How to Price a Dish at a Target Food Cost: Cajun Salmon $8.90 Example

Step 1 — verify the $8.90 is the full plate cost

The formula is only as honest as its numerator. A salmon plate cost must include the portioned fillet at yield (a 6oz portion from fish bought whole costs more per ounce than the fillet price suggests once trim and shrinkage are counted), the Cajun seasoning blend by weight, oil or butter for the sear, every side and sauce on the plate, and the garnish. Operators who cost the protein and estimate the rest typically understate plate cost by $0.80 to $1.50 — which moves a 30% target to 33–35% silently.

Cost each component from current supplier invoices, not from memory: salmon prices move weekly, and a $8.90 built on last quarter’s fish price is fiction. Include a waste factor for the protein (2–5% for portioned fillets handled well) and confirm side portions with a scale check during one service. The recipe-costing discipline behind this step is detailed at https://restaurantmargin.com/blog/theoretical-vs-actual-food-cost — the period-level method that keeps plate costs honest over time.

Finally, decide the costing standard for the whole menu before pricing any single dish: which ingredients count, how waste factors are set, and how often costs refresh. One dish priced on full costing next to another priced on protein-only guessing produces a menu that looks engineered and is not.

Step 2 — apply the formula and round deliberately

Menu price = $8.90 ÷ 0.30 = $29.67 theoretical. Menus do not carry cents-level theoretical prices, so round into the architecture: $29.99 preserves a sub-$30 perception and lands at 29.7% food cost; $30.00 is cleaner on upscale menus and lands at 29.7% as well ($8.90 ÷ $30 = 29.67%). Both roundings hold the target — the difference is positioning, not math.

Generalize with a rounding table for any $8–$10 protein cost at 30%: $8.00 → $26.67 → price $27 (29.6%); $8.50 → $28.33 → price $28.99 or $28 (30.4%/30.3%); $9.00 → $30.00 exact; $9.50 → $31.67 → price $32 (29.7%); $10.00 → $33.33 → price $33.99 or $33 (29.4%/30.3%). Notice the pattern: rounding moves the result by fractions of a point, which is noise — but only if the $8.90-class numerator was complete in Step 1.

Resist charm-pricing superstition as strategy. Whether $29.99 outsells $30.00 depends on your guests, segment, and channel; test it if you care, but never let the third decimal distract from the first-decimal work of complete costing and contribution checks.

Step 3 — check contribution dollars, not just the percentage

A 30% food cost on a $30 dish contributes $21.10 toward labor, overhead, and profit. A 25% food cost on a $12 side contributes $9.00. Percentages rank efficiency; dollars pay rent. Every priced dish must pass both gates: percentage within target band AND contribution per cover consistent with its role (stars earn, workhorses carry volume, puzzles get fixed, dogs get removed — the matrix method at https://restaurantmargin.com/blog/restaurant-menu-engineering-matrix-example).

For the Cajun salmon at $30 with $8.90 cost, $21.10 contribution is strong for a casual-dining entrée. But compare it with the dish it displaces: if guests switch from a $26 chicken dish contributing $18.50, the net gain is $2.60 per switch — worth promoting. If they switch from a $34 steak contributing $22.00, the salmon promotion costs $0.90 per switch and should not be pushed as the hero.

Set a house minimum contribution per entrée cover (for example, $14–$18 depending on segment) and flag anything below it regardless of percentage. A 22% food-cost appetizer contributing $6 does not rescue a menu; it decorates one.

Step 4 — guard prime cost and the rest of the P&L

Food cost percentage is one third of the story. A salmon priced perfectly at 30% still loses money if the labor to fire it during a short-staffed rush requires overtime, or if delivery packaging and commissions take another 25% on off-premise orders. Check the dish against prime cost (food plus labor as a share of sales) using the weekly method at https://restaurantmargin.com/blog/prime-cost-formula-restaurant, and against delivery economics at https://restaurantmargin.com/blog/restaurant-delivery-commission-profit-margin before featuring it on marketplace listings.

Watch the three classic traps. First, sale-price drift: a $30 salmon discounted to $24 for happy hour runs at 37% food cost during the promotion — budget the promo as a marketing line, not as a costing surprise. Second, protein inflation: re-cost monthly, because a $1 move in salmon cost shifts the percentage a full point at this price. Third, portion creep: line staff upsizing a 6oz portion to 7oz adds roughly 17% to protein cost and erases the pricing work in a week.

When the numbers stop working — supplier spike, competitive ceiling, labor step-change — the decision framework at https://restaurantmargin.com/blog/should-i-raise-the-price-or-reduce-the-portion-size-of-a-low-contribution-restaurant-dish structures the raise-vs-resize choice without guessing.

Limitations and assumptions

The $8.90 figure is a teaching example, not market data: your salmon cost depends on species, cut, yield, supplier, and week. Percentages in this guide are arithmetic consequences of the example, not targets prescribed for your restaurant — set targets from your P&L, segment, and local costs. Menu psychology claims are presented as testable hypotheses for your guests, not universal laws. Recalculate with current invoices, validate portions on the line, and review prices on a schedule rather than once; plan options at https://restaurantmargin.com/pricing systematize the costing cadence behind this guide.