01
Enter monthly fixed costs
Everything that is the same regardless of sales: rent, salaries, subscriptions. These must be covered before any profit exists.
Startup Break-Even Calculator
Break-even units and revenue, contribution margin, and pricing sensitivity.
Updated Reviewed by Sajid Hussain· Editor
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Last updated
June 2, 2026
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9 markets · 8 currencies
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How many sales before the business pays for itself?
Break-even analysis — units, revenue, contribution margin, and pricing sensitivity
A startup break-even calculator answers the most fundamental business question: how many units (or customers, or transactions) do you need to sell each month before the business covers its costs? Enter your fixed costs, selling price, and variable cost per unit, and this tool gives you the break-even point in both units and revenue — plus the contribution margin, current profit/loss, and how break-even changes if you raise or cut your price.
**Contribution margin is the engine of break-even analysis.** Every sale covers some variable costs (materials, payment processing, delivery) and the rest contributes toward fixed costs. The contribution margin is that remainder: price minus variable cost per unit. At $50 price and $20 variable cost, each sale contributes $30. Break-even is simply fixed costs ÷ contribution margin — if fixed costs are $10,000/month, you need $10,000 ÷ $30 = 334 sales to break even.
**The CM ratio connects units to revenue.** CM ratio = contribution margin ÷ price. At $30 CM and $50 price, the CM ratio is 60% — meaning 60 cents of every revenue dollar covers fixed costs and profit. Break-even revenue = fixed costs ÷ CM ratio = $10,000 ÷ 0.60 = $16,667. This is the "coverage ratio" financial models use to size the revenue needed at different price points.
**Margin of safety tells you how fragile the current position is.** Once you enter your current volume, the calculator shows the margin of safety: how far above break-even your current revenue is, as a percentage. A 20% margin of safety means revenue could fall 20% before you hit a loss — giving you a read on how much pricing power or volume cushion you have. A thin margin of safety (< 10%) is a risk flag.
**Pricing sensitivity reveals the leverage in your pricing decisions.** Small price changes have a large impact on break-even because they affect contribution margin directly. A 10% price cut on a 60% CM ratio product reduces CM from $30 to $25 — raising break-even by 33%. This tool computes break-even at ±10% and ±20% price so you can see the impact of a promotion or price increase before committing to it.
Quick facts
- Break-even point
- Both in units and revenue
- CM formula
- Price − variable cost — correctly split
- CM ratio
- % of revenue that covers fixed costs
- Pricing sensitivity
- Break-even at ±10%, ±20% price
- Margin of safety
- How far above break-even you are today
- Any currency
- Works globally — USD, GBP, EUR, INR, AUD
How it works
Three numbers to a full break-even picture
Three required inputs, one optional — under 30 seconds.
02
Enter price and variable cost
Selling price and direct variable cost per unit. Their difference is the contribution margin — what each sale contributes to covering fixed costs.
03
Read break-even point
Get break-even in units and revenue, plus the CM ratio and pricing sensitivity table instantly.
04
Add volume for profit/loss (optional)
Enter current monthly sales to see profit or loss, how far above/below break-even you are, and your margin of safety.
Steps to use the Startup Break-Even Calculator: Enter monthly fixed costs, Enter price and variable cost, Read break-even point, Add volume for profit/loss (optional).
Formula
The break-even formulas — standard managerial accounting
Textbook formulas with no approximations — the same as in a management accounting course.
01
Contribution margin
CM = Selling Price − Variable Cost per Unit
What each unit sold contributes to fixed costs and profit. Every sale first covers variable cost, then the remainder (CM) accumulates toward covering fixed costs.
Example: $50 price − $20 variable cost = $30 contribution margin per unit.
02
CM ratio
CM Ratio = Contribution Margin ÷ Selling Price × 100
What percentage of each revenue dollar contributes to fixed costs and profit. High CM ratio = high operating leverage — both for profit on the upside and loss on the downside.
Example: $30 CM ÷ $50 price = 60% CM ratio.
03
Break-even in units
Break-Even Units = Fixed Costs ÷ Contribution Margin
The number of units where total contribution margin exactly covers fixed costs and profit is zero.
Example: $10,000 ÷ $30 = 333 units per month.
04
Break-even in revenue
Break-Even Revenue = Fixed Costs ÷ CM Ratio
The monthly revenue at which fixed costs are exactly covered. Equivalent to break-even units × price.
Example: $10,000 ÷ 0.60 = $16,667 monthly revenue.
05
Margin of safety
Margin of Safety = (Revenue − Break-Even Revenue) ÷ Revenue × 100
How much revenue could fall before hitting a loss. A 20% margin of safety means a 20% revenue drop would bring the business to break-even, not into a loss.
Example: ($20,000 − $16,667) ÷ $20,000 = 16.7% margin of safety at 400 units.
Worked example
$10,000 fixed costs, $50 price, $20 variable cost
A clear SaaS or product business example — every formula step shown.
Scenario
A business has $10,000/month in fixed costs, sells at $50 with $20 in variable cost per unit, and currently sells 400 units/month. What is the break-even point and current position?
