Mortgage Calculators & Property Finance Tools
Plan your mortgage before you apply.
Use our free calculators to estimate borrowing, monthly repayments, deposit requirements, loan-to-value, property taxes and buy-to-let returns. Then let Mortgage321 assess the figures against real lender criteria.
Calculators give you a starting point. Lender criteria determine the real answer.
Choose a calculator
Pick the question you’re trying to answer — no registration, no credit search, instant results.
Affordability Calculator
How much could I borrow? — Estimate a potential mortgage borrowing range.
Only regular overtime — 50% is used in this illustration.
Only regular overtime — 50% is used in this illustration.
50% of regularly received bonus is used in this illustration.
50% of regularly received bonus is used in this illustration.
Credit Commitments & Committed Expenditure
Different lenders treat credit commitments and household expenditure differently. These figures are used for illustration only. Where no monthly payment is entered for a credit card, 3% of the outstanding balance is assumed.
No commitments added.
Your Indicative Borrowing Range
Conservative Illustration
£0
Based on approximately 4× the qualifying income used in this illustration.
Indicative max property value with your deposit: £25,000
Higher Income Multiple Illustration
£0
Based on approximately 5× the qualifying income used in this illustration.
Enhanced Borrowing Illustration
£0
Based on approximately 6× the qualifying income used in this illustration.
These are illustrations, not lender affordability results.
Mortgage lenders use their own affordability models and may consider income, expenditure, credit commitments, dependants, mortgage term, interest-rate stress testing, credit profile and other circumstances. A lender may offer more or less than these illustrations.
What does this mean?
This gives you a useful planning range, but it isn't a lender decision. Different lenders may produce materially different maximum borrowing figures from the same income, because each uses its own affordability model.
Assumptions used
- •Applicant 1: Employed income: 100% of basic salary plus 50% of regularly received overtime, bonus, commission and other income.
- •Monthly commitments reduce the illustration by their annual cost multiplied by 5.
- •Credit cards without a stated monthly payment are assumed to cost 3% of the outstanding balance per month.
These are illustrations, not lender affordability results. A lender may offer more or less than the figures shown.
General calculator information — including Molly — is not personalised regulated mortgage advice. Figures shown are illustrations, not lender decisions or mortgage offers.
These calculators provide illustrations only and do not constitute financial, investment or tax advice, nor a lender assessment or acceptance decision. Speak to a Mortgage321 adviser for a personalised assessment.
Why might a lender give me a different answer?
Mortgage calculators are useful planning tools, but lenders don’t all assess applications in the same way.
Income Treatment
Not every lender uses every source of income in the same way.
Credit Commitments
Loans, credit cards and other commitments can be treated differently between lenders.
Dependants & Expenditure
Household circumstances and committed expenditure can affect affordability.
Mortgage Term
The proposed term can affect both affordability and monthly repayments.
Credit History
Credit scoring and lender criteria can affect eligibility and borrowing.
Property
The property itself can affect which lenders are prepared to lend.
Two lenders can assess exactly the same applicant and produce very different borrowing figures.
Get My Personalised Mortgage AssessmentMortgage Calculator FAQs
Short, plain-English answers to the questions we're asked most about the numbers behind a mortgage.
A calculator can estimate the numbers. We can assess the lenders.
Mortgage lenders use different affordability models, income calculations and lending criteria. If you’d like to know what your figures could mean in the real mortgage market, Mortgage321 can assess your circumstances and research suitable lenders.