About the Down Payment Calculator
The Down Payment Calculator computes the cash needed to buy a home, the resulting loan amount, monthly mortgage payment at live FRED 30-year fixed rates, the PMI cost if you put less than 20% down, closing costs (2–5% of purchase price), and a savings timeline given your current savings and monthly contribution. A side-by-side comparison view stacks 3%, 5%, 10%, 15%, and 20% down to show the trade-off between buying sooner with PMI versus waiting to clear the 20% threshold.
It is built for first-time buyers planning the 12–36 month savings runway, anyone relocating who needs to size cash needs in a new market before pre-approval, parents helping adult children model a buy-vs-keep-renting decision, and couples deciding whether to combine down-payment savings or keep separate.
All math runs locally in JavaScript. The only external call is a once-per-day server-side fetch from the FRED API (Federal Reserve Economic Data) for the latest MORTGAGE30US series — this happens before the page renders and never sends your inputs anywhere. Target price, current savings, and contribution amounts never leave the device.
“Wait for 20% or buy now with PMI” rarely has a universal answer. In a market appreciating 6%+ annually, waiting two years to save the extra down payment usually costs more in lost equity and higher prices than PMI would have over those years. In flat or declining markets, the reverse is true — PMI becomes pure cost. The calculator shows the math both ways; the decision still depends on your local rent vs. buy gap and confidence in income stability. Closing costs and PMI rates are estimates; lock real numbers via a Loan Estimate before committing.
| Down % | Down Payment | Loan Amount | Monthly P&I | PMI |
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How Much Do You Need for a Down Payment on a House?
The down payment is the single largest upfront cost of buying a home, and it directly affects your loan amount, monthly mortgage payment, and whether you’ll need to pay private mortgage insurance. The traditional advice of “save 20%” dates back to an era when lenders had far fewer loan products. Today, conventional loans start at just 3% down for qualified buyers, and FHA loans require only 3.5%. The right amount depends on your financial situation, local market conditions, and how quickly you want to stop renting. This calculator helps you map out the full picture — not just the down payment itself, but closing costs, PMI, and a realistic savings timeline.
What Is PMI and When Do You Pay It?
Private mortgage insurance (PMI) is a monthly fee lenders charge when your down payment is less than 20% of the home’s value. PMI protects the lender — not you — in case you default. Rates typically range from 0.3% to 1.5% of the original loan amount per year, depending on your credit score and loan-to-value ratio. On a $400,000 loan with average PMI of 0.7%, that works out to about $233 per month on top of your principal and interest payment. The good news: PMI is not permanent. Under federal law, your servicer must cancel PMI once you reach 22% equity based on the original purchase price, and you can request removal at 20%. Some homeowners reach that threshold faster than expected if their property value appreciates.
The 20% Down Payment Myth
Many first-time buyers delay their purchase for years trying to save a full 20% down payment. While avoiding PMI saves money, the math does not always favor waiting. Consider a $350,000 home appreciating at 4% annually. If you wait two years to save the extra cash, that house could cost $378,560 — an increase of $28,560. Meanwhile, putting 5% down today means roughly $150 per month in PMI for about seven years, totaling around $12,600. In that scenario, buying sooner with PMI saves you nearly $16,000 compared to waiting. Every market is different, but the principle holds: time in the market often beats timing the market, especially in appreciating areas.
Closing Costs Explained
Closing costs are the fees paid to finalize your mortgage, and they catch many first-time buyers off guard. Nationally, closing costs average 2–5% of the purchase price. They include lender origination fees (0.5–1%), appraisal ($400–$700), title insurance ($500–$3,500 depending on the state), attorney fees, recording fees, prepaid property taxes, and homeowners insurance. Some of these are negotiable — particularly lender fees — and some states allow sellers to contribute toward the buyer’s closing costs (called “seller concessions”). Always request a Loan Estimate from at least three lenders so you can compare the true cost, not just the interest rate.
