Your monthly payment on a $300,000 mortgage is typically $1,432 to $1,799, depending on the interest rate and loan term

The exact amount depends on three things: your interest rate, how many years you're borrowing over, and whether you're putting down money upfront. A 30-year loan at 6.5% interest costs about $1,896 per month in principal and interest alone. The same loan at 7.5% costs $2,098. A 15-year loan at 6.5% jumps to $2,896 per month because you're paying it back faster.

That principal-and-interest number is only part of what you'll actually pay. Your monthly bill also includes property taxes, homeowners insurance, and possibly mortgage insurance — which can add $400 to $800 or more depending on where the house is and how much you put down. If you're borrowing the full $300,000 with no down payment, you'll also pay private mortgage insurance (PMI), which protects the lender if you stop paying. That typically runs 0.5% to 1% of the loan amount per year, added to your monthly bill.

Key Takeaways

  • A $300,000 loan at 6.5% over 30 years costs $1,896 monthly in principal and interest; at 7.5% it costs $2,098.
  • Your actual monthly payment includes taxes, insurance, and possibly PMI, which can total $400 to $800 extra per month.
  • Putting down 20% ($60,000) eliminates PMI and lowers your loan amount to $240,000, reducing your monthly cost by roughly $300.
  • A 15-year loan costs significantly more per month but you pay far less interest over the life of the loan.
  • Your lender will not approve the loan if your monthly housing payment exceeds 28% to 31% of your gross monthly income.

How interest rate changes affect your monthly payment

Interest rates move constantly, and even a small shift changes what you pay every month for 15 or 30 years. The difference between 6% and 7% on a $300,000 loan over 30 years is about $200 per month — $1,799 versus $1,996. Over the life of the loan, that $200 difference adds up to $72,000 in extra interest.

Your rate depends on the type of loan (conventional, FHA, VA, USDA), your credit score, how much you put down, and the current market. Lenders typically offer a range of rates, and you can often pay points — an upfront fee — to lock in a lower rate. One point costs 1% of the loan amount ($3,000 on a $300,000 loan) and usually lowers your rate by 0.25%. Whether that trade-off makes sense depends on how long you plan to stay in the house.

What happens when you put money down

A down payment shrinks the amount you borrow, which lowers your monthly payment directly. If you put down $60,000 (20%), you're borrowing $240,000 instead of $300,000. At 6.5% over 30 years, that drops your principal-and-interest payment from $1,896 to $1,517 — a savings of $379 per month.

Putting down 20% also eliminates PMI entirely. Without PMI, you save another $125 to $250 per month on a $300,000 loan, depending on your credit and the lender. Together, a 20% down payment can cut your total monthly housing cost by $500 to $600 compared to borrowing the full amount with no money down.

If you can't put down 20%, putting down even 10% or 15% still helps. You'll still pay PMI, but you're borrowing less, so your base payment and your insurance cost both drop. PMI goes away once you've paid down the loan to 80% of the home's value, either through regular payments or by building equity as the house appreciates.

The difference between 15-year and 30-year loans

A 15-year loan has a much higher monthly payment but costs far less in total interest. On a $300,000 loan at 6.5%, a 30-year mortgage costs $1,896 per month and you pay about $382,000 in interest over the life of the loan. A 15-year mortgage at the same rate costs $2,896 per month but you pay only about $121,000 in interest — a savings of $261,000.

The catch is obvious: you need to afford that higher monthly payment. A 15-year loan requires your housing payment to fit within your income, and for many buyers, $2,896 per month is simply not realistic. A 30-year loan gives you breathing room and lets you invest or save money elsewhere. If you can comfortably afford the 15-year payment, the interest savings are real. If you're stretching to make it work, the 30-year loan is the safer choice.

Some borrowers split the difference by taking a 30-year loan but paying extra toward principal each month. This lets you pay it off faster without the rigid commitment of a 15-year term, and you can pause the extra payments if your finances tighten.

