How do you calculate the break-even point?

Divide fixed costs by the contribution margin per unit — selling price minus variable cost per unit. $5,000 of fixed costs on a $50 product with $30 of variable cost breaks even at 250 units. Multiply the units by price for break-even revenue.

What fixed costs should I include?

Everything that stays the same regardless of volume for the period: rent, insurance, salaried payroll, software subscriptions, loan payments. If a cost rises with each unit produced or sold, it belongs in variable cost instead.

What is contribution margin in break-even analysis?

The amount each sale contributes toward covering fixed costs: price minus variable cost. Once cumulative contribution equals fixed costs you are at break-even; after that, each unit’s full contribution becomes profit. The ratio form (contribution ÷ price) expresses the same thing per dollar of revenue.

What if variable cost is higher than selling price?

The calculator stops you, because every sale increases the loss — no volume can fix a negative contribution margin. The only moves are raising price, cutting unit cost, or dropping the product; selling more of it just burns cash faster.

How is target profit different from break-even?

Break-even targets zero profit; target profit adds the goal to fixed costs before dividing. Earning $2,000 on the same $5,000 of fixed costs and $20 of contribution means selling 350 units instead of 250 — exactly 100 more units, each contributing $20.

Can I use break-even analysis for services?

Yes — treat a billable hour, project, or retainer as the unit. Fixed costs are your overhead, and variable cost is the delivery cost per unit such as contractor pay or travel. The margin-of-safety line is especially useful for capacity planning, since hours are the scarce resource.

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The break-even idea

Every unit sold chips away at fixed costs by its contribution margin — selling price minus variable cost. Break-even is the volume where those chips add up to the whole fixed-cost bill: units = fixed costs ÷ (price − variable cost). Below it the business burns cash; above it, each additional unit drops its full contribution into profit.

Contribution margin is the real star

Price minus variable cost is the only money a sale actually contributes toward staying open, and the contribution margin ratio (contribution ÷ price) restates it per dollar of sales — handy when units are fuzzy, like agencies billing hours. A 40% ratio means $1 of revenue carries 40 cents toward fixed costs, so $5,000 of monthly overhead needs $12,500 of sales regardless of what the units are.

Margin of safety

Planned volume minus break-even volume is the margin of safety — how far sales could fall before the business slips underwater. Expressed as a percent of planned sales, it is a risk reading: 28% means demand can miss forecast by more than a quarter before losses start, while single digits mean the plan has no room for a bad month.

Worked example

A product sells for $50 and costs $30 per unit to deliver; fixed costs run $5,000 a month.
Contribution margin = 50 − 30 = $20 per unit (40% of price).
Break-even = 5,000 ÷ 20 = 250 units, or $12,500 of revenue.
Planning 350 units leaves a margin of safety of 100 units (28.6%) and $2,000 of profit.

How to use it

Total your fixed costs for the period you are planning.
Enter price per unit and the variable cost that scales with each unit.
Read break-even units and revenue; add a target profit to size a sales goal.
Check the margin of safety to see how much forecast error the plan survives.