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House Affordability Calculator

Calculate how much house you can afford based on income, debts, and down payment. Plan your home purchase wisely.
What This Calculator Helps You Do
Use the inputs below to test scenarios, compare outcomes, and interpret the result before acting on it.

House Affordability Calculator is designed to give you a fast answer, but it also provides supporting context such as formulas, worked examples, FAQs, and charts so the result is easier to validate.

For the best result, use realistic input values, review the assumptions in the explanation panels, and compare multiple scenarios if you are planning a decision based on the output.

Decision Context
Page-specific guidance for using this result in a real planning decision.

This calculator helps turn income, debts, down payment, and rate assumptions into a realistic home-price range instead of a guess based on listing prices.

Use it before home shopping so your search range is grounded in payment capacity and lender-style affordability logic.

The output is most useful when treated as a ceiling, not a target, because maintenance, closing costs, moving expenses, and lifestyle goals still need room in the budget.

Calculator
Enter your values

Car loans, credit cards, student loans, etc.

Analysis
Interpretation of the current calculator output

Enter values to see detailed analysis and insights.

How to Use

Step-by-step instructions
  1. 1Enter your annual gross income
  2. 2Input your total monthly debts (car loans, credit cards, etc.)
  3. 3Set your down payment percentage (typically 20%)
  4. 4Add current mortgage interest rate
  5. 5Specify loan term (typically 30 years)
  6. 6Review maximum affordable house price

House Affordability Formula

Uses the 28/36 rule: housing costs shouldn't exceed 28% of gross income, and total debt shouldn't exceed 36%.
Max Monthly Payment = min(Income × 28%, Income × 36% - Debts) Max House Price = Loan Amount ÷ (1 - Down Payment %)

Variables:

28% RuleMax housing payment as % of gross income
36% RuleMax total debt payments as % of gross income
Loan AmountCalculated from max monthly payment
Down PaymentUpfront payment as % of house price

Example

Home Buyer Example

Inputs:

Gross Income:$80,000/year
Monthly Debts:$500
Down Payment:20%
Interest Rate:6.5%
Loan Term:30 years

Steps:

  1. 1.Max housing payment = $80,000 × 28% ÷ 12 = $1,867
  2. 2.Max total debt = $80,000 × 36% ÷ 12 = $2,400
  3. 3.After debts: $2,400 - $500 = $1,900 (take minimum)
  4. 4.Affordable loan at 6.5%/30yr = ~$298,000
  5. 5.With 20% down: $298,000 ÷ 0.8 = $372,500 house
Result:
Can afford ~$372,500 house with $74,500 down payment

Frequently Asked Questions

What is the 28/36 rule?

28%: Housing costs (mortgage, taxes, insurance) should not exceed 28% of gross monthly income. 36%: Total debt payments (housing + other debts) should not exceed 36% of gross income.

How much down payment should I make?

20% avoids PMI (private mortgage insurance). Less is possible but costs more monthly. More reduces loan amount and interest. FHA loans allow as low as 3.5%.

What other costs should I budget for?

Beyond mortgage: property taxes (1-2% of home value annually), homeowners insurance ($1,000-3,000/year), HOA fees, maintenance (1% of home value/year), utilities, and closing costs (2-5% of price).
In-depth guideBrowse Financial calculators
House Affordability Calculator Guide
Detailed usage notes, assumptions, mistakes to avoid, and related tools.

House Affordability Calculator helps turn the available inputs into a result that is easier to check, compare, and explain. Calculate how much house you can afford based on income, debts, and down payment. Plan your home purchase wisely.

Use this page as part of the broader financial workflow when you need a repeatable calculation instead of a one-off estimate.

Formula And Variables
How the calculator turns inputs into an answer.

House Affordability Formula is the main method behind this calculator. The equation is Max Monthly Payment = min(Income × 28%, Income × 36% - Debts) Max House Price = Loan Amount ÷ (1 - Down Payment %), and the calculator applies it consistently as you change the inputs.

The most important variables are: 28% Rule is max housing payment as % of gross income, 36% Rule is max total debt payments as % of gross income, Loan Amount is calculated from max monthly payment, Down Payment is upfront payment as % of house price. Check those values first if the output looks higher or lower than expected.

How To Use The Result
What to compare before acting on the output.

The worked example on this page uses Gross Income = $80,000/year, Monthly Debts = $500, Down Payment = 20%, Interest Rate = 6.5%, Loan Term = 30 years and produces Can afford ~$372,500 house with $74,500 down payment. Use that example as a quick check for the calculation flow before entering your own values.

For practical use, read the house affordability calculator result as a decision-support number. It is strongest when you compare two or more scenarios using the same units and assumptions.

Data Visualization And Analysis
Different chart views answer different questions about the same calculator output.

Best ways to read the charts

Use a bar chart when you need to compare separate result components, a line or area chart when the output changes across steps or time, and a pie-style distribution when every value is part of one total.

When the page shows multiple chart tabs, start with the overview, then check the ranking view to see which value drives the result most strongly.

What the analysis should tell you

Compare the average, range, highest value, lowest value, and dominant contributor before making a conclusion from the main number alone.

If one value contributes most of the total, test that assumption first. If values are spread evenly, the result is usually driven by the full input set rather than a single outlier.

Common Mistakes
  • Do not mix units unless the calculator explicitly converts them for you.
  • Avoid copying a result without checking whether the inputs describe the same time period, measurement system, or scenario.
  • If the answer looks surprising, change one input at a time so you can identify which assumption is driving the output.
When The Result May Be Inaccurate

The result can be inaccurate if inputs use mixed units, rounded source data, outdated rates, or assumptions that do not match the situation being modeled.

Run a second scenario with conservative inputs when the output will affect a purchase, project, health decision, academic answer, or financial plan.

House Affordability Calculator is an educational planning tool. It should not replace advice from a qualified professional who can review the full context and current rules.

Long-tail Guides For This Calculator
These pages answer more specific versions of the same search intent.
How Much House Can I Afford With Down Payment

Use income, debt, rate assumptions, and down payment size to estimate a realistic home-price range before you start shopping or request preapproval.

Related Calculators
Continue through the same topic cluster with crawlable internal links.
Additional Questions

How accurate is House Affordability Calculator?

House Affordability Calculator is accurate for the formula and inputs shown on the page. Real-world accuracy depends on whether the values you enter are complete, current, and measured in the expected units.

What should I check before using the house affordability calculator result?

Check the input units, review the formula section, compare the worked example, and run at least one alternate scenario if the result will support a decision.