Savings & Banking
Emergency Fund Runway Calculator
An emergency fund buys time. Enter your savings and monthly expenses to see how many months you could cover if your income stopped — your runway. Add any partial income (severance, a side gig, unemployment) to see how much longer it lasts.
Lean-month spending: housing, food, utilities, insurance, minimum debts.
Partial income like unemployment, a side gig, or a partner's earnings.
Your runway
6 months
6 full months of essential expenses covered.
- Emergency savings
- $30,000
- Monthly burn rate
- $5,000
- 3–6 month target range
- $30,000
Expenses minus any income during the gap.
A common cushion is 3–6 months of expenses.
How this calculator works
Runway (months) = savings ÷ monthly burn rate, where burn rate is essential expenses minus any income during the gap. When income covers expenses, the burn rate is zero or negative and savings last indefinitely.
A simple division that assumes steady expenses and a constant partial income, and ignores interest earned on the savings (small over a few months). Use it to gauge your cushion, then aim for the 3–6 month range appropriate to your situation.
Try an example
Frequently asked questions
How long should my emergency fund last?
The common guideline is three to six months of essential expenses. Three months suits a stable dual-income household; six or more is safer for a single earner, variable income, or anyone whose job would be slow to replace. This calculator shows how many months your current savings actually cover.
What counts as essential expenses?
Your lean-month survival spending: housing, food, utilities, insurance, transportation, and minimum debt payments. In a real emergency you'd cut discretionary costs like dining out and subscriptions, so your true burn rate is lower than your normal spending — which makes your runway longer than you might expect.
How does partial income affect my runway?
It stretches it, sometimes dramatically. If unemployment, a side gig, or a partner's income covers part of your expenses, your savings only need to cover the shortfall — your 'burn rate.' If that income fully covers expenses, your savings aren't drawn down at all and your runway is effectively indefinite.
Where should I keep my emergency fund?
Somewhere safe and instantly accessible — a high-yield savings or money market account, FDIC-insured and earning a real rate. It shouldn't be invested in stocks, which could be down exactly when you need the cash, and it should be separate from your checking so it isn't spent by accident.
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Disclaimer: DayCents provides this calculator for educational purposes only. Results are estimates based on your inputs and the stated assumptions — they are not financial advice, a quote, or an offer of credit. Consult a qualified financial professional before making major money decisions.