How to Calculate Your Breakeven Point

Breakeven is the point where revenue covers costs and the business stops losing money. It is the single most useful number a new business can calculate, and it is arithmetic rather than forecasting, which makes it more reliable than most planning.

The formula

Breakeven in units equals fixed costs divided by contribution margin per unit. Contribution margin per unit is your price minus the variable cost of delivering one unit.

Say your fixed costs are $3,000 a month. You sell at $150 and it costs you $45 to deliver each one. Your contribution margin is $105. Three thousand divided by 105 is 28.6, so you break even at 29 sales a month.

Fixed versus variable costs

Getting this split right is what makes the number meaningful.

Fixed costs arrive whether or not you sell anything. Rent, insurance, software subscriptions, accounting, your own salary if you take one.

Variable costs occur per sale. Materials, payment processing, delivery, per-unit labour.

The line is not always obvious. A phone contract is fixed. Commission is variable. Some costs are partly both, and the practical approach is to assign them to whichever they most resemble rather than agonising over precision.

What breakeven tells you

The number itself is less useful than the questions it lets you answer.

Is this realistic? If breakeven is 29 sales a month and your entire local market is 40 potential customers a year, the business does not work at that price and cost structure. Better to know now.

What happens if I raise prices? At $200 instead of $150, contribution margin rises to $155 and breakeven falls to 20 sales. A 33% price rise cut the required volume by nearly a third.

Where should I cut? Reducing fixed costs lowers breakeven proportionally. Cutting $500 from a $3,000 fixed base takes breakeven from 29 to 24 sales.

Our breakeven calculator works all of this out as you change the inputs, so you can see how sensitive the number is to each one.

Breakeven in dollars rather than units

For businesses without discrete units, service businesses especially, the same calculation works in revenue terms. Divide fixed costs by contribution margin expressed as a percentage.

With $3,000 in fixed costs and a 70% contribution margin, breakeven revenue is $4,286 a month.

The mistake that makes breakeven useless

Leaving your own pay out of fixed costs. If you do not include what you need to live on, the calculation shows the business breaking even while you personally are not paid. That is not breakeven in any sense that matters.

Put a realistic figure for your own income into fixed costs. The number will be higher and it will be true.

Breakeven and runway together

Breakeven tells you the volume you need. Runway tells you how long you have to get there. Both matter, and they interact.

If you break even at 29 sales a month and you are currently making eight, the question is how many months of runway you have while you close that gap. That is the calculation that determines whether a business survives its first year.

This is also why the risk in a new business is front-loaded. BLS cohort data shows the steepest drop happens in year one, from 100% of establishments to 79.6%, with the curve flattening considerably after that. The early period is when the gap between current sales and breakeven is widest.

When to recalculate

Any time a fixed cost changes, any time you change price, and any time your variable costs move. Breakeven is not a number you calculate once at the start. It is a number you keep current, because it is what tells you whether a decision helps or hurts.

A worked example, start to finish

Take a small design studio operating solo.

Fixed costs each month: software at $120, insurance at $65, accounting at $150, phone and internet at $85, and an owner draw of $3,500. Total fixed cost is $3,920.

The studio sells a standard project at $2,400, with variable costs of roughly $200 per project in contractor illustration and stock assets. Contribution margin per project is $2,200.

Breakeven is 3,920 divided by 2,200, which is 1.78, so two projects a month. That is a manageable number, and knowing it is manageable is what makes the business look viable rather than uncertain.

Now change one input. If the owner draw rises to $5,000, fixed costs become $5,420 and breakeven becomes 2.46, so three projects. One decision about personal income moved the required workload by 50%.

Breakeven with multiple products

Most businesses sell more than one thing, which complicates the calculation without changing the logic.

The usual approach is a weighted average contribution margin. Work out the margin on each product, weight each by its share of your sales mix, and use the resulting average in the formula.

The important consequence is that your breakeven moves when your sales mix moves, even if nothing else changes. Selling more of your low-margin line and less of your high-margin line raises the volume you need without anything looking obviously wrong.

Margin of safety

Once you know breakeven, the more useful derived number is how far above it you currently are.

If breakeven is 29 sales and you make 40, your margin of safety is 11 sales, or roughly 28%. That is the amount of decline the business can absorb before it starts losing money.

This is a better health measure than revenue on its own, because revenue tells you nothing about how close you are to the edge.

Breakeven for a decision, not just the business

The same arithmetic answers narrower questions, and this is where it gets genuinely useful day to day.

Considering a $400 monthly software subscription? At a $105 contribution margin, that decision requires four extra sales a month to pay for itself. That is a concrete question rather than a vague one.

Considering hiring? The fully loaded monthly cost divided by your contribution margin tells you how much additional volume the hire has to generate before it is neutral.

Framing every recurring commitment this way converts spending decisions into sales-volume questions, which are much easier to judge.

Common mistakes

Treating all costs as fixed. If everything sits in the fixed bucket, breakeven looks far worse than it is and the calculation loses its diagnostic value.

Ignoring payment processing. A percentage of every sale is a variable cost and belongs in contribution margin.

Using optimistic prices. Use what you actually charge after discounts, not your list price.

Calculating once. Breakeven is a live number. Recalculate whenever an input changes.

Where this fits with the rest of your numbers

Breakeven, runway and margin of safety are three views of the same underlying question: how long can this business survive, and what has to happen for it to stop needing to survive and start growing.

Our calculators cover breakeven, startup cost, hourly rate and product pricing together, and the glossary defines the terms plainly if any are unfamiliar.