Key takeaways
- "Vendor approval" is really four processes: onboarding a new vendor, approving purchase orders, approving invoices and releasing payment. Delays hide in the hand-offs between them.
- Most of the waiting is not work. It is documents being chased, emails sitting unread and approvers who do not know something is waiting for them.
- Clear approval rules, automatic reminders and a vendor portal remove most of that waiting without removing anyone's control.
- Measure how long each stage takes today before changing anything, so you can prove the improvement.
Ask a purchase manager in a manufacturing company where their week goes, and the answer is rarely "negotiating with suppliers". It is chasing documents, forwarding emails for approval, matching invoices against purchase orders and answering vendors who want to know when they will be paid.
None of that is the real work of procurement, and most of it can be automated. This guide explains where vendor approvals get stuck and how manufacturers are cutting the time it takes, without losing control over who approves what.
Vendor approval is four processes, not one
| Stage | How it often works today | How it works when automated |
|---|---|---|
| Vendor onboarding | Documents requested by email, filed by hand, followed up by phone | Vendor registers and uploads documents in a portal; checks and reminders are automatic |
| Purchase order approval | PO emailed to a manager and waits in their inbox | PO goes to the right approver by value and category, with reminders and escalation |
| Invoice approval | Invoice checked against the PO and goods receipt by hand | Invoice matched automatically; only mismatches go to a person |
| Payment release | Vendors phone accounts to ask about status | Vendors see invoice and payment status themselves |
Where approvals actually get stuck
- Incomplete documents. A new vendor sends their GST certificate but not the cancelled cheque, and the file sits until someone notices.
- Approvals buried in inboxes. The approver is travelling, on the shop floor or simply busy, and the email slides down the list.
- No clear rules. Nobody is sure whether a ₹40,000 PO needs one signature or two, so it goes to everyone.
- Mismatches found too late. A rate or quantity difference is spotted only when the invoice reaches accounts, and the whole cycle starts again.
- No visibility. Nobody can see how many approvals are pending, with whom, or for how long.
1. Vendor onboarding without the paper chase
A vendor portal lets suppliers register themselves and upload what you need: GST and PAN details, bank details, Udyam (MSME) registration where applicable, and any quality or compliance certificates. The portal checks that every required document is there before the application reaches your team, sends reminders for anything missing, and warns you before certificates expire.
Your team's job changes from collecting paperwork to reviewing a complete file and clicking approve.
2. Approval rules instead of email chains
Write down who approves what, then let the system follow it:
- By value: for example, the purchase manager up to a set amount, the plant head above it, the owner above a higher limit.
- By category: capital items, raw materials and services can follow different routes.
- With reminders and escalation: if an approval waits too long, the approver is reminded and then their manager is alerted.
- From a phone: approvers can review and approve from their mobile, including through a WhatsApp alert with a link, instead of waiting until they are back at a desk.
Control does not change. The same people approve the same things. They are simply told about it immediately and cannot forget.
3. Let the system match invoices
Three-way matching, checking the invoice against the purchase order and the goods receipt, is exactly the kind of repetitive work software does well. When the rates, quantities and taxes agree, the invoice moves straight to payment approval. When they do not, only the mismatch goes to a person, with the difference highlighted.
If invoices arrive as PDFs or scanned images, AI can read them and pull out the details, so nobody has to type them in. Anything the system is unsure about is flagged for review.
4. Show vendors their payment status
Much of the accounts team's day goes on "has my invoice been approved?" calls. When vendors can see the status of each invoice and payment in the portal, most of those calls stop.
There is also a compliance reason to keep payments moving. Payments to micro and small enterprises registered under the MSME framework are subject to time limits, and delayed payments can affect your tax deductions. Check the current rules with your CA, and make sure MSME vendors are flagged in your system so their invoices are not the ones left waiting.
How to measure your approval time
Before changing anything, collect a month of data on four numbers:
- Days from a vendor's first contact to approval as a supplier
- Hours from PO creation to final approval
- Days from invoice receipt to invoice approval
- Days from invoice approval to payment
These tell you where the biggest delay is, which is where to start, and they give you a baseline to measure the improvement against.
Where to start
You do not need to automate everything at once. Most manufacturers get the quickest win from one of two places: vendor onboarding, if you add new suppliers often, or invoice matching, if accounts is the bottleneck. Start there, prove it works, then connect the rest.
If your purchase, stores and accounts data already live in one system, the portal can connect to it. If they do not, that may be the moment to look at an ERP built around your operations. See how we work with manufacturing businesses, or talk to us about a vendor portal for your suppliers.