The 1% rule says budget 1% of your home's value a year for maintenance. Where it came from, a worked cost table by home value, and when it's wrong.
Key takeaways
- The 1% rule means setting aside 1% of your home's current value per year for maintenance—a $400,000 home budgets about $4,000 a year.
- It's informal industry shorthand, not a peer-reviewed formula—Angi (formerly HomeAdvisor) and other real estate sources cite it as a starting range, not a guaranteed figure.
- Most sources actually give a range, 1% to 4%, and tie the higher end to older homes—Angi ties 1% to newer or recently renovated homes and 4% to older ones.
- The rule ignores climate, home age, deferred maintenance backlog, and lumpy big-ticket replacements (roof, HVAC, water heater)—all of which move the real number more than home value does.
- New-construction homes still under a builder or manufacturer warranty can reasonably budget below 1% for the first 1-3 years, since major-system failures are usually covered.
- Use the 1% figure as a floor for a young, well-maintained, moderate-climate home—not a ceiling, and not a substitute for pricing your actual roof, HVAC, and water heater age.
The 1% rule for home maintenance says to set aside about 1% of your home’s current market value every year to cover repairs and upkeep. On a $400,000 home, that’s roughly $4,000 a year, or about $333 a month. It’s a widely repeated shortcut in real estate and home-services content—including from Angi (formerly HomeAdvisor)—but it’s informal industry guidance, not an empirically validated formula, and it quietly assumes an “average” home that most houses aren’t. This page is the deep dive on that one rule: where it comes from, a worked table by home value, and the specific situations where it under- or overestimates what you’ll actually spend.
Where the 1% rule actually comes from
The 1% figure doesn’t trace back to a single named study. It shows up across realtor guidance, mortgage-lender advice pages, and home-services companies as a round, memorable number—easy for a first-time buyer to do in their head at closing. Angi’s home maintenance guidance states it more precisely as a 1% to 4% range, with the low end for a newer or recently renovated home and the high end for an older one. That range is the more honest version of the rule: a single flat 1% is really the optimistic end of a range that widens a lot with a home’s age and condition.
Separately, Angi’s own State of Home Spending Report tracks what homeowners actually spent, rather than what a rule of thumb says they should: average home maintenance spending (not counting larger improvement or emergency-repair categories) was $1,750 in 2024, down from $2,458 the year before. Those are national averages across homes of very different values and ages, so they don’t map cleanly onto any one home’s 1% figure—but they confirm the real number moves substantially year to year, which a flat percentage doesn’t capture.
Worked example: the 1% rule by home value
| Home value | 1% rule (annual) | 1% rule (monthly) | 4% high-end estimate (annual) |
|---|---|---|---|
| $200,000 | $2,000 | $167 | $8,000 |
| $300,000 | $3,000 | $250 | $12,000 |
| $400,000 | $4,000 | $333 | $16,000 |
| $434,100 (national median, NAR, July 2026) | $4,341 | $362 | $17,364 |
| $600,000 | $6,000 | $500 | $24,000 |
| $800,000 | $8,000 | $667 | $32,000 |
Two things to notice: the 1% column scales only with price, not with anything about the house itself, and the 4% column shows how wide the honest range really is—four times the number most people quote as “the” rule. A $400,000 home with a 22-year-old roof and original HVAC is not the same maintenance budget as a $400,000 home with both replaced three years ago, even though the 1% math gives them the identical answer.
When the 1% rule underestimates
| Situation | Why 1% falls short | What to do instead |
|---|---|---|
| Home older than ~20-25 years | Roof, HVAC, water heater, and plumbing are more likely to be original or near end of life—repairs cluster instead of spreading evenly | Lean toward the 3-4% end of Angi’s range, or price your specific systems’ remaining life |
| Harsh or variable climate (freeze-thaw winters, hurricane coastline, high UV/heat) | Weather-driven wear on roofing, siding, and exterior systems accelerates regardless of home value | Add a climate-specific line item—roof and exterior repainting cycles shorten in these zones |
| Deferred maintenance backlog | A home that skipped several years of upkeep doesn’t reset to “average”—the deferred work is still owed, often at a higher cost than if it had been done on schedule | Budget a one-time catch-up amount separate from the ongoing annual figure |
| Aging major systems nearing replacement (roof, HVAC, water heater) | These are lumpy five-figure costs the 1% average was never designed to smooth out in a single year | Check age against typical lifespans and start a dedicated sinking fund per system, not just the general 1% pool |
| High local labor and material costs | 1% of home value doesn’t adjust for regional labor rates, which can differ significantly by metro | Adjust upward using local contractor quotes, not the national average |
When the 1% rule overestimates
| Situation | Why 1% runs high | What to do instead |
|---|---|---|
| New construction, years 1-3 | Builder structural warranties and manufacturer warranties on major systems typically cover the failures that would otherwise be the biggest line items | Budget a smaller routine-upkeep amount (filters, landscaping, small fixes) and ramp up as coverage expires—see how home warranty coverage typically works for what’s included |
| Recently and fully renovated home | If the roof, HVAC, water heater, and major systems were all replaced together, the home behaves like new construction for several years regardless of its market value | Use a lower percentage until those systems age past their early, low-failure years |
| High-value home in a low-cost-of-living area | A home can carry a high market value from land or location while its actual structure and systems are modest and inexpensive to maintain | Budget from the home’s physical size and system condition, not purely its sale price |
How this fits the bigger budgeting picture
The 1% rule is one input, not the whole plan. It’s a fast floor to check your own maintenance spending against, especially useful when you don’t yet have years of your own repair history to draw on—new buyers, for example. Once you have two or three years of actual receipts, your own average is a better number than any national rule of thumb, including this one.
Related guides
Frequently asked questions
What is the 1% rule for home maintenance?
It’s a budgeting shortcut that says to set aside about 1% of your home’s current market value every year to cover maintenance and repairs. On a $400,000 home, that works out to roughly $4,000 a year, or about $333 a month, saved toward upkeep rather than spent all at once.
Where did the 1% rule come from?
It isn’t from a government agency or an academic study—it’s informal real estate and home-services industry guidance, commonly repeated by realtors, lenders, and companies like Angi (formerly HomeAdvisor). Treat it as a rough starting heuristic, not a validated formula for your specific house.
Is the 1% rule accurate for older homes?
Usually not on its own. Angi’s own guidance widens the range to 1% to 4% of home value and points toward the higher end for older homes, since aging roofs, HVAC systems, and plumbing fail more often and cost more to replace than in a newer or recently renovated house.
Should a new-construction home still budget 1% a year?
Not in the first few years. A new home under a builder’s structural warranty and manufacturer warranties on its major systems typically has lower real maintenance costs in years 1-3, since big-ticket failures are often covered. Budgeting a smaller amount and increasing it as those warranties expire is more realistic than budgeting a flat 1% from day one.
What should I use instead of the 1% rule if it doesn’t fit my house?
Combine it with the age and condition of your specific big-ticket systems: price out your roof, HVAC, and water heater’s remaining life, and add that estimated replacement cost, divided by its remaining years, on top of a baseline maintenance figure. The 1% rule works best as a floor to check your own number against, not the number itself.