How much can I borrow?
Last checked UK · illustrative onlyNot a lender or brokerAboutDisclaimer
Published by Rodway Labs — not a mortgage adviser
A transparent income-multiple ballpark with a stress-rate payment note. This is not a lender affordability assessment or a mortgage offer.
Assumptions
- Highly simplified — not an FCA affordability test and not a lender decision.
- Default multiple 4.5× (adjustable). Commitment haircut is illustrative only.
- Does not assess credit, employment type, or lender criteria.
Your inputs
Starter figures are UK EXAMPLE values you can edit. Scenario rates, not a market quote. 4.19%, 4.39%, 4.14% and 7.49% SVR on this site are labelled EXAMPLE figures, last checked 2 November 2026. Results update as you type.
Results
Total income
£80,000
Max from multiple
£360,000
Commitment haircut (annualised)
£2,400
Indicative maximum loan
Not a lender decision
£357,600
Not a lender decision — illustrative ballpark only, not a mortgage or credit offer.
Payment at 7.14% stress
Not a lender decision — illustrative only
£2,689.40
Payment at illustrative rate
£2,065.96
Max loan given deposit & value
£310,000
Illustrative LTV (capped loan)
88.6%
Method: indicative max loan ≈ (total income × multiple) − (other monthly commitments × 12). Stress payment uses the repayment formula at illustrative rate + stress buffer. Not a lender decision.
Illustrative only — not personalised advice, not a credit or mortgage offer, and not an FCA-regulated recommendation. Your offer and ESIS set the real ERC, fees and terms. Full calculator disclaimer.
What to do next
How to use this calculator
- Enter annual income for each applicant (leave applicant 2 at zero if you are applying alone).
- Enter other monthly commitments such as loans, car finance and credit card payments.
- Choose an income multiple, an illustrative rate, a stress buffer and a term.
- Optionally add your deposit or equity and the property value to see the loan capped by LTV.
- Treat the indicative maximum loan as a ballpark only. A lender's affordability check decides what you can borrow.
Methodology and equations
Indicative max loan ≈ (total income × multiple) − (other monthly commitments × 12). Stress payment uses the repayment formula at illustrative rate + stress buffer.
The assumptions are listed in the box near the top of this page.
How this calculator works
Use this only as an income-multiple ballpark. It is not a decision in principle and not a borrowing offer.
How this is calculated
- Indicative maximum = (income 1 + income 2) × the income multiple − 12 × your monthly commitments.
- Payments on that figure are worked out with the standard repayment formula at the illustrative rate and at the illustrative rate plus the stress buffer.
- If you enter a property value, the loan is also capped at value − deposit, and LTV is shown on the smaller of the two figures.
This matches the code behind the tool. The full formulae are on the calculator methodology page.
Worked example
Scenario rates, not a market quote
A 4.5 times sketch on £40,000 income is £180,000. That is arithmetic, not a lender rule.
No income or rate on this page is a quote. Last checked 2 November 2026.
With the starter figures, £80,000 of joint income × 4.5 is £360,000, less £2,400 for £200 a month of commitments, giving £357,600. That costs £2,065.96 a month at 4.14% and £2,689.40 at a 7.14% stress rate. With a £350,000 value and £40,000 deposit, the loan is capped at £310,000, or 88.6% LTV. The FCA notes that larger lenders may make no more than 15% of new lending at 4.5 times income or above.
Limitations: what this ignores
- Credit history and employment type.
- Each lender’s own stress rate. Our 3-point buffer is an illustration, not a lender rule.
- Regional caps.
- Regulated advice. We are not FCA-authorised.
Guides that go with this tool
Questions
- Will a lender lend this amount?
- Unknown. Only a lender can agree a figure.
- What multiple should I use?
- 4 to 4.5 is a common public sketch, not a rule.
- What is a stress rate?
- A higher rate a lender uses to test whether the payment still looks affordable if rates rise. It is a test, not the rate you pay.
- Can I use this to remortgage?
- Only as a ceiling sketch.
- Is this a mortgage in principle?
- No. That comes from a lender.
Notes & FAQs
- Why do lenders quote different amounts?
- They use detailed outgoings, credit data, and stress tests. A simple multiple is only a starting point — often optimistic or pessimistic depending on your commitments.