Accounts Payable Workflow: 3 Easy Steps for Small Businesses (2026)

An accounts payable (A/P) workflow is how a business records, verifies, approves, and pays vendor bills. A clear process helps prevent errors and late payments by making each person's responsibility clear.

This guide groups the accounts payable process into three main stages: entering bills, reviewing and approving them, and processing payments. The final stage also includes confirming that payments clear and reconciling them against the bank records. For purchases of goods, review may involve comparing an invoice with a purchase order (PO) and a receiving report (RR). Service and recurring bills may instead be checked against contracts or other approval records. These controls apply whether the business uses paper documents or accounting software.

The image below summarizes the three stages of the accounts payable workflow. These stages apply whether the business uses paper documents or digital accounting tools:

Step 1: A/P clerk enters the data in the system

The A/P clerk collects the invoice and records the bill for review. For goods purchased using a purchase order (PO) and receiving report (RR), both documents should accompany the invoice. For services, utilities, and other expenses without a PO, use the contract, service confirmation, or other evidence that the charge was authorized. The tables below illustrate a PO-based purchase; other transactions may need different supporting records.

Step 1.1: Secure copies of the PO, RR, and invoice

Depending on the company's procedures, the A/P department may not automatically receive the PO when an order is placed or the RR when goods arrive. The purchasing and receiving teams should make those records available for invoice verification and payment processing. 

Paper and electronic records need the same basic checks. The steps below use paper documents as examples; when records arrive by email or upload, save them in an accessible location and keep a record of receipt.

For purchases supported by a PO and receiving report, the A/P clerk should:

1. Ask the purchasing department for the accounting department’s copy of the PO. 

• The purchasing department often prepares two types of POs: a complete PO and a blind PO. For accounting purposes, you need the complete PO because the blind PO doesn’t show the quantity ordered and the total amount. 

2. Ask the receiving department to furnish a copy of the RR together with the original copy of the invoice. 

• If the vendor sends invoices via email, it’s best to ask vendors to email all invoices directly to the A/P department’s email address.
• The A/P department should retain the original invoice or an authorized electronic copy in a central record that reviewers can access.

3. For paper-based transactions, stamp both PO and RR documents as RECEIVED with the date of receipt and the signature of the A/P clerk. 

• For paperless businesses, the A/P clerk must provide any kind of notification to the sender that the documents have been received.
• For example, replying ACKNOWLEDGED in the email is a form of notification of receipt.

Step 1.2: Enter the PO, RR & invoice in the accounting system

Depending on the accounting system, the A/P clerk should record the bill and attach or link the supporting documents applicable to that transaction.

• Some small business accounting tools cannot record POs or receiving reports as separate entries. In that case, keep the documents in an organized file or attach scanned copies to the bill so reviewers can verify the purchase.
• In accounting software, a vendor invoice is entered as a bill. Look for a Create Bill or Add Bill option, then check the details before saving.
• Save an entered or imported bill for review according to the software's workflow. Do not approve or schedule the payment until the invoice details and supporting records have been checked.

The goal is to keep each bill and its supporting records together for the next stage of review.

QuickBooks Online, for example, can create bills for review from emailed or uploaded invoices. The A/P clerk checks the vendor, invoice number, amount, due date, and account coding before passing the bill to the designated approver in Step 2. QuickBooks Bill Pay can support later payment steps, but it does not replace checking invoice details.

Step 2: A/P clerk reviews the submitted documents

In the second step, the A/P clerk reviews bills for completeness and accuracy, then sends them to an authorized manager or owner for approval. For goods bought using a PO and RR, three-way matching compares what was ordered, received, and billed. For service or recurring expenses, a contract, work confirmation, or other authorization record may be more appropriate.

• Completeness: For purchases requiring three-way matching, the A/P clerk gathers the PO, receiving report, and invoice before sending the bill for approval. For other expenses, the required evidence may be a contract, service record, or authorized request. Check that the necessary information is present.
• Accuracy: The PO, RR, and invoice should agree, with approved differences or partial deliveries documented. Recalculate quantities, unit prices, taxes, and invoice totals.
• Existence: For goods, the clerk verifies what was received and its condition. For services, the reviewer should confirm that the work was completed or otherwise met the agreed billing terms.

Step 2.1: Perform a three-way match

Three-way matching checks whether what the business ordered, received, and was billed for agree. The infographic below shows the three comparisons for a purchase of goods.

In performing a three-way match, the A/P clerk should do the following:

• Check if the invoice and PO match: Compare the vendor, item descriptions, quantities, agreed prices, and totals. Investigate any unapproved difference rather than assuming every variation is an error.
• Check if the PO and RR match: Confirm the items and quantities received against what was ordered. A partial delivery can be valid if it is documented.
• Check whether the RR and invoice match: Confirm the billed items and quantities match what was received, and investigate missing or damaged goods before approving payment.

If quantities, prices, or other details differ, ask the purchasing team, receiving team, or vendor to resolve the discrepancy before payment.

