Use this as a planning check after buying, before renewing insurance, or when deciding whether your current cash reserve is enough. It is not a substitute for an inspection, policy review, or contractor quote.
Home and Cash Inputs
Include mortgage, tax, insurance, HOA, and PMI if applicable.
Use the largest realistic home, wind, hail, flood, or quake deductible.
Only count coverage you have verified and can use quickly.
Major systems age and optional replacement cost
Leave cost blank or zero to use a default allowance based on common replacement ranges.
Total target emergency fund
Priority:
Reserve Breakdown
| Component | Target | How it was estimated | Planning note |
|---|
Methodology Notes
The calculator builds a liquid-cash target from four buckets: annual repair reserve, insurance deductible reserve, housing payment reserve, and major systems reserve. The repair reserve uses a home-value rule of 1% for updated homes, 1.5% for average homes, 2.25% for high-risk homes, and 3% for severe-risk homes, then applies an age factor from 0.85 to 1.35.
Major systems use the entered cost or a default replacement allowance, then reserve a percentage based on estimated remaining life. This is intentionally conservative because emergency contractor pricing, deposits, temporary workarounds, code upgrades, and rush scheduling can cost more than planned replacement work.
The result should be adjusted for actual inspections, known defects, local labor prices, HOA documents, warranty exclusions, insurance coverage, deductible endorsements, and whether cash is truly liquid. Credit cards, HELOCs, and reimbursement checks can help, but they are not the same as cash already available.
Related Calculators
Frequently Asked Questions
What counts as a home emergency?
Examples include urgent roof leaks, failed HVAC in unsafe temperatures, water heater failure, electrical or plumbing problems, insurance deductibles after a covered loss, temporary housing gaps, and missed-income pressure on the monthly payment.
Should I keep this money separate from regular savings?
Separate tracking helps. The money should be liquid enough for deposits, deductibles, emergency contractor visits, and short reimbursement delays, even if it sits in the same high-yield account as other emergency savings.
Do warranties or HOA coverage reduce the target?
Only reduce the target for coverage that is documented, reliable, and quick enough for emergencies. Warranties have exclusions, service fees, claim limits, and contractor assignment rules. HOAs may cover exterior items but still pass special assessments to owners.
Why include months of housing payments?
Homeowners can face payment pressure from job loss, illness, temporary relocation, or a repair that creates overlapping costs. A payment reserve keeps a house problem from immediately becoming a mortgage or cash-flow problem.