Vero -- Tools for Restaurant Operators
Prime cost -- food and beverage cost plus total labor cost -- is the single number that predicts whether a restaurant will be profitable week to week. Most operators track food cost alone and miss the margin leaks hiding in labor; this page walks through the exact formula, a worked example for four restaurant types, the target ranges you should be aiming for, and a weekly tracking routine you can start immediately.
Food cost as a percentage of sales is the metric most operators learn first, and it is useful -- but it is incomplete. A restaurant can run a healthy 28% food cost and still lose money every week if labor is sitting at 42%. The two numbers are linked in ways that a food-cost-only view hides. When you cut prices to drive volume, labor cost per cover often rises because you need more staff to serve more guests. When you add a brunch service, you add a full shift of labor for incremental revenue. Prime cost captures both variables in a single figure and gives you an early warning before cash flow tightens.
The formula is straightforward:
Prime Cost = Cost of Goods Sold (COGS) + Total Labor Cost
Prime Cost Percentage = Prime Cost / Total Sales x 100
COGS means the cost of all food and beverages sold -- raw ingredients, packaging, and any items consumed or comped during service. If you track opening stock, add purchases, and subtract closing stock, that figure is your COGS for the period. Do not use purchase invoices alone: that includes stock sitting in your walk-in, not stock that turned into revenue.
Labor includes every rupee spent on people: wages, salaries, overtime, allowances, employer PF contributions, ESIC contributions, and any staff meal benefit you account for. If a manager is on payroll, their full cost-to-company goes in. If you use contract staff through an agency, the agency billing goes in too. Owners who take a salary or a draw should include that figure -- leaving out owner compensation makes the numbers look better than the business actually performs.
The widely-accepted industry target is 55--65% of total sales. Full-service restaurants with table service and a full kitchen brigade typically run 60--65% because labor intensity is higher. Quick-service and counter-service operations can target 50--58% because labor per rupee of revenue is structurally lower. A bar running high-margin beverages alongside food can sometimes achieve below 55%. If you are above 68%, every fixed cost line -- rent, utilities, packaging, marketing -- is fighting for whatever remains, which is usually not enough.
| Restaurant type | Weekly sales | COGS | Labor cost | Prime cost | Prime cost % | Verdict |
|---|---|---|---|---|---|---|
| QSR / fast food | 2,10,000 | 63,000 (30%) | 44,100 (21%) | 1,07,100 | 51% | Strong |
| Casual dine-in | 3,50,000 | 1,05,000 (30%) | 1,05,000 (30%) | 2,10,000 | 60% | Healthy |
| Fine dining | 5,00,000 | 1,75,000 (35%) | 1,60,000 (32%) | 3,35,000 | 67% | Tight |
| Bar + food | 4,20,000 | 1,05,000 (25%) | 1,05,000 (25%) | 2,10,000 | 50% | Strong |
The fine-dining example at 67% is not an immediate crisis if the restaurant commands premium pricing and has low rent relative to revenue. But it is a warning signal worth investigating: is the kitchen overstaffed for slower trading days? Are any high-labor, low-margin menu items worth cutting or repricing? Could the lunch service be reduced without a meaningful revenue impact? Prime cost at 67% combined with 25% fixed costs leaves only 8% for operating profit -- one bad month or one large equipment repair eliminates it.
The bar-plus-food example at 50% works because beverage gross margin is typically 70--80%, which pulls the blended COGS well below what a food-only operation achieves. If that bar ever shifts its revenue mix toward food delivery, the COGS line will rise and prime cost will follow. Track the revenue split (food vs. beverage) alongside the prime cost number so you understand what is driving any change.
Mistake 1: Calculating monthly instead of weekly. A monthly calculation tells you that you had a problem four weeks after the problem started. By then it has repeated three more times. A bad scheduling decision, a delivery week with high wastage, or a fortnight of heavy discounting is invisible in monthly numbers until it is too late to correct in the same period. Weekly calculation -- even an approximate one based on estimated stock counts -- gives you a number you can act on before it compounds.
Mistake 2: Using net sales instead of gross sales as the denominator. If your POS or reporting tool shows revenue after platform deductions, discounts, or tax, you are dividing by a lower number than reflects actual business volume. Use gross sales (before Swiggy/Zomato commissions, before discounts, before GST is stripped out) as the denominator. Track platform fees separately as a cost line. Otherwise a week with heavy delivery volume will show an inflated prime cost percentage that is a reporting artifact, not a real operating problem.
Mistake 3: Treating COGS as "what I purchased" rather than "what I sold." Purchases and COGS are not the same. Opening stock plus purchases minus closing stock equals COGS. If you skip the closing stock count, every rupee of waste, shrinkage, over-ordering, and staff consumption goes into your prime cost as if it were sold. This inflates the number and hides the real driver. A physical stock count at the end of each week is the minimum standard; daily counts for high-value beverages is better practice for bars.
Mistake 4: Excluding indirect labor because it feels like an overhead. Owner salary or draw, manager salary, HR processing fees, and recruitment costs all represent rupees spent on people to run the restaurant. Classifying them as "admin" rather than labor makes prime cost look artificially low and makes financial projections for growth inaccurate. The test: if that person stopped showing up, would the restaurant need to pay someone else to do their work? If yes, the cost belongs in labor.
You need four numbers collected consistently on the same day each week. Sunday evening or Monday morning works well for most restaurants because it closes out the trading week cleanly.
1. Total gross sales for the week -- from your POS daily report or cashbook. Add up each day's gross sales. Do not deduct anything at this stage.
2. COGS for the week -- do a physical stock count of food and beverage on Sunday evening. The formula is: (Opening stock + Purchases received this week) minus Closing stock. If this is your first time doing a count, establish a baseline today and start tracking from next week. An approximate count is better than no count.
3. Total labor cost for the week -- add wages paid or accrued for all staff plus employment costs. If you pay salary monthly, divide the monthly labor budget by 4.3 and use that as your weekly figure until you have actual weekly data. Over time, refine this to reflect seasonal scheduling changes.
4. Prime cost percentage -- (COGS + Labor) divided by Sales, multiplied by 100. Write this number down in the same cell of the same spreadsheet every week so you can see the trend, not just the point-in-time number.
After four consecutive weeks of data, you can see patterns: prime cost spikes when a public holiday adds overtime labor; it drops in weeks with a catering event where revenue is high but labor is fixed; it creeps upward slowly when ingredient costs rise while menu prices stay flat. The trend over four to eight weeks is what tells you where to intervene, not any single week's number.
A realistic first target for a business that has never tracked prime cost before: get the number below 65% and measure it consistently for 60 days. Optimization comes after measurement is reliable. If you are currently above 70%, the fastest lever is usually labor scheduling -- look at shift coverage during slow trading periods (weekday lunches, late-night slots) before changing any menu prices.