Down Payment Calculator
Down payment amount and loan balance from price and percentage.
Down payment
$80,000.00
20% of $400,000.00
Loan amount
$320,000.00
Price
$400,000.00
AI Breakdown & Smart Takeaway
Plain-English insight on your numbers
Get a personalized explanation of what these results mean — and how to improve them.
How the Down Payment Calculator works
The Down Payment Calculator helps homebuyers and borrowers instantly determine how much money they need upfront and how large their resulting loan balance will be, given any property price and down payment percentage. It's an essential starting point for anyone budgeting for a home purchase, vehicle loan, or any major financed asset.
At its core, this calculator takes two inputs — the total purchase price and the down payment percentage you plan to put down — and returns two critical outputs: the actual dollar amount of your down payment and the remaining loan balance your lender will need to finance. For example, on a $400,000 home with a 10% down payment, the calculator immediately shows you $40,000 due at closing and a $360,000 mortgage. This arithmetic is simple, but having it calculated instantly allows you to test dozens of scenarios in seconds, which is where the real value lies.
The percentage you choose to put down has cascading effects well beyond just the loan balance. In the US mortgage market, putting down less than 20% on a conventional home loan typically triggers Private Mortgage Insurance (PMI), an added monthly cost that can range from 0.5% to 1.5% of the loan amount annually. Crossing the 20% threshold eliminates PMI entirely, which can save hundreds of dollars per month. Government-backed loans like FHA mortgages allow down payments as low as 3.5%, while VA and USDA loans can require zero down — so the right target percentage depends heavily on your loan type, credit profile, and financial goals.
A common mistake buyers make is treating the down payment as the only upfront cost. In reality, closing costs typically add another 2%–5% of the loan amount, and you'll also want a cash reserve for moving expenses, immediate repairs, and an emergency fund. This means the dollar figure the calculator produces for your down payment is your minimum cash commitment, not your total out-of-pocket need. Savvy buyers use the calculator to back-solve: they enter the maximum down payment they can afford and check whether the resulting loan balance produces a monthly payment within their budget, using an amortization calculator as the next step.
When using this calculator to compare scenarios, pay attention to the trade-off between a larger down payment and liquidity. Putting 30% down instead of 20% lowers your loan balance and monthly payment, but it locks more capital into an illiquid asset. In a rising-rate environment, that interest savings may be significant; in a low-rate environment, investing the extra cash elsewhere might yield better returns. The calculator gives you the numbers to anchor this decision — pair it with current mortgage rate data and your personal financial picture to choose the percentage that truly optimizes your situation.
Formula
Down Payment Amount = Purchase Price × (Down Payment % ÷ 100) Loan Balance = Purchase Price − Down Payment Amount
Pro tips
- Test the 20% threshold specifically — use the calculator to find the exact dollar amount needed to hit 20% down on your target home price, then compare it to a 10% or 15% scenario and factor in estimated PMI costs to see whether the PMI savings justify a longer saving period.
- Work backwards from your savings: enter your available cash as the down payment amount and solve for what purchase price that represents at different percentages — this reveals your realistic home price ceiling before you start shopping.
- Always calculate the loan balance alongside your target debt-to-income (DTI) ratio; most conventional lenders require DTI below 43%, so use the resulting loan balance to estimate monthly principal and interest and verify you stay within that limit.
- If you're receiving gift funds or down payment assistance, enter the combined total as your down payment to see how even a $10,000–$15,000 grant shifts your loan balance and potentially eliminates PMI.
- Revisit this calculator after every significant market price change — in a volatile real estate market, a 5% drop in home prices can meaningfully change how much cash you need and may allow you to reach a favorable LTV tier sooner than expected.
Key terms
- Down Payment
- — The upfront cash amount paid by the buyer at closing, expressed as a percentage of the total purchase price, which reduces the amount that must be financed through a loan.
- Loan-to-Value Ratio (LTV)
- — The ratio of the mortgage loan amount to the appraised value of the property, calculated as Loan Balance ÷ Purchase Price × 100; a lower LTV generally means better loan terms.
- Private Mortgage Insurance (PMI)
- — A mandatory insurance premium charged by lenders on conventional mortgages when the borrower's down payment is less than 20%, protecting the lender against default risk.
- Principal
- — The original loan balance — the portion of the purchase price not covered by the down payment — on which interest is calculated and which is gradually repaid over the loan term.
- Closing Costs
- — Additional fees and expenses beyond the down payment paid at settlement, typically 2%–5% of the loan amount, including appraisal fees, title insurance, and lender origination charges.
- Earnest Money Deposit
- — A good-faith deposit made when an offer is accepted, typically 1%–3% of the purchase price, which is usually credited toward the down payment at closing.