Property taxes, insurance, and PMI add hundreds to your bill

Your lender requires you to pay property taxes and homeowners insurance as part of your monthly mortgage payment. These go into an escrow account, and the lender pays them on your behalf when they're due. The amount varies dramatically by location — property taxes in New Jersey or Illinois are far higher than in Texas or Florida, and insurance costs more in hurricane zones or areas with high theft.

On a $300,000 home in a moderate-tax state, property taxes might run $200 to $300 per month. Homeowners insurance typically costs $100 to $150 per month, though it can be higher for older homes or in high-risk areas. Together, that's $300 to $450 added to your principal-and-interest payment before PMI.

If you're putting down less than 20%, PMI is mandatory. On a $300,000 loan with 10% down ($30,000), PMI typically costs $150 to $250 per month. It's not optional, and it doesn't build equity — it's pure insurance for the lender. Once your loan balance drops to 80% of the home's original value (usually after 8 to 12 years of payments), you can request PMI removal, though some loan types require you to wait until you've paid for a certain amount of time.

How lenders decide if you can afford this payment

Lenders use two ratios to determine how much you can borrow. The front-end ratio (also called the housing ratio) says your monthly housing payment — principal, interest, taxes, insurance, and PMI — cannot exceed 28% of your gross monthly income. The back-end ratio says your total monthly debt payments (housing plus car loans, credit cards, student loans, and other obligations) cannot exceed 36% to 43% of gross income, depending on the lender.

If your total monthly housing payment on a $300,000 mortgage is $2,400 (including taxes, insurance, and PMI), you need a gross monthly income of at least $8,571 to meet the 28% front-end ratio. That's roughly $103,000 per year. If you have significant other debt, you may need to earn even more to pass the back-end ratio test.

These ratios are guidelines, not laws. Some lenders are stricter, some more flexible, and some offer programs for borrowers with lower credit scores or less income. But most conventional lenders stick close to these numbers because they're based on decades of data about who defaults and who doesn't.

Loan type affects your rate and what you can borrow

A conventional loan is the most common type and typically requires a credit score of 620 or higher and a down payment of at least 3% to 5%. Rates are usually lower than government-backed loans, but you'll pay PMI if you put down less than 20%.

An FHA loan allows down payments as low as 3.5% and accepts credit scores as low as 500 to 580, making it easier to may have access to. However, FHA loans require mortgage insurance for the life of the loan if you put down less than 10%, even after you've paid down the balance. This makes FHA loans more expensive over time, though the lower upfront barrier helps many first-time buyers.

A VA loan (for military members, veterans, and surviving spouses) typically requires no down payment and no PMI, which can save hundreds per month. A USDA loan (for rural properties) also requires no down payment and no PMI if you meet income limits. Both of these loans often have lower interest rates than conventional loans because the government backs them.

Frequently Asked Questions

What's the difference between the interest rate and the APR?

The interest rate is what you pay to borrow the money. The APR (annual percentage rate) includes the interest rate plus other costs like origination fees, discount points, and PMI, expressed as a yearly rate. The APR is always higher than the interest rate and gives you a more complete picture of what the loan actually costs.

Can I pay off my mortgage early without a penalty?

Most mortgages have no prepayment penalty, so you can pay extra toward principal anytime without owing a fee. Paying extra reduces the total interest you'll pay and shortens the loan term. However, check your loan documents to confirm — some older loans or certain loan types may have prepayment penalties.

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

Your payment stays the same because your rate is locked. However, you can refinance — take out a new loan at the lower rate to pay off the old one. Refinancing has closing costs (typically 2% to 5% of the loan amount), so it only makes sense if the lower rate will save you enough to cover those costs within a reasonable time.

Does my monthly payment include property taxes and insurance?

It depends on your loan type and lender. Most mortgages include taxes and insurance in an escrow account, so you pay them monthly as part of your mortgage bill. Some loans allow you to pay taxes and insurance separately, but most lenders require escrow to ensure these bills get paid on time.

What if I can't afford the monthly payment after I buy?

Contact your lender immediately — do not wait. Lenders have programs like loan modification, forbearance, and refinancing that can lower your payment or pause it temporarily. The sooner you reach out, the more options you have. Waiting until you've missed payments makes everything harder.