Food Trucks: COGS Tracking, Permit Costs, and the Margin Math Behind Mobile Food
Food trucks fail for the same reason restaurants fail — not because the food is bad, but because the operator never knew their real food cost, labor cost, or which locations and events were actually making money. The margin math in mobile food is brutally thin and completely unforgiving of sloppy bookkeeping.
The difference between a food truck that survives and one that doesn't is almost always prime cost discipline: knowing exactly what you spent on food and labor as a percentage of revenue, broken down by location and event. Most operators have no idea.
The bookkeeping issues that hurt food truck operators:
- Prime cost is not tracked: Prime cost — food cost plus direct labor cost, expressed as a percentage of revenue — is the single most important metric in food service. The target varies by concept, but anything above 65% is a warning sign. Trucks that don't calculate prime cost by location and event are flying blind on the metric that determines whether the business is viable.
- Location-by-location profitability is invisible: A private corporate catering event at $4,000 in revenue looks great. But if it required 12 hours of prep and service labor, a long drive, event fees, and a special menu, the margin may be worse than a regular $900 lunch spot. Without isolating revenue and direct costs per location and event type, operators optimize for top-line revenue instead of bottom-line margin.
- Permit and commissary costs are excluded from the business model: Health department permits, commissary kitchen rental, parking permit fees, event booth fees, and city vending licenses are real operating costs that most truck operators undercount. When these costs are buried in miscellaneous expense rather than allocated against revenue, food cost and labor cost look better than they are.
- COGS tracking breaks when the menu changes: The gap between theoretical food cost (what the recipe should cost) and actual food cost (what was spent on ingredients) is called variance. In a restaurant, variance catches spoilage, theft, and portioning errors. Food trucks that change their menu frequently lose the ability to calculate theoretical cost — and with it, any ability to know whether food cost is in control.
- Three revenue channels have different economics: Street service, catering, and special events each have different labor models, different food costs, different pricing power, and different customer acquisition costs. When all three are reported as a single revenue line, the business cannot evaluate which channel deserves more investment and which is draining margin.
- The truck as capital asset is not managed: A commercial food truck is a $70,000 to $150,000 asset that depreciates, requires maintenance, and will eventually need replacement. Operators who do not depreciate the vehicle, do not build a maintenance reserve, and do not model replacement capital are carrying a time-limited asset on their balance sheet as if it lasts forever. The surprise comes when a compressor or generator fails and the cash is not there.
- Cash payment reconciliation is inconsistent: Food trucks that run high cash volume and inconsistent POS discipline create a gap between reported revenue and actual revenue. The gap is not always intentional — it is often just poor end-of-shift reconciliation. But it produces COGS percentages that cannot be trusted and a tax exposure that grows over time.
What it costs: a business that generates revenue but never builds cash, locations and events that drain margin without the operator knowing it, a capital asset that fails without warning, and financials that cannot support financing for a second truck.
We help food truck operators build the cost accounting and location-level P&L reporting that separates sustainable mobile food businesses from ones that grind to a stop.