The dollar amount depends entirely on the purchase price

A 3.5% down payment means you pay 3.5% of the home's purchase price upfront, and the lender finances the rest. On a $200,000 house, 3.5% is $7,000. On a $400,000 house, it's $14,000. The formula is simple: multiply the purchase price by 0.035.

This percentage is the minimum required by the Federal Housing Administration (FHA), which insures loans where buyers put down less than 20%. Because you're borrowing more relative to what you own, the lender requires mortgage insurance to protect themselves if you default. That insurance cost gets added to your monthly payment.

The 3.5% figure is a floor, not a ceiling. You can put down more if you have the cash. Many buyers put down 5%, 10%, or 20% to reduce their monthly payment, avoid mortgage insurance, or both.

Key Takeaways

  • A 3.5% down payment on a $300,000 house is $10,500; on a $250,000 house it is $8,750.
  • FHA loans require mortgage insurance when you put down less than 20%, which increases your monthly payment by roughly 0.5% to 1% of the loan amount per year.
  • Your down payment amount affects not only what you owe but also your interest rate, since lenders charge higher rates for lower down payments.
  • Closing costs (typically 2% to 5% of the purchase price) are separate from your down payment and must be paid at signing.

How down payment size affects your monthly payment

The down payment changes two parts of your monthly cost: the principal you're financing and the mortgage insurance you'll pay. A larger down payment means a smaller loan, which lowers your base payment. It also may eliminate mortgage insurance entirely if you reach 20% down.

On a $300,000 house at 7% interest over 30 years, putting down 3.5% ($10,500) means financing $289,500. Your base principal and interest payment is roughly $1,925 per month. Add mortgage insurance (typically $145 to $290 per month on an FHA loan), and you're paying $2,070 to $2,215 monthly before taxes and homeowners insurance.

If you put down 20% ($60,000) on the same house, you finance $240,000. Your principal and interest payment drops to roughly $1,598 per month, and mortgage insurance disappears entirely. The difference is $400 to $600 per month—or $4,800 to $7,200 per year.

What costs are separate from your down payment

Your down payment is not the only money you need at closing. Closing costs typically run 2% to 5% of the purchase price and cover the lender's fees, title insurance, appraisal, inspection, and other services. On a $300,000 house, that's $6,000 to $15,000 on top of your down payment.

Some lenders allow you to roll closing costs into the loan, which means you don't pay them upfront but you pay interest on them for 30 years. Others require you to pay them in cash at signing. Ask your lender which costs can be financed and which cannot.

You may also need cash for a home inspection (typically $300 to $500), appraisal (often $400 to $600), and earnest money deposit (usually 1% to 3% of the purchase price, held in escrow and credited toward your down payment at closing).

How to calculate your down payment for a specific price

Multiply the purchase price by 0.035. If you're looking at a $275,000 house, the math is $275,000 × 0.035 = $9,625. If you're considering a $350,000 house, it's $350,000 × 0.035 = $12,250.

Use this same method to estimate what you'd need at other percentages. For 5% down, multiply by 0.05. For 10% down, multiply by 0.10. For 20% down, multiply by 0.20. This helps you understand the trade-off: each percentage point you add to your down payment reduces your monthly mortgage insurance and lowers your interest rate.

Why lenders charge more for smaller down payments

A 3.5% down payment means you're borrowing 96.5% of the home's value. If the house loses value or you stop paying, the lender's risk is high. To offset that risk, lenders charge a higher interest rate on FHA loans than on conventional loans with 20% down.

The difference in interest rate can be 0.5% to 1% higher, depending on your credit score and the lender. On a $289,500 loan, a 0.5% rate difference costs you roughly $100 to $150 per month over 30 years. Combined with mortgage insurance, a 3.5% down payment can cost $250 to $400 more per month than a 20% down payment on the same house.

When a 3.5% down payment makes sense

A 3.5% down payment is useful if you don't have 20% saved but you have enough for the down payment, closing costs, and a small emergency fund. It lets you buy now rather than wait years to save. It also makes sense if you expect your income to rise significantly in the next few years, since you can refinance to remove mortgage insurance once you've built equity.

It makes less sense if you're stretching to afford the down payment and have no cash left for repairs, property taxes, or homeowners insurance. A house that costs $300,000 to buy costs $400 to $600 per month in taxes and insurance alone, on top of your mortgage payment. If you can't afford that, a smaller house or renting may be the better choice.

Frequently Asked Questions

Can I put down less than 3.5%?

Conventional loans typically require at least 3% down, and some lenders offer 0% down programs for military members or rural properties. FHA loans cap out at 3.5% as the minimum. VA loans (for veterans) often require 0% down. Check with your lender about what programs you may be able to use based on your situation.

Does my down payment affect my interest rate?

Yes. Lenders charge higher interest rates for lower down payments because the risk is higher. A 3.5% down FHA loan typically carries a rate 0.5% to 1% higher than a conventional loan with 20% down, all else equal. Your credit score and the lender also matter, so shop around.

Can I borrow money for my down payment?

Most lenders allow a gift from a family member but not a loan. If you borrow from a bank or credit card, the lender will see the new debt on your credit report and may deny your mortgage or raise your rate. A family gift must usually be documented in writing and the giver must confirm they don't expect repayment.

What happens to my down payment if the sale falls through?

Your earnest money deposit (typically 1% to 3% of the purchase price) is held in escrow and returned to you if the sale doesn't close, unless you back out without a valid reason. Your down payment itself isn't paid until closing. If the deal fails due to inspection or appraisal issues, you get your money back.

Can I remove mortgage insurance later?

Yes, once you've paid down the loan to 80% of the home's original value, you can request to remove FHA mortgage insurance. This typically takes 11 years of payments on a 30-year loan, though it happens faster if the home appreciates or you make extra payments. Ask your lender about the exact timeline and process.