking.
- Rarely free: payment execution with controls, supplier portals, bank file formats for your country and audit logs.
Understand terms before you schedule payments. Our pages on payment terms, 2/10 net 30, net 45 and net 60 show what discounts and deadlines mean, and the days payable outstanding calculator tracks the result.
Free routes worth testing
| Option | Type | Who runs it | Best for | Watch for |
|---|---|---|---|---|
| Accounting software bills | Feature | Vendor | Small firms already on a cloud accounting tool | Basic approvals and capture |
| ERPNext or Odoo Community | Open source suite | You or a partner | Firms wanting purchase, receipt and bill matching in one system | Setup effort, and OCR needs add-ons |
| Akaunting | Open source accounting | You or vendor | Small firms wanting bills and payments in an open source app | Some features are paid apps; check what you need |
| Free plan from a cloud vendor | Free plan | Vendor | Small teams who want bill capture without setup | Invoice caps, limited approvals and fees on payments |
| Spreadsheet payment log | Process | You | A handful of bills a week | No duplicate detection, easy to alter |
Accounting software bills
Most accounting products support bills, due dates and payment recording. Check how approval and duplicate checks work.
ERPNext or Odoo Community
Purchase invoices link to orders and receipts, which supports matching.
Akaunting
Open source accounting with bills, vendors and payments. Confirm which modules are free.
Free plan from a cloud vendor
Some AP tools offer a free tier. Read the live limits and the payment fee schedule.
Spreadsheet payment log
Keep a log with invoice number, supplier, amount, due date, approver and payment date.
Free download
Get the free accounts payable software scorecard and checklist
An Excel scorecard that scores up to four options against the criteria on this page, plus a one-page PDF checklist of upgrade triggers. Free, and ready the moment you submit the form.
- Excel scorecard with weights you can change and totals that update
- PDF checklist: the questions to ask before you commit and the signs it is time to pay
- No account, and no sales call unless you ask for one
Five controls that cost nothing
A clean vendor master
One record per supplier, with verified bank details and tax documents such as a W-9 where required. Changes need a second person and a call back to a known number.
Separate duties
The person who creates a vendor, the one who approves invoices and the one who releases payment should differ. In a team of two, add a monthly review by an owner.
Match before you pay
Check invoice against order and receipt. The purchase order approval workflow and goods receipt workflow feed the match.
Check for duplicates
Search for the same supplier, amount and date before each payment run. Duplicate invoice numbers are a classic sign of trouble.
Pay on a schedule
Weekly runs with a cut-off beat ad hoc payments. They give time to check and help cash flow. The working capital release calculator shows the effect of timing.
A one week pilot
- Clean the vendor list. Remove duplicates and verify bank details by call back.
- Enter ten bills. Include one with a PO and one without.
- Test approvals. Route a bill to an approver and record the decision.
- Run a payment batch. Schedule payments by due date and check totals.
- Attempt a duplicate. Enter the same invoice twice and see if the tool warns you.
Two-minute check
Is free AP software enough?
Tick every statement that is true.
When to buy AP automation
Buy when invoices arrive in volume, when approvals slow payment, or when errors and duplicates appear. AP automation captures invoices, routes approvals and matches automatically. Test the saving with the invoice processing cost calculator.
Compare in the accounts payable automation software category and read our pricing guides for Bill.com and Tipalti. The free invoice software guide covers the receivables side.
Free download
Get the free accounts payable software scorecard and checklist
An Excel scorecard that scores up to four options against the criteria on this page, plus a one-page PDF checklist of upgrade triggers. Free, and ready the moment you submit the form.
- Excel scorecard with weights you can change and totals that update
- PDF checklist: the questions to ask before you commit and the signs it is time to pay
- No account, and no sales call unless you ask for one
What does an invoice cost you?
Find out with the invoice processing cost calculator, then compare tools in the AP automation category.
Questions people ask about free accounts payable software
Is there free accounts payable software?
Yes. Accounting tools with bill entry, open source ERPs and some free cloud plans handle AP basics. Capture, matching and approvals are often paid.
What is three way matching?
Comparing the purchase order, goods receipt and invoice before paying. It stops overpayment and duplicates.
How do I prevent duplicate payments?
Search for supplier, amount and date before each run, enforce unique invoice numbers and use software that warns on duplicates.
How do I prevent AP fraud?
Verify bank detail changes by call back, separate duties, review unusual payments and train staff on invoice scams.
When should I automate AP?
When volume, rekeying and approval delay justify the cost. Use the invoice processing cost calculator to test it.
Sources and how this page is kept current
- Association for Financial Professionals, 2026 AFP Payments Fraud and Control Survey, 14 April 2026.
- Ardent Partners, State of ePayables 2025 (as summarised by Bottomline), 2025.
- Verizon, 2025 Data Breach Investigations Report, 2025.
Every figure above was opened at its source on 25 October 2026 and quoted as written. Where a source reports a survey, we name the year it was fielded. Tools named on this page are examples, not endorsements. Features, licences and free limits change, so read the vendor page before you commit, and tell us on the contact page if something is out of date. Our editorial team reviews each guide at least twice a year.