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Invoice processing: the steps, and how to automate them.

What happens to a supplier invoice from the moment it arrives until it's paid and archived, and what automation changes at each step.

By Tan Somkiat (LinkedIn), Co-founder, Security & Automation · Co-authored with Claude, Anthropic's AI assistant

Updated 10 October 2026

The short answer

Invoice processing is how a business receives, checks, approves, pays and records supplier invoices. Done by hand, every invoice is typed in and chased for approval. Automated, the details are read for you, checked, routed and posted, and people only handle exceptions and approve payments.

The invoice processing steps

  1. Receive: invoices arrive by email, post, supplier portals or scanned paper.
  2. Capture: supplier, ABN, invoice number, dates, line items, GST and totals are recorded.
  3. Validate: totals and GST are checked, the supplier is confirmed, and duplicates are caught.
  4. Match: where there's a purchase order, the invoice is compared with what was ordered and received.
  5. Approve: the right person approves the spend.
  6. Pay: approved bills are paid on their due date.
  7. Record and archive: the bill is posted to your accounting software and the invoice stored.

Manual vs automated invoice processing

StepManualAutomated
CaptureTyped in from the PDFRead by AI, with uncertain fields flagged
ValidateSpot checks, if there's timeEvery invoice checked for ABN, GST, totals and duplicates
ApproveForwarded by email and chasedRouted by amount or cost centre, with reminders
RecordRe-keyed into Xero or MYOBDraft bill created automatically
ArchiveSaved somewhere, sometimesNamed and filed consistently, searchable

Workflows to automate

Supplier invoice intakeEvery format, handled the same way.
  1. Invoice arrives as a PDF, scan or email
  2. Details and line items extracted
  3. ABN, GST and totals validated
  4. Coding suggested from past bills
  5. Queued for approval
Exception handlingProblems surfaced with the source document attached.
  1. Low-confidence field or mismatch
  2. Exception queue with the original invoice
  3. Staff correct it
  4. Rule updated so it doesn't recur
Approval and paymentApproved quickly; paid only by a person.
  1. Bill routed to its approver
  2. Reminder, then escalation
  3. Approved bills batched by due date
  4. Finance releases payment in the bank
ArchivingRecords kept for as long as the ATO requires.
  1. Invoice processed
  2. Named to your convention
  3. Filed to Paperless, SharePoint or Drive
  4. Kept for five years

Australian requirements to build in

  • Tax invoices: GST-registered businesses generally need valid tax invoices to claim GST credits on purchases over $82.50, and records are generally kept for five years.
  • ABN checks: confirm the supplier's ABN matches who you think you're paying.
  • Bank-detail fraud: treat any change to a supplier's bank details as suspicious until it's verified by phone to a known number.

Invoice processing software, or a tailored workflow?

Dedicated software suits high volumes and complex approval chains. Many smaller businesses get most of the benefit by automating around the accounting software they already use, such as Xero's automated bill entry plus approval routing and checks. See our accounts payable automation service, or compare accounting platforms in MYOB vs Xero vs QuickBooks.

Still typing in supplier invoices?

We'll map how invoices move through your business and show what automation would save.

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Related automation services

We build invoice capture, approvals and payment checks around the accounting software you already use.

Accounts Payable AutomationAccounting AutomationDocuments & Data

Frequently asked questions

What is invoice processing?

It's the process of receiving, checking, approving, paying and recording supplier invoices: the core of accounts payable.

Can the whole process be automated?

Most of it can: capture, validation, coding, routing and filing. Approving spend and releasing payments should stay with a person.

How accurate is automated invoice capture?

It's reliable for clear invoices. Anything uncertain is flagged for a person to check rather than guessed.

Sources

How this guide was made: Tan Somkiat wrote this guide with Claude, Anthropic's AI assistant, which helped research and draft it. Facts and figures come from the sources linked above and were checked on the dates shown.

This guide is general information, not tax advice. Check record-keeping rules with your accountant or the ATO.