Cash Runway Explained: How Many Months Could You Survive Without Income?
The One-Sentence Definition
Cash Runway is your liquid cash balance divided by your average monthly expenses. 6 months means you could pay all your bills for 6 months from cash alone.
Cash Runway is calculated automatically in Turbobulls. See your runway →
The Intuition: Months Until the Money Runs Out
Person A: 3,000 cash, 1,000/month expenses
Runway = 3 months. The classic minimum emergency fund. Enough to survive most short-term shocks, not enough for a long job search.Person B: 30,000 cash, 5,000/month expenses
Runway = 6 months. More dollars, same runway. Higher absolute spending pushes the absolute amount needed up, but the months-of-coverage figure normalises it.Runway is measured in months, not dollars, which is the whole point - it scales naturally with your lifestyle.
What the Mixed Badge Means
Inside Turbobulls, every metric carries a small scope badge that tells you what data feeds it. Cash Runway carries the Mixed badge.
That means it blends two scopes:
- Wallet balance - your cash balance across tracked cash accounts.
- Wallet expenses - your average monthly spending.
It ignores portfolio holdings (which can't be tapped instantly without selling) and broker cash (often subject to delays or transfer friction).
How to Read the Number
| Cash Runway | What it typically means |
|---|---|
| < 1 month | Critical. One bad week wipes you out. Top priority is building a buffer. |
| 1 - 3 months | Below minimum. Most experts recommend 3+. Vulnerable to surprise expenses. |
| 3 - 6 months | Healthy minimum. Covers most short-term shocks (illness, job loss, car). |
| 6 - 12 months | Strong. Comfortable for stable employment situations. |
| 12+ months | Cautious or pre-retiree territory. Justified for lumpy income or job uncertainty. |
See How Long Your Cash Would Really Last
How Much Runway Do You Actually Need?
The answer depends on three factors:
How Turbobulls Calculates Cash Runway
In plain words: Turbobulls divides your current cash balance by your average monthly expenses.
Cash Runway (months) = cashBalance / avgMonthlyExpenses
Find cash balance. Sum of all cash-type wallet accounts (excludes investments, excludes broker cash).
Find average monthly expenses. Total expenses across the period divided by total days, scaled to 30 days.
Divide. Cash balance divided by average monthly expenses.
When Cash Runway Matters - and When to Ignore It
- Early in your career. Before investments, cash is your only safety net.
- Income changes loom. Job changes, parental leave, starting a business.
- Lumpy income. Freelance or commission earners need longer runways.
- Before taking risk. Don't add risk in investments until cash runway is solid.
- You're under-tracking expenses. Inflated denominator masks real risk.
- Most wealth is in cash. Probably a sign of too much cash, not too little. See Cash allocation.
- Late career with strong investments. Less critical when other safety nets exist.
- Your "cash" is really brokerage cash. That counts toward Total broker cash, not wallet balance.
The Full Picture: Pair Cash Runway With These
Cash runway is your short-term safety net. Pair it with these for the full wallet picture:
Know Exactly How Long You Could Survive Without Income
Turbobulls computes your Cash Runway automatically from your cash balance and expense history. Spot dangerous drawdowns before they happen.
- Automatic Cash Runway in months
- Updates with every transaction logged
- Pairs with Income Stability for context-aware target setting
- Multi-currency cash handled natively
- Real-time visibility into your safety margin
- Zero manual calculations - no spreadsheets, no formulas
Read more
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