How Much House Can You Afford? 5 Methods Compared (2026)
There are two very different answers to "how much house can you afford." The first is what the bank will approve. The second is what you can actually afford without stressing your finances. These numbers often differ by $100,000 or more — and treating the bank's number as your budget is one of the most common ways people end up house-poor.
This guide runs five different affordability calculations side by side using a real income example, explains what each method is actually measuring, and tells you how to pick the number that matches your financial situation — not your lender's maximum tolerance for risk.
The 5 Affordability Calculation Methods
We'll run all five calculations for the same buyer profile: $100,000 gross annual income ($8,333/month), $500/month in existing debt payments (car + student loan), 20% down payment available, 740 credit score, 6.89% interest rate (30-year fixed).
$8,333 × 28% = $2,333/month PITI
At 6.89% with $700/month in estimated taxes/insurance, $2,333/month supports a $250,000–$270,000 loan, or roughly a $310,000–$335,000 home price with 20% down.
$8,333 × 36% = $3,000/month total
Housing max = $3,000 − $500 (existing debt) = $2,500/month
With $2,500 for housing and $700 for taxes/insurance, the principal and interest can be $1,800/month — supporting roughly a $275,000 loan or a $345,000 home price.
Moderate: $100,000 × 3.0 = $300,000
Aggressive: $100,000 × 4.0 = $400,000
The income multiple method is a quick sanity check used in financial planning. In 2021 low-rate environments, 5–6x was common. With 2026 rates near 7%, 2.5x–3x is more appropriate to maintain manageable payments relative to income.
$8,333 × 45% = $3,750 max total debt
Housing max = $3,750 − $500 = $3,250/month
Lenders often approve up to 43–50% total DTI. At $3,250 in housing costs minus $700 taxes/insurance, P&I of $2,550 supports a $390,000+ loan — or roughly a $488,000 home. This is what the bank will approve. It is not a budget recommendation.
Take-home pay: ~$6,250 (after taxes at $100K)
Living expenses (food, transportation, childcare, etc.): ~$2,800
Savings goal (10%): ~$625
Remaining for housing: ~$2,825/month
The stress-test method starts from your actual take-home pay, subtracts real expenses and savings goals, and sees what's left for housing. It also adds 1–2% of home value annually for maintenance. On a $350,000 home, that's $292–$583/month in maintenance you must budget separately from the mortgage.
Method Comparison — $100K Income Buyer
| Method | Home Price Budget | Monthly Housing | Best For |
|---|---|---|---|
| 28% Rule | ~$315,000 | $2,333 | Conservative, single income |
| 36% Debt Rule | ~$345,000 | $2,500 | Standard financial planning |
| Income Multiple (3x) | ~$300,000 | ~$2,300 | Quick sanity check |
| Stress-Test | ~$340,000 | ~$2,825 | Most realistic for actual budget |
| Lender Maximum (45% DTI) | ~$488,000 | $3,250 | Bank ceiling — not a recommendation |
Assumes 20% down, 6.89% 30-year fixed, $500/month existing debt. Taxes/insurance estimated at $700/month.
The "Hidden Costs" That Make Lender Approvals Misleading
Lenders calculate DTI using your documented debts — the ones on your credit report. They don't account for:
- Groceries, utilities, childcare, healthcare, and transportation beyond existing loans
- Your personal savings rate or retirement contributions
- Vacation, entertainment, and lifestyle spending
- Home maintenance (typically $250–$500/month on a $350K home)
- HOA fees (if applicable — can be $200–$800/month)
- A rate increase if you're getting an ARM
- Property tax reassessment after purchase
The Consumer Financial Protection Bureau defines "affordable" differently than most lenders. Their CFPB affordability guidance emphasizes total housing cost vs. actual take-home income, not gross income DTI ratios.
Affordability Table by Income and Down Payment (2026)
| Gross Annual Income | 3% Down Budget | 10% Down Budget | 20% Down Budget |
|---|---|---|---|
| $60,000 | ~$170,000 | ~$190,000 | ~$210,000 |
| $80,000 | ~$220,000 | ~$250,000 | ~$280,000 |
| $100,000 | ~$275,000 | ~$305,000 | ~$340,000 |
| $120,000 | ~$330,000 | ~$365,000 | ~$405,000 |
| $150,000 | ~$410,000 | ~$455,000 | ~$505,000 |
| $200,000 | ~$545,000 | ~$600,000 | ~$665,000 |
Based on 28% rule, 6.89% rate, $600/month property tax + insurance estimate, minimal other debt. Regional property tax and insurance differences will shift these numbers significantly.
Should You Buy at Your Maximum or Below It?
Financial planners generally recommend staying 10–15% below your maximum qualified amount. On a $400,000 maximum, that's targeting homes under $350,000. This buffer gives you:
- Room for property taxes and insurance to increase over time
- Funds for maintenance and unexpected repairs
- Ability to absorb a temporary income disruption
- Continued progress on retirement savings
- A financial cushion that prevents the anxiety of living at your limit
Plug different home prices into the HipoCalc mortgage calculator and vary the property tax and insurance inputs for your target city. The goal is to find the monthly payment that fits comfortably — not just technically qualifies. If $2,500/month feels tight, aim for $2,200. Your comfort with the monthly payment matters more than maximizing the purchase price.
For more detail on how your debt load affects approval and pricing, see our debt-to-income ratio guide.
Frequently Asked Questions
How much house can I afford on an $80,000 salary?
On $80,000/year ($6,667/month gross), the 28% rule allows $1,867/month in housing costs. At 6.89% for 30 years with 20% down, that supports a home price of approximately $230,000–$260,000 depending on property taxes and insurance in your area. With minimal other debt and a 20% down payment, you could stretch to around $280,000.
Is it better to use bank approval amount or a personal budget method?
Personal budget methods are almost always more conservative and more realistic. Banks approve based on maximum DTI thresholds — they don't account for your savings goals, lifestyle costs, or financial comfort level. Most financial advisors recommend targeting 25–28% of gross income for housing, not the 43–50% DTI maximums lenders technically allow.
What income do you need to afford a $400,000 house in 2026?
With 20% down ($320,000 loan) at 6.89%, P&I is approximately $2,107/month. Add $650/month for taxes and insurance, and total housing costs are around $2,757/month. At the 28% rule, you'd need roughly $117,750/year gross income. With other debt under the 36% total DTI limit, you could qualify at lower income, but housing would consume a large portion of take-home pay.