How to handle supplier invoices without losing your evenings
The dockets from the timber yard, the monthly account from the wholesaler, the invoice from the plumbing merchant — supplier bills are the admin nobody signed up for. Left in the ute console, they pile up until month-end, then get entered in a rush that's half guesswork. And every bill that isn't tied back to the job it belongs to is margin quietly walking out the door. Here's how to stay on top of them without losing another evening.
Why supplier bills cost you twice
A supplier invoice taxes your time twice. First you enter it so your accounts are right. Then — if you're doing it properly — you reconcile it against what actually turned up and what went onto which job, so your stock and job costs are right. Most tradies do the first badly and the second not at all. That's how materials get bought but never billed to the client, and how you finish a job with no idea what it really cost.
Step 1 — Deal with bills as they come in, not at month-end
A month's worth of bills entered in one late-night session is where errors and missed materials live. Handle each bill when it arrives — a two-minute job — and the month-end scramble disappears. If it's a paper docket, photograph it on the spot so it can't get lost in the console.
Step 2 — Tie every bill to the job it belongs to
This is the step that protects your margin. When you buy materials for a specific job, cost them to that job as you enter the bill. Now you know what the job actually cost, and nothing bought for it gets left off the client's invoice. Bills that go into a general pile, un-linked, are how the extra fittings never make it onto the bill.
Step 3 — Update your stock from the bill
If you carry van or shed stock, a supplier invoice is a restock event — the materials just arrived. Update your stock count as you process the bill and your inventory stays honest without a separate stocktake. Buy it, book it in, done.
Step 4 — Watch for price creep
Supplier prices move, quietly. A fitting that was $4 last quarter is $5 this one, and if you're still quoting off old numbers, you're eating the difference. Processing bills promptly lets you spot when a supplier's prices have crept up so you can update your own pricing before it costs you.
Step 5 — Kill the manual data entry
Typing supplier invoices line by line is exactly the kind of repetitive admin worth removing. Photographing or uploading bills and having them read automatically — matched to your suppliers and materials — turns an evening of data entry into a quick review. Less typing, fewer errors, more time on the tools or at home.
Common mistakes
- Letting bills pile up for a month-end blitz.
- Entering bills without linking them to a job.
- Never updating stock from purchases.
- Quoting off outdated supplier prices.
- Typing every line by hand when it can be read for you.
FAQ
How do I stop materials being left off a client's invoice?
Cost materials to the specific job as you enter the supplier bill. If every purchase is linked to a job, nothing bought for that job slips off the final invoice.
How often should I enter supplier invoices?
As they arrive. Little and often beats a month-end pile — it's faster overall, more accurate, and keeps your job costs and stock current.
Can supplier invoices update my stock automatically?
Yes — a supplier bill is effectively a restock. If your system reads the bill and matches it to your materials, your inventory can be updated from the invoice without a manual count.
Let the bill enter itself
You can process supplier bills promptly by hand — or you can upload the PDF or a photo and have the lines read, matched to your materials, and posted to the job or your stock for a quick check.
→ See how supplier invoice scanning in My Apprentice kills the data entry.