A larger down payment lowers your monthly mortgage payment and the total interest you pay over the life of the loan

When you put down more money upfront, you borrow less from the lender. A smaller loan means a smaller monthly payment. If you put 20 percent down instead of 5 percent on a $300,000 house, you borrow $240,000 instead of $285,000—that difference shows up immediately in your payment and compounds over 15, 20, or 30 years.

A larger down payment also reduces the total interest you pay. Interest is calculated on the loan balance, so borrowing less means paying less interest overall. On a $300,000 home with a 7 percent interest rate over 30 years, the difference between a 5 percent down payment and a 20 percent down payment can be $60,000 to $80,000 in total interest paid—though the exact amount depends on your rate, term, and local taxes.

Beyond the payment itself, a larger down payment can unlock better interest rates. Lenders see less risk when you have more skin in the game, and they sometimes offer lower rates to borrowers with down payments of 20 percent or more. A rate reduction of even 0.25 percent compounds significantly over 30 years.

Key Takeaways

  • A larger down payment reduces the loan amount, which lowers your monthly payment and the total interest paid over the life of the mortgage.
  • Putting down 20 percent or more may may have access to you for a lower interest rate from the lender.
  • Down payments above 20 percent eliminate private mortgage insurance (PMI), which adds $100 to $300 per month to your payment on smaller down payments.
  • The trade-off is that a larger down payment ties up cash you might use for emergencies, home repairs, or other investments.
  • The benefit of a larger down payment depends on your interest rate, loan term, and how long you plan to stay in the home.

How down payment size affects your monthly payment

Your monthly payment is built from three parts: principal (the amount borrowed), interest (the lender's fee), and taxes and insurance (your escrow account). A larger down payment shrinks the principal, which shrinks the payment directly.

On a $300,000 home at 7 percent interest over 30 years, a 5 percent down payment ($15,000) means you borrow $285,000. Your principal and interest payment alone is roughly $1,896 per month. A 20 percent down payment ($60,000) means you borrow $240,000, and your principal and interest payment drops to roughly $1,597 per month—a difference of $299 before taxes and insurance are added in.

That $299 difference compounds over 360 monthly payments. Over 30 years, you pay $107,640 less in principal and interest alone. Add in the interest savings from a lower rate (if you may have access to), and the total savings can exceed $150,000.

Private mortgage insurance and the 20 percent threshold

Private mortgage insurance (PMI) is a monthly fee lenders charge when your down payment is less than 20 percent. PMI protects the lender if you default; it does not protect you. The cost typically ranges from 0.5 to 1.5 percent of your loan amount per year, paid monthly.

On a $285,000 loan (5 percent down on a $300,000 home), PMI might cost $120 to $360 per month. That fee stays on your payment until you reach 20 percent equity in the home through a combination of down payment and principal paydown. Depending on your rate and how fast you pay down the loan, that can take 5 to 10 years.

A down payment of exactly 20 percent eliminates PMI entirely from day one. That single threshold saves you tens of thousands of dollars over the life of the loan. If you cannot reach 20 percent, putting down as much as you can still reduces the PMI amount and the time you pay it.

Interest rate reductions with larger down payments

Lenders price risk into your interest rate. A borrower with 5 percent down is riskier than one with 20 percent down, so the lender charges a higher rate to compensate. The difference is usually 0.25 to 0.5 percent, though it varies by lender, loan type, and market conditions.

A 0.5 percent rate reduction on a $240,000 loan over 30 years saves roughly $40,000 in total interest. That reduction alone can justify the effort to save for a larger down payment, especially if you plan to stay in the home for more than seven years.

Not all lenders offer rate reductions for larger down payments, and the reduction is not automatic—you have to ask. When you get rate quotes, specify your down payment amount and ask whether a larger down payment would lower your rate. Compare the quotes side by side to see the real difference.

The trade-off: cash on hand versus payment savings

A larger down payment saves money on interest and PMI, but it ties up cash you might need for emergencies, home repairs, or other investments. A new roof, a furnace replacement, or a major plumbing repair can cost $5,000 to $15,000. If you put every dollar into your down payment, you may not have reserves when the house needs work.

Financial advisors often recommend keeping three to six months of living expenses in savings before putting extra money toward a down payment. If you have high-interest debt (credit cards above 6 percent), paying that down first usually makes more sense than maximizing your down payment.

The math also depends on how long you stay in the home. If you plan to move in five years, the interest savings from a larger down payment may not offset the closing costs and realtor fees you pay when you sell. If you plan to stay 15 years or longer, a larger down payment almost always pays off.

Down payment size and loan type

Conventional loans (the most common type) typically require a minimum down payment of 3 to 5 percent, though some lenders go as low as 3 percent. FHA loans allow down payments as low as 3.5 percent but charge mortgage insurance for the life of the loan, regardless of how much equity you build. VA loans and USDA loans may allow zero down payment for borrowers who meet their requirements.

The larger your down payment, the more loan types become available to you, and the better terms you can negotiate. A 20 percent down payment on a conventional loan is the gold standard—it eliminates PMI, often qualifies you for the best rates, and gives you the most flexibility if you need to refinance later.

How to calculate your own savings

You can estimate your own savings using a mortgage calculator. Enter the home price, your interest rate, and your loan term, then run the calculation twice: once with your planned down payment and once with a larger amount. The calculator will show you the monthly payment, total interest paid, and (on some calculators) the PMI cost.

The difference between the two scenarios is your savings. Multiply the monthly payment difference by 360 (for a 30-year loan) to see the total over the life of the loan. Subtract your down payment difference to see the net benefit after accounting for the extra cash you are putting down.

This calculation is rough—it does not account for taxes, insurance, or rate changes—but it gives you a realistic picture of whether saving for a larger down payment makes sense for your situation.

Frequently Asked Questions

Does a down payment of 15 percent save as much as 20 percent?

A 15 percent down payment saves money compared to 5 percent, but you still pay PMI because you are below the 20 percent threshold. You get some of the payment reduction benefit, but you lose the PMI elimination and may not may have access to for the best interest rates. The savings are real but smaller than jumping to 20 percent.

Can I put down more than 20 percent?

Yes. Putting down 25, 30, or even 50 percent further reduces your monthly payment and interest costs. The benefit per additional dollar decreases as your down payment grows, but the savings are still real. The main question is whether that cash would be better used elsewhere—paying off debt, building emergency savings, or investing.

What if I cannot save 20 percent?

Put down as much as you can while keeping three to six months of expenses in savings. A 10 percent down payment saves more than 5 percent, even with PMI. You can also refinance later to remove PMI once you reach 20 percent equity, though refinancing costs money and takes time.

Does a larger down payment help if interest rates are very high?

Yes, but the math changes. When rates are high, the monthly payment is already large, so the percentage savings from a larger down payment is smaller in dollar terms. However, you still eliminate PMI and may still may have access to for a rate reduction. Calculate both scenarios to see whether saving for a larger down payment is worth the delay in buying.

Can I use a gift or loan for my down payment?

Most lenders allow gift money from family members, though they require a signed letter stating it is a gift, not a loan. Some lenders have limits on how much of your down payment can be a gift. Loans from family members are usually not allowed because they count as debt and affect your debt-to-income ratio. Ask your lender about their specific rules before accepting money from anyone.