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What if CAC doubles?
Stress-test your runway against rising acquisition costs - see how fast the cash goes when each customer costs more to win.
Your numbers
Starting numbers: A seed-stage business winning forty customers a month, testing what happens if acquisition gets more expensive. Change anything below.
Everything spent to acquire one paying customer.
Paying customers won in a typical month.
Everything you spend in a month, acquisition included.
What one customer is worth to you across a year.
What is in the account today.
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Months of cash left
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How it's computed
About this calculator
Acquisition costs rarely stay put. Channels saturate, auctions heat up, and the price of winning a customer drifts upward - usually faster than revenue per customer does. This calculator ties CAC directly to runway: your burn plus total acquisition spend, minus the revenue your customers bring in, gives net burn, and your cash divided by net burn gives the months you have left. Doubling CAC while holding everything else steady shows how exposed your plan really is. Pull the levers to match your own numbers, then push CAC to where you fear it could go and watch the runway respond. The chain shows every step of the computation, so nothing is hidden. When it reflects your business, save the model to explore scenarios, set thresholds, and share it with your team or investors.
Every number on this page is computed live by the LeverMap engine.