SaaS Runway Calculator

Estimate when cash runs out across lean, base, and stress scenarios using current balance, MRR growth, gross margin, and operating burn.

When to use this tool

Bootstrapped SaaS planning where founder salary, growth, and burn trade off every month.
Board or advisor updates that need a transparent cash-out date under multiple scenarios.
Comparing hiring, tooling, and go-to-market decisions against runway risk before committing spend.

How it works

Enter current cash balance, MRR, monthly MRR growth, and gross margin assumptions.
Set fixed operating burn and optional variable cost ratio for a realistic net-burn baseline.
Review runway month, projected cash-out date, and burn multiple in base case.
Use lean/base/stress scenarios to quantify downside and choose a contingency plan.

Privacy: This tool runs entirely in your browser. Your input is not sent to our servers.

Forecast assumptions

Current cash balance (USD)Current MRR (USD)Net new MRR growth (%/month)Gross margin (%)Fixed operating burn (USD/month)Variable costs (% of MRR)Support, infra overage, and variable delivery costs.

Runway (base)

36+ months

Projected cash-out

Beyond 36 months

Current net burn/month

Burn multiple (annualized)

N/A

Lean / base / stress

Lean assumes improved growth efficiency and tighter burn control. Stress assumes slower growth and higher variable/fixed cost pressure.

Scenario	Runway	Cash-out timing
Lean	36+ months	Beyond month 36
Base	36+ months	Beyond month 36
Stress	9 months	Month 9

Model assumptions and decision framework are explained in Cash flow forecasting for bootstrapped SaaS.

For production delivery context, review Cooard case study and custom AI application services.

Frequently asked questions

Is this a GAAP financial model?

No. It is an operating forecast for planning decisions. Use your accounting system and finance advisor for reporting and compliance outputs.

Can I model slower collections or revenue shocks?

Yes. Reduce growth assumptions or increase burn in the stress scenario to simulate collection delays and demand volatility.

How often should a bootstrapped team update runway?

At least monthly, and weekly during major pricing, hiring, or churn changes. Runway assumptions drift quickly in early-stage SaaS.