Blog

Prime cost: the number every restaurant owner should watch

19 October 2026 · Restaurant Accountant

If you only look at one number each month, make it prime cost. It combines the two biggest costs in any restaurant: what you spend on food and drink, and what you spend on staff.

How to calculate prime cost

Prime cost = cost of goods sold (food + beverage) + total labour cost

Labour cost should include wages, on-costs such as superannuation, and any contractors working in the restaurant. Divide prime cost by total sales to get prime cost as a percentage.

Why it matters

Rent and other overheads are mostly fixed. Prime cost is the part you can actually control week to week - through rosters, portion sizes, menu pricing and purchasing. When prime cost rises, profit falls almost dollar for dollar.

How to bring it down

  • Match rosters to your busy and quiet trading periods
  • Review the margin on each menu item, not just total sales
  • Reduce waste with better prep planning
  • Check supplier invoices against what was ordered

Our dashboards show wage cost and cost of goods every week, so you can see the trend at a glance. Get in touch.

General information only. Not personal tax advice. Contact us for advice on your situation.

Keep reading

More for restaurant owners

Ready when you are

Talk to us about your venue

Start with a short call about where your numbers stand and what to fix first.

↑