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This calculator helps you to explore your borrowing options and what house you could afford to buy.

Your mortgage is a complex calculation based off many factors and will be different for every lender but depends mostly on:

  • your salary, where higher salary multiples become available as your salary increases
  • your cash, where better interest rates become available, the lower your loan-to-value ratio

Buying a house is also an investment. Your return on investment will be the gain in house value minus the costs of moving, stamp duty and the interest element of your mortgage payments.

This can be compared to inflation and how your cash would perform if it were invested in a global equity tracker fund. The comparison with a global equity tracker fund assumes that those gains can be realised tax-free.

Depending on your fixed rate period, every 2, 5, or 10 year window is compared from 1985 to 2025 to create the expected investment outcomes.

Income

£
Regular income before tax for all buyers
£
Amount of cash, liquid assets or cash realisable from selling a house which can be invested
Period for which mortgage rates are fixed for
Region where the house will be bought which affects expected return and stamp duty
£
Including estate agent selling fees, surveys, removals, mortgage application fees etc.

Mortgage

x
The best salary multiple achievable on your salary. Data from Virgin Money
%
The best mortgage rate achievable for your fixed rate period. Data from USwitch
£
The maximum house value you could buy
£
The mortgage you would need at that maximum house value
%
The loan to value for that maximum house value
£
The monthly mortgage payment at that maximum house value
£
The stamp duty payable on that maximum house value

Return

%
Mean Consumer Price Index (CPI) for 1985-2025. Data from the ONS
%
Mean MSCI World Index growth for 1985-2025. Data from MSCI, using EUR value exchanged into GBP pre-1999 at ONS historical rates
%
Mean house price growth for the selected region from 1985-2025 (where available). Data from the ONS
x
The ratio of maximum house value to cash investment, showing how much your cash is leveraged
%
Expected house growth multiplied by maximum leverage, showing the best possible leveraged return on your cash investment, ignoring moving costs and taxes
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