Emergency fund calculator
The classic advice is “save 3–6 months of expenses,” but where you land in that range depends on how steady the income behind your bills is. This calculator starts at three months of essential expenses and adjusts for the things that genuinely change the math: variable income, a single-earner household, and dependents.
How to read the result
The output is a range, not a verdict. The lower number is a working floor; the upper number reflects the risk factors you selected. What actually matters is that the money is liquid - reachable in days without penalties - which is why most people keep it in savings rather than invested.
Where people usually keep it
A high-yield savings account is the standard home for an emergency fund: insured, liquid, and earning something while it waits. Building the fund itself is a pacing question: saving your first $1,000 covers realistic timelines, and how much to keep in an emergency fund covers sizing from zero. If you are juggling this against debt, see pay off debt or save first.
The formula this calculator uses
months = 3
+ 2 if income is variable or seasonal
+ 1 if the household has a single income
+ 1 if dependents rely on that income
months is capped at 6
lower target = essential monthly expenses * months
upper target = essential monthly expenses * min(months + 2, 8)
months to reach the lower target = lower target / amount saved each month
What it assumes without asking
- Essential expenses means housing, food, utilities, transport, insurance and minimum loan payments, not your whole budget
- The three-month starting point and the six-month ceiling come from the range the CFPB describes; the adjustments are this site’s, and they are arithmetic on your answers rather than a finding from anywhere
- No interest is counted, which understates the balance slightly
One example, computed in full: $2,000 of essential monthly expenses
| Situation | Months | Lower target | Upper target | Months to the lower target at $400 saved |
|---|---|---|---|---|
| Steady salary, two incomes, no dependents | 3 | $6,000 | $10,000 | 15 |
| Steady salary, one income, no dependents | 4 | $8,000 | $12,000 | 20 |
| Variable income, two incomes, no dependents | 5 | $10,000 | $14,000 | 25 |
| Variable income, one income, dependents | 6 | $12,000 | $16,000 | 30 |
What this calculator does not model
- Any specific risk you already know about, such as a car near the end of its life or a lease ending
- Access to credit, which changes how much cash you need on hand but not how much a job search costs
- That the target itself rises as your essential costs rise
The guide behind this tool
A number on its own does not tell you what to do with it. How much to keep in an emergency fund has the full grid of targets and timelines, and an emergency fund against a savings account covers why the two are not the same question.
Sources & further reading
This tool is general education, not personalized financial advice. It illustrates common rules of thumb - your situation may call for a different target. See our disclaimer.