Break-Even Point Calculator

Break-even is the floor, not the target. The number tells you how many units you must sell to stop losing money — but it says nothing about how fast you accumulate profit beyond it. That speed is called operating leverage: if fixed costs are a large share of total costs, profit grows steeply once you cross Q*. A SaaS business with 85% gross margin scales dramatically; a low-margin retailer needs huge volume just to stay solvent. The contribution margin (p − VC) is the real lever: raise price, cut variable cost, or both. Fixed costs set the threshold, but contribution margin sets the slope.

Every business has two running totals: money coming in (price times units sold) and money going out (fixed cost plus variable cost times units). Break-even is simply the point where those two lines meet. Sell one unit fewer and you are in the red; one more and you are in the black. The formula Q* = fixed cost / (price − variable cost) just locates that crossing directly, so you can see your target before spending a cent.

Airlines rarely count units. Instead they track the break-even load factor: the share of seats that must be sold for a flight to cover its costs, typically around 70–80%. It reframes break-even not as a count of items but as a percentage of a fixed capacity — the same algebra, asked as "how full must we be?" A route with 65% break-even is a money machine; one at 95% is one bad week from disaster.