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Home Maintenance Budget & Reserve Calculator

Turn home value, age, and major systems into an annual maintenance reserve and a monthly sinking-fund schedule.

$
28 years

Annual reserve

$7,400

1.7% of value · $625/month sinking fund
Monthly transfer schedule
MonthTransfer
Month 1$625
Month 2$625
Month 3$625
Month 4$625
Month 5$625
Month 6$625
Month 7$625
Month 8$625
Month 9$625
Month 10$625
Month 11$625
Month 12$625

What this assumes

  • Base reserve uses 1.5% of home value annually, adjusted for age and systems.
  • Reserve is for maintenance and predictable replacements — not remodel wish lists.
  • Does not replace insurance deductibles or catastrophe reserves.

Understanding the result

A reserve is cash flow insurance

Spreading reserve monthly avoids financing a water heater or HVAC replacement on a credit card at 18% APR.

How the math works

Annual reserve = home value × adjusted rate. Age, pool, large lot, and aging systems bump the rate above 1.5% baseline. Monthly schedule spreads the same annual total across twelve transfers.

Where to find each input

  • County assessor or recent appraisal for value
  • Home inspection report for system ages
  • HOA docs for exterior coverage

Worked examples

$400,000 home, 20 years old

1.5% ≈ $6,000/yr, $500/mo.

Covers filters, service calls, and minor repairs — not roof replacement lump sum.

$550,000, 55 years, old HVAC flag

Rate ~2.25% ≈ $12,375/yr.

Pair with appliance tracker for HVAC replacement runway.

Pool added

+0.4% on value for pool maintenance increment.

Schedule pump service and reserve for resurfacing decadally.

What this does not include

  • Insurance deductibles
  • Remodel capital projects
  • Utility bills

Regional adjustment

Harsh climates and coastal corrosion warrant upper end of age adjustments.

Accuracy and references

1–2% rule per FHA lender guidance and BLS homeowner maintenance expenditure surveys.

Counterpart bridge

Pricing this on the contractor side?

This page interprets quotes and budgets from the buyer’s chair. The matching pro tool uses the same scope logic to build a defensible price.

Open Cash Runway Calculator

Common questions

What is the 1% rule for maintenance?
Budget about 1% of home value per year for upkeep; older homes often need 2% or more.
How does home age change the reserve?
Homes over 30 years add roughly 0.25–0.5% of value for aging roof, MEP, and envelope items.
Should I include HOA fees?
HOA covers some exterior maintenance — lower your self-managed reserve for townhomes if HOA is substantial.
Is this the same as an emergency fund?
Related but separate — keep 3–6 months of expenses liquid in addition to this reserve.
What about a pool?
Pools add predictable chemical, equipment, and resurfacing costs — toggle adds a flat annual increment.
How do I use the monthly schedule?
Auto-transfer to a dedicated savings account on the first of each month.
Does reserve include lawn care?
Only if you treat landscaping as maintenance; many owners budget it separately.
When should reserve spike?
Before roof, HVAC, or water heater end of life — cross-check appliance lifespan tracker.
1% or 2% rule?
Start at 1.5% here; older homes trend to 2%+.
Separate emergency fund?
Yes — keep 3–6 months expenses liquid besides this reserve.
HOA townhome?
Lower exterior reserve if HOA covers roof and siding.
Include lawn?
Large lot flag adds increment; otherwise budget landscaping separately.
When to spike savings?
Before known roof or HVAC end of life.
Tax deductible?
Maintenance is not capital improvement — consult CPA for capital vs repair.
Rental property?
Same math; landlord reserves differ by lease terms.
Track actual spend?
Compare bank outflows yearly — adjust rate if consistently over.
Warranty plans?
Subtract predictable service if warranty covers — avoid double-counting.
Link to ownership cost tool?
Use together — ownership cost shows PITI plus reserve.

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