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When your business processes around 400 invoices a month, the pain is obvious. For one manufacturer we worked with, the accounts payable team was spending 14 hours a week just opening emails, printing PDFs, and re-entering data. The approval process added another nine days on average because invoices sat in physical inboxes. They knew they needed accounts payable automation software, but they had no idea where to start.
This is a walkthrough of the exact sequence we use to take an AP team from paper-based chaos to a smooth, automated workflow. It’s not a theory piece. These are the steps that survived contact with real finance departments.
Step 1: Map Your Current Workflow in Painful Detail
Resist the urge to start demoing software immediately. You need to understand what you’re automating, and a vague summary isn’t enough.
Create a simple loop for every invoice that comes in:
- Where does it arrive? (Email inbox, mailroom, supplier portal, fax?)
- Who touches it first? How long do they hold it?
- What data gets keyed in, and where does it get verified?
- Who approves it, and what happens when they’re on holiday?
- How is it matched against purchase orders and receipts?
- Where does the final payment request get submitted?
Timeline everything for at least two weeks. In that manufacturer’s case, the average cost per invoice was $12.60 once you factored in labour, printing, and postage. Counting that number is valuable because it becomes your baseline for proving the software paid for itself. You’ll also spot bottlenecks you didn’t know existed, like the admin assistant who only approves invoices on Friday afternoons.
Step 2: Define the Three Features That Matter Most
Every accounts payable automation software has a long feature list. OCR, approval routing, duplicate detection, ERP integration, reporting. It’s overwhelming. Instead, decide on the three things that will actually move the needle for your team.
For a services company, that might be automated approval routing so a project manager gets the invoice instantly on their phone. For a retail chain, it might be multi-entity coding. For our manufacturer, it was the ability to capture invoice data accurately from badly scanned PDFs.
This is where you need to get specific. If you want a deeper comparison of options, this practical guide to accounts payable automation software walks through the main cost and benefit drivers. And on the purchasing side, I analyzed G2 reviews to find the best purchasing software, which gives you a realistic picture of what these tools actually deliver in day-to-day use. Those reviews showed that teams who bought based on a clear feature priority stayed happier than those who bought for the shiny extras.
Step 3: Get Your Vendors On Board Before You Go Live
Your software is only as good as the invoices it receives. If half your supplier base keeps mailing you paper, you’ll be running a hybrid process that’s harder than either extremes.
Start with your top 10 vendors by invoice volume. For each one, plan a short call where you explain the switch and what it means for them. The pitch is simple: they’ll get paid faster and with fewer errors because their invoices won’t be re-keyed manually. Send them a clear one-pager with the new submission process, whether that’s email, a supplier portal, or EDI.
Set a deadline and stick to it. In one implementation, we gave vendors 60 days to comply. Those that didn’t were sent a notice that their invoices would be logged on receipt rather than on processing, which could delay payment. That friendly pressure works better than any technical solution. Managing these relationships properly is half the battle, and tools like the best supplier relationship management software can help you keep vendor communication organised as you roll this out.
Step 4: Set Up the System in Three Phases
Don’t try to flip a switch and turn everything on at once. That’s how you end up with invoice data scattered across the new system and your old spreadsheets.
Phase 1: Foundation
Load your chart of accounts, tax setup, approval limits, and cost centre structure into the software. This is the boring stuff that determines whether automation actually works. For a mid-sized company, budget two days here. Create a test environment and run sample invoices through every approval path you can think of.
Phase 2: Open Items and Vendor Master
Migrate any unpaid invoices from your old system. More importantly, clean up your vendor master while you’re at it. Duplicate vendor records are a notorious source of payment errors. For every vendor, confirm the remittance address, tax ID, and payment terms before the go-live date.
Phase 3: ERP Integration
This is where the real time-savings happen. If you’re running SAP, for example, a live sync between your AP automation tool and the ERP means invoices post automatically and payment runs don’t need manual entries. Larger finance teams often find that an ERP SAP system implementation playbook comes in handy here, because the integration touches procurement, finance, and master data governance.
Step 5: Pilot With Two People, Then Expand
When the software is configured, don’t roll it out to the whole team at once. Pick two people who are genuinely open to change. Give them a half-day of training with real invoices, not dummy data. Have them run a full week of their normal workload through the system while you sit with them and watch.
That pilot will surface dozens of small issues. Maybe a particular approval chain has the wrong manager. Maybe the OCR needs to learn a specific invoice format from your biggest vendor. Fix these before you expand to the rest of the team.
When you do expand, pair each new user with a pilot user as their “buddy”. This works better than formal training because they get immediate answers in context. The finance team we mentioned earlier had a 100% adoption rate within three weeks using this method, with only three support tickets.
Step 6: Measure What Improved (and What Didn’t)
Three months after go-live, pull the numbers. Compare against the baseline you captured in Step 1.
- Cost per invoice: $12.60 down to $4.20 is typical.
- Average approval time: from nine days down to fourteen hours.
- Invoice processing volume per person: up 40% on the same headcount.
- Error rate: capture errors dropped by half after OCR learning.
But also look at what didn’t improve. If your payment cycle is still slow, that’s not an AP automation problem; it’s a cash management decision. If vendor queries are still heavy, maybe your supplier onboarding step needs more work. The software doesn’t fix everything. It just exposes exactly where the remaining problems are.
The real test is whether your team can now close the books in three days instead of eleven, or whether you’ve eliminated the month-end scramble. That’s the point where automation stops being a project and becomes simply how your finance team works.
