Emergency fund calculator
Turn your own reserve duration and essential spending into a transparent target—then compare it with current savings and a planned monthly contribution.
This is your chosen arithmetic target, not a judgment that the amount is adequate or safe. Interest, inflation, tax, insurance, debt priorities and unexpected events are not modeled.
Included
- A reserve duration chosen by you
- Essential monthly spending and an extra one-off buffer
- Current emergency savings and funding gap
- Whole months to target at a fixed monthly contribution
Not included
- A recommended or adequate reserve duration
- Interest, inflation, tax or account type
- Income stability, insurance, debt priority or prediction of emergencies
What this means
The target is your essential monthly spending multiplied by the reserve duration you choose, plus any extra one-off buffer.
The calculator does not decide how many months are right. CFPB guidance notes that the amount depends on your situation, so the duration remains an explicit input rather than a recommendation.
Formula & worked example
target = essential monthly spending × reserve months + extra buffer gap = max(0, target − current savings) months to target = round up(gap ÷ monthly contribution)
$2,000 essential spending, 4 months, $1,000 buffer and $4,000 saved
- Target
- $9,000
- Gap
- $5,000
At $500 per month, the arithmetic gap closes in 10 whole months.
How this calculation works
The calculation follows the formulas, definitions and assumptions explained on this page. The references below support the method and any stated boundaries.
Official sources
- Consumer Financial Protection Bureau — emergency fund guide — Emergency savings needs depend on the person's situation; the calculator therefore leaves the target duration to the user