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Home Affordability Calculator

Loan

Find out what price home you can afford based on your income, savings, and existing debt payments. Calculates maximum home price and required down payment.

Reviewed by the thecalcu.com team · Last updated July 20, 2026

🇺🇸This tool is specific to United States
$130$62,500
$0
$0$625,000
515
530
3070

Affordable Home Price

$121,969
Maximum Loan Amount
$109,469
Monthly Mortgage Payment
$950
Down Payment as % of Home Price
10.25%
Down Payment Amount
$12,500

Breakdown

How the total splits

Maximum Loan Amount
$109,469
Down Payment Amount
$12,500

This calculator computes your Affordable Home Price, Maximum Loan Amount, Monthly Mortgage Payment, Down Payment as % of Home Price, Down Payment Amount from the values you enter.

Inputs
Monthly Net IncomeExisting Monthly Debt PaymentsDown Payment AvailableHome Loan Interest RateLoan TenureDTI (Debt-to-Income Ratio)
Outputs
Affordable Home PriceMaximum Loan AmountMonthly Mortgage PaymentDown Payment as % of Home PriceDown Payment Amount

What is a Home Affordability?

A Home Affordability Calculator tells you the maximum home price you can realistically target based on your income, savings, and current debt obligations. It combines two numbers most buyers calculate separately: the maximum mortgage you'd qualify for, capped by your income and debt-to-income (DTI) ratio, and the down payment you're bringing to the table.

That's different from a basic loan calculator, which only tells you the loan portion. This tool adds your down payment on top to give you the full property budget, the number you actually need before you start touring homes or talking to a lender.

Home prices vary enormously across the US, from under $200,000 in parts of the Midwest to well over $1 million in coastal metros like San Francisco or New York. Knowing your ceiling before you start looking keeps you from falling for a listing you can't actually close on.

The calculation flow is straightforward:

  1. Income × DTI% minus existing debt payments = the maximum monthly payment you can service
  2. That payment, reverse-calculated at your loan rate and term = the maximum loan amount
  3. Maximum loan + down payment savings = your affordable home price

Once you have a target price, the Mortgage Calculator fills in the rest of the monthly cost, property taxes, insurance, PMI, and HOA fees, that this tool deliberately leaves out.

Why Use a Home Affordability Calculator?

The most common home-buying mistake is house hunting outside your actual budget, falling for a place, then either overstretching to make it work or getting disappointed when the numbers don't line up. This calculator anchors your search to a realistic price range before you ever contact an agent.

It also makes the trade-offs visible. Saving an extra $10,000 for your down payment lets you target a home $10,000 more expensive while simultaneously shrinking your loan, which lowers both your monthly payment and the interest you'll pay over the life of the mortgage. Run the Debt-to-Income Ratio Calculator first if you're not sure where your DTI currently stands.

Who Should Use This Calculator?

First-time buyers setting a realistic budget before they start browsing listings or talking to a real estate agent.

Renters weighing a move to ownership, this shows the income level at which buying actually becomes viable given current rates and local prices.

Couples applying together, comparing what a single income supports versus what changes once both incomes and both sets of existing debts are combined.

Buyers deciding between a bigger down payment and a bigger loan. The interplay here shows exactly how much home price shifts with each extra dollar saved for down payment versus financed.

Anyone refinancing or moving up who wants to check what a new price range looks like before selling their current home, pair this with the Mortgage Refinance Calculator if you're also considering refinancing your existing loan.

What Insights Does the Home Affordability Calculator Give You?

Affordable Home Price, your loan plus down payment combined. This is the number to treat as your search ceiling.

Maximum Loan Amount, the mortgage portion alone. It also tells you, indirectly, how much more down payment you'd need if you want to target a higher home price without increasing your loan.

Monthly Mortgage Payment, the principal-and-interest payment on the maximum loan. Compare this against your current rent to gauge what the transition to ownership will actually cost month to month.

Down Payment as % of Home Price, this is your loan-to-value ratio from the buyer's side. Below 20% typically means PMI applies; the PMI Calculator shows exactly what that costs and how long it sticks around.

How to use this Home Affordability calculator

  1. Enter your Monthly Net Income, your take-home pay after taxes (add a co-borrower's income if applying jointly).
  2. Enter Existing Monthly Debt Payments, car loans, student loans, credit card minimums, and any other recurring obligations.
  3. Enter Down Payment Available, the savings you're ready to put toward this purchase.
  4. Set the Home Loan Interest Rate to a rate you've been quoted, or a current market average if you haven't shopped yet.
  5. Set the Loan Tenure, 30 years is standard, 15 years if you're prioritizing a faster payoff.
  6. Adjust the DTI (Debt-to-Income Ratio) if your lender has told you a different qualifying threshold.
  7. Read the Affordable Home Price as your realistic search budget.
  8. Check the Down Payment %, under 20% means factoring in PMI, which you can model separately in the PMI Calculator.

