Cash survival and operating break-evenOne-time plan cost is paid in month 1
Business
Cash Runway Break-Even Calculator
Connect operating break-even to liquidity survival. The calculator projects monthly revenue growth, contribution, fixed cash cost, one-time implementation spend, and recurring savings, then identifies the operating break-even month, minimum cash balance, runway exhaustion month, and funding gap required to reach break-even.
Operating break-even month-
Break-even monthly revenue-
Opening monthly burn-
Minimum projected cash-
Runway exhaustion month-
Funding gap to break-even-
24-month ending cash-
Plan viability-
Cash survival progress toward operating break-even
Survival-to-profit path
Test whether the cash balance reaches the break-even crossing
Closing cashMonthly operating cash
| Month | Revenue | Contribution | Fixed cash cost | One-time cost | Monthly cash | Closing cash |
|---|
Survival-to-profit setup
How to test whether cash lasts until operating break-even
- Enter unrestricted opening cash, excluding balances unavailable for operations.
- Use current monthly revenue and an achievable compound monthly growth rate.
- Enter contribution margin after revenue-linked cash costs.
- Separate recurring fixed cash cost from the one-time cost of the improvement plan.
- Set when recurring savings begin, then compare the break-even crossing with cash exhaustion.
Two clocks
Break-even timing and runway timing answer different questions
The operating clock ends when contribution equals recurring fixed cash cost. The liquidity clock ends when cumulative cash turns negative. A viable plan must survive the second clock long enough to reach the first, including the up-front cash paid to implement savings.
Detailed calculation process
Monthly revenue, burn, and cash-balance equations
Revenueₘ = Starting revenue × (1 + Monthly growth)^(m − 1)Contributionₘ = Revenueₘ × Contribution marginFixed costₘ = Base fixed cost − Savings when m ≥ start monthMonthly cashₘ = Contributionₘ − Fixed costₘ − One-time plan costₘClosing cashₘ = Closing cashₘ₋₁ + Monthly cashₘPost-plan break-even revenue = (Base fixed cost − Savings) ÷ Contribution marginDefault-case reconciliation
Why the first month often has the deepest burn
With the default inputs, the plan cost is paid immediately while recurring savings begin later. The schedule therefore distinguishes implementation burn from underlying operating burn and shows the minimum cash point rather than relying on opening cash divided by month-one burn.
Decision checkpoints
What management should test next
- Downside revenue growth and delayed sales conversion
- Contribution-margin erosion from discounts or mix
- Savings implementation delay and severance timing
- A minimum cash buffer above zero
Forecast boundary
Operating math is not a complete cash forecast
The model omits collection lag, working capital, tax, debt service, capital expenditure, financing proceeds, and irregular cash events. Use the cash-flow calculator when timing detail matters.
Cash runway break-even FAQ
Questions behind the crossing point
Can break-even occur after cash runs out?
Yes. That is precisely the funding gap this model exposes.
Why compound monthly growth?
Each month grows from the preceding month, matching a repeated monthly rate rather than a linear increment.
Is zero cash an acceptable target?
Usually not. Add a management buffer outside the model or treat the entered opening cash as net of the required reserve.
Practical examples
Cash Runway Break-Even Calculator in real planning situations
- Test whether a cost-reduction plan preserves enough cash to reach break-even.
- Compare revenue growth with the monthly burn curve.
- Calculate the extra funding needed when cash runs out before contribution covers fixed cost.
Important note
Before relying on this result
Calculated from the entered values using the displayed accounting method. Reconcile material decisions with source records and applicable accounting policy.
Additional Cash Runway Break-Even Calculator questions
Is accounting break-even the same as cash break-even?
No. This model uses cash contribution and fixed cash spending; depreciation and accrual timing are excluded.
Why include one-time implementation cost?
A savings plan can shorten recurring burn but consume cash before benefits begin.
What if revenue is already above break-even?
The model reports month 1 and still tests whether one-time spending creates a temporary cash deficit.
Does runway include financing proceeds?
Only if they are added to opening cash before running the model.