Down Payment Calculator
Work out your deposit amount and remaining loan balance for a home or car purchase with this free down payment calculator.
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Before you rely on this: Estimates only — not financial, tax or legal advice. Confirm current rates, fees and rules before relying on these figures.
How to use this calculator
- Enter the purchase price and your deposit percentage.
- Read the deposit amount and the loan you'll need.
How it works
Deposit = price × percent ÷ 100; the loan is the rest of the price.
Worked example
$500,000 at 20% down. Deposit $100,000, loan $400,000.
Common mistakes
- Forgetting upfront costs beyond the deposit — stamp duty, legal and inspection fees.
- A deposit under 20% often triggers lenders mortgage insurance (LMI).
Frequently asked questions
How much deposit do I need?
Multiply the purchase price by your target deposit percentage. A 20% deposit on a $600,000 home is $120,000; the tool also shows the loan amount left.
Why does a bigger deposit matter?
A larger deposit reduces the loan, the interest paid and often the need for lenders' mortgage insurance, which applies below about 20% in many markets.
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Cite this tool
Zerdly. (2026). Down Payment Calculator. Retrieved from https://www.zerdly.com/tools/down-payment-calculator/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.