How to Save for a Down Payment Faster
The biggest lever for accelerating your savings timeline is automating the process. Set up a dedicated high-yield savings account earning 4–5% APY and schedule automatic transfers on payday. Treat the transfer like a bill you cannot skip. Beyond that, consider these strategies:
- Down payment matching programs — Some employers and nonprofits offer 2:1 or 3:1 matching for first-time homebuyers. Check with your HR department.
- Gift funds — FHA and conventional loans allow gift money from family for down payments. Document the source carefully; lenders require a gift letter.
- State and local assistance — Nearly every state offers down payment assistance (DPA) programs for qualifying buyers, often as forgivable loans or grants. Income limits apply but are higher than most people expect.
- Reduce high-interest debt first — Paying off a credit card charging 22% APR effectively “earns” you 22% on that money, far more than a savings account, and improves your mortgage qualification.
- Use windfalls strategically — Tax refunds, bonuses, and inheritance gifts should go directly to the down payment fund before lifestyle inflation absorbs them.
First-Time Buyer Programs: FHA vs. Conventional
FHA loans require just 3.5% down and accept credit scores as low as 580. The trade-off is an upfront mortgage insurance premium (1.75% of the loan, usually rolled into the balance) plus annual mortgage insurance of 0.55% for the life of the loan unless you refinance. Conventional loans through Fannie Mae and Freddie Mac start at 3% down for first-time buyers, have no upfront insurance fee, and allow PMI cancellation at 20% equity. Conventional loans typically require a 620+ credit score and reward higher scores with lower PMI rates. For buyers with strong credit, conventional loans usually cost less over time. For buyers with limited credit history or lower scores, FHA provides access that conventional lenders might deny.
Understanding Your Monthly Mortgage Payment
Your monthly housing cost goes well beyond principal and interest. A complete PITI breakdown includes principal (the portion that reduces your loan balance), interest (the cost of borrowing), taxes (property taxes escrowed monthly, typically 1–2% of home value annually), and insurance (homeowners insurance, averaging $1,500–$3,000 per year). If your down payment is below 20%, add PMI to that total. A good rule of thumb is that your full housing payment should not exceed 28% of your gross monthly income, though many lenders will approve up to 36% if your other debts are low. The mortgage preview in this calculator shows only the principal and interest portion — add at least 25–30% on top for the full picture.
Ready to explore your full mortgage options? Try the Mortgage Calculator for a detailed amortization schedule, or use the Home Affordability Calculator to see what price range fits your budget. Browse all Personal Finance tools for more calculators to help you take control of your money.
Frequently Asked Questions
How much down payment is required to buy a home?
Conventional loans start at 3 percent down for qualified buyers, FHA loans require 3.5 percent, VA and USDA loans can allow 0 percent down for eligible borrowers, and 20 percent avoids private mortgage insurance. The right percentage depends on budget, local market, and goals.
What is private mortgage insurance (PMI)?
PMI is a monthly fee lenders charge when the down payment is less than 20 percent on a conventional loan. It protects the lender, not the borrower, and typically ranges from 0.3 percent to 1.5 percent of the original loan amount per year.
Is it better to put 20 percent down or buy sooner?
The right answer depends on home price appreciation, mortgage rates, and rent costs in the area. In fast-appreciating markets, waiting to save 20 percent can cost more in lost equity and higher prices than a buyer would pay in PMI. Running both scenarios helps clarify the trade-off.
Are there down payment assistance programs?
Many state and local programs offer grants, forgivable loans, or low-interest second loans for first-time buyers who meet income limits. Employer-assisted housing benefits and certain professional programs, such as those for teachers and healthcare workers, can also help.
What are typical closing costs on a home purchase?
Closing costs usually run 2 to 5 percent of the purchase price and cover lender fees, title insurance, appraisal, recording fees, and prepaid items like taxes and homeowners insurance. Some buyers negotiate seller concessions to reduce the out-of-pocket amount.
