Restaurant Prime Cost Calculator

How this calculator works

Prime cost is the single most-watched operating metric in the restaurant industry. It is the sum of cost-of-goods-sold (food and beverage) and total labor cost (hourly wages, salaried management, payroll taxes, and benefits), expressed as a percentage of total sales. The calculator computes food cost as a percentage of sales, labor cost as a percentage of sales, and reports the sum — the prime cost — against the National Restaurant Association industry benchmarks: under 60% healthy, 60-65% at-risk, over 65% unprofitable. When prime cost exceeds the 60% target, the calculator also reports the monthly sales lift required to return to 60% while holding cost dollars constant.

The 60% target is an industry convention, not a statutory requirement. It captures the empirical observation that rent, utilities, marketing, insurance, debt service, and operator return must come out of the residual after prime cost — and that for typical occupancy and overhead ratios in full-service restaurants, the residual at 60% prime cost is just adequate to cover those fixed costs and leave operating profit. Above 60%, the shop is paying its bills but has no margin for error; above 65%, the shop cannot cover fixed costs at all. The targets shift modestly by concept type — quick-service can run lower because the cook line is leaner; fine dining can run higher because the average check absorbs more cost — but the 60% / 65% screening thresholds apply across concepts as a first-cut diagnostic.

Operators run prime cost monthly at minimum, weekly in mature shops, because it captures the two largest controllable expense categories in a single number and surfaces drift before it reaches the bottom of the P&L. The discipline of looking at prime cost on a weekly cadence is one of the cleanest separators between shops that respond to drift in real time and shops that discover problems only at the monthly close.

This is an operating diagnostic. It is not professional advice. For consequential decisions on lease commitments, capital structure, or partnership economics, consult a licensed CPA or a restaurant-specific operating consultant.

The FLSA tip credit under 29 USC § 203(m)

The federal Fair Labor Standards Act permits an employer of tipped employees to take a "tip credit" against the federal minimum wage of $7.25 per hour, equal to the difference between the federal minimum and the federal tipped minimum cash wage of $2.13 per hour. The maximum federal tip credit is therefore $5.12 per hour. The mechanism is straightforward: an employer of tipped staff may pay a cash wage as low as $2.13 per hour if the tip income the employee actually receives is sufficient to bring total compensation (cash wage plus tips) up to at least the regular minimum wage of $7.25. If tips fall short in any given workweek, the employer must make up the difference.

Three statutory conditions must be satisfied before an employer may claim the tip credit. First, the employer must give the tipped employee written notice of the tip-credit arrangement before claiming it — the notice must identify the cash wage paid, the additional amount claimed as a tip credit, that the tip credit cannot exceed the value of tips actually received, that all tips received are retained by the employee except for valid tip-pool participation, and that the tip credit is not applied unless the employee has been informed of the provisions. Second, the employer must permit the tipped employee to retain all tips received except for amounts contributed to a valid tip pool. Third, the tipped employee must customarily and regularly receive more than $30 per month in tips — the threshold definition of a "tipped employee" under the statute. The Department of Labor enforces these conditions through 29 CFR § 531.

Seven states forbid any tip credit entirely: California, Oregon, Washington, Nevada, Minnesota, Montana, and Alaska. In those jurisdictions, the employer must pay tipped employees the full state minimum wage as cash wage — the federal tip-credit mechanism is unavailable. The calculator's state selector flags these no-tip-credit jurisdictions and uses the full state minimum wage as the wage floor.

State minimum wage variation

The federal minimum wage of $7.25 per hour under 29 USC § 206(a)(1) is a floor, not a ceiling. As of 2026, the federal floor controls in roughly twenty states and is exceeded — often significantly — in the remainder. California, Washington, Connecticut, New Jersey, New York, Massachusetts, the District of Columbia, and a growing list of state-and-local jurisdictions have adopted minimum wages in the $15 to $17.50 range. Some states index the minimum wage to inflation; some statute-set the level and revise it periodically through the legislative process.

