What is the true cost of homeownership?

The true cost of homeownership is the total monthly outlay required to actually own a home — not just the mortgage payment. The HomeScore True Cost Index breaks it into eight layers: principal & interest, property taxes, homeowners insurance, PMI when applicable, utilities, a maintenance reserve, a repair-risk reserve, and a major-system replacement reserve.

Why is the mortgage payment only half the story?

For a median US single-family home in 2026, the principal & interest payment is roughly 52% of the true monthly cost. The other 48% is taxes, insurance, utilities, and the three reserve layers — the costs lenders don't underwrite to but homeowners absolutely pay.

How much should I budget for home maintenance?

Plan for 1% to 3% of the home's value per year. Use 1% as the floor for newer homes in good condition, 2% for typical 20-to-40-year-old homes, and 3% for older homes with deferred maintenance. The True Cost Index treats this as the maintenance reserve layer.

What is a repair-risk reserve and why do I need one?

Maintenance covers planned upkeep — gutter cleaning, HVAC tune-ups, sealants. A repair-risk reserve covers the unplanned: a slab leak, a tripped breaker that won't reset, a sewer line root intrusion. Most homeowners hit at least one five-figure surprise per decade, which is why HomeScore models them separately.

What is a major-system replacement reserve?

A sinking fund for the five expensive systems with finite lifespans: roof, HVAC, water heater, electrical panel, and sewer line. You divide the typical 2026 replacement cost by the remaining months of useful life and save that amount monthly. Done right, no replacement is ever an emergency.

How is the True Cost Index different from PITI?

PITI (principal, interest, taxes, insurance) is the lender's view — built to qualify you for a loan. The True Cost Index is the owner's view — built to make sure the loan you qualified for actually fits the life you have to live in the house. It adds utilities, maintenance, repair-risk, and replacement reserves.

How much do utilities really cost?

For a median US single-family home, plan on $250–$400/month combined electricity, gas, water, sewer, and trash. Climate, age of the home, square footage, and HVAC efficiency move the number significantly. Pre-1980 homes typically run 20–40% higher than 2010s builds of the same size.

Does property tax change after I buy?

Yes. Many counties reassess at sale price, which can mean a step-up the year after closing. Some states (California, Florida) cap annual reassessment growth; most do not. Budget based on the home's likely reassessed value, not the seller's prior tax bill.

When does PMI go away?

On a conventional loan, PMI typically drops automatically at 78% loan-to-value and can be requested at 80%. FHA mortgage insurance often runs for the life of the loan unless you refinance. Budget for PMI/MIP until you can confirm in writing it's removed.

How much does homeowners insurance cost in 2026?

The national average runs roughly 0.45%–0.65% of home value per year, but coastal, wildfire, and severe-storm markets are running materially higher in 2026. Florida, Louisiana, and parts of California can run 2–4× the national rate.

What's the difference between routine maintenance and a repair?

Maintenance is planned, recurring work that extends a system's useful life: filter changes, gutter cleaning, sealant refreshes. A repair restores a system that's failed or degraded. Maintenance reduces the size of the repair-risk reserve you need — it doesn't replace it.

How do I figure out the replacement timeline for my systems?

Start with the typical lifespan: roof 20–30 yrs, HVAC 15–20, water heater 8–12, electrical panel 25–40, sewer line 50–100. Subtract the system's current age. If less than 5 years remain, the replacement reserve for that system should be funded aggressively.

Should I include closing costs in true cost?

No — closing costs are a one-time expense at purchase, not a recurring cost of ownership. The True Cost Index focuses on what the home costs to own each month. Closing costs belong in your cash-to-close planning instead.

Is the True Cost Index the same as 'cost of ownership' or 'total cost of homeownership'?

The terms are related but not identical. 'Total cost of homeownership' usually means a lifetime number. The HomeScore True Cost Index is specifically the monthly, layer-by-layer breakdown — designed so you can act on it (cut a layer, fund a reserve) rather than just look at it.

Does HOA fit into the True Cost Index?

Yes — when present, HOA dues sit alongside the eight standard layers. For condos and planned communities, HOA can rival the property tax line. Always confirm reserve-study results before buying; a poorly funded HOA can trigger special assessments that blow up the True Cost.

What's the right emergency fund for a homeowner?

Three to six months of full True Cost (not just the mortgage payment), held separately from the replacement reserve. The replacement reserve handles planned end-of-life events; the emergency fund handles things you didn't see coming — a job loss, a medical event, a flood not covered by insurance.

How often should I re-run the True Cost Index?

At least once a year, and after any of: a property reassessment, an insurance renewal, a rate refinance, a major repair, or a system reaching the end of its useful life. The numbers move; the framework doesn't.

Can I just buy a home warranty instead of funding a replacement reserve?

A home warranty can soften specific failures but it doesn't replace a reserve. Most warranties cap payouts per event and exclude major scope items (full roof, sewer line, panel upgrade). Treat a warranty as a small co-insurer, not a substitute for the replacement reserve.

How does the True Cost Index help with affordability?

A 28% housing-to-income ratio against PITI alone often hides a 35%+ ratio against the True Cost. Running the Index before you buy tells you whether the home fits the life — not just whether the bank will fund it.

Is this financial advice?

No. The HomeScore True Cost Index is a planning framework, not financial, tax, or insurance advice. Always confirm specific tax rates, insurance premiums, and lender requirements with the relevant professional.

The HomeScore Framework

The True Cost of Homeownership: an 8-layer framework for 2026

Most mortgage calculators end at principal & interest. That number is usually around half of what a home actually costs to own each month. The HomeScore True Cost Index™ names the other half — explicitly — so you can plan for it instead of being surprised by it.

Reviewed January 2026 by HomeScore Research.

