Seafood And Oyster Bar Break Even: About $24K Monthly Sales

Fixed costs $19.7K/mo Overhead plus payroll

Contribution margin 81.5% After variable costs

Break-even revenue $24.2K/mo Monthly revenue target

Break-even timing Month 3 Model break-even point

Break-even calculator

Use this calculator to test monthly revenue, variable expenses, and fixed costs against break-even for a seafood and oyster bar.

Lean Base Full

Monthly revenue Sales add cash to cover fixed costs and profit. $ Slow month Peak month Variable expenses Food, packaging, fuel, and card fees rise with sales. $ Tight costs Heavy costs

Money available to cover fixed costs $44,110 $54,123 revenue - $10,013 variable expenses

Margin ratio

81%

Covers fixed costs

Yes

Fixed monthly costs Rent, wages, software, permits, and marketing hit each month. $ Lean overhead Higher overhead

Break-even chart Revenue Total costs

Which restaurant expenses are fixed, and which move with sales?

Cost classification

In the first year, listed variable items total 18.5% of sales, so contribution margin is 81.5%. Classifying payroll as semi-fixed and overhead as fixed keeps break-even tied to real capacity, not wishful average checks.

Expense	Cost	Break-Even Treatment	Common Mistake
Commissary Kitchen Rent ($1,200/month)	Fixed	Include in the monthly fixed hurdle from Month 1 through Month 60.	Spreading rent by cover and hiding the real monthly nut.
Vehicle Insurance ($450/month)	Fixed	Treat as fixed overhead because it does not rise with daily covers.	Linking insurance to sales volume when the bill stays flat.
Lead Chef salary	Semi-fixed	Model as payroll that steps up when full-time equivalent staffing rises in later years.	Holding chef labor flat while capacity and service volume grow.
Service Staff salaries	Semi-fixed	Increase in staffing steps as full-time equivalents rise from 1.5 in the first year to 3.5 in the mature year.	Using one labor percentage instead of planned headcount steps.
Food Ingredients	Variable	Deduct from sales as a variable item, starting at 10.0% in the first year.	Treating seafood purchasing like fixed overhead.
Paper Goods & Packaging	Variable	Apply as sales-linked expense, starting at 3.0% in the first year.	Budgeting one flat packaging amount despite order growth.
Fuel & Generator Costs	Variable	Deduct as a sales-linked operating item, starting at 3.0% in the first year.	Ignoring fuel usage when higher sales require more operating hours.
Credit Card Processing Fees	Variable	Apply to sales volume, starting at 2.5% in the first year.	Treating card fees like fixed software expense.

How does break-even change from lean to base to full volume for this seafood and oyster bar?

Scenario table

Break-even moves fast as volume and check size rise. In the lean case, fixed costs nearly swallow contribution; by the base and full cases, stronger covers and weekend checks create a wider cushion.

Planning assumptions only; actual results will shift with traffic, check size, and cost mix.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean opening-month run-rate	$242k	$44k	$197k	81.5%	$1k	Almost break-even; a small drop in covers turns it red.
Base Year 1 run-rate	$541k	$100k	$197k	81.5%	$244k	Clear cushion if Year 1 covers and weekend checks hold.
Full Year 2 run-rate	$924k	$162k	$224k	82.5%	$538k	Wide cushion, but only if weekly covers and weekend checks stay on pace.

What happens if weekday covers slip or seafood costs rise?

Stress test

Base case sits comfortably above break-even, but soft weekday covers and higher seafood, spoilage, or labor costs can narrow the cushion fast. A 10% sales drop or a 5-point variable-cost jump still leaves profit, just with less room.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$242k	$299k cushion	Base case clears break-even with room to spare.
Revenue shortfall	Monthly sales fall 10%.	$242k	$245k cushion	Soft weekday covers cut profit, but the plan stays above break-even.
Fixed-cost increase	Fixed rent and payroll rise 10%.	$266k	$275k cushion	Rent or labor creep eats cushion first.
Margin pressure	Variable costs rise 5 points from seafood cost or spoilage.	$258k	$283k cushion	Food waste and cost inflation hit margin faster than sales.
Combined pressure	Sales fall 10%, variable costs rise 5 points, and fixed costs rise 10%.	$283k	$204k cushion	Demand and cost pressure still leave profit, but the buffer thins.

What must a seafood and oyster bar founder verify before committing to the lease, buildout, and inventory buy?

Founder checklist

Don’t sign or spend until the covers, menu pricing, and cost controls hold in real orders. The model only works if Month 3 break-even stays intact without breaking the $205K payroll plan or the $789K cash floor.

1Demand proof550 covers/week

Check that weekday and weekend traffic can really reach 30, 40, 50, 60, 100, 150, and 120 covers.

2Menu AOV$18/$25

Keep midweek checks near $18 and weekends near $25, because the forecast needs those tickets to hold.

3Cost control18.5%

Lock sourcing, handling, and waste controls before buying seafood inventory so variable costs stay in line.

4Prep capacity150 covers

Make sure refrigeration, prep, and service can handle the Saturday peak without slowing tickets or freshness.

5Payroll load$205K

Hold Year 1 wages near the $205K plan, which is about $19.7K a month with fixed overhead.

6Cash cushion$789K

Stress-test the $231.5K capex and keep the cash floor intact, then watch weekly because Month 3 break-even is tight.