Formula & Methodology

Step 1, Maximum Affordable Monthly Payment

Max Payment = (Monthly Income × DTI%) − Existing Debt Payments

Step 2, Maximum Loan via Reverse Amortization

Max Loan = Max Payment × [1 − (1 + r)^-n] ÷ r

Step 3, Affordable Home Price

Affordable Home Price = Max Loan + Down Payment

Worked example: Monthly income $9,000, existing debt payments $300, down payment $60,000, rate 7%, term 30 years, DTI 50%.

1. Max payment: ($9,000 × 50%) − $300 = $4,200
2. r = 0.5833%/month; n = 360 months
3. Max loan: $4,200 × [1 − (1.005833)^-360] ÷ 0.005833 ≈ $631,900
4. Affordable home price: $631,900 + $60,000 = $691,900

Down payment needed at different loan-to-value ratios:

| Home Price | 5% down | 10% down | 20% down (no PMI) |
|---|---|---|---|
| $300,000 | $15,000 | $30,000 | $60,000 |
| $500,000 | $25,000 | $50,000 | $100,000 |
| $750,000 | $37,500 | $75,000 | $150,000 |
| $1,000,000 | $50,000 | $100,000 | $200,000 |

Frequently Asked Questions

A Home Affordability Calculator combines your loan eligibility with your available down payment to determine the total home price you can realistically afford. Your income and existing monthly debt payments set a maximum loan amount using a debt-to-income (DTI) rule, and adding your down payment savings gives you the full property budget. It answers the practical question 'what's my maximum home price?' instead of just 'what loan will I qualify for?'
Conventional loans typically require at least 3-5% down, FHA loans go as low as 3.5%, and VA loans can require 0% for eligible veterans. Putting down less than 20% usually means paying [PMI](/pmi-calculator/) until your loan balance drops to 78% of the original home price. A bigger down payment lowers your loan amount, which cuts both your monthly payment and total interest paid.
The calculator first works out your maximum monthly payment using the DTI rule: max payment = income × DTI% minus existing debt payments. That payment is then reverse-calculated into a maximum loan amount at your chosen interest rate and tenure. Your down payment savings get added on top of that loan amount to arrive at the maximum home price, for example, a $380,000 loan eligibility plus $95,000 down payment gives a $475,000 affordable home price.
Use your net take-home income, after taxes and standard payroll deductions like 401(k) contributions. Lenders generally look at gross income for DTI qualification, but budgeting off net income gives you a more honest picture of what you can actually afford month to month. If you're applying with a co-borrower, add both incomes together.
Check current rates from a few lenders since they shift with the market and your credit profile; a 0.5% difference on a $400,000 loan changes the monthly payment by roughly $120. Use the average quoted rate for a 30-year fixed as a starting point if you haven't shopped rates yet. Your actual rate will depend on your credit score, loan type, and down payment size.
Most US home buyers use a 30-year fixed-rate mortgage because it minimizes the monthly payment, even though it costs more in total interest than a 15-year loan. A 15-year term pays off faster and saves a substantial amount in interest, but the monthly payment is noticeably higher for the same loan amount. Run both terms through this calculator to see how much affordability changes either way.
No, this calculator estimates loan-based affordability using principal and interest only. Once you have a target home price, run it through the [Mortgage Calculator](/mortgage-calculator/) to see the full monthly payment including property tax, homeowners insurance, PMI, and HOA fees, since those can add several hundred dollars a month on top.
DTI, or debt-to-income ratio, is the share of your gross monthly income that goes toward debt payments, including the new mortgage. Most conventional lenders cap total DTI around 43-50%, though a lower ratio gets you better loan terms and more breathing room in your budget. This calculator defaults to 50% but you can tighten it if you'd rather be conservative.
Combining incomes for DTI purposes usually increases your maximum loan amount significantly, since the lender is now qualifying against two paychecks instead of one. If one applicant earns $5,000 a month and a co-borrower earns $4,000, the combined $9,000 supports a much larger mortgage payment at the same DTI ratio. Keep in mind existing debts for both borrowers also get counted.
The 28% rule suggests your monthly housing payment shouldn't exceed 28% of gross income, more conservative than the 43-50% DTI ratios lenders typically allow. Financial planners often recommend keeping total home price under 3-4 times annual household income for comfortable affordability, well below what this calculator's DTI ceiling might suggest. Leaving that gap gives you room for retirement savings, emergencies, and other goals.
Not necessarily, the output here is a lending ceiling, not a spending recommendation. Many buyers are happier staying meaningfully under the maximum, since it leaves room for repairs, furnishing, and the [closing costs](/closing-costs-calculator/) due at signing that this figure doesn't include.
They don't, this calculator shows the home price your loan and down payment can support, not the cash you'll need at the closing table. Closing costs typically run 2-5% of the purchase price on top of your down payment, so check the [Closing Costs Calculator](/closing-costs-calculator/) once you have a target price to see the full cash needed to close.

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This calculator is step 1 of 5 in our US Home Buying Planner.

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Also known as
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