What the Down Payment Calculator does
This calculator works out the down payment on a home, car, bike or phone at any percentage or amount, the loan that leaves, its monthly EMI and total interest, and how long it will take to save the cash you need. A comparison table shows the same purchase at 0% to 50% down, so you can see exactly what a bigger deposit saves.
It covers the money you need on the day as well as the deposit: stamp duty, registration, processing fees or closing costs go in "other upfront costs". The EMI uses the standard reducing-balance formula, the same one banks use. Everything is calculated in your browser and nothing you enter is sent anywhere.
How to use it
- Choose the currency and enter the price of the home, car or bike.
- Enter the down payment as a percentage (20% is a common starting point for homes) or switch to Amount and type the sum you plan to pay.
- Add any other cash you need up front - stamp duty and registration in India, closing costs in the US, dealer fees for a car - so the savings goal is the full figure.
- Enter the loan's interest rate and term to see the EMI and the total interest over the life of the loan.
- Optionally enter what you have saved, what you can save each month and what your savings earn, to see how long until you have the cash.
Reading the results
The big number is the down payment itself. The line beside it adds the upfront costs, which is the cash you actually need on the day.
Loan-to-value (LTV) is the loan as a share of the price. 20% down means 80% LTV. Home lenders price and approve loans partly on this figure, which is why the deposit matters beyond the monthly payment.
The comparison table and the bars show total interest at each deposit level. A bigger deposit always means a smaller loan and less interest, but it also means more months of saving - and the price may change while you save.
Time to save assumes you put the same amount away every month and that the savings rate stays fixed. Months are rounded up, so "2 years 1 month" means the goal is reached during that 25th month.
Worked example: a Rs 60 lakh flat in India
The flat costs Rs 60,00,000. A 20% down payment is Rs 12,00,000, leaving a Rs 48,00,000 loan - 80% loan-to-value. Stamp duty, registration and fees add Rs 4,20,000, so the cash needed is Rs 16,20,000.
At 8.5% for 20 years the EMI is about Rs 41,656. Over 240 months that is Rs 99,97,324 paid, of which Rs 51,97,324 is interest.
With Rs 5,00,000 saved and Rs 40,000 a month going into an account earning 6.5% a year, the Rs 11,20,000 gap closes in 25 months; without interest it would take 28 months.
Putting 30% down instead cuts the EMI to about Rs 36,449 and the total interest by about Rs 6,50,000, but needs Rs 6,00,000 more cash and a year more of saving at the same rate.
Formulas and scoring rules
- Down payment
deposit = price x down_payment_pct / 100- Loan and loan-to-value
loan = price - deposit; LTV = loan / price x 100- EMI (reducing balance)
EMI = loan x i x (1 + i)^n / ((1 + i)^n - 1)i is the yearly rate / 12 / 100 and n the number of months; with a 0% rate the EMI is loan / n. Computed with the shared XtFin PMT function; money is shown rounded to the rupee, dollar or pound.- Total interest
total_interest = EMI x n - loan- Cash needed
cash = deposit + upfront_costs- Months to save
smallest m with saved x (1 + s)^m + monthly x ((1 + s)^m - 1) / s >= cashs is the savings rate / 12 / 100; solved with XtFin NPER and rounded up to a whole month.
How much down payment do you need?
There is no single rule; it depends on the lender, the country and what you are buying. For homes in the US, a conventional loan with less than 20% down usually requires private mortgage insurance, so 20% is a common target, though many loan programmes accept less. In India, RBI rules cap the loan-to-value on individual housing loans, with a lower cap for bigger loans, so buyers need at least a 10-25% contribution of their own, and stamp duty and registration are usually paid from savings too. In the UK, lenders usually ask for at least a 5% or 10% deposit, and rates tend to improve as the deposit grows.
Car and two-wheeler loans often cover 80-100% of the on-road price, so the down payment is a choice rather than a requirement. A larger deposit still pays: the interest rate on a vehicle loan is usually higher than on a home loan, so every rupee or dollar you do not borrow saves more.
Limitations: what the result does not prove
- It is an estimate, not a loan offer. Lenders set the rate, the maximum loan-to-value, fees and eligibility from your income, credit history and the property or vehicle.
- The EMI assumes a fixed rate for the whole term. Floating-rate loans change their EMI or tenure when rates move, and prepayments shorten the loan - neither is modelled here.
- Upfront costs are whatever you enter. Stamp duty, registration and closing costs vary by state and country and can be several per cent of the price; check the current rate where you are buying.
- Saving time assumes a constant monthly amount and savings rate, and ignores tax on interest and price changes while you save.
Privacy: where your data goes
Everything you paste, type or drop is processed in this browser tab. It is not uploaded, logged, stored or sent to analytics. Session recording and tag-manager scripts are switched off on this page.
Standards and sources
- CFPB - What is private mortgage insurance?
- Reserve Bank of India - Master Circulars (housing finance, loan-to-value)
Frequently asked questions
How much down payment do I need for a house?
Many buyers aim for 20%, because US conventional loans below 20% down usually need mortgage insurance and Indian housing loans are capped at a loan-to-value limit. Smaller deposits are possible with some loans; enter different percentages to see how the loan and EMI change.
How much down payment is needed for a car loan?
Lenders often finance 80-100% of a car's price, so 10-20% down is common rather than required. A bigger down payment means a smaller loan and less interest: on a 9 lakh car at 9% for five years, every extra lakh you put down cuts the EMI by about Rs 2,076.
What is the minimum down payment for a two-wheeler or bike?
It varies by lender and offer - some schemes ask for 10-15% or even less. Enter the bike's on-road price and try 10%, 15% and 25% to compare the EMI and the total interest before you pick an offer.
Is it better to make a bigger down payment?
It lowers the EMI and the total interest, and on a home it can also get you a better rate or avoid mortgage insurance. The cost is a longer wait to save and less cash left for emergencies. The comparison table shows both sides for your numbers.
Do stamp duty and registration count as part of the down payment?
No - they are extra costs on top of the deposit, and in India lenders generally do not include them in the loan. Add them as upfront costs so the savings goal shows the full amount of cash you need on the day.
How long will it take to save for a down payment?
Divide what you still need by what you can save each month, and add any interest your savings earn. Rs 11.2 lakh at Rs 40,000 a month takes 28 months with no interest, or 25 months at 6.5% a year. The calculator works this out exactly.
Last reviewed by the A2Z.Tools team against the sources listed above.
