CASH-RESILIENCE PLANNER

Emergency fund calculator

Go beyond one rule of thumb. Put essential spending, income-recovery time, uncovered one-off risks, and current cash into one scenario.

CASH BUFFERStart from essential spending and real exposures

QUICK SCENARIOS

Essential monthly expensesUSDIncome runwaymonthsLargest realistic one-off exposureUSDInsurance or dedicated coverageUSDCurrent accessible emergency savingsUSDMonthly amount you can addUSDAnnual cash-yield assumption%Desired build timelinemonths

All values are calculated only in this browser and are not uploaded or saved. The yield is a planning assumption, not a live account rate.

PLANNING TARGET$20,500

6 months of essentials ($18,000) plus $2,500 of uncovered one-off exposure.

CURRENT GAP$15,500

EXPENSE COVERAGE1.7 mo

FUNDED24%

NEXT ACTION$630 / month

Approximate monthly saving required to close the gap within 24 months.

At the current contribution, the model reaches the target in about 31 months.

RUNWAY COMPARISONThree, six, and nine months are scenarios—not rules

3 MONTHS$11,500$6,500 gap

6 MONTHS$20,500$15,500 gap

9 MONTHS$29,500$24,500 gap

Formula and calculation boundary

Planning target = essential monthly expenses × runway months + the part of one realistic one-off exposure not covered by insurance or a dedicated fund. The savings timeline compounds current cash at the entered annual yield and adds the monthly saving at each month-end.

Worked example

With the English default $3,000 essential spending, six months of runway, a $2,500 uncovered exposure, and $5,000 already saved, the target is $20,500. At $500 per month and 1.5% annual yield, the model reaches it in about 31 months; reaching it in 24 months requires about $630 per month.

Check before acting

Build essential spending from recent transactions, including irregular necessities divided by twelve.
Choose runway from income replacement time, dependents, job concentration, insurance, and fixed-cost flexibility—not from a universal rule.
Keep the core reserve accessible and separate predictable expenses into sinking funds so they do not consume emergency capacity.

Questions people ask

Is three to six months always the right amount?

No. It is a starting range. Stable diversified income may justify less runway, while variable income, one earner, dependents, or a long job search can justify more.

Should the emergency fund include every possible disaster?

No. Use a few realistic exposures, subtract reliable insurance or dedicated funds, and add the largest remaining gap rather than stacking every catastrophe.

Should I count investments as current emergency savings?

Only assets that are sufficiently stable and accessible for the emergency plan belong in the core number. Volatile or locked investments can fail that test at the wrong time.

Use the full emergency-fund sizing framework ↗

How to use the result

Treat the result as a range to review, not a precise amount that must appear immediately. A starter buffer can first reduce reliance on expensive debt, then grow toward one month of expenses and the full target. Prioritize safety, liquidity, and locally applicable account protection over return for the core reserve.

Continue with: How much emergency fund do you need?, then use the net worth calculator to place accessible cash beside liabilities.

References

This is general education, not personalized financial, investment, or tax advice.