To calculate the break-even point, divide your fixed costs by the contribution each sale makes, which is the selling price minus the variable cost per unit. With $10,000 of monthly fixed costs, a $25 price and $10 of variable cost, each unit contributes $15, so your break-even point is $10,000 ÷ $15 ≈ 666.67 units. Since you cannot sell two-thirds of a unit, round up: 667 units a month covers every cost, and the 668th unit is your first dollar of profit.
That is the same formula the U.S. Small Business Administration uses in its break-even guidance. Below we work it in units and in sales dollars, add a profit target, and show which levers move the number.
What is the break-even formula?
- Break-even units = Fixed costs ÷ (Price per unit − Variable cost per unit)
- Break-even sales ($) = Fixed costs ÷ Contribution margin ratio
- Contribution margin ratio = (Price − Variable cost) ÷ Price
Fixed costs are the bills that arrive whether you sell anything or not. Variable costs rise and fall with each sale.
Which costs are fixed and which are variable?
Sorting costs correctly matters more than the arithmetic. A typical split:
- Fixed: rent, insurance, salaried staff, loan payments, software subscriptions, equipment leases.
- Variable: materials, packaging, shipping per order, payment processing fees, sales commissions, hourly labor tied to production.
Some costs are mixed. An electricity bill has a fixed base charge plus usage that climbs with production. Split those into the two parts as best you can; a reasonable estimate beats ignoring them.
How do you calculate the break-even point in units?
Use the example from the opening and walk it step by step:
- Fixed costs per month: $10,000
- Price per unit: $25
- Variable cost per unit: $10
- Contribution per unit: $25 − $10 = $15
- Units needed: $10,000 ÷ $15 = 666.67, rounded up to 667
Check it. At 667 units, revenue is $16,675 and variable costs are $6,670. Contribution is $10,005, which just clears the $10,000 of fixed costs.
How do you calculate the break-even point in sales dollars?
Service businesses and shops with many products often prefer a dollar target. The contribution margin ratio here is $15 ÷ $25 = 0.60, meaning 60 cents of every sales dollar goes toward fixed costs. Break-even revenue is $10,000 ÷ 0.60 = $16,666.67 a month. Note that 667 units × $25 = $16,675, the small difference coming only from rounding up to a whole unit.
If you sell a mix of products, use a weighted average contribution margin ratio based on your typical sales mix. When the mix shifts toward low-margin items, the break-even point rises even if total sales stay flat.
How many units do you need to hit a profit goal?
Add the profit you want to the fixed costs. To earn $5,000 a month on top of covering costs:
- ($10,000 + $5,000) ÷ $15 = 1,000 units
- Revenue: 1,000 × $25 = $25,000
That figure is before income tax. If you want a specific after-tax profit, gross it up for your expected tax rate first.
How can you lower your break-even point?
There are only three levers, and each one shows up directly in the formula:
- Raise prices. At $27 instead of $25, contribution becomes $17 and the target drops to $10,000 ÷ $17 ≈ 588.24, or 589 units.
- Cut variable costs. Negotiating materials down to $9 gives a $16 contribution and 625 units.
- Cut fixed costs. Trimming fixed costs to $9,000 brings the target to 600 units at the original price.
Price changes have the largest effect per dollar because the whole increase flows to contribution. Test a new price in the profit margin calculator first so you know what it does to margin, and weigh any planned promotion with the discount calculator; a 10% discount on a $25 item takes contribution from $15 to $12.50 and raises the target to 800 units.
What are the limits of break-even analysis?
A break-even point is a planning tool, not a forecast. The model assumes a constant price, a constant variable cost per unit and fixed costs that do not change within the range you are studying. In real life, bulk discounts lower variable costs at higher volume, new hires raise fixed costs in steps, and demand depends on price. Treat the result as a minimum to plan around and revisit it whenever a major cost changes.
It also ignores timing. You might break even on paper in month six but run short of cash in month three because customers pay late or inventory has to be bought in advance. The SBA’s guidance on startup costs recommends planning for those early cash needs separately.
How does this connect to ROI and pricing?
The break-even figure tells you how much you must sell to stop losing money. Return on investment tells you whether the money you put into the business earns enough once you are past that line. Run both: the ROI calculator for the investment view and the break-even calculator for the volume target, and use the margin calculator to set prices that produce the contribution you need.
What is a worked example for a service business?
A solo bookkeeper has $3,200 of monthly fixed costs: software, insurance, a coworking desk and a draw for living expenses. Each client pays $400 a month, and the variable cost per client, mainly extra software seats and payment fees, is about $40. Contribution per client is $360, so the break-even point is $3,200 ÷ $360 ≈ 8.89, or 9 clients. Adding a $1,500 monthly profit goal gives ($3,200 + $1,500) ÷ $360 ≈ 13.06, so 14 clients. Seeing the target as a client count rather than a revenue figure makes it easier to plan marketing.
How often should you recalculate the break-even point?
Recalculate whenever rent, wages, supplier prices or your own prices change, and at least once a year when you set a budget. A quick monthly comparison of actual sales against the break-even point also works as an early warning: if you are only just clearing it, a slow month or a cost increase can push you into a loss.
Sources
- U.S. Small Business Administration: Break-even point
- U.S. Small Business Administration: Calculate your startup costs
FAQ
What does “How to Calculate Break-Even Point for a Small Business” explain?
To calculate the break-even point, divide your fixed costs by the contribution each sale makes, which is the selling price minus the variable cost per unit. With $10,000 of monthly fixed costs, a $25 price and $10 of va…
How should I use this guide with a calculator?
Read the definitions and assumptions first, then open the linked calculator with the same inputs. Treat results as estimates, not professional advice.
Is this financial or medical advice?
No. Calcenzo content is educational. Confirm important decisions with a qualified professional and official sources for your situation.