Procurement Approval Workflow: Requisitions, POs & Controls (2026)

A procurement approval workflow routes purchase requests through authorization before a purchase order is issued — approving the commitment before money is owed, not the invoice after it arrives.

That timing is the entire point. Invoice approval catches problems downstream — after goods arrive and the vendor expects payment. Procurement approval prevents the problems from being ordered in the first place. This guide covers the five-stage chain, the purchase approval matrix, routing patterns, and the control that stops threshold-splitting. Siblings in the cluster: Invoice Approval Workflow and Payment Approval Workflow.

The five-stage procurement chain

1. Requisition — someone requests a purchase: what, why, how much, which cost center. Approval happens here — the earliest, cheapest point to say no
2. Purchase order — the approved commitment issued to the vendor at the agreed price
3. Receipt — the goods or services arrive and get recorded. This document is what makes verification possible later
4. Invoice — the vendor bills; the three-way match verifies PO, receipt, and invoice agree
5. Payment — released to verified bank details: Payment Approval Workflow

Two approval gates, one verification. The requisition gate decides whether the company commits; the match verifies the commitment was fulfilled. Most procurement failures are missing-gate failures: purchases made without either one.

The purchase approval matrix

Adapt the amounts; the structure holds. The full template with special conditions: What Is an Approval Matrix?

Routing patterns for purchase approvals

• By cost center — the budget owner approves their own spend; no one approves a budget they don't own
• By category — IT purchases route through IT (specification check), services through legal (contract terms), stock through operations
• By vendor status — first purchase from a new vendor adds a verification stage: the vendor gate and bank-detail confirmation happen before the first PO, not at the first invoice
• By competitiveness — above a threshold, require multiple quotes attached to the requisition; approvers see the alternatives, not just the ask

The split-purchase control

Thresholds create a game: anyone who wants a $30,000 purchase approved at the $5,000 level can split it into seven orders. The structural defense is visibility — software that shows one requester's cumulative spend with the same vendor over a rolling window, making the pattern visible at the approval moment, not at the audit. This is one of the ways procurement fraud actually happens; the others are in How to Prevent Vendor Fraud.

Common procurement approval mistakes

• Approving POs after the purchase. Retroactive approval is record-keeping, not control
• Skipping the receipt record. No goods receipt means the three-way match can't run — the verification layer silently disappears
• Requester as approver. The person who wants it should never be the person who signs for it: segregation of duties
• No competitive quotes above threshold. The single-vendor habit above $50K is where overpricing lives

Frequently Asked Questions

What is a procurement approval workflow?

The routing that authorizes purchases before commitment: requisition approval per matrix, PO issuance, then verification by the three-way match at invoice.

What is the difference between requisition and PO approval?

The requisition asks permission to buy; the PO executes the commitment at agreed terms. Most workflows gate both; the requisition gate is where cost is prevented.

How do you approve purchase orders?

Route the requisition through the value-banded matrix before the PO issues — cost center owner first, procurement and finance at thresholds, with quotes attached above the competitive-bid limit.

How does procurement connect to payments?

The PO and receipt become the reference documents for the invoice match, and the matched invoice routes through the invoice workflow to payment — approved bills pushing to QuickBooks as drafts.

Approvdit runs procurement from requisition to payment — matrix routing, quotes attached, the three-way match, and approved bills pushing to QuickBooks. Book a live demo to see the full chain.