If you only plan for the mortgage payment, you're planning for about half the real bill. Read this once, then pressure-test any home you're considering against all eight True Cost layers — before you write an offer.

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Proprietary framework

HomeScore True Cost Index™

Eight layers that make up the real monthly cost of owning a home. Reviewed January 2026 by HomeScore Research.

1.Principal & Interest
52%
Mortgage payment at the prevailing 30-year fixed rate.
Source: Freddie Mac Primary Mortgage Market Survey
2.Property Taxes
13%
State and local property tax assessed on home value.
Source: US Census Bureau ACS — Median Real Estate Taxes
3.Homeowners Insurance
6%
Hazard insurance premium; rising with climate exposure.
Source: NAIC Homeowners Insurance Report
4.PMI / MIP
3%
Mortgage insurance required below 20% equity.
Source: CFPB Mortgage Insurance Guidance
5.Utilities
8%
Electric, gas, water, sewer, trash for a median SFH.
Source: EIA Residential Energy Consumption Survey
6.Maintenance Reserve
7%
Routine upkeep — the 1% rule, normalized monthly.
Source: Fannie Mae Home Maintenance Cost Study
7.Repair-Risk Reserve
5%
Unplanned repairs (leaks, breakers, appliances).
Source: HomeScore Repair-Risk Model
8.Major-System Replacement Reserve
6%
Sinking fund for roof, HVAC, water heater, panel, sewer.
Source: HomeScore Lifecycle Model™

Why "PITI" is the wrong unit

PITI — principal, interest, taxes, insurance — was invented to answer a banker's question: can this borrower service the loan? It is not designed to answer the question every homeowner actually has to live with: what does this house cost me to keep?

That gap is where most first-year owners get hurt. A 2024 Fannie Mae National Housing Survey found that homeowners consistently underestimate the true ongoing cost of ownership by 30–40%. The CFPB's Owning a Home toolkit hints at the missing layers but stops short of naming them.

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The eight layers, in plain English

Here's how each layer actually behaves in a real owner's budget — what moves it, what controls it, and where the surprise risk sits.

1. Principal & Interest ~52%
Mortgage payment at the prevailing 30-year fixed rate.
2. Property Taxes ~13%
State and local property tax assessed on home value.
3. Homeowners Insurance ~6%
Hazard insurance premium; rising with climate exposure.
4. PMI / MIP ~3%
Mortgage insurance required below 20% equity.
5. Utilities ~8%
Electric, gas, water, sewer, trash for a median SFH.
6. Maintenance Reserve ~7%
Routine upkeep — the 1% rule, normalized monthly.
7. Repair-Risk Reserve ~5%
Unplanned repairs (leaks, breakers, appliances).
8. Major-System Replacement Reserve ~6%
Sinking fund for roof, HVAC, water heater, panel, sewer.

How to use the True Cost Index

The Index is built to do three jobs.

Before you buy: pressure-test the home you're considering. A 28% housing-to-income ratio against PITI alone often hides a 35%+ ratio against the True Cost.
After you close: fund the four non-PITI layers explicitly. Maintenance reserve, repair-risk reserve, and replacement reserve should be three separate buckets, not one.
Five+ years in: re-run the Index annually. The replacement reserve grows as your roof, HVAC, water heater, panel, and sewer line clock down toward end of life.

Sources behind the model

The True Cost Index is calibrated against public data: Freddie Mac PMMS for mortgage rates, US Census ACS for property taxes, NAIC for insurance, EIA RECS for utilities, Fannie Mae for maintenance benchmarks, NAR for market data, and CFPB for consumer disclosure standards. The repair-risk and replacement reserve layers use the proprietary HomeScore Lifecycle Model™.

Frequently Asked Questions

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Maintenance Priority Builder
Map a budget against the work your house needs first.
Cost Estimator
Personalized replacement windows and savings targets.

Major system costs

Plan for surprises

True Cost of Homeownership
The framework behind every number on this page.
Home Financial Health Report
$79 flagship snapshot — what your house actually costs.
First-Year Owner Playbook
What new owners learn in month 3 the hard way.

The True Cost of Homeownership: an 8-layer framework for 2026

1.Principal & Interest

2.Property Taxes

3.Homeowners Insurance

4.PMI / MIP

5.Utilities

6.Maintenance Reserve

7.Repair-Risk Reserve

8.Major-System Replacement Reserve

Why "PITI" is the wrong unit

Stop guessing what year three will cost. Run every layer, live.

The eight layers, in plain English

1. Principal & Interest ~52%

2. Property Taxes ~13%

3. Homeowners Insurance ~6%

4. PMI / MIP ~3%

5. Utilities ~8%

6. Maintenance Reserve ~7%

7. Repair-Risk Reserve ~5%

8. Major-System Replacement Reserve ~6%

How to use the True Cost Index

Sources behind the model

Frequently Asked Questions

What is the true cost of homeownership?

Why is the mortgage payment only half the story?

How much should I budget for home maintenance?

What is a repair-risk reserve and why do I need one?

What is a major-system replacement reserve?

How is the True Cost Index different from PITI?

How much do utilities really cost?

Does property tax change after I buy?

When does PMI go away?

How much does homeowners insurance cost in 2026?

What's the difference between routine maintenance and a repair?

How do I figure out the replacement timeline for my systems?

Should I include closing costs in true cost?

Is the True Cost Index the same as 'cost of ownership' or 'total cost of homeownership'?

Does HOA fit into the True Cost Index?

What's the right emergency fund for a homeowner?

How often should I re-run the True Cost Index?

Can I just buy a home warranty instead of funding a replacement reserve?

How does the True Cost Index help with affordability?

Is this financial advice?

Track every True Cost layer for your home — month over month, live.

Calculate it

Major system costs

Plan for surprises