UK Money Tools LTV & Deposit Calculator
See your mortgage share and compare it with a target loan to value.
Step 1
Your figures
Enter your details below. Your estimate updates automatically.
Step 2
Your LTV estimate
Loan to value (LTV)
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Extra money needed for your target
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Deposit / equity
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See the breakdown
Mortgage amount
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Deposit / equity percentage
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Maximum mortgage at your target LTV
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Total deposit / equity required at your target
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How it is calculated
Mortgage and property value
About this calculator
See your mortgage share and compare it with a target loan to value.
What these figures mean
LTV is the mortgage divided by the property value, expressed as a percentage. In purchase mode the mortgage is the price minus your deposit. For an existing mortgage, equity is the current value minus the mortgage balance. LTV above 100% means negative equity, and is shown without capping the percentage.
Worked example
On a £300,000 purchase with a £30,000 deposit, the mortgage is £270,000 and the LTV is 90%. Reaching an 85% target at the same property value would mean a £255,000 mortgage and £45,000 deposit, so another £15,000 would be needed.
Assumptions and exclusions
Target comparisons assume the property value stays unchanged. In negative equity, the visual shows the property value and shortfall against total mortgage debt. Lenders use their own valuation and affordability assessment; this calculator does not promise approval, a rate or a maximum affordable loan. Mortgage fees added to the loan, other secured borrowing, shared ownership and equity loans are outside this single-mortgage model.
Frequently asked questions
How do I calculate loan to value?
Divide the mortgage balance by the property value and multiply by 100. For example, a £180,000 mortgage on a £240,000 property has a 75% LTV. When buying, the mortgage is the purchase price minus your deposit.
How much equity do I need to reach a target LTV?
The target mortgage is the property value multiplied by the target LTV percentage. Required deposit or equity is the property value minus that mortgage. The calculator compares this with your current deposit or equity, assuming the property value stays unchanged.
Does a lower LTV guarantee a mortgage offer?
No. This calculator compares mortgage and property values. It does not assess affordability, credit history or lender eligibility, and it excludes fees added to the mortgage and other secured borrowing.
How does a larger deposit change my LTV?
For the same purchase price, a larger deposit reduces the mortgage required and therefore lowers the LTV. For example, a £30,000 deposit on a £300,000 home gives a £270,000 mortgage and 90% LTV.
What happens if my mortgage is higher than the property value?
The LTV will be above 100%, which indicates negative equity. The calculator shows the shortfall between the property value and mortgage balance rather than treating it as positive equity.