For restaurant operators, the practical consequence is that the labor model for an otherwise identical concept can vary by 50% or more across state lines. A line cook in Texas at $7.25 per hour costs the employer materially less per scheduled hour than the same cook in California at $16.50 per hour, before any difference in benefits or payroll burden. For tipped employees the variation is even more dramatic: in a federal-floor state with the federal tip credit available, the cash wage is $2.13 per hour; in California, the cash wage is the full $16.50.

The calculator includes a state selector that drives the minimum-wage floor used in the labor calculation. The current values reflect the Department of Labor state minimum-wage table as of 2026 and are also published by each state's labor agency. The DOL maintains a consolidated reference table at the Wage and Hour Division state-minimum-wage page; for cities and counties with local minimum-wage premiums above the state floor (Seattle, Denver, Minneapolis, and parts of California), consult the local labor agency directly because the calculator models state-level minimums only.

Computing labor cost correctly

Total labor cost is more than the sum of hourly wages on the schedule. The figure that matters for prime cost is the fully-loaded employer cost — cash wages plus salaried management plus the employer-side payroll tax burden plus employer-paid benefits. Each layer materially shifts the labor-cost line.

Cash wages. Hourly wages paid to FOH (servers, hosts, bartenders, bussers, food-runners) and BOH (line cooks, prep, dish, butcher, baker, pastry) staff, summed across the schedule for the period. The calculator multiplies (FOH headcount + BOH headcount) by average hours per week by 4.333 weeks per month to compute monthly hourly-wage dollars. For shops in a tip-credit jurisdiction with heavy tipped-employee mix, use the blended cash-wage figure the employer actually pays — not the regular minimum wage — because the tip income flows from guest to employee and never enters the employer's labor cost line.

Salaried management. Gross monthly salary for the general manager, executive chef, sous chef on salary, and assistant managers on salary. Use the gross figure before any payroll taxes or benefits. Hourly assistant managers belong in the hourly headcount, not the salaried line.

Payroll taxes. Employer-side FICA at 7.65% (6.2% Social Security on the first $168,600 of wages plus 1.45% Medicare on all wages), plus state unemployment (SUTA, 1% to 5% depending on state and experience rating), plus federal unemployment (FUTA, 0.6% effective on the first $7,000 of wages per employee after the standard credit). A reasonable composite is 9% to 12% of cash wages; new operations with no SUTA experience history run higher. Workers' compensation insurance is usually accounted for in the benefits line, not the payroll-tax line.

Benefits. Employer-paid health insurance contribution, 401(k) match, paid time off accrual, workers' compensation insurance, and group life. Small operators commonly run 2% to 5% of wages; mature full-benefit operations can run 15% to 20%. The calculator applies the benefits rate to both hourly cash wages and salaried management because both groups typically participate in the same benefit programs.

The calculator applies the combined burden (payroll tax rate plus benefits rate) multiplicatively to the sum of hourly cash wages plus salaried management. The resulting total labor dollars figure is what the bank account actually pays out for labor each month.

Computing food cost correctly

Food cost is cost-of-goods-sold for food and beverage as a percentage of total sales. The denominator is straightforward — total monthly sales net of comps and discounts. The numerator is where most DIY calculations go wrong.

The defensible food-cost numerator is the actual usage figure, computed as beginning inventory plus purchases minus ending inventory:

Food COGS = Beginning Inventory + Purchases − Ending Inventory

This is the figure that accountants call the "ideal" or "actual" food cost, and it differs from the purchases figure (what the operator paid the vendor during the period) whenever inventory levels shift. A shop that built up inventory during the month — heavier purchasing than usage — will show a purchases figure higher than the true food cost; a shop that drew down inventory will show purchases lower than true food cost. Over short windows the difference is large enough to materially mislead the prime-cost calculation.

