What You'll Pay Each Month on a $300,000 Mortgage

The monthly payment on a $300,000 mortgage ranges from about $1,432 to $2,108, depending on your interest rate and loan term

The exact number depends on three things: how much you borrowed, what interest rate you locked in, and whether you chose a 15-year or 30-year loan. A $300,000 mortgage at 6.5% interest over 30 years costs roughly $1,896 per month in principal and interest alone. At 5% over 30 years, it drops to about $1,610. Over 15 years at 6.5%, the same loan jumps to roughly $2,472 per month.

These figures cover only the loan payment itself. Your actual monthly housing bill will be higher because it includes property taxes, homeowners insurance, and possibly mortgage insurance or HOA fees. Many lenders bundle these into a single payment called PITI (principal, interest, taxes, insurance). Understanding what sits inside that payment helps you budget accurately and spot errors on your statement.

Key Takeaways

• A $300,000 mortgage at 6.5% interest costs about $1,896 per month over 30 years, or $2,472 over 15 years, in principal and interest only.
• Your actual monthly payment will be higher because it includes property taxes, homeowners insurance, and possibly private mortgage insurance (PMI) if your down payment was less than 20%.
• A 1% change in interest rate shifts your monthly payment by roughly $250 to $300 on a 30-year loan.
• You can use an online mortgage calculator to plug in your specific rate, term, and location to see your exact payment, including taxes and insurance.

How interest rate changes affect your monthly payment

Interest rates move constantly, and even a small shift changes what you pay each month. On a $300,000 mortgage over 30 years, each 1% increase in rate adds roughly $250 to $300 to your monthly payment. A loan at 5% costs about $1,610 per month; at 6% it costs about $1,799; at 7% it costs about $1,996.

This is why the rate you lock in matters so much. If you are shopping for a mortgage, getting your rate down by even 0.5% saves you $125 to $150 every month for 30 years. Over the life of the loan, that small difference adds up to tens of thousands of dollars.

The difference between a 15-year and 30-year loan

A shorter loan term means a higher monthly payment but far less interest paid overall. On a $300,000 mortgage at 6.5%, a 30-year loan costs $1,896 per month and totals about $682,512 in payments. A 15-year loan at the same rate costs $2,472 per month but totals only about $445,000 in payments—a savings of over $237,000 in interest.

The trade-off is real: the 15-year payment is 30% higher each month. Most people choose the 30-year loan because it leaves more room in their monthly budget for other expenses. Some people make extra payments toward principal when they can, which shortens the loan without locking them into the higher monthly obligation.

What gets added to your principal and interest payment

Your lender will likely collect property taxes and homeowners insurance along with your mortgage payment, holding the money in an escrow account and paying those bills on your behalf. If you put down less than 20%, you will also pay private mortgage insurance (PMI), which protects the lender if you default. PMI typically costs 0.5% to 1.5% of the loan amount per year, added to your monthly bill.

On a $300,000 mortgage with 10% down, PMI might add $125 to $375 per month. Property taxes vary widely by location—a home in a high-tax county might add $300 to $600 per month, while a low-tax area might add $100 to $200. Homeowners insurance usually runs $100 to $200 per month depending on the home's value and your location. Together, these can easily add $500 to $1,000 to your principal-and-interest payment.

How to calculate your exact payment

An online mortgage calculator lets you enter your loan amount, interest rate, and term to see your principal-and-interest payment instantly. Most calculators also have fields for property tax rate (or annual tax amount), insurance cost, and PMI, so you can see your full monthly payment all at once. You will need to know or estimate your interest rate, your down payment amount, and your local property tax rate.

If you do not know your property tax rate, search "[your county] property tax rate" or call your county assessor's office. For insurance, get quotes from at least two insurers. For PMI, ask your lender what rate applies to your down payment percentage. Plugging in real numbers gives you a far more accurate picture than a generic estimate.

What happens if you pay extra toward principal

Any payment above your required monthly amount goes directly toward principal, shortening your loan and cutting the total interest you pay. On a $300,000 mortgage at 6.5% over 30 years, adding just $200 per month to principal cuts roughly 4 years off the loan and saves about $80,000 in interest. Adding $500 per month cuts about 8 years off and saves roughly $160,000.

Before you start making extra payments, confirm with your lender that there is no prepayment penalty—a fee charged for paying off the loan early. Most mortgages do not have this, but some do, especially if you locked in a very low rate. Once you know you are clear, extra payments are one of the fastest ways to build equity and reduce the total cost of your home.

How your down payment size affects the monthly cost

A larger down payment lowers your loan amount and eliminates PMI, both of which reduce your monthly payment. If you put down 20% on a $300,000 home ($60,000), you borrow $240,000 instead of $300,000. At 6.5% over 30 years, that $240,000 loan costs about $1,517 per month instead of $1,896—a difference of $379 per month.

You also avoid PMI entirely, which saves another $125 to $375 per month depending on the loan size. The downside is that a larger down payment ties up cash you might use for emergencies or other investments. Many people choose to put down 10% to 15% and accept PMI for a few years, then refinance once they have built enough equity to drop it.

Frequently Asked Questions

Can I pay off my mortgage faster without refinancing?

Yes. Any extra payment you make goes toward principal and shortens your loan. You do not need to refinance; just send extra money with your regular payment and ask your lender to apply it to principal. Confirm there is no prepayment penalty first.

What if interest rates drop after I lock in my rate?

You can refinance your mortgage to a lower rate, which lowers your monthly payment. Refinancing costs money (typically $2,000 to $5,000 in fees), so it only makes sense if the rate drop is large enough to recoup those costs within a few years. A mortgage calculator can show you the break-even point.

Does my credit score affect my monthly payment?

Your credit score does not change the payment calculation itself, but it affects the interest rate you are offered. A higher credit score usually qualifies you for a lower rate, which lowers your monthly payment. The difference between a 620 score and a 760 score can be 1% to 2% in interest rate.

What if I want to know my payment before I have a rate locked in?

Use the current average mortgage rate for your area as a placeholder. Search "current mortgage rates" to find today's rates, then plug that into a calculator. Your actual rate may be higher or lower depending on your credit, down payment, and the lender you choose.

Is PMI ever removed automatically?

Yes, but only after you reach 20% equity in the home. On a $300,000 purchase, that means your loan balance must drop to $240,000. Depending on your down payment and how fast you pay, this can take 5 to 10 years. Some lenders remove it automatically; others require you to request it in writing once you hit that threshold.