Mortgage Deposit Savings Calculator
Our mortgage deposit calculator shows how long it takes to reach your deposit target and what LTV you achieve at different deposit sizes.
Saving for a Deposit
Work out how long to save your deposit and which LTV thresholds you can reach.
Enter the property price you are targeting and your current savings. Then add your monthly saving amount and the interest rate on your savings account. The calculator projects how long it will take to reach each deposit threshold: 5%, 10%, 15%, and 20%. A larger deposit reduces both the loan and the rate offered. The 85% LTV tier (15% deposit) and 80% LTV tier (20% deposit) typically offer meaningfully better rates than 90% or 95% products. The calculator also shows how house price growth — if any — affects your real position: saving hard while prices rise can mean the target keeps moving. A Lifetime ISA adds a 25% government bonus on up to £4,000 per year, which can meaningfully accelerate deposit building for first-time buyers purchasing under £450,000.