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Breakeven is 12 cups a day — the cart survives almost any spot, but the ceiling is foot traffic, and only catering breaks through it.
The coffee cart is the lowest-risk entry in food service: an $850/month fixed floor means breakeven at 12 cups a day, and 120 cups a day at $4.75 nets $8,179 a month before your wage. The trade is the ceiling — a stationary cart's volume caps where the foot traffic caps, and there is no second register to open. This calculator runs the cup math, shows your breakeven, and prices the catering lever that breaks through the ceiling.
Cart owners use it before signing a pitch: breakeven is 12 cups/day against an $850 fixed floor — survivable anywhere, but only catering breaks the foot-traffic ceiling.
A well-placed cart doing 120 cups/day at $4.75 averages nets around $8,000/mo before the owner's wage — the example margin of 65% looks rich because labor is you. The range by location is brutal: an office-lobby anchor or hospital entrance does 100–160 cups/day; a random street corner does 30. So the business is a location business wearing an apron — the same cart, the same espresso, 4× the revenue at the right door. Growth levers since volume caps: catering bookings (office events, weddings, teacher-appreciation days at $300–600 flat — one booking equals 2–3 spot-days), pastry attach (resold at 2× cost, attaching at 30–40% of orders on the same transaction), and eventually a second cart with an employee, which is when the model stops being a job and starts being a business. Startup: $8–20k for a quality used cart build versus $30–60k new — and don't cheap out on the espresso machine, it IS the product.
The stack varies by state and city but the shape is consistent: a health department license (mobile food facility or temporary food service — with a commissary agreement in most states, since carts lack full kitchens), a business license, seller's permit for sales tax, and venue-specific permission — the office-lobby deal needs the building's sign-off, not the city's vending permit, and farmers markets have their own vendor applications with waitlists. The commissary question matters: most health departments require cart food prep and water/wastewater handling through a licensed commissary kitchen ($200–500/mo), though self-contained carts with proper tanks and water heaters can qualify standalone in some jurisdictions — the spec of your cart determines which world you live in, so design for your state's code BEFORE buying. Fire and propane inspections apply to carts with gas equipment. Budget: $500–1,500 first-year permits plus commissary. The operator advantage: this stack is a weekend of paperwork versus a café's months — the cart's regulatory weight is as light as its fixed costs.
Different risk profiles wearing the same apron. The cart: $8–20k entry, $850/mo fixed floor, 12-cup breakeven, total mobility (a dead spot costs a morning, not a lease) — but a hard volume ceiling at 120–160 cups/day and no seating revenue, no food program, no community-anchored brand value. The shop: $80–250k buildout, $6–12k/mo fixed (rent, labor, utilities), breakeven at 200–300 cups-equivalent/day — but seating multiplies ticket size, the food program doubles margins, and a beloved café builds a brand worth selling. The proven sequence: cart first — prove the menu, the workflow, and the neighborhood demand at 10% of the risk; the cart's cup counts by daypart are the business plan for the shop; some of the best cafés in every city started as the cart in their own future lobby. Seasonality runs on the drink mix: hot-drink winters out-sell iced summers in most climates (the opposite of ice cream), and catering carries the event season. Where carts genuinely beat shops forever: campuses, hospitals, and corporate parks where a café lease is impossible but a lobby cart deal is a phone call.