House Deposit Calculator
Estimate how much deposit you need, how long it may take to save, and whether you're on track for your target timeline.
For educational purposes only. It does not include taxes, fees, closing costs, or lender-specific rules.
Why a house deposit matters
A deposit is your upfront contribution toward buying a property. The larger your deposit, the smaller your loan tends to be. That can make a major difference in your monthly mortgage payment and the total interest paid over the life of the loan.
In many markets, buyers aim for a 20% deposit because it often improves loan terms and can reduce extra costs like mortgage insurance. But you can still buy with less in many situations, depending on your lender, income, and credit profile.
How this deposit calculator helps
This tool gives you a practical savings roadmap:
- It calculates your target deposit from house price and deposit percentage.
- It shows the remaining amount after your current savings.
- It estimates how long it may take to reach your goal based on monthly saving and expected return.
- It checks whether you are on track for a specific timeline and estimates the monthly amount required.
What to include beyond the deposit
A lot of buyers focus only on the down payment, then get surprised by additional costs. Build these into your plan early:
- Closing costs: legal fees, title costs, lender charges, inspections.
- Moving and setup costs: relocation, furniture, appliances, utility setup.
- Emergency reserve: cash buffer for repairs and unexpected expenses.
- Property taxes and insurance: often paid monthly or escrowed.
Common deposit targets
5% to 10% deposit
Can get you into the market sooner. Monthly payments are usually higher, and some loans may require extra insurance.
15% to 20% deposit
A balanced target for many buyers. It often improves loan options and lowers long-term borrowing costs.
20%+ deposit
Usually gives the strongest position with lenders. Lower loan-to-value ratio can mean better rates and more flexibility.
Ways to grow your house deposit faster
- Automate savings: move money automatically on payday to a dedicated deposit account.
- Track your gap: review your remaining deposit target monthly.
- Reduce lifestyle leakage: subscriptions, impulse spending, and frequent delivery costs add up quickly.
- Use windfalls wisely: tax refunds, bonuses, and gifts can accelerate progress.
- Increase income: side work, freelance projects, or temporary overtime can materially shorten your timeline.
Example deposit scenario
Suppose you’re aiming for a $600,000 home with a 20% deposit target. You need $120,000. If you already have $35,000 saved, your remaining target is $85,000.
If you contribute $1,500 per month and earn a modest return on savings, your timeline may be around 4 to 5 years depending on interest assumptions. Small changes to monthly contribution can move the finish date significantly.
Final checklist before you buy
- Confirm your deposit target and emergency buffer.
- Check your credit report and fix issues early.
- Compare lenders and pre-approval options.
- Estimate true monthly ownership cost, not just mortgage principal and interest.
- Keep flexibility in your budget for maintenance and rate changes.
Use the calculator above as your planning baseline, then refine with real quotes from lenders and professionals in your local market.