If you’ve been waiting until you have 20% saved to buy a home, you may be waiting longer than you need to — and potentially losing ground to home price appreciation in the meantime. The 20% rule originated from conventional lending guidelines designed to eliminate Private Mortgage Insurance (PMI), and while it’s still a legitimate goal, it’s far from the only path to homeownership. Buyers today can purchase a home with as little as 3% down on a conventional loan or 3.5% on an FHA loan, and some programs offer 0% down.
The real question isn’t whether you can buy with less than 20% — it’s whether you should, given your specific financial picture. That requires understanding exactly how your down payment amount affects your loan, your monthly payment, and your total cost of ownership.
Minimum Down Payment Requirements by Loan Type
| Loan Type | Min. Down Payment | Credit Score Min. | PMI / MIP | Best For |
|---|---|---|---|---|
| Conventional (Fannie/Freddie) | 3% | 620+ | PMI until 20% equity | Buyers with good credit, lower debt |
| FHA Loan | 3.5% | 580+ (10% if 500–579) | MIP for life of loan (if <10% down) | First-time buyers, lower credit scores |
| VA Loan | 0% | No official minimum | No PMI (funding fee instead) | Eligible veterans, active military, surviving spouses |
| USDA Loan | 0% | 640+ recommended | Guarantee fee (upfront + annual) | Rural and suburban buyers within income limits |
| Conventional (20%+) | 20% | 620+ | None | Buyers who can eliminate PMI entirely |
How Down Payment Size Affects Your Monthly Payment
The down payment affects your monthly payment in two ways: the loan amount itself (a larger down payment means a smaller loan and lower principal and interest payment), and whether you pay PMI. Together these can create a meaningful difference in monthly cost. Here’s what a $400,000 home looks like at different down payment amounts, assuming a 6.75% 30-year fixed rate and PMI at 0.6% annually:
| Down Payment | Amount Down | Loan Amount | P&I Payment | Est. PMI | Total Monthly |
|---|---|---|---|---|---|
| 3% | $12,000 | $388,000 | $2,516 | $194 | $2,710 |
| 5% | $20,000 | $380,000 | $2,464 | $190 | $2,654 |
| 10% | $40,000 | $360,000 | $2,334 | $180 | $2,514 |
| 15% | $60,000 | $340,000 | $2,204 | $170 | $2,374 |
| 20% | $80,000 | $320,000 | $2,074 | $0 | $2,074 |
The difference between 3% down and 20% down on this example is $636 per month — but the difference in cash required at closing is $68,000. Whether it makes more sense to put down more or invest that gap is a question that deserves real analysis. Use our Mortgage Calculator to model your exact numbers with different down payment amounts and see the payment, total interest, and full amortization schedule.
Understanding PMI: Cost, Duration, and Removal
Private Mortgage Insurance protects the lender (not you) if you default. It’s required on conventional loans when the down payment is less than 20%. PMI typically costs between 0.5% and 1.5% of the loan amount annually, paid monthly. On a $380,000 loan at 0.6% PMI, that’s $190 per month — real money, but not necessarily a reason to delay buying for years.
PMI isn’t forever on conventional loans:
- Automatic cancellation when your loan balance reaches 78% of the original purchase price (required by federal law under the Homeowners Protection Act)
- Borrower-requested cancellation when you reach 80% LTV based on original purchase price, with a good payment history
- Lender appraisal-based removal if home appreciation has pushed your equity to 20% or more (lender’s discretion, may require a new appraisal)
FHA loans work differently. If you put down less than 10% on an FHA loan, the Mortgage Insurance Premium (MIP) lasts for the life of the loan — there’s no automatic removal. This is a significant cost difference between FHA and conventional loans and a reason to switch to a conventional loan via refinance once your equity and credit score support it. The mortgage refinancing guide covers when refinancing makes financial sense.
Putting an extra $40,000 toward a down payment vs. keeping it invested involves a real trade-off. If that $40,000 grows at 7% annually in a diversified portfolio, it becomes roughly $152,000 in 20 years. The PMI savings over that same period on a $400,000 home might total $25,000–$35,000 (less once PMI is removed at 20% equity). The math doesn’t always favor the larger down payment — especially for buyers with long investment horizons and lower PMI rates.
Down Payment Assistance Programs
Many buyers don’t realize that down payment assistance (DPA) programs exist at the federal, state, and local level. These include grants that don’t need to be repaid, forgivable loans (forgiven after a certain number of years of occupancy), and deferred loans paid back only when the home is sold or refinanced. Income limits and purchase price caps apply, and programs vary significantly by state and even by county.
First-time buyers (typically defined as not having owned a home in the past 3 years) have access to the widest range of programs. Your state’s housing finance agency website is the best starting point for current programs in your area. A HUD-approved housing counselor can also walk through available options at no cost.
Compare Today’s Mortgage Rates
Your down payment amount affects which loan programs you qualify for and what rate you’ll be offered. The Mortgage Research Center connects you with lenders so you can compare real rates side by side before you commit to a purchase.
How Much Down Payment Is Right for You?
There’s no universal answer, but here’s a framework for thinking through it:
Consider a lower down payment if:
- Home prices in your market are rising and waiting costs you more in appreciation than PMI would cost
- You have high-interest debt that would be better paid off with that cash
- Your emergency fund would be depleted by a larger down payment (never drain savings below 3–6 months of expenses for a home purchase)
- You qualify for VA or USDA and can avoid PMI entirely with 0% down
- You have a strong investment portfolio and the expected return exceeds the PMI cost
Consider a larger down payment if:
- PMI costs in your range are high (above 1%) and your equity trajectory to 20% is slow
- A larger down payment meaningfully improves your loan-to-value ratio and gets you a better interest rate
- You have excess savings beyond your emergency fund and no high-interest debt
- Monthly cash flow is tight and a lower payment is more important than capital efficiency
The Mortgage Calculator lets you model exactly what your monthly payment, total interest, and amortization schedule look like at each down payment level. Pair it with the DTI Calculator to confirm you’ll meet lender requirements — most conventional lenders want a back-end DTI below 43%, and the down payment amount affects both sides of that equation through loan size and monthly payment. The full DTI guide explains how lenders use it and how to improve your ratio before applying.