Twelve dollars. That is the lowest price a widget maker with $10,000 in monthly fixed costs and $2 in variable cost per widget can charge, at 1,000 units a month, without losing money. At $11.99 the month loses money. At $12.01 it makes money. Here is how to calculate break-even price including fixed costs, and the formula behind that twelve dollars:
Break-even price = (total fixed costs / expected units) + variable cost per unit
$10,000 / 1,000 units = $10 of fixed cost per unit. Add the $2 variable cost. Twelve dollars. The formula looks almost too simple, which is why people mistrust it, but the arithmetic is doing exactly one job: spreading everything you must pay regardless of volume across the units you expect to sell, then adding what each unit costs you directly.
How to calculate break-even price with fixed costs: the bakery version
The widget example is abstract. Here is the same formula on a small bakery selling cakes. Monthly fixed costs: $1,000 for rent, equipment, and utilities. Variable cost per cake: $30 in ingredients and labor. The owner expects to sell 100 cakes a month.
- Fixed cost per cake: $1,000 / 100 = $10
- Variable cost per cake: $30
- Break-even price: $40
At $40 a cake, 100 cakes exactly cover the month. Notice what the formula punishes: if she sells only 80 cakes, the fixed cost per cake jumps to $12.50 and break-even rises to $42.50. Volume is doing quiet work inside this formula. Every unit you fail to sell makes the remaining units more expensive to justify.
The three versions of the formula
The price version above solves for the minimum price at a planned volume. Two siblings solve for the other unknowns, and all three use the same building block: contribution margin, which is price minus variable cost per unit. That is the amount each sale contributes toward fixed costs, and it is the same concept behind our contribution margin guide.
Break-even in units = fixed costs / (price - variable cost). The bakery charging $50 a cake: $1,000 / ($50 - $30) = 50 cakes a month to break even. Below 50, the month loses money.
Break-even in revenue = fixed costs / contribution margin ratio. The bakery's margin ratio is $20 / $50 = 40%. $1,000 / 0.40 = $2,500 in monthly sales. Same answer as 50 cakes, expressed in dollars for the owner who thinks in revenue.
Units for a target profit = (fixed costs + target profit) / (price - variable cost). Want $2,000 profit at $50 a cake? ($1,000 + $2,000) / $20 = 150 cakes. The formula extends naturally: profit is just another fixed amount the sales have to cover.
Where the formula breaks
Three assumptions deserve suspicion. First, the volume. The formula takes your expected units as a given, but price changes demand: the $12 widget price assumes you still sell 1,000 units at $12, and cheaper is not always more. Break-even math and demand curves live in different spreadsheets, and this is only one of them.
Second, "fixed" costs that are not really fixed. Rent is fixed until you outgrow the space. Salaried payroll is fixed until volume forces a hire. These step costs stay flat across a range and then jump, which means the formula is accurate inside the range and wrong the month you cross it. If your volume is near a step, run the formula twice: once with current fixed costs, once with the stepped-up number.
Third, the single-product fiction. Most businesses sell a mix, and the formula wants one variable cost and one price. For a product mix, blend the contribution margins by sales mix and treat the business as selling one average unit. It is approximate, but so is every plan, and an approximate floor beats the common alternative, which is pricing by feel and discovering the floor from below.
Remember the contribution margin from the three versions above? That is where this connects back to margin thinking. Break-even is the price at zero margin. Your target margin lives above it: if you want a 40% margin on the $40 break-even cake, the price is not $40 plus 40%, it is $40 / (1 - 0.40) = $66.67, because margin is measured on price, not cost. Our target-margin pricing guide walks through that conversion, and the overhead markup guide covers the older markup-side approach to the same problem.
Examples use simplified numbers to show the method. One pricing idea a week: subscribe to the newsletter.