Calculate how much you need to save for a down payment and understand your loan amount.
$
Down Payment
%
$
$
months
% p.a.
Down Payment Amount
$70,000$
Amount needed for your down payment
Loan Amount$280,000
LTV Ratio80.00%
Monthly Savings Needed$2,404
This calculator assumes your savings earn a consistent return and that you save the calculated amount monthly. LTV (Loan-to-Value) ratio indicates the percentage of the home's value you're borrowing; lower ratios typically mean better loan terms. Consult a financial advisor for mortgage pre-qualification.
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What is the Down Payment Calculator?
A down payment calculator determines how much you need to save monthly to reach your home purchase down payment goal within a specified timeframe. You input the home price, desired down payment percentage or amount, current savings, number of months to save, and expected savings return rate. The calculator then computes your required monthly savings amount (accounting for compound returns), total loan amount, and loan-to-value (LTV) ratio.
How it works
The calculator starts with your target down payment amount based on the home price and percentage you choose. It subtracts your current savings and calculates how much additional capital you need. Using the monthly savings rate and expected returns on your savings, it works backward to determine how much you must save each month to reach your goal by your target date. The LTV ratio is simply your loan amount divided by home price, expressed as a percentage.
Down Payment = Home Price × (Down Payment % / 100); Loan Amount = Home Price - Down Payment; LTV % = (Loan Amount / Home Price) × 100; Monthly Savings Needed = [Down Payment - (Current Savings × (1 + Monthly Return Rate)^Months)] / Future Value Annuity Factor
The formula accounts for compound interest earned on your current savings and calculates the monthly payment needed to reach your target using the future value of annuity formula. LTV is a key metric lenders use to assess risk; lower ratios mean you're borrowing less relative to the home's value.
Examples
Input
Result
Notes
Home price $350,000, 20% down payment, current savings $10,000, 24 months to save, 3% return
Aggressive timeline with strong down payment position means lowest LTV and best loan terms
How to use the Down Payment Calculator
Enter the home price you're targeting
Choose your down payment as a percentage (10%, 15%, 20%, etc.) or enter a specific dollar amount
Input how much you've already saved towards your down payment
Set the number of months you have until you want to purchase
Enter your expected savings return rate (e.g., high-yield savings accounts offer 4-5%; regular savings ~0.5%)
Review your monthly savings target and loan-to-value ratio
Adjust your timeline or down payment percentage if the monthly amount feels unrealistic
Benefits
Get a concrete monthly savings target so you know exactly what to save each month
Understand how compound interest on your savings helps you reach your goal faster
See how down payment percentage affects your loan amount and LTV ratio
Compare different scenarios (e.g., 20% down in 2 years vs. 15% down in 18 months)
Plan for private mortgage insurance (PMI) costs by seeing your LTV; LTV above 80% typically requires PMI
Identify realistic purchase timelines based on your current savings rate and financial capacity
Tips & common mistakes
Common mistakes
Ignoring private mortgage insurance (PMI) costs; if your down payment is less than 20%, lenders typically require PMI, which adds $100-400/month to your payment
Overestimating your savings return rate; a high-yield savings account at 4-5% is realistic, but don't assume investment returns if you need capital preservation
Not accounting for closing costs; down payment is only one part of homebuying expenses—budget 2-5% extra for title, appraisal, and other fees
Setting an unrealistic monthly savings target that strains your budget; if the number feels unachievable, extend your timeline or lower your down payment percentage
Tips
Use a high-yield savings account (4-5% APY) for your down payment fund; FDIC insurance protects up to $250,000
Automate your savings by setting up a monthly transfer on payday; consistency beats lump-sum efforts
Check your target LTV ratio; 80% or lower avoids PMI, which can save you $50,000+ over a mortgage's life
Get pre-approved for a mortgage to confirm your buying power and lock down exact loan terms before finalizing your down payment strategy
Frequently asked questions
What is the ideal down payment percentage?
20% is often considered ideal because it eliminates private mortgage insurance (PMI) and gives lenders confidence in your financial stability. However, 10-15% is common for first-time buyers, and 25-30% is excellent if you can afford it. The trade-off is monthly savings needed vs. loan size and total interest paid.
What is LTV (Loan-to-Value) ratio?
LTV is the percentage of the home's value you're borrowing. For example, if you buy a $300,000 home with a $60,000 down payment, your loan is $240,000, so LTV is 80%. Lower LTV ratios (below 80%) typically qualify for better interest rates and avoid PMI.
Do I have to put down 20%?
No. You can put down as little as 3-5% with certain loan programs (FHA, VA, USDA). However, down payments below 20% trigger private mortgage insurance (PMI), which adds to your monthly payment until you reach 20% equity. PMI typically costs 0.5-1% of your loan amount annually.
What return rate should I assume for my savings?
High-yield savings accounts currently offer 4-5% APY. Regular savings accounts offer 0.5% or less. Money market accounts and short-term CDs (certificates of deposit) fall in between at 4-4.5%. Do not assume stock market returns (7-10%) if you need the funds within a few years and can't handle market volatility.
What about closing costs?
This calculator shows down payment only. Plan to set aside an additional 2-5% of the home price for closing costs (title insurance, appraisal, inspections, attorney fees, etc.). For a $350,000 home, that's $7,000-$17,500 on top of your down payment.
Can I use a gift for my down payment?
Yes—many lenders accept down payment gifts from family members. However, the lender typically requires a gift letter stating the funds are a gift, not a loan. The remaining 'seasoned' savings (in your account for 2+ months) must usually be your own funds.