Know Your Numbers

The 5 Numbers Every Restaurant Owner Must Track Weekly

If you’re only looking at your numbers once a month, you’re already behind.

By the time your monthly financials come in, the damage is done. Margins are gone. Cash is tight. And you’re left wondering where things went wrong.

The most profitable restaurant owners don’t wait for monthly reports. They track a few key numbers every single week.

Not dozens. Not complicated dashboards.

Just five.

The 5 Numbers at a Glance

MetricTarget RangeWhy It Matters
Prime Cost55% – 65%Tells you if you’re actually profitable
Food Cost %28% – 35%Controls your menu margins
Labor Cost %25% – 35%Your biggest controllable expense
Weekly SalesTrend UpHelps you plan and adjust quickly
Cash in BankAlways PositiveKeeps your business alive

1. Prime Cost (Your Most Important Number)

Prime cost = food cost + labor cost

This is the single most important number in your business.

Why? Because it controls whether you’re profitable or not.

Target:
👉 55%–65% of revenue (depending on concept)

If your prime cost creeps above that range, your profits disappear fast.

What to watch weekly:

  • Food cost spikes (waste, theft, poor ordering)
  • Labor creeping up (overstaffing, slow shifts)

If you only track one number… make it this one.

2. Food Cost Percentage

You probably already look at this—but not often enough.

Food cost tells you how efficiently you’re turning inventory into revenue.

Formula:
Food Cost ÷ Total Sales

Target:
👉 Typically 28%–35% (varies by concept)

What to watch weekly:

  • Sudden increases (portion control issues, spoilage)
  • Vendor price changes
  • Menu items that are quietly killing your margins

Small changes here have a huge impact on profit.

3. Labor Cost Percentage

Labor is your most controllable expense—and one of the easiest to let get out of hand.

Formula:
Labor Cost ÷ Total Sales

Target:
👉 Typically 25%–35%

What to watch weekly:

  • Scheduling inefficiencies
  • Overtime creeping in
  • Sales slowing down without labor adjusting

A slow Tuesday with a full staff can wipe out your margin for the day.

4. Weekly Sales (Compared to Last Week & Last Year)

Revenue alone doesn’t tell the full story—but ignoring trends is a mistake.

You need to know:

  • Are sales going up or down?
  • Is this normal for the season?
  • Are promotions actually working?

What to watch weekly:

  • Week-over-week changes
  • Year-over-year comparisons
  • Unexpected dips (weather, events, competition)

Sales trends help you make better staffing and purchasing decisions before problems hit.

5. Cash in the Bank

This one sounds obvious—but too many owners avoid looking at it.

Profit on paper doesn’t matter if you don’t have cash to pay bills.

What to watch weekly:

  • Current bank balance
  • Upcoming expenses (payroll, rent, vendors)
  • Whether you’re trending up or down

Cash flow problems don’t show up overnight—they build quietly.

Tracking this weekly keeps you in control.

Why Weekly Tracking Changes Everything

Most restaurant owners operate reactively.

They find out there’s a problem after the month ends… after the money is gone.

Tracking these five numbers weekly flips that.

You start catching issues early:

  • Food cost creeping up? Fix it this week.
  • Labor too high? Adjust the schedule tomorrow.
  • Sales dipping? Run a promotion now—not next month.

This is how profitable restaurants actually run.

The Problem Most Owners Run Into

Knowing these numbers is one thing.

Actually tracking them consistently—and accurately—is another.

Most owners:

  • Don’t trust their numbers
  • Don’t have clean books
  • Don’t have time to calculate everything weekly

So they guess.

And guessing is expensive.

Want Help Tracking the Right Numbers?

At Lyons Ledger, we help restaurant and bar owners get clear, reliable numbers—so you can actually run your business with confidence.

If you’re not sure what your prime cost is… or you don’t trust your numbers… that’s exactly where we come in.

We’ll walk through your numbers together—and show you exactly where you’re making money (and where you’re losing it).