Break-Even Point with Tax
Include income tax, sales tax & VAT to find the real profit point
Why Include Tax in Break-Even?
Real Profit
After-tax dollars are what owners keep. Ignoring tax overstates profit.
Cash-Flow Planning
Taxes are cash outflows. You must cover them to stay solvent.
Pricing Accuracy
Prices must be high enough to pay both costs and taxes.
Investor Clarity
VCs and lenders look at after-tax returns, not pre-tax.
After-Tax Break-Even Formulas
Income Tax (Corporation)
After-Tax BE Sales = Fixed Costs ÷ [1 − (Variable Cost Ratio + Tax Rate)]
Sales Tax / VAT
Tax-Inclusive Price = Pre-Tax Price × (1 + Tax Rate)
BE Units = (Fixed Costs + Tax) ÷ (Net Revenue per Unit)
BE Units = (Fixed Costs + Tax) ÷ (Net Revenue per Unit)
Combined Shortcut
BE Sales = Fixed Costs ÷ Gross Margin % × (1 + Tax Rate)
Step-by-Step After-Tax Break-Even
- Identify All Fixed Costs – salaries, rent, depreciation, etc.
- Add Estimated Tax – use corporate rate (e.g., 25 %) or blended rate.
- Adjust Contribution Margin – subtract variable costs and tax.
- Compute Break-Even Sales – divide total required cash by after-tax margin.
- Verify Cash Flow – ensure timing of tax payments is covered.
Tax-Inclusive Break-Even Examples
Software Company (25 % Tax)
Fixed Costs: $100,000
Gross Margin %: 60 %
After-Tax BE Sales = 100,000 ÷ 0.60 × 1.25 = $208,333
Restaurant (VAT 10 %)
Fixed Costs: $30,000
Pre-Tax Price per Meal: $20
Variable Cost: $8
Tax-Inclusive Price = 20 × 1.10 = $22
Contribution = 22 − 8 = $14
BE Meals = 30,000 ÷ 14 ≈ 2,143 meals
Contribution = 22 − 8 = $14
BE Meals = 30,000 ÷ 14 ≈ 2,143 meals
E-commerce (15 % Tax)
Fixed Costs: $50,000
Gross Margin %: 40 %
After-Tax BE Sales = 50,000 ÷ 0.40 × 1.15 = $143,750
After-Tax Break-Even Calculator
Pre-Tax Break-Even Sales: $—
After-Tax Break-Even Sales: $—
Extra Revenue Needed for Tax: $—
Download the Tax-Inclusive Workbook
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Dynamic tables for income tax, VAT, and sales tax scenarios
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