Startup Break-Even Calculator

The break-even point is when your startup generates more revenue than it incurs in costs — the moment you become profitable. More precisely: monthly profit (revenue minus fixed costs minus variable costs minus customer acquisition costs) turns positive for the first time. For SaaS startups, break-even typically occurs at 12–24 months; for more capital-intensive models, it can take significantly longer.

Burn rate is the amount your startup loses per month. There are two variants: Gross Burn Rate = all monthly expenses (salaries + rent + tools + marketing + other fixed costs). Net Burn Rate = Gross Burn minus incoming revenue. Net burn rate is the more relevant metric because it shows how much capital you actually consume per month. Runway = Starting Capital / Net Burn Rate = months until money runs out.

The rule of thumb is: an LTV:CAC ratio of at least 3:1 is the target for a healthy SaaS business. This means each customer generates at least three times their acquisition cost over their lifetime. A ratio below 1:1 means you spend more acquiring customers than they bring in — a clear warning sign. Above 5:1 suggests you are underinvesting in growth and could scale faster.

It depends heavily on the business model, burn rate, and growth. Bootstrapped SaaS startups with low costs can become profitable within 6–12 months. VC-funded startups often prioritize growth over profitability and deliberately take 3–5 years. E-commerce startups with high variable costs (COGS 40–60%) typically need higher revenue volumes for break-even. Our calculator shows you exactly when your model reaches break-even.

Unit economics describe the profitability of your business model at the level of a single unit — typically per customer or per transaction. Key metrics include: Contribution Margin = revenue per unit minus variable costs. Customer Lifetime Value (LTV) = total revenue per customer over their entire usage period. Customer Acquisition Cost (CAC) = total marketing and sales costs divided by new customers acquired. Positive unit economics mean: each additional customer brings in more than they cost.

The rule of thumb: at least 12–18 months of runway after each funding round. Less than 6 months of runway is alarm level — you need to immediately cut costs or raise funding. Fundraising itself typically takes 3–6 months, so start your next round when you still have 9–12 months of runway. Bootstrapped startups should have enough capital for at least 12 months without revenue, or an alternative income stream (e.g., freelancing alongside the startup).

Customer churn is the percentage of customers who leave or cancel their subscription in a given period. A monthly churn rate of 5% sounds harmless, but means: over 12 months you lose 46% of your customers (1 - 0.95^12). At 10% monthly churn, it is 72%. Every lost customer must be replaced by a new one before you can even grow. That is why churn reduction is often more important than more marketing — you cannot solve a product-market fit problem with more advertising.

LTV is calculated differently depending on the business model: For SaaS/subscription: LTV = Average revenue per customer per month (after variable costs) divided by monthly churn rate. Example: €50 margin/month at 5% churn = LTV of €1,000. For one-time purchase (e-commerce): LTV = Average order value × purchase frequency × average customer duration. For marketplace/commission: LTV = Average commission per transaction × transaction frequency / churn rate.

Founding costs depend heavily on the legal form: UG (limited liability): From approx. €500–1,000 (notary, trade register, business registration). GmbH: Approx. €2,500–5,000 (€25,000 share capital required, at least €12,500 to be paid in at founding, plus notary and registration). GbR/Freelancer: Nearly free (just business registration or tax office registration). Add ongoing costs: tax advisor (€200–500/month), hosting/tools (€100–500/month), business address, insurance, and potentially domain and trademark registration.

The ideal timing for fundraising depends on your situation: Pre-Seed (idea + team): When you have a strong team and identified a clear market need, but need capital for the MVP. Typical: €50,000–500,000. Seed (first traction): When you have a working product, first paying customers, and positive signals for product-market fit. Typical: €500,000–2M. Series A (scaling): When you have proven your model works and need capital to grow faster. Typical: €2–10M. Bootstrapping is a valid alternative if your business model generates cash flow quickly.