Down Payment Calculator
Figure out your target down payment, whether you'd need PMI, and how long it will take to save enough.
How Different Down Payments Compare
| Down payment | Loan amount | PMI required? |
Down Payment Calculator: Formula, Worked Examples & Complete Guide
In two sentences: You don’t need 20% down to buy a home — conventional loans commonly allow 5%, FHA allows 3.5%, and some programs go as low as 3% or even 0% for eligible VA and USDA borrowers, though anything under 20% typically triggers PMI. This guide shows the exact formula, worked examples at different down payment sizes, and the real trade-offs buyers weigh between a smaller down payment and a larger one.
What Is a Down Payment Calculator?
A down payment calculator converts a percentage into a dollar amount (or vice versa) and shows you the resulting loan amount — the foundation number every other mortgage calculation builds on.
The Down Payment Formula
Down Payment ($) = Home Price × Down Payment %
Loan Amount = Home Price − Down Payment
Down Payment % = Down Payment ($) ÷ Home Price
The 20% Myth
The most persistent misconception in homebuying is that 20% down is required. <cite index=”64-1″>Nearly a third of prospective homebuyers think they need a down payment of 20% or more to buy a home, according to a Freddie Mac survey</cite> — but <cite index=”64-1″>Freddie Mac’s own Home Possible and HomeOne programs allow as little as 3% down</cite>. In reality, <cite index=”65-1″>the average down payment for first-time homebuyers is just 8%</cite>, well under the commonly assumed 20% threshold.
Minimum down payments by loan type
| Loan Type | Minimum Down Payment |
|---|---|
| Conventional (first-time buyer programs) | 3% |
| Conventional (standard) | 5% |
| FHA | 3.5% |
| VA (eligible veterans/service members) | 0% |
| USDA (eligible rural buyers) | 0% |
| Jumbo | Typically 10–20% |
Worked Examples
Example 1: A $400,000 home at three down payment levels
| Down Payment % | Down Payment $ | Loan Amount | Approx. Monthly P&I (6.75%, 30yr) |
|---|---|---|---|
| 3% | $12,000 | $388,000 | ~$2,516 |
| 8% (avg. first-time buyer) | $32,000 | $368,000 | ~$2,387 |
| 20% | $80,000 | $320,000 | ~$2,076 |
Going from 8% to 20% down roughly doubles your upfront cash requirement but saves about $311/month on principal and interest alone — before even counting the PMI you’d eliminate.
Example 2: The full cost comparison including PMI
Same $400,000 home, comparing 5% down to 20% down over the first 8 years (roughly how long it typically takes to reach 20% equity through amortization alone):
- 5% down: $20,000 upfront, loan of $380,000, plus an estimated $200–280/month in PMI until the loan balance falls to 80% LTV.
- 20% down: $80,000 upfront, loan of $320,000, no PMI from day one.
The 5%-down buyer keeps an extra $60,000 in the bank on day one but pays roughly $19,000–$27,000 in cumulative PMI over that 8-year stretch — money that builds no equity and isn’t tax-deductible for most filers.
What Buyers Actually Argue About
This trade-off generates constant debate in personal-finance communities. In one widely discussed thread on the professional forum Blind, a buyer weighing 20% down against 5% down with PMI got split advice: <cite index=”62-1″>some commenters argued that PMI is an unnecessary, non-deductible expense worth waiting to avoid, while others who chose 5% down and PMI reported strong equity gains within a few years and felt investing the difference sooner had worked out</cite>. A related thread comparing 20% versus 10% down reached a practical rule of thumb: <cite index=”68-1″>PMI isn’t always required even below 20% down — some lenders skip it entirely for borrowers with a low debt-to-income ratio — and whether a smaller down payment makes sense comes down to comparing the annual PMI cost against the expected return on investing the money you didn’t put down</cite>.
There’s no universal right answer. The math depends on your specific PMI rate, how long you expect to hold the loan before refinancing or reaching 20% equity, and your risk tolerance for investing money instead of parking it in home equity.
Step-by-Step: How to Use This Calculator
- Enter the home price you’re considering.
- Enter a down payment percentage (try 3%, 10%, and 20% to compare) or a specific dollar amount you have available.
- Review the resulting loan amount.
- Cross-check whether that down payment percentage triggers PMI (anything under 20% on a conventional loan generally does — see the PMI Calculator).
- Compare the monthly payment difference against how much cash you’d have left in savings at each down payment level.
What Affects the Right Down Payment for You
- Your PMI rate. Higher PMI rates make a larger down payment pay for itself faster.
- How long you’ll keep the loan. If you expect to refinance or sell within a few years, PMI costs less in total, tilting the math toward a smaller down payment.
- Your cash reserves. Draining your entire savings for a 20% down payment can leave you without an emergency fund — most advisors recommend keeping 3–6 months of expenses in reserve regardless of down payment size.
- Local market competitiveness. In competitive markets, a larger down payment can make your offer more attractive to sellers, independent of the financing math.
- Down payment assistance programs. Many states and municipalities offer grants or forgivable loans that can cover part of a down payment for qualifying first-time buyers.
Where Down Payment Money Actually Comes From
Most buyers assume a down payment has to come entirely from personal savings, but lenders accept several documented sources:
- Personal savings — the most straightforward source, requiring 2–3 months of bank statements showing the funds have “seasoned” (sat in the account) rather than appearing suddenly.
- Gift funds — a relative can gift down payment money on most loan types, with a signed gift letter confirming it doesn’t need to be repaid.
- 401(k) or IRA withdrawals/loans — some retirement accounts allow penalty-free early withdrawals for a first home purchase (up to $10,000 lifetime from an IRA), or a loan against a 401(k) balance.
- Down payment assistance programs — many states, counties, and cities offer grants or forgivable second loans specifically for first-time or income-qualified buyers, sometimes covering the entire minimum down payment.
- Sale proceeds from a prior home — for move-up buyers, equity from selling a current home is the most common down payment source.
Down payment assistance: an underused resource
Down payment assistance programs exist in nearly every state, yet remain underused largely because buyers don’t know to search for them. These programs range from small grants covering a few thousand dollars in closing costs to full down payment coverage for qualifying low-to-moderate income buyers. Eligibility typically depends on household income relative to your area’s median income, and many programs require completing a homebuyer education course. If you’re short on down payment cash but otherwise well-qualified, checking your state housing finance agency’s website before assuming you need to save longer is worth the ten minutes it takes.
Frequently Asked Questions
Not necessarily. It avoids PMI and lowers your monthly payment, but it also ties up a large amount of cash. Whether that’s the right move depends on your PMI rate versus your expected return if that money were invested elsewhere instead.
0% for qualifying VA and USDA borrowers. For most other buyers, 3% (conventional first-time-buyer programs) or 3.5% (FHA) are the realistic floors.
No — your down payment size is a personal financial decision based on your savings, your risk tolerance, and your loan program, not a market-driven number.
Yes, on most loan types, though lenders require a gift letter and documentation showing the funds are a genuine gift, not a loan that has to be repaid.
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Note: This calculator and article are provided for general educational and informational purposes only and do not constitute financial or lending advice. Down payment requirements, PMI rates, and assistance program availability vary by lender, loan type, and location. Always confirm current requirements with a licensed mortgage lender.