What is a break-even point?

The number of sales where your total profit equals everything you've spent. Before it, the shop is recovering its costs; after it, every sale is real profit.

How do I calculate break-even?

Divide your startup costs by your profit per sale and round up. For example, $300 startup costs and $15 profit per sale = 20 sales to break even.

What costs should I include?

Everything you spent to launch — equipment, design, software, samples, listing fees, packaging stock, and any upfront ad spend. If you also pay monthly costs, add them so you can plan for the extra sales each month.

Is break-even the same as profit?

No. Break-even is the point where you stop losing money. Profit starts on the next sale. A shop that hits break-even is healthy, but it's not yet a business that pays you.

How is this different from the KDP Break-Even Calculator?

This calculator works for any product or business. The KDP Break-Even Calculator is built specifically for Amazon KDP titles — it converts cover, design, and ad costs into the number of paperback or hardcover sales needed at your royalty per book.

Break-Even Calculator

Enter your startup costs and your profit per sale, and the calculator tells you how many sales you need to break even — the point where you've recovered what you put in. Add monthly recurring costs to see how many extra sales each month it takes to cover those too.

Last Updated: June 2026

Reviewed for current platform fees and pricing rules.

Startup / one-time costs ($)

Everything you spent to get going — equipment, design, software, listings.

Profit per sale ($)

Not sure? Use the Profit Margin Calculator first.

Monthly recurring costs ($)

Subscriptions, shop fees, or fixed ad spend. Optional.

Sales to break even

$300.00 in profit

Extra sales per month

No monthly costs entered

Profit per sale

$15.00

Break-even is when total profit equals total costs. Every sale after that adds real profit. For a more detailed KDP-specific version, see the KDP Break-Even Calculator.

Formula

Sales to break even = ⌈ Startup costs ÷ Profit per sale ⌉ · Extra sales per month = ⌈ Monthly costs ÷ Profit per sale ⌉

Worked example

$300 startup costs, $15 profit per sale, and $30 of monthly recurring costs.

Sales to break even = ⌈ $300 ÷ $15 ⌉ = 20 sales
Extra sales per month = ⌈ $30 ÷ $15 ⌉ = 2 sales
After 20 sales, every additional sale adds real profit — provided you also cover the monthly $30.

Answer: 20 sales to break even, plus 2 more each month to cover monthly costs.

How it works

Break-even is the first milestone in any new product or shop. Up to that point, every sale is replacing money you've already spent; past it, every sale is genuine profit. The math is intentionally simple: divide what you spent to start by what you actually keep per sale, and round up.

The number that matters here is profit per sale — what's left after fees, materials, shipping, and ads — not the sticker price. Raising your sale price by $1 doesn't usually move profit per sale by $1, because fees and costs scale with it. But a real $1 increase in profit per sale meaningfully shrinks the number of sales you need to break even, which is why margin work pays off so quickly.

Monthly costs are a separate trap. Subscriptions, shop fees, and fixed ad budgets keep running whether you sell or not, so you need a small number of sales every month just to stand still. The calculator shows those extra sales separately so you can pick a realistic monthly target.

Common mistakes

Using the sale price instead of profit per sale — that overstates how quickly you'll break even.
Ignoring monthly recurring costs and only counting one-time startup spend.
Forgetting that ads and refunds reduce profit per sale; build them in before you calculate.
Treating break-even as the goal — it's the milestone where you stop losing money, not where you start a sustainable business.
Comparing break-even sales between products with very different prices instead of comparing profit per sale.

FAQ

What is a break-even point?: The number of sales where your total profit equals everything you've spent. Before it, the shop is recovering its costs; after it, every sale is real profit.
How do I calculate break-even?: Divide your startup costs by your profit per sale and round up. For example, $300 startup costs and $15 profit per sale = 20 sales to break even.
What costs should I include?: Everything you spent to launch — equipment, design, software, samples, listing fees, packaging stock, and any upfront ad spend. If you also pay monthly costs, add them so you can plan for the extra sales each month.
Is break-even the same as profit?: No. Break-even is the point where you stop losing money. Profit starts on the next sale. A shop that hits break-even is healthy, but it's not yet a business that pays you.
How is this different from the KDP Break-Even Calculator?: This calculator works for any product or business. The KDP Break-Even Calculator is built specifically for Amazon KDP titles — it converts cover, design, and ad costs into the number of paperback or hardcover sales needed at your royalty per book.

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