Are property taxes and insurance included?

This estimate assumes the whole housing cap goes to principal and interest. In reality, taxes, insurance and any HOA fees eat into that budget, so treat the price as an upper bound.

Why is the down payment separate?

The DTI rules govern the monthly loan payment, which sets the maximum loan. Your down payment is added on top to arrive at the home price you can afford.

What if I have no monthly debts?

Enter 0 — the back-end cap then equals 36% of monthly income and often the front-end 28% becomes the binding constraint.

Is the House Affordability calculator free?

Yes — free to use, with no signup, no limits and no personal details required. The site is supported by advertising rather than subscriptions.

Is my data saved or sent anywhere?

No. Every calculation runs in your browser, so the numbers you type are never transmitted to us or stored on a server. Closing the tab discards them.

How accurate is the result?

The maths is exact for the inputs you give it. Accuracy in practice depends on those inputs matching your real situation — fees, rate changes and edge-case rules are the usual sources of difference. It is a planning tool, not financial advice.

Can I share or save my results?

Yes. Your inputs are stored in the page URL, so you can copy the link from the address bar (or use the share button) to bookmark a scenario or send it to someone else.

House Affordability Calculator

See the home price you could realistically afford based on income and existing debts.

Your details

Annual gross income

Monthly debt payments

Down payment

Mortgage interest rate

Mortgage term (years)

Estimated affordable home price

£350,993

Limited by the front-end DTI cap

Maximum loan

£325,993

Max monthly payment

£1,750

How this is calculated

This uses the classic 28/36 rule. Housing costs (front-end DTI) shouldn't exceed 28% of gross monthly income, and total debt payments (back-end DTI) shouldn't exceed 36%.

We take the smaller of those two caps as your maximum monthly housing payment, then back-solve the loan amount from your rate and term. Adding your down payment gives an estimated affordable home price.

Real lender criteria vary — some allow higher ratios with a strong deposit or high income, others are stricter. This is a planning estimate, not a formal decision in principle.

Who this calculator is for

This is aimed at anyone weighing up borrowing, saving or investing decisions before committing to them. It is most useful when you are comparing offers side by side, testing how sensitive a plan is to a change in rate or term, or sanity-checking a figure a lender or adviser has quoted you.

Assumptions and accuracy

Results assume the interest rate you enter stays fixed for the whole term and that payments are made on schedule. Real products may carry arrangement fees, early-repayment charges, variable rates, or different compounding intervals, all of which change the total. Use this to compare options, then confirm the exact figures with the provider.

Frequently asked questions

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