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Founders and operators

Are you actually profitable per customer?

LTV against CAC on a live model - see how churn quietly destroys lifetime value and flips unit economics red.

Your numbers

Starting numbers: A seed-stage subscription business selling to small teams on a yearly contract, losing a few customers a month. Change anything below.

Everything spent to acquire one paying customer - media, salaries, tools.

What one customer pays you in a typical month.

What share of that revenue is left after the cost of serving them.

Share of paying customers lost each month. This sets how long a customer lasts.

How long a customer commits for. Payback landing after this is payback you never see.

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Lifetime value vs cost to win

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Time to earn back the cost
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Gross profit per customer
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How it's computed

About this calculator

Unit economics asks one question: does a customer generate more gross profit over its lifetime than it cost to acquire? Lifetime value is monthly revenue times gross margin, stretched across the lifetime that churn allows. Divide that by CAC and you get the ratio investors quote. Payback tells you how long the cash is out the door, and the safety margin compares payback to contract length - if payback lands after the contract ends, you never actually get paid back. Pull the levers and watch churn do its quiet work: a small rise in monthly churn shortens lifetime, and lifetime value falls with it. The chain above shows every step of the calculation. When the numbers look like yours, save the model to stress-test pricing and retention scenarios, and share it with your team or investors.

Related calculators

Burn MultipleHow much cash you burn for every dollar of net new ARR - the efficiency number investors check first.Fully Loaded CACYour CAC once team, tools, agencies, and SDRs are loaded in - next to the paid-only number on the slide.Churn & Net MRRHow much churn drains each month, and how many new customers you need just to stay flat.CAC PaybackMonths of gross profit needed to repay fully loaded CAC, what a customer is worth, and whether the ratio clears the bar.RunwayMonths of cash left, the raise or cut needed for a clean year, and how deep the hole gets - with growth doing part of the work.Free Plan EconomicsWhether free-to-paid conversion covers the cost of serving the free base, and the conversion rate it would need to break even.Price Increase ImpactWhat the increase earns after the churn it causes, and how many customers you can afford to lose.Break-Even PointBreak-even in units, revenue, and months - once product mix and true fixed costs are in one place.Trial LengthWhether a longer trial's extra activation beats its extra support cost, and what the gap is worth every month.

Every number on this page is computed live by the LeverMap engine.