house deposit calculator

Why your house deposit matters

Your deposit is the upfront amount you pay toward a home's purchase price. The larger your deposit, the smaller your mortgage, which can reduce monthly payments and potentially unlock better interest rates.

Most buyers aim for at least 5% to 20% of the purchase price. A 5% deposit may let you buy sooner, but a 10% or 20% deposit usually improves your loan-to-value ratio (LTV), giving you access to more competitive mortgage products.

How to use this calculator

• Property price: Enter the expected price of the home you want.
• Target deposit %: Choose your goal, such as 10% or 20%.
• Current savings: Add what you already have set aside.
• Monthly savings: Enter what you can consistently save each month.
• Interest rate: Optional, but useful for more realistic projections.

After clicking calculate, you’ll see your required deposit amount, remaining amount to save, estimated time to reach your target, and projected target date.

Typical deposit targets

5% deposit

Good for first-time buyers who want to enter the market sooner. Keep in mind: higher LTV loans can carry higher mortgage rates.

10% deposit

A common middle ground. It can improve mortgage options while still being achievable for many households.

20% deposit

Often the strongest position. You may get lower monthly payments, better rates, and reduced risk of negative equity if prices dip.

Extra costs beyond the deposit

Don’t forget to budget for more than just your down payment. Depending on where you live and your lender, costs may include:

• Solicitor or conveyancing fees
• Survey and valuation costs
• Mortgage arrangement and broker fees
• Moving expenses
• Stamp duty or transfer taxes (where applicable)
• Initial furnishing and repairs

How to save your deposit faster

• Automate monthly transfers into a separate savings account.
• Use a high-yield savings account or cash ISA where suitable.
• Cut high-cost subscriptions and redirect that money to your deposit fund.
• Use windfalls (bonuses, tax refunds, gifts) to make lump-sum boosts.
• Track spending weekly to avoid “small leak” expenses.

Frequently asked questions

Is a bigger deposit always better?

Financially, usually yes. A larger deposit lowers the mortgage amount and can reduce total interest paid. But don’t empty your emergency fund just to increase your deposit.

Should I wait for 20% or buy with 10%?

It depends on local home price trends, mortgage rates, and your job stability. If prices are rising quickly, buying earlier with a solid budget may be reasonable. If your income is uncertain, waiting can be safer.

Can I include gifted money in my deposit?

Many lenders allow gifted deposits from family members, but documentation is usually required. Check lender rules early.

Final takeaway

A house deposit calculator helps turn a big goal into a practical savings plan. Set a target, track progress monthly, and adjust your budget as needed. Consistency often matters more than perfection.