1
Step 1 · Contribution margin
CM = $50 − $20 = $30 per unit. 60% CM ratio — every $1 of revenue, $0.60 goes toward fixed costs and profit. $0.40 covers variable costs.
CM: $30 · CM Ratio: 60%
2
Step 2 · Break-even point
Break-even units = $10,000 ÷ $30 = 333 units. Break-even revenue = $10,000 ÷ 0.60 = $16,667/month. Below 333 units: a loss. Above 333: profitable.
Break-even: 333 units · $16,667/month
3
Step 3 · Current position
At 400 units: revenue = $20,000. Profit = ($30 × 400) − $10,000 = $12,000 − $10,000 = $2,000/month. Above break-even by 67 units.
Profit: $2,000/month
4
Step 4 · Margin of safety and pricing test
Margin of safety = ($20,000 − $16,667) ÷ $20,000 = 16.7%. At −10% price ($45): new CM = $25, new BE = 400 units — right at break-even. A 10% price cut wipes out all profit at current volume.
Margin of safety: 16.7% · Pricing risk: high
The takeaway
The $2,000 profit looks healthy, but a 10% price cut (a discount campaign) takes the business right back to break-even. High operating leverage cuts both ways: 60% CM ratio means a price increase of just $5 (10%) raises break-even from 333 to 250 units — a $4,167 revenue reduction that still maintains profitability at current volume.
Benchmarks
Contribution margin ratios by business type
CM ratio varies widely by business model. Higher CM ratio = more operating leverage — bigger profits at scale, but bigger losses below break-even.
| Metric | Poor | Average | Good | Excellent |
|---|---|---|---|---|
| Software / SaaS | < 60% | 60–75% | 75–85% | > 85% |
| Physical product retail | < 20% | 20–40% | 40–60% | > 60% |
| Services / consulting | < 30% | 30–50% | 50–70% | > 70% |
| Marketplace / platform | < 40% | 40–60% | 60–80% | > 80% |
| Margin of safety target | < 5% | 10–20% | 20–35% | > 35% |
Why this calculator
Calcrux vs other break-even calculators
Most free break-even tools give one number (units). This one adds CM ratio, current profit/loss, margin of safety, and pricing sensitivity.
| Feature | Calcrux | Typical free tool | Spreadsheet |
|---|---|---|---|
| Break-even in units and revenue | Units only | Manual | |
| CM ratio (% of revenue) | Manual | ||
| Current profit/loss at volume | Manual | ||
| Margin of safety % | Manual | ||
| Pricing sensitivity (±10%, ±20%) | Manual | ||
| Negative CM warning | |||
| Any currency | Usually USD |
Common mistakes
How break-even analysis goes wrong
Mixing fixed and variable costs
Why it matters
Break-even analysis requires clean separation of fixed and variable costs. Including semi-variable costs (e.g. sales commissions that have a fixed base and a % component) in the wrong bucket distorts the break-even point.
Fix
Separate each cost into truly fixed (unchanged with volume) or truly variable (changes directly with units). For semi-variable, split the fixed base into fixed costs and the variable component into variable cost per unit.
Ignoring payment processing in variable cost
Why it matters
For most digital businesses, Stripe or PayPal charges 2.9% + $0.30 per transaction. On a $50 product this is ~$1.75 — not zero. At 1,000 units/month that is $1,750 of variable cost mistakenly treated as zero.
Fix
Add payment processing fees to variable cost per unit. For a $50 product with 2.9% + $0.30 Stripe, variable cost includes $1.75 in processing.
Ignoring the impact of price cuts on break-even
Why it matters
A 10% price discount on a product with a 60% CM ratio raises break-even by 25% — far more than founders expect. Low-CM products amplify the break-even increase even more.
Fix
Use the pricing sensitivity outputs to model any discount campaign before running it. Check whether the required volume increase is realistic.
Using break-even as a target, not a floor
Why it matters
Break-even is the minimum — zero profit. Setting break-even as a sales target leaves no capital for growth, taxes, or debt service.
Fix
Add a desired profit to fixed costs and recompute. If you want $5K/month in profit, the "target revenue" = ($10K fixed + $5K profit) ÷ CM ratio.
Not updating break-even when fixed costs change
Why it matters
Every new hire, lease, or software subscription raises fixed costs and pushes break-even higher. Founders often discover this only after the number has already crept past current sales volume.
Fix
Re-run this calculator whenever you add a significant fixed cost. The new break-even and margin of safety show whether the change is affordable at current volume.
Tips
Use break-even to make better decisions
Add desired profit to fixed costs
Break-even is a floor. To find the volume for a profit target, add the profit to fixed costs: (Fixed + Target Profit) ÷ CM per unit = target units.
Price for contribution margin first
Before discounting, check how many extra units you need to maintain the same profit. Most discount campaigns require volume increases that never materialise.
Reduce fixed costs to lower risk
Cutting fixed costs lowers break-even and widens the margin of safety. Every fixed cost reduction directly reduces the revenue needed to break even.
