Down Payment Calculator

Down Payment Calculator works in whichever direction you have the information. Give it a percentage and it returns the cash; give it the cash and it returns the percentage; give it the loan to value a lender has offered and it returns the deposit that reaches it. All three produce the same four figures: deposit, loan, LTV and monthly payment.

Loan to value is simply the loan as a percentage of the price, and it is the number lenders price on. It is the mirror image of the deposit: 20% down is 80% LTV. The reason to look at it rather than the deposit is that lenders tier their rates at round LTV numbers, so getting under a threshold can change the rate as well as the amount borrowed, which is worth far more than the last few hundred of deposit.

The comparison table runs the common deposit sizes against your own price and rate, so the trade-off between saving longer and borrowing more is visible in one place. The monthly difference between 10% and 20% down is usually larger than people expect, because it combines a smaller loan with, in practice, a better rate.

One caution worth stating plainly: the deposit is not the only cash you need. Legal fees, survey costs, land transfer taxes and moving costs come on top of it, and they are not part of the loan.

This is arithmetic, not financial advice. It tells you what the numbers do; it cannot tell you whether a decision is right for your circumstances. Fees, taxes and local rules vary, so check anything that matters against the actual offer and speak to someone qualified before committing.

Everything is worked out inside your browser. Nothing you enter is uploaded, logged or stored, which matters for the financial calculators in particular: the figures you put into them are nobody else's business.

• Shows deposit, amount to borrow, loan to value, monthly payment and deposit as a percentage together, so you are not running it twice
• A results table you can read across
• Updates as you type, with no button to press and no page reload
• Copy the result in one click
• Free, no sign-up, and it runs entirely in your browser

The down payment calculator is used by writers, developers, students, marketers and anyone else who needs the job done once without installing software. Common cases include:

• Working out the cash needed for a 10% or 20% deposit
• Checking what deposit reaches a particular loan to value
• Seeing what saving another year of deposit does to the payment
• Converting a lender's LTV offer into a cash figure
• Comparing deposit sizes on the same property