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100 guests at $12 food cost and a 32% target prices at $37.50 a head — $1,350 profit, and below 38 guests the fixed costs eat the event.
Catering pricing looks simple — cost the food, multiply, quote — until staffing ratios, rentals, travel, and the overhead of running a kitchen get priced honestly. This calculator builds the quote the way profitable caterers do: food cost per person divided by your food-cost target (28–35% is the band) sets the per-person price, then every event cost comes out — staff at real ratios, rentals, travel, and 10% overhead. On a 100-guest event at $12 food cost, the $37.50-per-person price clears $1,350. And the breakeven guest count explains the industry’s least-loved line: why every caterer quotes a minimum instead of discounting small parties.
Caterers use it before the proposal: 100 guests at $12 food cost and a 32% target prices at $37.50/head for $1,350 profit — and the breakeven math explains the event minimum.
Because fixed costs do not shrink with the guest list. Staff, rentals, travel, and prep exist whether 38 guests or 100 show up — at this calculator’s numbers the fixed wall is $825 per event, and each guest contributes $21.75 after food and overhead, so below 38 guests the event loses money at ANY viable per-person price. The minimum is not greed; it is the breakeven. The professional move is quoting it as a flat event minimum (“our events start at $1,500”) rather than a high per-person price for small parties — clients accept minimums far better than they accept $45 a head for a 20-person lunch. Small events you want anyway get priced as drop-off service, where labor collapses and the economics work at lower counts.
Read it as event margin before owner pay — and that distinction matters. If you cook and run the event, your wage lives inside the profit number: a $1,350 margin on a 100-guest wedding is usually a 12-hour day plus a day of prep, so the honest owner hourly is part of interpreting the margin. The numbers that keep the margin real: food cost must come from actual recipe costing per plate (the plate-cost calculator does this line by line — a “$12” that is really $14.50 flips this event to $1,100), staff ratios by service style (buffet 1:25, plated 1:10–12, passed apps add a body), and the 5–10% overage buffer cooked into food cost for the guarantee count. Service style moves the whole structure: drop-off carries 25% food cost, buffet is the standard, plated adds 30–50% over buffet, and stations price like plated with more theater.
The contract prices the count guarantee, not attendance: 50% deposit to book, final headcount due 7 days out, and the client pays for the guaranteed number whether or not every seat fills — your food and staff are already bought by then. Build the cancellation ladder into the contract too (90+ days full refund less admin, 30–90 days half, inside 30 days the deposit is earned), because a canceled date in wedding season is inventory that cannot be resold. The last margin leak is scope creep in planning: tastings, extra planning meetings, and menu revisions are labor — two tastings included, then a line item, is the standard that keeps “just one more change” from eating the event’s profit before the first plate is fired.