Useful next calculations
When to use this calculator
- Before comparing mortgage products, brokers or repayment types.
- When you want to test how a different deposit, rate or term changes the payment.
- When you need a quick estimate before using a formal illustration or agreement in principle.
- When you are stress-testing your budget against a higher rate.
A worked example
These are the example figures the calculator opens with.
| Input | Value |
|---|---|
| Annual Household Income ($) | $60,000 |
| Monthly Debt Payments ($) | $300 |
| Deposit Available ($) | $30,000 |
| Mortgage Interest Rate (%) | 4.5% |
For those figures the calculator returns:
- Max Home Price: $227,901.35
- Max Mortgage: $197,901.35
- Deposit: $30,000.00
- Max Monthly Payment: $1,100.00
- Income Multiple: 3.30
Method & assumptions
This calculator estimates how much you may be able to borrow and the price range of homes potentially within reach, based on standard UK mortgage affordability rules. It applies a common income multiple — typically 4 to 4.5 times gross annual income — and adds your stated deposit to arrive at an indicative maximum purchase price. The result is a guide only; your actual borrowing limit will depend on a full lender affordability assessment that considers your credit history, monthly outgoings, number of dependants, and the specific mortgage product you apply for. Interest rates used for illustrative monthly payment figures do not represent a quote. Always speak to a qualified, financial regulator-authorised mortgage adviser before making any property purchase decisions.
Common mistakes
- Mixing up loan amount and property value, which distorts affordability and LTV.
- Using a headline rate but forgetting fees, insurance or repayment type.
- Testing only one term length instead of comparing payment and total cost together.
- Treating the result as a lender decision rather than a planning estimate.
What to do next
- Run a second scenario with a cautious assumption so you can see the downside clearly.
- Compare the result with the related calculators below before making a decision.
- Check current local rules, eligibility and provider terms before applying or committing money.
- Keep a record of the assumptions so you can update the estimate when a quote, bill or pay figure changes.