This is the leak almost nobody watches — and in an inflationary market, it's the one bleeding the most. Suppliers raise prices constantly, a line item at a time, across dozens of products. No single invoice looks alarming, so it slips by until the P&L shows a food cost that jumped and no one can say why. This guide shows you how to catch price creep as it happens and act before it costs you a month.
Catching every price bump by hand means living in invoices. Lowboy watches them for you and tells you what moved — so your attention stays on the plate, not the paperwork.
A restaurant buys hundreds of items from several suppliers, and prices move all the time — sometimes up two percent, sometimes eighteen, often without any notice on the invoice. The problem isn't that the increases are hidden; it's that they're scattered and small. Ribeye up 8%, oil up 12%, romaine up 20% for a bad-weather week — each one buried among a hundred other lines. By the time it aggregates into a visibly worse food cost on your monthly P&L, you've already paid the higher price on every order for a full month, with no re-pricing to offset it.
The fix is to stop reading invoices as one-time bills and start reading them as a time series. When you can see the price of an item across every invoice, a creep that's invisible in isolation becomes obvious. That record is called a price book.
A price book is a running log of the price per standard unit for every item you buy, dated over time. Same item, same unit, tracked invoice to invoice — so you're always comparing like for like. Here's the idea for a handful of items across three months:
| Item | Jul | Aug | Sep | Change |
|---|---|---|---|---|
| Ribeye (lb) | $13.20 | $13.60 | $15.60 | ▲ 18%flag |
| Fryer oil (35 lb) | $28.40 | $29.10 | $31.80 | ▲ 12%flag |
| Romaine (case) | $24.00 | $26.50 | $28.80 | ▲ 20%flag |
| AP flour (50 lb) | $18.90 | $18.90 | $19.10 | ▲ 1% |
| Chicken thigh (lb) | $2.56 | $2.40 | $2.30 | ▼ 10% |
Read as a series, the movers jump out. Ribeye up 18% isn't a rounding error — it's a real hit to every dish that uses it, and a clear signal to act. The flat and falling items tell you where not to spend attention. A simple percentage-change formula does the flagging:
Tracking is only half the value; the point is to act. When ribeye jumps 18%, the questions you want answered in seconds are: which dishes use it, how much did their margin drop, and what price restores it? That's the difference between knowing a price went up and knowing what to do about it. One caught increase, re-priced promptly, frequently covers far more than the cost of the tool watching for it — which is exactly why this is the leak worth systematizing first.
This is what Lowboy was built for. You already handle invoices; snap them and Lowboy builds and maintains your price book automatically. It watches every unit price across every supplier, flags the movers the moment they move, and — because it's one connected system — traces each increase straight to the dishes it touches and the margin it costs. Computed from your numbers, never guessed, with no spreadsheet to keep up and no workflow to change. The sous-chef that tells you "ribeye up 18% — re-price the steak to hold margin" before month-end, not after.
It's POS-agnostic — Square today, Clover and Toast coming, or just snap it. One flat $149/mo (or $1,490/yr — two months free), whole crew included, 30-day money-back — an amount one caught price increase often covers on its own. See the movers hiding in your own invoices with the free food-cost audit, or check a dish with the food cost % calculator.
Do the math: a kitchen spending about $50,000 a month on food that trims that by just 1% saves roughly $500 a month — about 3.4× the $149 plan. One caught price hike or one re-priced dish usually clears it.
Add the hours back, too — no spreadsheet nights, no manual invoice entry, no rebuilding the prep list when the menu changes.
Less time on the back office, more time on the food, your crew, and the reason you opened.
Get your free audit →