Open POs
Purchase orders received but not yet fully billed, each with its PO number, amount, and PDF.
Receivables · PO billing
Match purchase orders to invoices, one record at a time
When a client issues a purchase order before you bill, accounts payable expects the invoice to match the PO line for line. If your invoice number, amount, or scope drifts from what the PO authorized, the invoice sits unpaid until someone reconciles it by hand. Cash Workspace gives you one record per invoice where you note the PO number, both amounts, and a match-note, with the PO document attached.
The problem
Why PO and invoice mismatches stall payment
Accounts payable teams hold any invoice that doesn't tie back cleanly to an authorized purchase order. The gap is usually small and entirely avoidable.
- The invoice total is $4,200 but the PO authorized $4,000, so AP rejects it without comment.
- You reference the wrong PO number and the invoice gets routed to the wrong cost center.
- A PO covers three deliverables and you billed all of them on one invoice with no breakdown.
- Months later you can't find the original PO PDF to prove what was approved.
- Two invoices accidentally cite the same PO, so one looks like a duplicate and gets held.
The workflow
Pair each invoice with its PO before you send
Match the numbers and scope on your side first, so the invoice clears AP the first time.
- 1
Record the PO
When a client sends a purchase order, create a record with the PO number, PO amount, and the date received, and attach the PO PDF.
- 2
Add the invoice
When you bill against it, record the invoice number and invoice amount on the same record so both sit side by side.
- 3
Write a match-note
Note whether amounts and scope agree. If the invoice is $200 over the PO, write down why (approved change order, extra hours) or fix the invoice.
- 4
Flag mismatches
Set the status to 'mismatch — review' until the gap is explained or corrected, so nothing goes out unmatched.
- 5
File by client and PO
Keep matched pairs in a client folder so AP questions can be answered in one click.
Record structure
What to record for each PO-to-invoice pair
A tight set of fields lets a person confirm the match without reopening the original PDFs every time.
- PO number
- The purchase order reference exactly as the client wrote it, e.g. PO-2026-0488.
- PO amount
- The total the purchase order authorized, so you can compare it to what you billed.
- Invoice number
- Your invoice number for the work billed against this PO.
- Invoice amount
- The invoice total, sitting next to the PO amount for a quick eyeball check.
- Match-note
- A short note: 'matches', or 'over by $200, change order CO-3 approved', or 'split across 2 invoices'.
- Match status
- Matched, mismatch — review, or partially billed against PO.
- Client
- The client and cost center, kept as a consistent record.
- PO document
- The original PO PDF attached so the authorization travels with the record.
Example setup
An example PO-matching setup
One way to organize matched pairs inside your workspace.
Matched pairs
Invoices that tie cleanly to their PO, with a match-note confirming amounts and scope agree.
Mismatch — review
Pairs where the invoice and PO don't agree yet, held until the gap is explained or corrected.
Closed POs
Fully billed and matched purchase orders, archived by client and fiscal year.
Common mistakes
Mistakes to avoid
- Sending an invoice that exceeds the PO amount without noting an approved change order.
- Citing the PO number from memory and transposing a digit.
- Billing several POs on one invoice with no breakdown, so AP can't tie any of them out.
- Not attaching the PO, so you can't prove what was authorized when a dispute lands.
- Leaving the match status blank, so unmatched invoices slip out the door.
How it helps
How Cash Workspace helps
Both numbers side by side
Record the PO amount and invoice amount on one record so the comparison is right in front of you.
A match-note field
Write down exactly why amounts differ, or confirm they match, so the reasoning is never lost.
PO attached to the record
Attach the purchase order PDF so the authorization and the invoice stay together for any AP question.
Client folders
Group matched pairs by client and fiscal year so reconciliation and handoff stay simple.
Related
Related receivables workflows
Invoice approval status
Track where each invoice sits in a client's approval process.
Invoice-to-payment match-up
Reconcile what you billed against what actually got paid.
Invoice vs estimate check
Confirm the invoice total matches what you quoted.
Finance workspace for agencies
Organize client billing and costs across your whole agency.
All finance workflows
Browse the full Cash Workspace workflow library.
FAQ
PO matching FAQ
- Does Cash Workspace match POs to invoices automatically?
- No. You record the PO number, both amounts, and a match-note yourself, and the workspace keeps them on one record with the PO attached so a person can confirm the match.
- What if my invoice is higher than the PO?
- Note the reason in the match-note — for example an approved change order — and hold the status at 'mismatch — review' until the client's AP team confirms, so nothing goes out unexplained.
- Can one PO cover several invoices?
- Yes. Record each invoice against the same PO and use the match-note to show how the PO amount was split, keeping a running picture of what's been billed.
Organizing help — not tax, accounting, or legal guidance
Cash Workspace is a free workspace for organizing invoices, expenses, receipts, clients, and documents. This page is organizing guidance only — not tax, accounting, legal, or bookkeeping guidance. Cash Workspace does not connect to your bank, does not scan or read your receipts for you, and does not move or collect payments. Whether an expense is deductible depends on your situation, so confirm it with a qualified accountant or tax professional.
Keep every PO matched to its invoice
Start a free workspace and pair each invoice with its purchase order — both amounts, a match-note, and the PO attached — so billing clears approval the first time.