What is contribution margin?

Contribution margin is revenue per unit minus variable cost per unit. It is the amount each unit contributes to covering fixed costs. A SaaS charging $100/month with $10 in hosting and payment costs has a $90 contribution margin (90%). Higher contribution margins mean fewer units needed to break even.

How do I calculate break-even for a SaaS?

Divide your total monthly fixed costs by the contribution margin per customer. If fixed costs are $10,000/month and contribution margin is $90 per customer, break-even = 10,000 / 90 = 112 customers. At $100 MRR each, that is $11,200 MRR to break even.

What is a good gross margin for SaaS?

SaaS companies typically target 70–85% gross margin. Contribution margin below 60% suggests pricing is too low or variable costs (infrastructure, payment fees, support costs per customer) are too high. Infrastructure-heavy SaaS may have lower margins; software-only products often exceed 80%.

How does break-even differ from profitability?

Break-even means zero net profit — revenue equals costs. Profitability means revenue exceeds all costs (operating profit). A startup may be past break-even on revenue but still unprofitable at the company level if R&D or marketing spend exceeds the operating contribution. Break-even is a minimum threshold, not a goal.

What is safety margin?

Safety margin (also called margin of safety) is the buffer between current revenue and break-even revenue, expressed as a percentage. A 30% safety margin means revenue can drop 30% before the business hits break-even. Most investors look for 20%+ safety margin as a signal of resilience.

Is this calculator free?

Yes. The break-even calculator is completely free — no login, no email, no signup required. All calculations run locally in your browser. No financial data is sent to any server.

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Free Break-Even Calculator — Find Your Startup Profitability Point

Break-even analysis tells you exactly how many customers or units you need to cover all costs. This calculator uses your fixed costs (rent, salaries, subscriptions), variable costs per unit, and revenue per unit to calculate your break-even point, contribution margin, and how far you currently are from profitability.

Free — No SignupRuns in BrowserData Never Uploaded

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Calculate how many customers or units you need to cover all costs and reach profitability.

Break-even units — exact customer count needed to cover all costs
Break-even revenue — minimum monthly revenue for profitability
Contribution margin per unit and as a percentage
Distance to break-even — dollar gap from current revenue
Safety margin percentage — resilience buffer above break-even
Visual progress bar showing how close you are to break-even

Features

Everything you need in one Break-Even Calculator

Break-even units & revenue

Calculates the exact number of customers and monthly revenue needed to cover every fixed and variable cost — the minimum viable scale for your business.

Contribution margin analysis

Shows how much each customer contributes to covering fixed costs. Low contribution margin means pricing or variable costs need attention before you can scale profitably.

Distance to break-even

If you enter current revenue, the calculator shows exactly how far you are — in dollars and percentage — from the break-even threshold, and your current safety margin.

SaaS and product business ready

Works for subscription businesses (price per customer) and product businesses (revenue per unit). Enter any currency values — results are relative, not tied to USD.

How It Works

How to use Break-Even Calculator

Enter your fixed costs

Add monthly fixed costs: rent, salaries, software subscriptions, insurance — expenses that don't change with volume.

Set variable cost and revenue per unit

Variable cost is what it costs to serve one customer (hosting, payment fees, support). Revenue is your price per customer per month.

See your break-even point

Get break-even units, break-even revenue, contribution margin, and how far you are from profitability with current revenue.

Format Comparison

Fixed vs variable costs in SaaS

Cost Type	Examples	Break-even Impact
Fixed costs	Salaries, rent, SaaS tools, insurance	Set the floor — must be covered before any profit
Variable costs	Payment processing, hosting per user, support	Reduce contribution margin per customer
Semi-fixed (step costs)	New hire at 100 customers, CDN overage	Cause step-changes in break-even as you scale
Customer acquisition cost (CAC)	Ads, sales commission, onboarding	Separate from operating break-even — tracked via payback period

Troubleshooting

How to fix common syntax errors

Most “invalid JSON” failures come from a small set of mistakes. Paste the failing JSON above, click Validate, and the tool points you at the exact line and column.

Including CAC in variable costsvariable_cost = COGS + acquisition_cost

CAC is not a variable cost per unit of service — it is a one-time cost recovered over the customer lifetime. Include COGS (hosting, payment fees, support) in variable costs; track CAC separately via payback period.

Setting variable cost per unit to zero for softwareSaaS has no variable costs — all costs are fixed

Software has real variable costs: payment processing fees (2.9% Stripe), server costs per active user, customer success time, and third-party API calls per user. Ignoring them overstates margins.

Using gross revenue instead of net in contribution marginrevenue_per_unit = $100 (before payment fees)

Net revenue per unit deducts payment processor fees (typically 2.9% + $0.30 Stripe). A $100 plan nets ~$97. Small per-unit, but material at scale.

Confusing operating break-even with cash break-evenProfitable on paper but running out of cash

Operating break-even ignores capital expenditure, debt repayment, and timing differences. Cash break-even requires positive operating cash flow. Early-stage startups often hit operating break-even before cash break-even.

Treating break-even as a target instead of a floorGoal: reach break-even

Break-even is a minimum threshold — the business loses money below it and earns nothing at it. The real targets are the margin of safety (20%+ buffer above break-even) and the unit economics that sustain growth (LTV:CAC > 3:1).

Recalculating break-even without updating fixed costsBreak-even model from month 1 used at month 12

Fixed costs change as you hire, expand tooling, and rent more infrastructure. Recalculate break-even quarterly and every time a major fixed-cost item changes (new hire, office, major software upgrade).

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FAQ

Frequently asked questions

Break-even point is where total revenue equals total costs — the business makes neither profit nor loss. Below break-even you lose money on every period; above it you are profitable. For SaaS, it is the MRR that covers all fixed and variable costs for the period.

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References

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