The Three Numbers that Predict a Restaurant Bankruptcy 12 Months in Advance

1. What are the three numbers that predict bankruptcy?

A restaurant doesn't collapse overnight: it warns you twelve months in advance with three numbers almost nobody watches.

Prime cost above 65% of sales, a gap between theoretical and actual cost greater than 4 points, and fewer than 21 days of operating cash. When all three align, the capital drain has already begun. Some 60% of restaurants close before their third year, and almost none for lack of customers: they close because of operational variability never measured inside the cost structure. Diego F. Parra has audited the managerial accounting of more than 8,400 units across 43 countries and the pattern repeats: the owner watches sales, not unit economics. By the time he reacts, cash flow has already drained through a leak that plate costing would have caught with months to spare. Prime cost is the only indicator that adds ingredient cost and labor into a single controllable figure, and above 65% of sales the structure no longer leaves EBITDA to absorb a bad month.

2. Prime cost: the one figure that adds ingredients and labor

In a healthy restaurant that number lives between 58% and 62%: food cost of 28% to 32% plus kitchen and floor payroll of 28% to 33%. Every point above 65% is margin that vanishes before paying rent, utilities and debt. I've seen it in dozens of operations: the owner celebrates a record sales month without noticing prime cost climbed to 68% because he added three extra cooks to handle the volume. He sold more and earned less. Prime cost doesn't lie about that; the profit and loss statement at month's end, when there's nothing left to do, doesn't either. The gap between theoretical and actual cost is the most honest capital-leak detector there is: every point of difference between what the recipe says it should have cost and what the register actually paid is waste, theft or uncontrolled portioning. A healthy gap sits below 2 points.

3. Why is the theoretical vs actual gap the most honest leak detector?

Above 4 points, the restaurant is giving away money without knowing it. A cash example: an operation with $180,000 in monthly sales and 30% theoretical food cost should spend $54,000 on ingredients;

if the register paid $61,200, those 4 points are $7,200 a month gone. That's $86,400 a year, nearly the full profit of a small location. Plate costing measured against real inventory is the only tool that turns that invisible leak into a number you can correct on the very next purchase order. Days of operating cash translate everything above into pure survival, and below 21 days any variability —a supplier raising prices 8%, a slow rainy month— pushes the restaurant to fund operations with CapEx or expensive debt. You calculate it by dividing available cash by average daily operating spend. A restaurant with $42,000 in cash and $2,000 in daily spend has exactly 21 days: the line.

4. Days of operating cash: when 21 is the line of life

Below that, there's no cushion left to negotiate with suppliers or to survive a $6,000 equipment repair without reaching for a card at 45% annual interest. Diego F. Parra insists at Masterestaurant that this number separates the owner who decides from the owner who reacts: 30 days is breathing room, 21 is tension, under 14 is a restaurant already operating on borrowed money and still doesn't know it. The three numbers, read together, form a decision architecture: one measures profitability, another measures leakage, and the third measures survival time. Alone they mislead; combined they don't. A prime cost of 63% looks acceptable, but with a theoretical-to-actual gap of 5 points and 15 days of cash, that 63% is a snapshot already rotting. The right diagnosis reads the sequence: the leak inflates actual cost, actual cost pressures prime cost, and eroded prime cost burns cash month after month until 30 days become 12.

5. The three read together: a decision architecture

Twelve months of warning turned into a closure. The managerial accounting of the 8,400 audited units shows the same causal order over and over. The P&L doesn't manage; it only confirms, late, what these three numbers screamed on time. Start this week with one concrete action: calculate your three numbers using the last 30 days of data, not the last year. Prime cost comes from payroll plus food cost over sales; the gap, by comparing the theoretical costing of your 10 star dishes against actual inventory consumption; days of cash, by dividing your cash by daily spend. If prime cost passes 65%, freeze hiring and re-cost the menu before touching prices. If the gap exceeds 4 points, audit portions and purchases of your three most expensive ingredients: 70% of the leak lives there. If cash drops below 21 days, negotiate terms with suppliers today, not when you run short.

6. What to do this week with the three numbers

The Masterestaurant method doesn't ask for more sales; it asks you to measure these three numbers every Monday. That's the dashboard separating the restaurant that survives from the one that closes without ever seeing the blow coming. Prime cost is the only indicator that folds food and labor into one controllable figure: above 65% of sales, the cost structure no longer leaves EBITDA to absorb a bad month. The theoretical-vs-actual cost gap is the most honest capital-leakage detector: every point of difference between what the recipe says a plate should have cost and what the register actually paid is waste, theft, or unchecked portioning. Days of operating cash translate all of the above into survival: below 21 days, any operational variability —a supplier hike, a slow month— forces the restaurant to fund operations with CapEx or expensive debt. Read together, the three form a decision architecture: one measures profitability, one measures leakage, the third measures time. Bankruptcy happens when all three cross their threshold in the same quarter.