Track margin of safety monthly
A shrinking margin of safety is an early warning of declining volume or increasing costs. Update this calculator monthly to catch trends before they become problems.
Model a worst-case volume
Use the pricing sensitivity table to run a worst-case: if sales drop 20%, are you still above break-even? If not, you need higher margin or lower fixed costs.
SaaS: use ARPA as price
For SaaS, price = ARPA, variable cost = direct COGS (hosting per customer, payment processing, support per user). This gives you the break-even in MRR or customer count.
Use cases
When founders use this calculator
The Startup Break-Even Calculator works across every stage of the workflow.
Setting a minimum viable price
Determine the lowest price that allows the business to break even, before adding any profit margin — the hard floor for pricing decisions.
Evaluating a discount campaign
Model the break-even at the promotional price and calculate whether the expected volume uplift actually covers fixed costs at the lower price.
Deciding whether to hire
Model the increase in break-even from adding a new salary to fixed costs, and determine how many additional units the hire must generate to justify their cost.
Planning a product launch
Before launch, set price and volume targets, then compute break-even to see what the first 90 days must deliver to reach profitability.
Stress-testing a business plan
Check whether the projected revenue in a business plan is above break-even under base-case, bear, and bull scenarios.
Comparing product lines
Compute CM ratio for different products to identify which product line contributes most to covering fixed costs — and where to focus growth efforts.
Glossary
Break-even vocabulary
Every important term you'll encounter in this calculator and the broader topic.
- Break-even point
- The sales volume (in units or revenue) at which total revenue exactly covers total costs — neither profit nor loss.
- Fixed costs
- Costs that do not change with sales volume: rent, salaried staff, software subscriptions. Must be covered regardless of how much you sell.
- Variable costs
- Costs that increase directly with sales volume: materials, payment processing, delivery. Zero if you sell nothing.
- Contribution margin (CM)
- Selling price minus variable cost per unit — the amount each sale contributes toward covering fixed costs and profit.
- CM ratio
- Contribution margin as a percentage of selling price. Measures how much of each revenue dollar is available to cover fixed costs and profit.
- Margin of safety
- The difference between current revenue and break-even revenue, expressed as a % of current revenue. Shows how much revenue could fall before losses begin.
- Operating leverage
- The sensitivity of profit to changes in revenue. High CM ratio = high operating leverage — bigger profit swings (up and down) for the same volume change.
Help & answers
Frequently asked questions
Everything you need to know about how the Startup Break-Even Calculator works.
01How do you calculate the break-even point for a startup?
Break-even units = Fixed Costs ÷ Contribution Margin (price − variable cost per unit). Break-even revenue = Fixed Costs ÷ CM Ratio. At $10K fixed costs, $50 price, $20 variable cost: BE = $10K ÷ $30 = 333 units, or $16,667 revenue.
02What is the contribution margin and why does it matter?
CM = price − variable cost per unit. It is what each sale contributes toward covering fixed costs and profit. A $30 CM on $50 price = 60% CM ratio. Break-even is always fixed costs ÷ CM — low CM means higher break-even.
03What is the margin of safety in break-even analysis?
Margin of safety = (current revenue − break-even revenue) ÷ current revenue. It shows how much revenue could fall before you hit a loss. A 20% margin of safety means a 20% revenue drop brings you to exactly break-even.
04How does a 10% price cut affect the break-even point?
More than you expect. On a 60% CM ratio product, a 10% price cut reduces CM from $30 to $25 — raising break-even by 33%. Low-margin products amplify this effect even more. Always check the pricing sensitivity before discounting.
05Should variable costs include payment processing fees?
Yes. Stripe charges ~2.9% + $0.30 per transaction. On a $50 product that is ~$1.75 per sale — not zero. Add payment processing, delivery, and any per-unit direct costs to variable cost for an accurate break-even.
06How do I model a profit target, not just break-even?
Add your desired monthly profit to fixed costs, then recompute. Target units = (Fixed Costs + Profit Target) ÷ CM per unit. If you want $5K profit on $10K fixed costs with $30 CM: target = $15K ÷ $30 = 500 units.
07Does this break-even calculator work in any currency?
Yes — fully global. Enter in USD, GBP, EUR, INR, AUD or any other currency. All results return in the same currency. The formulas are universal.
08Does this calculator account for taxes or sales commissions?
No — it computes pre-tax break-even and profit. For a net view, apply your local tax rate to the gross profit figure after the calculation. Sales commissions are best included as variable cost per unit if they are a % of each sale.
09What is the difference between break-even analysis and profit margin?
Break-even tells you the minimum volume to cover costs — the floor where profit is zero. Profit margin measures profit as a % of revenue at a given volume. Break-even answers "when do I stop losing?"; margin answers "how much do I earn above that?"
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Category
Startup & Business Intelligence
Subcategory
startup finance
Availability
Global · 9 markets
Price
Free forever
Topics
startup break-even calculatorbreak-even calculatorbreak-even analysiscontribution margin calculatorbreak-even point calculatorbreak-even unitsbreak-even revenuepricing sensitivity analysismargin of safety calculatorbusiness break-even calculator
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