Cash discipline

Cash runway is a timing problem, not a headline problem.

Use it when you need to know how long the business can keep operating after you factor in burn, revenue, and the reserve you want to keep untouched.

Review burn rateReview MRRCheck paybackCheck churn

Worked example

A runway figure only matters if you know the burn behind it.

If you have $300,000 in cash and are burning $50,000 per month after revenue, the business has about six months of runway. If revenue covers another $15,000 of cost, the runway extends, but only while the revenue stays dependable.

Add a reserve target before you decide the business can safely hire, launch, or delay fundraising.

Interpretation

How to read runway like an operator

  • Use runway to decide whether the company has enough time to change the cost base.
  • Use burn rate to separate one-off volatility from the underlying monthly spending level.
  • Use MRR and churn to test whether growth is actually helping the cash profile.
  • If the reserve target is tight, cut or delay fixed spend before the runway becomes a deadline.

Runway check

Cash Runway Calculator

See how long your cash lasts after you account for real monthly burn. Use it before hiring, scaling inventory, or committing to fixed spend that is hard to unwind.

Check burn rateReview MRR
Editorial desk scene with a laptop showing a runway chart, cash flow papers, and planning materials
Cash runway

A runway view that makes the timing problem obvious

The artwork pairs the chart with a planning desk so the page reads like a real decision, not a generic finance template.

Net monthly burn

$26,000

Runway

3.8 months

Approx. days

115 days

Cash after reserve

$98,000

Interpretation

If monthly revenue is lower than operating cost, runway is just cash divided by the net burn. If revenue is covering the burn, the calculator will show a positive cash flow state instead of a countdown.

Keep a reserve buffer if you need time for collections, refunds, payroll cycles, or a slower-than-expected sales month.

How cash runway Works

Cash runway compares the cash you have today with the amount you lose each month after revenue is offset against operating costs. The result gives you a planning window, not a guarantee, so reserve the time you need for delayed receipts, refunds, payroll, and other timing gaps.

Formula

Net burn = Monthly operating costs - Monthly revenue | Runway months = Cash on hand / Net burn

Key Features

  • ✓Shows runway from cash on hand and real monthly burn
  • ✓Makes it obvious when revenue is covering the burn
  • ✓Keeps a reserve buffer separate from headline cash
  • ✓Pairs naturally with burn rate and MRR checks

Pro Tip

A runway target of six months is a common rough rule for small teams, but the right buffer depends on revenue stability, payroll timing, and how hard the spend is to reverse.

Reference links

SBA finance and cash flowBDC cash flow managementStripe billing docs

Related tools

Continue your workflow with the next useful tool.

These links stay within the same decision path so you can move to the next calculation without starting over.

Burn Rate CalculatorMeasure monthly burn from actual cash movement and operating costs.Monthly Recurring Revenue CalculatorCheck whether recurring revenue is strong enough to support the burn.Payback Period CalculatorSee how quickly acquisition cost comes back in cash terms.

How these links are chosen

We only link to closely related pages so each next step supports the same decision.

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