Beverage cost — alcohol, beer, wine, soft drinks, coffee — belongs in the same numerator if beverage is a meaningful share of revenue. Separating food and beverage cost into distinct ratios can be useful for menu engineering and beverage-program analysis, but for prime cost the combined COGS figure is the standard.

Two practical mechanics matter. First, the inventory counts driving the calculation must be performed on a consistent calendar; weekly counts on Friday closing yield weekly food cost, monthly counts on the period-ending day yield monthly food cost. Inconsistent counting dates introduce noise that swamps the signal. Second, the inventory valuation method (last-cost, average-cost, FIFO) should be consistent across periods; switching methods mid-year produces phantom food-cost variances that have no operational meaning.

Operators who lack a disciplined inventory process default to using purchases as the food-cost figure. This is acceptable as a rough approximation in the first months of an operation but should be replaced with actual-usage accounting as soon as the inventory cadence is established. Industry benchmarks (28% to 32% for full-service, lower for QSR, higher for fine dining) assume the actual-usage convention.

What the industry benchmarks mean

The 60% / 65% prime-cost thresholds are screening diagnostics drawn from the National Restaurant Association annual Restaurant Industry Forecast and from decades of operator practice across concept types. They represent empirical observations about restaurant economics, not statutory or accounting requirements. The thresholds carve three operating bands.

Under 60% — healthy. The shop is operating in the range where the residual after prime cost is adequate to cover rent, utilities, marketing, insurance, debt service, and operator return, with operating profit left over. A shop at 55% prime cost has 45% of every sales dollar available for fixed costs and profit; a shop at 58% has 42%. Healthy shops have the financial bandwidth to absorb sales softness, food-cost spikes, and one-time expenses without falling into deficit.

60% to 65% — at-risk. The shop is paying its bills but has no margin for error. The residual after prime cost is adequate for current fixed costs but cannot absorb adverse events. A 5% same-store sales decline, a 15% beef-price spike, or a labor-overrun on a slow weekend pushes the operation into the red for the period. Most shops in this band are profitable on a trailing-twelve-month basis but operate in a stressed cash position and miss occasional debt-service obligations.

Over 65% — unprofitable. The shop cannot cover fixed costs at the current cost structure. A shop at 70% prime cost has only 30% of every sales dollar left for everything else — rent, utilities, marketing, insurance, debt, owner return. For full-service concepts in most US markets, 30% is not enough to cover even the rent-and-utility minimum, let alone the rest of the operating expense stack. A structural fix is required: menu re-engineering to lift average ticket or improve product mix, labor restructure to reduce hours and right-size the schedule, price increase to lift the revenue line, or renegotiation of food-cost contracts to compress the COGS line. Most often the answer is a combination.

The component split varies by concept. A healthy QSR may run 28% food cost plus 28% labor cost equals 56% prime cost — both components below the all-concept average because QSR menus are engineered for ingredient overlap and the cook line is leaner. A healthy casual dining shop may run 30% food cost plus 32% labor cost equals 62% prime cost — slightly above the 60% threshold but well-positioned given the higher service expectations. A healthy fine dining shop may run 35% food cost plus 32% labor cost equals 67% prime cost — above the all-concept threshold but acceptable because the average check is high and the per-cover contribution dollars are large.

Required sales lift to reach 60%

When prime cost exceeds the 60% target, the calculator reports the monthly sales lift required to bring prime cost back to 60% while holding cost dollars constant. The formula is direct:

Required Lift = (Cost Dollars / 0.60) − Current Sales

The diagnostic is the most actionable single number the calculator produces. Every operator over the 60% line is implicitly running either a sales-growth project, a cost-reduction project, or both. The required-lift figure names the size of the sales-growth side of that equation. An operator running 65% prime cost with $200,000 in monthly sales has $130,000 of cost dollars; bringing prime cost to 60% with constant cost dollars requires $130,000 divided by 0.60 equals $216,667 in monthly sales — a $16,667 monthly lift, or roughly 8%. An operator running 70% prime cost requires a 17% lift on the same logic.

