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See what you can borrow with our free mortgage calculator

Whether you are saving for your very first home or planning your next big move, our free mortgage calculator checks your affordability and shows you indicative monthly repayments.

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See how much you could potentially borrow
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Discover how much you can really borrow.

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Best Mortgage Broker 5 years running

£82,000 budget boost on average

Rated 4.8/5 on Trustpilot

Best Mortgage Broker 5 years running

£82,000 budget boost on average

Rated 4.8/5 on Trustpilot

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Olivia, you’ve got 7 options to buy that home worth

£300,000

We search over 100 lenders & 25 schemes to find you the best deal

That's how we increase budgets by an average £82,000 versus “standard” mortgage calculators.

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Specialist First-time buyer schemes

First-time buyer mortgage

Low deposit, low affordability, solo buyers

Enhanced affordability and lower rates for first-time buyers

utilises COMPLEX self-employed income

Self employed mortgage

Self-employed or complex income

Options for sole traders, contractors & company directors that only need one year’s accounts.

New home mortgages & schemes

New-build mortgage

Low deposit, low affordability, solo buyers

Lower deposit requirements and better rates for new build homes

family supported mortgages

Guarantor mortgages

Low affordability

Using guarantor income, savings or property to boost borrowing

Switch to a new deal

Remortgage

Employment & Income

Best rates from over 20,000 products and 100+ lenders

Part buy part rent

Shared Ownership

Low affordability

Increase your budget with the government's shared ownership scheme

Specialist speedy mortgages

Fast-track mortgage

Low deposit, low affordability, solo buyers

Lenders offering digital valuations or income verification to secure you a quick mortgage offer.

Getting started with the UK's Best Mortgage Broker, five years running

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How does a mortgage affordability calculator work?

A mortgage affordability calculator estimates how much you could borrow based on your income and deposit. Most calculators apply a standard income multiple, typically 4 to 4.5 times your annual household income, to produce a borrowing estimate.

On a joint income of £60,000, that standard formula gives you a borrowing estimate of £240,000–£270,000. But that figure is a starting point, not a ceiling. Lenders each assess affordability differently, and working with a mortgage broker who has expertise in budget-boosting schemes could increase your borrowing power well beyond what a standard calculator shows.

Why your real borrowing limit may be higher than the calculator shows

Standard mortgage calculators don't account for specialist lending schemes that can significantly increase your borrowing capacity. Products like Guarantor Mortgages, Professional Mortgages, and 5x Income Mortgages allow certain buyers to borrow at income multiples of 5x, 5.5x, or even 6x - multiples that don't appear in a standard affordability tool.

On average, Tembo customers increase their buying budget by £82,000 by accessing specialist schemes that most mortgage calculators don't check against, and your high street bank never mentions. If the calculator figure feels too low for the area you're buying in, speak to a Tembo advisor.

What affects how much you can borrow?

Lenders assess affordability based on a range of factors beyond just your income:

  • Deposit size: A larger deposit reduces your loan-to-value (LTV) ratio and can unlock better rates and higher borrowing limits. Read our guide on deposits.
  • Credit history: A strong credit score improves lender confidence and can increase the amount you're offered. Read our guide on credit scores.
  • Outgoings and commitments: Regular financial commitments, such as car finance, credit cards, and childcare, can reduce the amount lenders are willing to lend.
  • Employment type: Employed, self-employed, contractor, and agency workers are all assessed differently depending on the lender. Find out more about mortgages for these income types here.
  • Number of applicants: Buying jointly, or adding family members to the mortgage as guarantors, could increase your income used in affordability calculations, which typically increases the maximum borrowing amount.

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