Home Affordability Calculator 2026: How Much House Can You REALLY Afford?

How much house can you afford? The blunt rules of thumb (“three times your income,” “28% of gross”) miss the modern reality of 2026: high mortgage rates, surging insurance costs, and HOA fees. This affordability calculator uses your actual income, monthly debts, down payment, and current mortgage rates to give you three honest answers — conservative, comfortable, and stretch — so you can see the full range and choose where you actually want to land.

The three affordability scenarios explained

Most calculators give you one number. We give you three because the “right” answer depends on how much margin you want for unexpected costs, career changes, or market volatility.

Conservative (housing ≤ 22% / debt ≤ 33%)

Used by financially cautious buyers and people in unstable industries. Leaves substantial cushion for raises, surprises, and aggressive savings beyond the mortgage. If you take this number, you’ll likely barely notice the mortgage payment in your budget.

Comfortable (housing ≤ 25% / debt ≤ 35%)

The realistic 2026 default. Tighter than the old 28% rule because today’s rates make the same payment buy less house. Most financial planners use something close to this for “you’ll be fine even with surprises” advice.

Stretch (housing ≤ 28% / debt ≤ 36%)

The classic banking 28/36 rule. Lenders will often approve you up to here, sometimes higher. Just because they’ll approve you doesn’t mean you should take it. This number assumes stable income, low maintenance costs, and no major life changes. Margin for surprises is thin.

How the math actually works

The calculator follows a 4-step process:

1. Calculate maximum housing payment based on your scenario’s housing-to-income ratio (22%, 25%, or 28%)
2. Calculate maximum total debt payment based on debt-to-income ratio (33%, 35%, or 36%)
3. Subtract your existing monthly debts from the total debt payment to find available room for housing
4. Solve for maximum home price by iterating: at what price does (P&I + tax + insurance + PMI + HOA) equal your maximum housing payment?

This gives you a realistic max home price — not just monthly payment, but full PITI + HOA, including PMI if your down payment is under 20%.

What’s included in “monthly housing cost”

The total housing payment your lender uses for DTI calculation includes:

• Principal & interest (the actual mortgage payment)
• Property tax (annual rate × home value ÷ 12)
• Homeowner’s insurance (typically 0.30-0.50% of home value annually, much higher in FL/CA/coastal)
• PMI (Private Mortgage Insurance) if your down payment is under 20% and conventional loan
• HOA dues if you’re buying a condo, townhome, or HOA community
• Mortgage insurance (MIP) if FHA loan — these aren’t broken out here but included implicitly via the rate

Some lenders also include flood insurance, mortgage life insurance, or special assessments. Your specific DTI calculation may vary.

What’s NOT in DTI (but should still matter)

The DTI ratio is a lender metric — it doesn’t capture the full cost of ownership. Other ongoing costs that don’t count in DTI but absolutely affect your budget:

• Maintenance and repairs: budget 1-2% of home value per year for a single-family home
• Utilities: $200-$500/month depending on home size and climate
• Furniture and improvements: new homeowners typically spend $5,000-$10,000 in the first year
• Lawn care, pest control, pool maintenance: $50-$300/month if applicable
• Special assessments: condo and HOA communities can hit you with $1,000-$10,000+ one-time levies

If your “comfortable” DTI calc says you can afford a $500K home, plan as if it’s actually $475K to leave room for these.

The 2026 reality: why old rules under-estimate cost

Three things changed since the 28% rule was popularized:

1. Higher mortgage rates

At 6.5% rates, the same monthly P&I that bought a $350K home at 3% buys $250K today. The classic rule of “monthly payment ≤ 28% of gross” works fine at low rates but pinches at current rates.

2. Insurance has surged

National average homeowner’s insurance is now ~$2,300/year (~$192/month), up 30%+ since 2020. Florida is $4,200/year, California (wildfire zones) $3,800+/year. Pre-2020 affordability calculators assumed much lower insurance costs.

3. Property tax effective rates rose with home prices

Even where mill rates didn’t change, rising home values raised property tax bills. NJ, IL, and NH households now spend 1.7-2.5% of home value on property tax annually — meaningful chunks of “affordability” that didn’t apply when home prices were lower.

How to maximize your real affordability

If the comfortable number is lower than you’d like, four levers to pull:

1. Reduce your other debts

Every $100/month of student loans, car payments, or credit card minimums reduces your maximum housing payment by ~$100. Paying off a $5K credit card balance (saving $150/mo in minimums) can add $20-$30K to your maximum home price.

2. Larger down payment

Two effects: reduces loan amount (lower P&I) AND eliminates PMI if you cross 20%. The PMI savings alone can be $100-$200/month — enough to bump your max price by $25K+.

3. Improve credit score

A 720 vs 680 credit score can swing your rate by 0.5-1.0%. On a $400K loan, that’s $200-$400/month in P&I — directly bumps your affordability.

4. Buy in a lower property tax state/county

A $400K home in NJ has $830/month property tax. The same home in TN has $237/month. That $593/month spread on a 25% housing ratio frees up $237K in additional home price you can afford. (You’d also have a different home, of course — but the lever exists.)

Related calculators

• Closing Cost Calculator — estimate cash needed at closing
• Mortgage Payoff Calculator — model extra principal payments
• FHA vs Conventional Loan Calculator — different loan programs have different DTI rules
• Property Tax Calculator (by State) — get your state’s effective rate
• Rent vs Buy Calculator — once you know what you can afford, should you buy?

Estimates based on industry-standard DTI ratios and 2026 average rates. Actual lender approval requires income documentation, credit pulls, and full underwriting. Not financial advice.