Picture a typical week. A shipment of raw materials arrives Tuesday. The invoice shows up Thursday. The packing slip sits on a clipboard at the receiving dock until someone walks it over to accounting. Until all three documents meet, the invoice can’t be paid, and nobody can say exactly where it’s waiting.
AP automation for manufacturing captures supplier invoices digitally, matches each one against its purchase order and receiving record, and sends only the mismatches to a person for review. For most manufacturers, that matching step is where accounts payable slows down, and it’s the step paper handles worst.
What Is AP Automation for Manufacturing?
AP automation for manufacturing is software that handles the accounts payable work between receiving an invoice and paying it. It captures invoice data, matches it to purchase orders and receiving records, routes approvals, flags exceptions, and passes approved invoices to your ERP. The goal is fewer manual touches and a process you can measure.
How is it different from general AP automation?
In many service businesses, invoices are simple: one bill, one approver. Manufacturers deal with something more involved. A large share of their spend runs through purchase orders for raw materials, components, MRO supplies, and freight, and each of those invoices has to be checked against what was ordered and what arrived.
That’s why manufacturing accounts payable automation has to pull data from purchasing and receiving as well as the invoice, often across more than one plant.
Does AP automation replace your ERP?
No. Your ERP stays the financial system of record. AP automation handles the work around it that ERPs weren’t built for, such as capturing invoices from email and paper, routing approvals, and managing exceptions. Our guide on how AP automation integrates with your ERP covers this in more detail.
Mosaic Paperless Solutions implements AP automation and ERP integration for manufacturers and other document-heavy organizations, connecting to the ERP you already run, including Infor CSI/Syteline, NetSuite, Microsoft Dynamics, Sage Intacct, Oracle Fusion, SAP, and more.
Why Is Accounts Payable Harder for Manufacturers?
Manufacturing AP is harder because every PO-backed invoice depends on records held by three different groups. When those records are on paper, delays are built into the process, no matter how hard the AP team works.
Three departments, one invoice
Purchasing creates the PO. Receiving confirms what showed up. Accounts payable gets the invoice and has to connect the two. On paper, that connection depends on someone carrying a packing slip across the building, or on an AP clerk calling the dock to ask whether a shipment came in.
Each handoff adds time. Nobody sees the total because no single person owns the whole trip.
What breaks the three-way match?
Even when the paperwork arrives on time, the numbers often don’t line up. Common causes include:
- Partial shipments, where only part of the order arrived
- Backorders that split one PO across several invoices
- Freight and fuel surcharges that weren’t on the PO
- Price changes on commodities or components since the PO was issued
- Substitutions, where the supplier shipped an equivalent part number
For more on where invoices get stuck, see eliminating AP bottlenecks.
Every mismatch means research: pulling the PO, finding the receiving document, and checking with the buyer. On paper, that research happens one invoice at a time.
Why do multiple plants make it worse?
Many manufacturers run more than one plant or warehouse, each with its own receiving dock and its own paper trail. Approvals stall when the person who needs to sign off works at another location, is out on the production floor, or is traveling. Invoices wait in an inbox or a desk tray, and AP can’t tell which one.
We cover how multi-location companies solve this in scaling document management across locations.
What do late payments cost a manufacturer?
Slow AP doesn’t stay in accounting. When invoices sit, suppliers notice. The costs show up as:
- Supplier credit holds that can delay raw material deliveries
- Missed early-payment discounts
- Late fees and strained supplier relationships
- A month-end close that slips while AP chases unmatched invoices
Processing cost adds up too. Every invoice that has to be researched, re-keyed, or chased for approval takes staff time, and that time grows with every exception. We break down those numbers in the cost of processing an invoice. With year-end close coming, unmatched invoices are the ones that hold up the books.
Here’s a quick test. Could you say right now how many invoices are waiting on a receiving document? If not, that’s the measurement problem in one question. You can’t manage a process you can’t see.
How Does Automated Three-Way Matching Work?