The lift number is a screening output, not a prescription. In practice, operators above 60% prime cost rarely solve the problem through pure sales growth because the marketing and ramp investment required to lift sales 10% to 20% within a quarter typically exceeds the cash bandwidth of an at-risk operation. The realistic answer is a combination: a 5% to 10% cost reduction (labor schedule tightening, menu re-engineering, supplier renegotiation) paired with a 3% to 5% price increase and a steady same-store-sales focus over two to four quarters. The lift number sizes the gap; the operator's plan closes it.

The calculator does not report a required cost reduction because there are too many ways to cut cost (the operator chooses among labor, food, contract, and overhead levers) and the prescription depends on concept and context. The sales-lift figure is the single defensible derived diagnostic.

What this calculator does NOT model

Several material parts of restaurant operating economics fall outside the prime-cost calculation:

Occupancy cost. Rent, common-area maintenance, property tax pass-through, and utilities are below the prime-cost line. A shop with healthy prime cost but excessive occupancy (rent over 10% of sales is a common stress threshold) can still be unprofitable.

Credit-card processing fees. Typically 2.5% to 3.5% of card sales. These sit below the prime-cost line as operating expenses, not as COGS or labor.

Third-party delivery commissions. DoorDash, Uber Eats, and Grubhub commissions typically run 15% to 30% of delivery-channel revenue. The accounting convention is to record gross sales and the commission as a separate operating expense below the prime-cost line.

Marketing, repair and maintenance, insurance, professional fees. All operating expenses below the prime-cost line.

Service charges and tip pools. The calculator models employer-side labor cost. Tip pools are transfers between employees and do not flow through employer labor cost. Service charges are employer revenue paid out as additional wages — if the shop runs a service-charge model, the operator should enter sales inclusive of the charge and labor inclusive of the service-charge-funded wages.

FICA tip credit under IRC § 45B. A federal income-tax credit equal to the employer's share of FICA on tip income above the federal minimum wage. The credit reduces income-tax liability but does not change the labor-cost line on the P&L. Worth a conversation with a CPA for any shop with significant tipped-employee revenue.

State and local minimum-wage premiums. The calculator uses state-level minimum wages. Cities and counties with local minimum-wage premiums above the state floor (Seattle, Denver, Minneapolis, parts of California) should consult the local labor agency for the correct figure.

Concept-specific labor models. The calculator uses a single blended hourly wage and does not split tipped from non-tipped roles. Shops with heavy tipped-employee mix in a tip-credit state should compute the blended hourly cost as the cash wage paid plus employer payroll burden on the tipped portion and include it in the hourly wage input.

For any of the above — and for any consequential decision on lease commitments, capital structure, or partnership economics — consult a licensed CPA or restaurant-specific operating consultant. For state-specific minimum-wage and tip-credit questions, consult the state Department of Labor.

Sources

• 29 USC § 203(m) — FLSA tip credit statutory text.
• 29 USC § 206(a)(1) — federal minimum wage statutory text.
• 29 CFR § 531 — Department of Labor regulations on the tip credit, the cash-wage obligation, tip-pool restrictions, and the employee notice requirement.
• National Restaurant Association — annual Restaurant Industry Forecast and Restaurant Performance Index.
• US Department of Labor — Wage and Hour Division state-minimum-wage table.
• US Department of Labor — Wage and Hour Division tipped-employees reference.
• Cornell Legal Information Institute — statutory text of 29 USC § 203(m).
• IRS — Restaurant Industry Tax Center, including Form 8027 tip reporting and the FICA tip credit under IRC § 45B.

Last reviewed: 2026-05-16 against the National Restaurant Association industry benchmarks, 29 USC § 203(m), 29 USC § 206(a)(1), 29 CFR § 531, and the US Department of Labor state minimum-wage tables current as of 2026.