When to use this affordability estimate
Use this calculator when the unknown is the rough property price that could fit the income, debt and down-payment assumptions entered. If you already have a price or loan amount, use the mortgage payment calculator to test the monthly payment instead.
For a side-by-side chooser, read Mortgage Payment vs Mortgage Affordability.
Example flow: range first, payment second
A household might start with 96,000 in gross annual income, 600 in existing monthly debt payments, a 60,000 down payment and a 30-year mortgage assumption. This calculator estimates a planning range from those inputs. A specific 375,000 listing can then be checked in the payment calculator using the same rate, term and housing-cost assumptions.
How this mortgage affordability calculator works
The calculator starts with gross monthly income, subtracts existing monthly debt payments from the selected total debt limit, then compares that with the selected housing-cost limit. Recurring housing costs reduce the amount left for an estimated mortgage payment.
Income, debts and housing-cost limits
The housing-cost limit is the share of gross monthly income used for mortgage and recurring housing costs. The total debt limit includes those housing costs plus existing monthly debts. These are user-entered planning limits, not lender rules.
What debt-to-income means in plain English
Debt-to-income compares monthly debt payments with gross monthly income. In this tool, the total debt ratio includes estimated housing costs and existing monthly debts, so higher existing debt leaves less room in the estimate.
Why deposit and loan-to-value matter
The usable deposit is added to the estimated affordable loan amount. A maximum loan-to-value assumption can reduce the estimated property price if the deposit is small relative to the loan size.
What this calculator does not include
This calculator does not provide mortgage approval, credit assessment, local borrowing rules, grant eligibility, tax advice, legal advice or a promise that a home is affordable. It is a general estimate based only on the assumptions entered.
Key terms and assumptionsFormula notes, key terms, source assumptions and limits used in this calculator.
These notes are specific to this calculator. Read the property methodology notes for shared property formulas, region settings and estimate limits.
- Gross income
- Income is entered before tax and deductions. It is not the same as take-home pay.
- Housing-cost limit
- The selected housing-cost limit is treated as a planning assumption, not a lender rule.
- Total debt limit
- Existing monthly debts reduce the estimated monthly amount available for housing costs.
- Recurring housing costs
- Property taxes or rates, insurance, shared-property fees, mortgage insurance and other costs reduce the estimated mortgage payment budget.
- Loan-to-value
- The maximum loan-to-value field can cap the property price estimate when the usable deposit is low.
- Region settings
- Region settings change defaults, labels and currency formatting only. They do not convert exchange rates or create country-specific results.
- General estimate
- The result is not mortgage approval and does not include credit assessment, lender rules, grants, tax or legal rules.
Guides and methodology
Plain-English notes that explain the assumptions behind related calculators and tools.
Related calculators
- Mortgage Payment Calculator Estimate monthly mortgage or home-loan payments from property price, deposit, interest rate, loan term, repayment type, taxes, insurance and fees.
- Debt-to-Income Calculator Estimate front-end and back-end debt-to-income ratios from income, housing costs and monthly debt payments.
- Down Payment Calculator Estimate deposit or down payment amount, loan amount, loan-to-value, purchase costs and savings gap for a home purchase.
- Mortgage Comparison Calculator Compare two mortgage scenarios by payment, interest, fees, remaining balance and estimated total cost over time.
- Rent vs Buy Calculator Compare renting and buying over a selected holding period using rent, mortgage, ownership costs, transaction costs, property growth and opportunity cost.
- Extra Mortgage Payment Calculator Estimate how extra monthly or one-off mortgage payments could change payoff time, total interest and payoff date.
- Mortgage Refinance Calculator Compare a current mortgage with a possible new loan using payment change, refinance costs, break-even months and interest difference.
- Rental Property Calculator Estimate pre-tax rental property cash flow, gross yield, net yield, cash-on-cash return and break-even rent.
FAQs
Is this the same as mortgage approval?
No. It is a planning estimate and does not assess credit, lender rules, documents or approval.
Is this a borrowing power calculator?
It can be used as a simple borrowing-power estimate. It works from the income, debt, deposit and housing-cost assumptions entered rather than lender-specific approval rules.
What income should I enter?
Enter the gross annual income you want the estimate to use before tax and deductions.
What are monthly debt payments?
Include required monthly payments for debts such as loans, credit cards or other obligations.
What is a housing-cost ratio?
It is the share of gross monthly income used for estimated mortgage and recurring housing costs.
What is total debt ratio?
It compares housing costs plus existing monthly debt payments with gross monthly income.
Why do property taxes and insurance reduce affordability?
They use part of the monthly housing-cost budget, leaving less room for the mortgage payment.
Does the calculator include interest-rate changes?
No. It uses the interest rate entered. The sensitivity table shows nearby rate assumptions for comparison.
Can I use this outside the United States?
Yes. Region settings change defaults, labels and currency formatting only. They do not perform exchange-rate conversion or provide local mortgage advice.
Does this include government schemes or grants?
No. It does not model local programmes, grants, taxes or legal rules.