Restaurant · Guide · Updated July 2026

Variable Costs vs. Fixed Costs in a Restaurant: A Practical Budgeting Guide

The difference between a restaurant owner who travels freely and one who works 15-hour days, seven days a week, comes down to the numbers. Specifically, it comes down to knowing which costs you can control and which ones you cannot. Get these percentages right and you have a plan. Ignore them and you are guessing.

What Are Fixed Costs?

Fixed costs do not change regardless of how much you produce or sell. Rent is the clearest example. Whether your kitchen makes ten burgers or a thousand burgers tonight, your landlord gets the same check. That is a fixed cost: it stays fixed no matter what your output is.

In a restaurant context, fixed costs include rent and miscellaneous items like depreciation and interest on any loans you are carrying. Together, these two buckets should account for no more than 20% of your revenue. Rent on its own should sit between 5% and 10% of revenue. Depreciation and loan interest combined should not exceed 10%.

What Are Variable Costs?

Variable costs move with your volume. The more you sell, the more they cost you. Cost of goods sold is the textbook example: make more burgers, buy more patties, spend more money. Labor also fits here because your scheduling, staffing levels, and hours worked all shift with how busy you are.

Variable costs break down into three main buckets:

Cost of Goods Sold (COGS). This covers your food cost and your beverage cost. Combined, COGS should not exceed 30% of revenue. If your food cost alone is eating 50% of your revenue, that is a serious structural problem, not a rounding error.

Labor. Full-time staff, part-time staff, bonuses, incentives, recruitment, and training costs all live here. Labor should not exceed 25% of revenue. Overstaffing by even a few shifts per week can quietly drain $3,000 to $4,000 per month that should have been your profit.

Operating Costs. Utilities, marketing, office expenses, and miscellaneous line items go here. Keep operating costs below 15% of revenue. Spending $10,000 to $20,000 on marketing when you do not yet have a proven customer acquisition system is rarely justified early on.

Your total variable costs should stay below 70% of revenue.

What Is Prime Cost and Why Does It Matter?

Prime cost is the industry term for COGS plus labor added together. It is the single most watched number in a well-run restaurant because those two costs represent your largest levers.

At the benchmarks above (30% COGS, 25% labor), your prime cost lands at 55%. The target range is 55% to 70%. If your prime cost is creeping above 70%, something is broken in either your food purchasing, your scheduling, or both. Fix the prime cost first before worrying about anything else.

How the Concept You Choose Shifts the Balance

The 30%/25% split between COGS and labor is a starting point, not a rigid rule. Your concept changes the balance.

In fine dining, labor runs higher than food cost. You are paying for skilled servers, sommeliers, and experienced kitchen staff because the customer experience is the product. Food cost can be managed tightly, but your payroll will be heavier.

In quick service, it flips. Think of a fast-casual concept: the priority is speed and throughput, not table-side hospitality. COGS will typically be higher than labor because you are moving volume and keeping staff lean.

Know your concept. Budget accordingly. The percentages are a map, not a GPS giving you turn-by-turn directions.

How to Use These Percentages as a Planning Tool

This is where the benchmarks become practical. Start with your projected monthly revenue and work backward.

Take a hypothetical shop projecting $24,500 in monthly revenue.

Rent: 5% to 10% of $24,500 is $1,225 to $2,450. That is the range you can afford. If a landlord quotes you $4,000 per month, that location will be a battle from day one. Walk away or negotiate hard. Use this number when you are scouting locations, before you fall in love with a space.

Labor: 25% of $24,500 is $6,125. That is your monthly labor ceiling. If poor scheduling or overstaffing pushes your labor bill to $10,000, you just handed $3,875 to $4,000 back to payroll that should have come home with you.

Run the same math for every cost category. You will quickly see which line items are under control and which ones need attention.

Why Most Operators Never See a Profit

The answer is not that restaurants are inherently unprofitable. The answer is that most owners do not plan for profit. They pay every bill, every vendor, every staff member, and they hope something is left over at the end of the month. There is almost never anything left over when that is the approach.

The plan described here flips that logic. You budget variable costs under 70%, fix costs under 20%, and you protect that 10% profit margin from the start. Profit is not what remains after expenses. Profit is an expense you pay yourself first by designing your cost structure to make room for it.

I did not always operate this way. Early in building 720 Sweets, I avoided the math and ignored the bookkeeping. The result was a $200,000 fine from Canada Revenue Services. That pain was avoidable. We recovered, expanded to seven locations, and eventually sold the chain, but I learned that lesson the hard way so you do not have to.

What Happens If One Cost Is Higher Than the Benchmark?

The percentages are benchmarks, not pass/fail grades. If your COGS lands at 32% instead of 30%, the business is not ruined. The point is to notice it, understand why, and work to bring it down.

What you cannot do is let multiple buckets run over simultaneously. A 47% COGS sitting next to a 25% labor cost and 15% operating cost leaves almost nothing for fixed costs and zero for profit. The percentages interact. One high bucket can sometimes be offset by a low one, but there is a ceiling. Total variable costs above 70% combined with fixed costs above 20% means your structure is spending more than 90 cents of every revenue dollar before you see a cent of return.

Run your own numbers. Lay them out in the same buckets. See where you stand honestly. That is the starting point for fixing anything.

The Bottom Line

Fixed costs stay the same no matter what you sell. Variable costs move with your volume and demand constant management. Budget COGS under 30%, labor under 25%, operating costs under 15%, rent under 10%, and plan for 10% profit from the beginning. The operators who build businesses that give them freedom are not luckier than the ones grinding 15-hour days. They just did the math first.

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