Automated three-way matching compares each invoice to its purchase order and receiving record without anyone keying in data. Invoices that match are approved and passed to the ERP. Invoices that don’t are routed to the person who can fix them.
What is three-way matching?
Three-way matching is an accounts payable control that confirms an invoice is accurate before it’s paid. It checks three documents against each other:
| Document | Where it comes from | What it confirms |
|---|---|---|
| Purchase order | Purchasing | What you agreed to buy, and at what price |
| Receiving report | Receiving dock or warehouse | What actually arrived |
| Supplier invoice | Supplier | What you’re being asked to pay |
If quantities and prices agree across all three, within the tolerances you’ve set, the invoice is cleared for payment.
What happens when an invoice matches?
It moves forward on its own. The system captures the invoice data, checks it against the PO and receiving data in your ERP, and sends the approved invoice on for payment. Nobody re-keys anything.
What happens when it doesn’t match?
The invoice becomes an exception and goes to the person who can resolve it, with the PO, receiving record, and invoice attached. A price difference goes to the buyer. A quantity difference goes to receiving. AP can see the status the whole time instead of tracking it in a spreadsheet. This is exception-based processing. One Mosaic customer cut manual data entry by 85% after making the switch.
Tolerances matter here. Many manufacturers let small variances pass automatically, such as a set dollar amount or percentage. Agreeing on those rules is part of implementation. For an example of how an ERP defines matching rules, see Microsoft’s documentation on accounts payable invoice matching in Dynamics 365 Finance.
How does receiving data get into the process?
For manufacturers, this is the step that decides whether automation works. If receiving still runs on paper, the system can’t match what it can’t see. Many manufacturers close that gap by recording receipts in the ERP at the dock, which gives the system a digital record to match against. Others scan packing slips as shipments arrive. The right option depends on how your receiving team works today.
What Results Can Manufacturers Expect From AP Automation?
The results that matter most are faster processing, fewer manual touches, and a clear view of where every invoice stands. Two Mosaic customers show what that looks like in practice.
How Wood-Mizer handles 60,000 invoices with a small team
Wood-Mizer, the world’s largest manufacturer of portable sawmills, moved its AP to an outsourced third-party platform and found it expensive and inflexible, so it returned to Mosaic. Wood-Mizer now processes about 60,000 invoices a year, fully integrated with its Infor CSI ERP, and dropped a $4,300-a-month outsourcing fee. Its accounting supervisor estimates the team’s efficiency at 96% or greater. Read the full Wood-Mizer case study.
What Franklin Foods learned about making change stick
Software is the easier part. Getting purchasing, receiving, and AP to work a new way is harder. When Franklin Foods, a food processor, started moving off paper with Mosaic’s AP automation, the cultural shift from ‘this is how we’ve always done it’ to ‘why didn’t we do this sooner?’ happened within the first quarter. AP is where that shift matters most, because three departments have to change how they work, not just accounting. Our post on digital transformation in food manufacturing tells more of that story, and overcoming automation resistance covers the people side.
What can you finally measure?
Visibility is the result that changes how you manage AP day to day. When matching runs through a system instead of paper, these are the questions worth tracking:
| Question | Why it matters |
|---|---|
| How many invoices are waiting on receiving? | Shows where the match is breaking down |
| How long do approvals take? | Points to the approvers or plants that need attention |
| Which suppliers cause the most exceptions? | Gives purchasing facts for supplier conversations |
| Which early-payment discounts did we miss? | Puts a dollar figure on slow processing |
Is AP Automation Right for Every Manufacturer?
No. AP automation makes the most sense when matching and approvals are eating real time. Some manufacturers aren’t there yet.
When it may not be worth it yet
Automation can be hard to justify if:
- Your invoice volume is low and steady
- Few purchases run through POs
- You operate from one location with a short approval chain
- Your supplier base is small and pricing rarely changes
- Your ERP’s built-in AP features already handle the workload without workarounds
If that sounds like your operation, tightening up the manual process may be enough for now. Our guide on whether paperless AP is a good fit can help you decide.
