A truck holds one day of stock and has nowhere to hide a mistake. Here's the counting system that fits in a phone and actually gets done.
By the Food Truck OS team — built alongside Kicking2Cones, a working Oklahoma food truck · Updated August 2026
Restaurant inventory advice assumes a stockroom, a walk-in, and someone with a clipboard on Monday morning. A truck has a reach-in, six feet of prep space, and an owner who is also the cook, the cashier and the driver. Everything you carry costs you space and fuel, and anything you run out of at 12:40pm is a sale you can't make for the next two hours. The system has to be small enough that it still happens on a bad day.
A par level is simply how much of an ingredient should be on the truck when service starts. Set one for every item that can stop you selling a menu item — proteins, buns and tortillas, cheese, the sauce everyone orders, cups and lids. Pick the number from your busiest realistic day, not your best day ever, then add roughly 15% buffer. Order back up to par; never order from memory.
At the end of every service, count only the ten things that actually gate a sale. Write the numbers down before you drive away — not at home, not tomorrow. That short list does three jobs at once: it produces tomorrow's prep list, it flags anything that's about to fall below par, and it gives you a daily usage number you can compare against what you sold. When the two diverge, you've found waste, over-portioning, or something walking off the truck.
Blended food cost hides the problem. Cost each menu item ingredient by ingredient — protein by the ounce, bun, cheese, sauce, the ramekin, the container, the napkin — and divide by menu price. Now you know which best-seller is a plowhorse: beloved, and quietly earning nothing. Two rules keep the number true: re-cost your top three items every time a supplier invoice jumps, and re-cost anything you re-portion "just a little." For the pricing side of this math, see menu ideas and menu engineering.
Keep a waste log for two weeks — a note on your phone is enough. Record what you threw away, how much, and why (spoiled, overprepped, dropped, comped, remade). Almost every truck discovers the same thing: waste concentrates in two or three ingredients, usually prepped garnishes and one over-ordered produce item. Fixing those two beats a general resolution to "waste less," which never survives a busy Saturday.
A spreadsheet is genuinely fine while one person does every shift. It breaks when staff work the window without you: the counts stop matching sales and nobody knows which number is wrong. Tracking stock in the same system that rings the orders fixes that — counts draw down as items sell, low-stock alerts fire before service rather than during it, and the food-cost number updates itself. That's what food truck management software is for; it's also the reason inventory and POS belong in one place rather than two.
Count your top ten ingredients daily at close — it takes four minutes and it's what drives tomorrow's prep list. Do a full count weekly, on the same day, before your commissary supply run. Monthly-only counting is how trucks discover a 40% food cost eight weeks too late.
Most trucks target 28–32% of sales. Under 25% usually means you're underportioning or overpricing for your market; over 35% means waste, theft, or prices that haven't moved since your supplier's last increase. Track it monthly, per item, not just as one blended number.
The amount of an ingredient you want on the truck at the start of service. Set it at your busiest realistic day plus a small buffer, then order back up to par instead of guessing. Par levels are the single change that stops both the sold-out sign and the walk-in full of spoiling produce.
A spreadsheet works until the counts stop matching sales — which happens the first week someone else works the window. The advantage of tracking inventory in the same system that takes the orders is that counts draw down as you sell, so the number you check at 4pm is real rather than the number you last typed in on Sunday.
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