The supplier-invoice workflow that doesn't pile up by Friday.

Supplier invoices are the easiest workflow in a small business to let slip. They're small, they're individually low-stakes, and a single missed one rarely causes immediate pain. So they pile up — on the wall, in the email, in the apron pocket — until Friday afternoon, when the owner sits down with a coffee and an hour of dread.

There's a cleaner way. We landed on the five-step workflow below after a year of watching nouz customers fight the same Friday battle. The rule is small: every invoice gets entered the day it arrives, in under 60 seconds. The change is large: the Friday pile disappears.

Why daily, not Friday

The Friday model has three failure modes. All three are why the pile keeps growing.

• Memory decay. An invoice that arrived on Monday is fresh in your head: you remember the delivery, the substitution, the bag that was missing. By Friday, you're reconstructing — and reconstruction is where errors sneak in.
• Compound time cost. 60 seconds per invoice × 25 invoices on Friday = 25 minutes. But the context-switch tax — pulling up the system, opening each one cold, comparing to the order — is roughly 3× the per-invoice time. Daily entry has none of that overhead.
• Lost price-change signals. If milk went up €0.08/L on Tuesday's invoice, you want to update your COGS Tuesday — not five days into selling cappuccinos at the old margin. The Friday workflow loses the signal.

A 60-second daily flow costs you the same total time per week as the Friday model, with none of the decay and none of the lost signals.

The five-step workflow

Same routine every time, regardless of supplier or invoice type.

1. 01
   Receive the invoice.

   Paper at the back door, PDF in your email, or in-app from supplier portals. Don't move it until you've done step 2.

2. 02
   Scan or snap the total.

   On the expenses screen, new entry. Date, supplier, amount, category. 20 seconds.

3. 03
   Tag the day.

   Defaults to today; backdate if the invoice covers a delivery that happened earlier. 5 seconds.

4. 04
   Update COGS if a price moved.

   Quick scan of unit prices vs what's in products. Only update the ones that changed. 20 seconds on a typical invoice, longer if everything moved.

5. 05
   File it.

   Three piles on the wall: paid, unpaid, archived. Move the invoice to its pile. The physical pile is your reconciliation backstop. 10 seconds.

Paper vs email vs PDF: handling all three at the same time

Most small businesses get a mix. The bakery hands a paper slip. The wholesaler emails a PDF. The utility sends a monthly statement through a portal. Without a single capture point, each format spawns its own pile and its own delay.

The fix is to funnel everything into one inbox before you enter. Three pragmatic moves:

1. Paper invoices: the moment they arrive, drop them in a single physical inbox tray. Not the apron, not the till — one tray, one location.
2. Email/PDF invoices: forward to a dedicated email address (e.g. invoices@yourshop.com) or set up a filter that auto-labels them. They all land in one inbox view.
3. Portal invoices: set a single weekly check (Monday morning, ten minutes) to download anything new and add it to the physical tray.

Now the daily five-step runs against a single inbox, not three. The whole flow simplifies dramatically. See how to record a supplier invoice in nouz for the in-app version.

When the invoice price has moved (step 4 in detail)

Step 4 — checking for price changes — is the step most owners skip. It's also the one that compounds the most over time. A 5% supplier price increase, missed for three weeks, costs you 5% on every product that uses that ingredient for three weeks. On a single ingredient that's small money; across the four or five ingredients that move in a typical month, it adds up to real EBIT.

The three-pile rule for the wall

After step 5, the physical invoice goes onto one of three piles on a wall, clipboard, or accordion file. Most owners try to over-engineer this. Three is enough.

• Unpaid. Invoices waiting for payment. Sorted by due date. Friday afternoon, you sweep this pile and pay what's due.
• Paid (current month). Recently paid, not yet sent to the accountant. Monthly sweep.
• Archived (prior months). Sent to the accountant. Kept for seven years per most jurisdictions.

I switched from "deal with invoices Friday" to "deal with each one when it lands" and the Friday pile literally went to zero by week three. I got an hour of my Friday back. The hour was nice. The hour spent not feeling vaguely guilty about the pile was better.

If you're still on a spreadsheet, the daily workflow still applies — just enter each invoice into the variable-costs column on the day it arrives instead of batching. See the daily-P&L template for the spreadsheet shape. If you want the version with auto-categorisation and supplier-history lookup, the expenses screen in nouz handles it natively.

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