Your monthly payment depends on three things: the interest rate, the loan term, and how much you put down
A $350,000 mortgage does not have one payment. The same loan amount produces different monthly costs depending on the interest rate your lender offers you, how many years you take to repay it, and whether you are borrowing the full $350,000 or putting money down first. On a 30-year loan at 7% interest, you would pay roughly $2,330 per month in principal and interest alone. At 6%, that same loan drops to about $2,098 per month. At 8%, it rises to $2,611. The difference between a 6% and 8% rate is nearly $500 a month—$6,000 a year.
Your actual payment will also include property taxes, homeowners insurance, and possibly mortgage insurance, depending on your down payment. These costs vary by location and property value, so the total you owe each month will be higher than the principal-and-interest figure alone.
Key Takeaways
- A $350,000 mortgage at 7% interest over 30 years costs approximately $2,330 per month in principal and interest, but this changes with interest rate and loan length.
- A 1% difference in interest rate changes your monthly payment by $200 to $300, so shopping for rates across multiple lenders matters.
- Your full monthly payment includes property taxes, homeowners insurance, and possibly private mortgage insurance (PMI) if your down payment is less than 20%.
- Shortening the loan term from 30 years to 15 years roughly increases your monthly payment by 40% but cuts total interest paid nearly in half.
How interest rate moves your payment up and down
Interest rates are the single biggest lever on your monthly cost. The rate you receive depends on market conditions, your credit score, your down payment size, and the lender you choose. Even a difference of 0.5% can shift your payment by $100 to $150 per month.
If you lock in a rate of 6.5% instead of 7%, you save roughly $115 per month on a $350,000 loan over 30 years. Over the life of the loan, that is $41,400 in interest you do not pay. Conversely, if rates rise to 7.5%, your payment climbs to about $2,447 per month—$117 more than at 7%. This is why getting pre-approved and comparing offers from at least three lenders is standard practice. The difference between the best and worst rate you might be offered can easily exceed 1%, which translates to hundreds of dollars per month.
Loan term: 30 years versus 15 years versus other lengths
A 30-year mortgage spreads the repayment over the longest period, which lowers your monthly payment but means you pay far more interest overall. A 15-year mortgage cuts the repayment period in half, which raises your monthly payment but cuts total interest paid by roughly 40% to 50%.
On a $350,000 loan at 7% interest, a 30-year term costs $2,330 per month. A 15-year term at the same rate costs approximately $3,286 per month—$956 more each month. Over 15 years, you pay roughly $591,480 in total (principal plus interest). Over 30 years, you pay roughly $838,800. The 15-year loan costs you $247,320 less in total interest, but only if you can afford the higher monthly payment.
Some borrowers choose a 20-year term as a middle ground, or they take a 30-year loan and make extra principal payments when cash flow allows. The key is understanding that every year you shorten the term, your monthly payment rises but your total interest falls.
Down payment size and private mortgage insurance
The amount you put down affects whether you pay private mortgage insurance (PMI). If you put down less than 20% of the home price, lenders require PMI to protect themselves if you default. PMI typically costs 0.5% to 1.5% of the loan amount per year, added to your monthly payment.
On a $350,000 loan, if you put down 10% ($35,000) and borrow $315,000, PMI might add $130 to $400 per month depending on the lender and your credit score. If you put down 20% ($70,000) and borrow $280,000, you avoid PMI entirely. The trade-off is immediate: you have less cash on hand after closing, but your monthly payment is lower and stays lower for the life of the loan. PMI drops off automatically once your loan balance falls to 80% of the original home value, but that can take years.
Property taxes and insurance are not part of the base payment
The figures above cover only principal and interest. Your actual monthly bill from the lender usually includes property taxes and homeowners insurance as well, collected in an account called an escrow or impound account. Property taxes vary dramatically by location—a home worth $350,000 might carry annual taxes of $3,000 in one county and $8,000 in another. Homeowners insurance typically runs $1,000 to $2,000 per year for a home at this price point, though it varies by location, age of the home, and the insurer.
If your lender requires PMI, that gets added to the escrow payment too. So your total monthly housing payment might be $2,330 (principal and interest) plus $400 (property taxes and insurance) plus $200 (PMI), totaling $2,930. That is why lenders ask about your total monthly debt and income—they want to know if you can handle the full payment, not just the mortgage portion.
How to estimate your own payment
Use a mortgage calculator and plug in three numbers: the loan amount (the price minus your down payment), the interest rate, and the loan term in years. Most lenders and financial websites offer free calculators. Enter $315,000 (if you put 10% down on a $350,000 home), 7%, and 30 years, and you will see the principal-and-interest payment. Then add estimates for property taxes (your real estate agent or county assessor can tell you the rate) and insurance (call an insurance agent for a quote).
The result is close to what you will actually owe each month. It will not be exact—property taxes and insurance change year to year, and if you have PMI, the amount drops as your loan balance shrinks—but it gives you a realistic picture of the cost before you make an offer.
Shopping for rates and terms across lenders
Your interest rate is not set in stone. Banks, credit unions, mortgage brokers, and online lenders all compete for your business, and their rates differ. A difference of 0.25% to 0.5% is common between lenders on the same day. Getting pre-approved by at least three lenders lets you compare not just the rate but also the fees, the customer service reputation, and the speed of closing.
Some lenders charge higher rates but lower fees; others do the opposite. Some offer rate locks that last 30 days, others 60 days. If you are in a competitive market and need to move fast, a lender with a longer lock and faster closing might be worth a slightly higher rate. If you have time, shopping around can save you tens of thousands of dollars over the life of the loan.
Frequently Asked Questions
What is the monthly payment on a $350,000 mortgage at 6%?
At 6% interest over 30 years, the principal-and-interest payment is approximately $2,098 per month. Add property taxes, insurance, and any PMI, and your total monthly payment will be higher. The exact amount depends on your location and down payment size.
Does a bigger down payment lower the monthly payment?
Yes. A larger down payment means you borrow less money, so your monthly payment is lower. It also eliminates PMI if you put down 20% or more. The trade-off is having less cash available after closing.
Can I pay off a 30-year mortgage in 15 years?
Yes. You can take out a 30-year loan and make extra principal payments whenever you have the cash, which shortens the payoff timeline. However, a 15-year loan from the start usually carries a slightly lower interest rate, so compare both options before deciding.
What happens to my payment if interest rates drop after I lock in?
If you have already locked in a rate and rates drop, you cannot lower your rate unless you refinance—which means taking out a new loan, paying closing costs again, and restarting the clock. Refinancing makes sense only if rates drop enough to offset the fees, usually at least 0.5% to 1%.
How much of my payment goes to principal versus interest?
Early in the loan, most of your payment goes to interest. On a $350,000 loan at 7% over 30 years, your first payment is roughly $810 in interest and $1,520 in principal. As years pass, the ratio flips—by year 25, most of your payment goes to principal. This is why paying extra principal early saves the most interest.