E-commerce Break-Even Calculator

Find out how many units you must sell — and at what revenue — to cover all costs. Works for Shopify, Amazon, TikTok Shop and more. All calculations run locally in your browser.

Selling Price Per Unit ($)

Variable Cost Per Unit ($)

Fixed Costs Per Month ($)

Results

Break-Even Units

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Break-Even Revenue ($)

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Break-Even Price ($)

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Contribution Margin Per Unit ($)

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Contribution Margin Ratio (%)

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Break-Even ROAS

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Break-Even MER

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Est. Months to Profitability

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Revenue Breakdown

Chart will render here (IDE)

Scenario Simulation

See how changes affect your break-even point (logic to be implemented by IDE):

Price Change (%)

Variable Cost Change (%)

Scenario results will be shown here.

What Is Break-Even for an E-commerce Store?

Break-even is the point where total revenue equals total costs — no profit, no loss. Below it you lose money; above it you profit. Every seller should know their break-even units and revenue before launching a product.

Fixed vs Variable Costs

Fixed costs (rent, salaries, software, base ad budget) stay constant. Variable costs (COGS, shipping, payment fees, commission) grow with each order. Break-even is driven by how much each sale contributes after variable costs.

Common Mistake: Classifying Ad Costs Wrong

Performance ads should be treated as variable customer-acquisition costs, not fixed costs. Treating them as fixed distorts your break-even calculation. Keep brand marketing separate from per-sale ad spend.

Break-Even ROAS & MER

Break-even ROAS is the minimum return on ad spend to cover costs; break-even MER (marketing efficiency ratio) is the minimum total revenue per dollar of marketing. Know both before scaling ads.

Frequently Asked Questions

What is the difference between break-even units and break-even revenue? ▾

Units is how many items you must sell; revenue is how much money those sales must generate. Revenue = units × selling price.

Is ad spend a fixed or variable cost? ▾

Performance ad spend is generally a variable cost per sale. Fixed marketing budgets (brand campaigns) are treated as fixed costs.

Does this work for Amazon sellers too? ▾

Yes — enter your Amazon per-unit variable costs (COGS, referral, FBA fee) and it works the same way.