For a partial delivery, compare the invoice with the goods actually received and confirm whether the vendor billed for the full order or only the delivered portion. Document approved price changes before authorizing payment.

Step 2.2: Assemble the voucher package

For a PO-based purchase, the A/P clerk assembles the voucher package after resolving any discrepancies. This package includes the PO, receiving report, and invoice, which the A/P manager or owner reviews before approval. For expenses without a PO, include the relevant invoice, contract, or other authorization records. The voucher template below illustrates the PO-based process.

The payment voucher summarizes the payee, amount requested, affected accounts, and supporting documents. In the manual example, the A/P clerk fills out the voucher, and the A/P manager signs the Approved By field. An authorized finance employee then determines the payment method and releases the funds.

The blank voucher above shows where a business records a payment request and its approval details before releasing funds. In a digital workflow, invoices, supporting documents, and approvals can be stored together electronically. Eligible QuickBooks Bill Pay configurations support bill approval workflows, although the available controls depend on the subscription.

The A/P manager then forwards the voucher package to the finance officer, who will send out the payment to the vendor.

The partially completed voucher shows a payment request that has been approved but not yet paid. Electronic approval records serve the same purpose: they document authorization, not proof that the payment was sent.

In the manual example, the A/P clerk prepares the voucher, the A/P manager approves it, and an authorized finance employee releases payment. Keeping these responsibilities separate helps reduce the risk of errors and unauthorized payments. If a small business cannot separate every task, the owner or an independent reviewer should periodically examine bills, approvals, and bank transactions.

Step 3: The finance department processes and sends the payment

After the A/P clerk reviews the bill and the A/P manager or owner approves it, an authorized payer completes the payment according to the business's policy. Payment approval and payment release are separate controls, even if a small team assigns more than one task to the same person.

Job titles vary. Only employees authorized to release funds should have access to payment methods and relevant bank permissions. In a small business, the owner may approve and release payments while a bookkeeper prepares bills and later helps reconcile them; periodic independent review provides an additional safeguard.

Step 3.1: Review the voucher package

Before releasing payment, the finance officer or authorized owner checks the approved voucher package. Confirm the payee, invoice amount, supporting documents, and approval, and look for duplicate bills. If details are missing or inconsistent, return the package for correction before sending funds.

The table below lists common checks to perform before releasing payment:

For electronic payments, independently verify the bank details of a new vendor or any request to change an existing vendor's payment account. Use a trusted phone number or contact channel already on file, not the contact information supplied in the change request. Keep the verification and approval records with the bill. The FBI recommends a separate verification channel to reduce business email compromise risk.

Step 3.2: Send payment

After final review, the authorized payer completes the voucher, selects the payment method, and sends or schedules the payment. Record the check number or electronic payment reference once payment is issued. In the paper example below, a PAID stamp indicates that the voucher has been processed under the company's procedures; bank reconciliation is still needed to confirm that the payment cleared.

The PAID stamp on the completed voucher helps prevent a second payment from the same approved request. It records that the business processed the payment, but does not alone prove that a check has cleared or that the vendor received the funds. Retain the voucher and payment confirmation, reconcile against the bank statement or feed, and follow up on any outstanding checks or transfers.

QuickBooks Bill Pay provides an electronic payment record comparable to the stamped voucher. Businesses can schedule ACH transfers or mailed checks and track payment status, but a scheduled or processing payment may not have cleared. Confirm the final status and reconcile the payment with the corresponding bank transaction before treating it as settled.

For example, suppose a small café receives a $450 invoice for coffee beans. The bookkeeper checks it against the purchase order and receiving report, records the bill, and sends it to the owner for approval. The owner reviews the documentation, independently verifies any new or changed bank details, and schedules the vendor payment.

After the payment clears, the bookkeeper matches it to the bank transaction and keeps the invoice, approval, and payment confirmation. This provides a workable review trail without separate A/P and finance departments.

Do you need to automate the accounts payable workflow?

A/P automation may reduce the time spent entering bills, collecting approvals, and tracking payments. It can be useful even when invoice volume is low, especially if bills arrive through several channels, approvals stall, or payment due dates are difficult to manage.

Choose automation based on the bottleneck. If employees spend time retyping emailed invoices, start with bill capture. If bills wait for approval, consider reminders or approval routing. If payments often run late, prioritize scheduling and status tracking. Compare the expected benefit with subscription, processing, setup, and training costs. QuickBooks Bill Pay is one option, and advanced approval controls depend on the plan; staff must still verify invoices and payment instructions.

Before choosing a tool, consider what slows down your current workflow and what it would cost to improve it. Ask yourself:

• How many hours do you or your staff spend processing invoices each week?
• What would the software, setup, and employee training cost?
• Would the time saved and fewer payment errors justify the ongoing cost?
• How could automation improve employee productivity, and what higher-value tasks could staff focus on instead?

Frequently asked questions (FAQs)