Signs it’s time to automate
- Suppliers call about late payments, or you’ve been put on credit hold
- You regularly miss early-payment discounts
- Invoices sit waiting for receiving paperwork
- Month-end close slips because of unmatched invoices
- AP can’t take on more volume without adding staff
- Approvals stall when the approver is at another plant
If several of these sound familiar, your process is holding the team back. Smaller teams often gain the most, as we explain in how to process high invoice volumes with a small staff.
What Should Manufacturers Look for in an AP Automation Solution?
Look for proven ERP integration, matching rules that handle real manufacturing exceptions, multi-plant support, and a partner who stays involved after go-live. Ask any vendor, Mosaic included, these questions:
- Do you have a proven integration with our ERP and version?
- How do you handle partial receipts, freight charges, and price tolerances?
- Can you support multiple plants, legal entities, and approval chains?
- How does receiving data get into the system without adding paperwork on the dock?
- What reporting will we have on match rates, exceptions, and approval times?
- Who handles setup, training, and change management, and who supports us after go-live?
The last question deserves extra weight. In Mosaic’s experience, technology is about 20% of a successful implementation. The other 80% is mapping workflows, configuring the system, and getting people to adopt the new way of working.
If your ERP vendor says its built-in module covers all of this, read Our ERP Has a Module for That: Why Generic Tools Fail before you decide.
Fix the Match, and the Rest of AP Follows
In manufacturing, the invoice is rarely the problem. The match is. When purchase orders, receiving records, and invoices live on paper, three departments share a process nobody can see, and suppliers feel the delay first.
AP automation for manufacturing makes that match automatic and visible. Matched invoices move on their own, exceptions reach the right person with the documents attached, and you can finally measure where the time goes.
Ready to see where your process stands? Request an Automation Assessment and talk with Mosaic about your AP workflow, from the receiving dock to payment.
Not ready to talk yet? Use our AP automation ROI calculator to estimate what faster matching could be worth for your plants.
Frequently Asked Questions
What is three-way matching in accounts payable?
Three-way matching is an accounts payable control that confirms an invoice is accurate before it’s paid. It checks three documents against each other:
| Document | Where it comes from | What it confirms |
|---|---|---|
| Purchase order | Purchasing | What you agreed to buy, and at what price |
| Receiving report | Receiving dock or warehouse | What actually arrived |
| Supplier invoice | Supplier | What you’re being asked to pay |
If quantities and prices agree across all three, within the tolerances you’ve set, the invoice is cleared for payment. For a visual of the full process, see the three-way match flowchart from the Institute of Finance and Management (IOFM).
How does AP automation handle partial shipments?
When only part of an order arrives, the system compares the invoice to the quantity received rather than the full PO. If the supplier billed only for what was delivered, the invoice can match and move forward. If the supplier billed for the full order, the invoice becomes an exception and goes to purchasing or receiving to resolve. The exact handling depends on how matching rules are set up during implementation.
Can AP automation work with our manufacturing ERP?
In most cases, yes. AP automation is designed to connect to your existing ERP, which remains the system of record for purchase orders, receipts, and payments. Confirm that any vendor has a proven integration with your specific ERP and version before you commit.
How long does it take to implement AP automation at a manufacturing company?
It depends on invoice volume, the number of plants, your ERP, and how much process change is involved. A phased rollout lets you start delivering value before every location is live. The people side matters as much as the technology. See our guides on phased implementation and a successful AP automation rollout for what to expect.
Is AP automation worth it for small and midsize manufacturers?
Often, yes, because the size of your AP team matters more than the size of your company. Small AP teams tend to feel the pain of manual matching the most, since one absence can back up the whole process. Wood-Mizer’s small AP team handles 60,000 invoices a year with Mosaic.
What’s the difference between two-way and three-way matching?
Two-way matching compares the invoice to the purchase order only. Three-way matching adds the receiving report, which confirms the goods actually arrived. Manufacturers usually need three-way matching for inventory and raw materials, since paying for goods that never arrived is a real risk.
