yCalculator

Down Payment Calculator

Last updated: May 2026

Target deposit

Lifetime ISA

LTVDepositTypical rateMonthly payment
95%£15,0005.5%£1,750.15
90%£30,0004.8%£1,547.09
85%£45,0004.5%£1,417.37
80%£60,0004.2%£1,293.46
75%£75,0003.9%£1,175.24
60%£120,0003.6%£910.80

Lifetime ISA bonus

Save up to £4,000 per year in a LISA and the government adds 25%, up to £1,000 per year. On this savings plan, the estimated LISA bonus is £3,000, reducing the savings time by about 1 years 7 months.

Remember to budget for Stamp Duty on top of your deposit. Use the Stamp Duty Calculator.

How much deposit do I need?

UK buyers usually need at least a 5% deposit, but larger deposits unlock lower loan-to-value tiers and often better mortgage rates. A 10% deposit is more widely available than 5%, while 20-25% deposits tend to access more competitive deals.

LTV explained

Loan-to-value, or LTV, is the mortgage as a percentage of the property price. A 30,000 pound deposit on a 300,000 pound property means a 270,000 pound mortgage and 90% LTV. Lower LTV usually means lower risk for the lender and a cheaper mortgage rate.

Lifetime ISA vs Help to Buy ISA

Help to Buy ISAs are closed to new applicants, but existing accounts can still be used if eligible. Lifetime ISAs remain available to eligible first-time buyers and add a 25% government bonus on contributions up to 4,000 pounds per tax year.

First-time buyer schemes

First-time buyer support changes over time and depends on location, property price, and personal circumstances. Always check current scheme rules, LISA withdrawal conditions, and mortgage lender criteria before committing to a savings plan.

Related Finance calculators

finance calculators

Business Loan Repayment Calculator

Calculate monthly repayments, total interest and true cost of a business loan

Calculate →

finance calculators

APR Calculator

Calculate the true annual percentage rate on a loan including interest, arrangement fees, insurance and mandatory charges

Calculate →

finance calculators

Take-Home Pay Calculator

Calculate your exact take-home pay after income tax, National Insurance, student loan and pension deductions

Calculate →

You might also need

finance calculators

Mortgage Affordability Calculator

Calculate how much you can borrow for a mortgage based on your income and outgoings

Calculate →

finance calculators

Mortgage Repayment Calculator

Calculate monthly mortgage repayments, total interest and the impact of overpayments

Calculate →

finance calculators

Stamp Duty Calculator

Calculate Stamp Duty Land Tax for residential property purchases in England and Northern Ireland

Calculate →