Restaurant inventory 101 — auto-deducting stock from recipes
If your kitchen runs on "I'll check the fridge" you're leaving 4–8% of revenue on the floor every month, mostly in spoilage, mystery shortages, and 86'ing an item mid-service. The good news: a workable system is closer to "spreadsheet + scale + discipline" than "enterprise software".
The three numbers that matter
You don't need to track 400 SKUs to start. You need three numbers for each of the 30 most-used ingredients:
- Current count — what's in the fridge / shelf / freezer right now
- Par level — what you want on hand at the start of service
- Unit cost — what you paid per kg / litre / unit
Everything else — supplier orders, recipe costs, waste tracking — is downstream of those three numbers.
From counts to recipes to auto-deduction
Once you have counts, the next step is connecting them to the menu. A recipe says: "One Margherita uses 220g mozzarella, 150g dough, 80ml sauce, 8g basil." With recipes in place, every prepared item automatically deducts its ingredients from stock. No end-of-day counting, no "did the chef remember".
Why this matters operationally: when mozzarella drops below your par level, the system can auto-86 the Margherita before service, not at 8pm when 8 tables have already ordered. The cost of one auto-86'd item is zero. The cost of one mid-service stock-out is a lost table.
What to track (and what not to)
Track: proteins, cheese, fresh produce, anything with a shelf life under 7 days, and your top 20 ingredients by spend.
Don't track: salt, pepper, oil in the 1L squeeze bottle. The cost of counting these exceeds the cost of the waste.
Counting cadence
- Daily (end of service, 5 min): proteins, fresh produce, anything that "ran out today".
- Weekly (closing, 30 min): everything else, plus walk-in dry goods.
- Monthly: supplier reconciliation, full physical count, cost review.
What an integrated system buys you
When the POS, KDS and inventory are the same platform, the loop closes itself:
- Order placed → ticket on KDS
- Chef marks item "ready"
- Recipe ingredients deduct from stock automatically
- When an ingredient hits zero, the menu item it powers is auto-86'd
- Low-stock alert pushes to the manager's phone
- Reorder list compiles for the next supplier run
No double-entry, no pen-and-paper, no "the spreadsheet was outdated". Same source of truth for the cashier, the chef and the owner.