The monthly payment on a $600,000 mortgage ranges from roughly $3,600 to $5,400, depending on your interest rate and loan term

The exact number depends on three things: how much interest you're paying (your rate), how long you're borrowing for (your term), and whether you're putting down money upfront. A $600,000 loan at 7% interest over 30 years costs about $3,996 per month in principal and interest alone. At 5%, that same loan drops to $3,219. At 8%, it climbs to $4,440. If you shorten the term to 15 years, payments roughly double because you're paying back the same amount in half the time.

That monthly number is just the loan itself. Your actual payment to the lender will also include property taxes, homeowners insurance, and possibly mortgage insurance if you put down less than 20%. These additions typically add $800 to $1,500 more per month, depending on your location and down payment size. The total is what lenders call your PITI payment—principal, interest, taxes, and insurance.

Key Takeaways

  • A $600,000 mortgage at 7% interest over 30 years costs approximately $3,996 per month in principal and interest, but this varies significantly with interest rate and loan length.
  • Your actual monthly payment to the lender includes taxes, insurance, and possibly mortgage insurance, which typically adds $800 to $1,500 to the base loan payment.
  • Lowering your interest rate by even 1% saves you roughly $200 to $300 per month over the life of the loan.
  • Putting down less than 20% triggers private mortgage insurance (PMI), which adds $200 to $400 monthly until you reach 20% equity in the home.

How interest rate changes affect your monthly cost

Interest rates move constantly, and even a small shift changes what you pay every month. The difference between a 6% rate and a 7% rate on a $600,000 loan over 30 years is roughly $210 per month—$2,864 more per year. Over 30 years, that's nearly $86,000 in additional interest paid.

Your rate depends on several factors: your credit score, the size of your down payment, current market conditions, and the type of loan (conventional, FHA, VA, or USDA). Borrowers with credit scores above 740 typically get the lowest rates available that week. Those below 620 may pay 1% to 3% more. Shopping with multiple lenders for a few days can reveal rate differences of 0.25% to 0.5%, which translates to $150 to $300 monthly savings.

The difference between 15-year and 30-year loans

A 15-year mortgage on $600,000 at 7% costs roughly $5,592 per month—about $1,600 more than a 30-year loan at the same rate. You pay off the debt twice as fast, but your monthly obligation is significantly higher. The trade-off is that you pay roughly $408,000 less in total interest over the life of the loan.

A 30-year loan gives you lower monthly payments but costs more overall. You'll pay approximately $1.24 million in total interest on a $600,000 loan at 7%. With a 15-year loan at the same rate, total interest drops to about $408,000. The choice depends on whether your budget can handle the higher monthly payment and whether you'd rather keep that money flexible for other goals.

What happens when you put down less than 20%

If you put down 15% instead of 20%, you're borrowing $510,000 instead of $480,000. That extra $30,000 in borrowing costs roughly $180 per month in principal and interest. But there's a second cost: private mortgage insurance (PMI), which protects the lender if you stop paying. PMI on a $510,000 loan typically runs $200 to $400 per month, depending on your credit score and the lender.

PMI stays on your loan until you reach 20% equity in the home. On a $600,000 purchase, that means you need to pay down to $480,000 owed. Depending on your rate and how quickly home values rise, this can take 5 to 10 years. Once you hit 20% equity, you can request PMI removal by contacting your lender with proof of the home's current value.

Property taxes and insurance add hundreds more each month

Property taxes vary wildly by location. In New Jersey or Illinois, you might pay $400 to $600 monthly on a $600,000 home. In Texas or Florida, it could be $200 to $300. Some states charge almost nothing. Your lender will estimate this during the loan process, and the amount goes into an escrow account that the lender manages—they collect it from you monthly and pay the tax bill when it's due.

Homeowners insurance typically costs $100 to $200 per month for a $600,000 home, though this depends on the home's age, location, and whether it's in a flood or hurricane zone. If you're in a high-risk area, insurance can double. Like taxes, this is usually collected monthly and held in escrow. Together, taxes and insurance often add $300 to $800 to your monthly payment, sometimes more.

How to estimate your total monthly payment

Use this rough framework: start with your principal and interest (the loan payment itself), then add 30% to 40% for taxes, insurance, and PMI if applicable. On a $600,000 loan at 7% over 30 years, principal and interest is $3,996. Add 35% and you're looking at roughly $5,396 total. This is an estimate—your actual number depends on your specific rate, location, down payment, and home value.

Your lender will provide a Loan Estimate within three days of your process. This document breaks down exactly what you'll pay each month, including all taxes, insurance, and fees. It's the most accurate number you'll get before closing. Compare Loan Estimates from at least two lenders to see which offer the lowest total cost.

Frequently Asked Questions

Does a larger down payment lower my monthly payment?

Yes, in two ways. A larger down payment means you borrow less money, so your principal and interest payment drops. It also eliminates PMI if you reach 20% down, removing another $200 to $400 monthly. A 25% down payment instead of 15% typically saves $400 to $600 per month.

Can I lock in an interest rate before I'm ready to close?

Yes, lenders offer rate locks that hold your rate for 30 to 60 days (sometimes longer for a fee). This protects you if rates rise while you're shopping for a home. If rates fall, you can usually renegotiate, though some locks include a fee to lower the rate. Ask your lender what their standard lock period is.

What if I want to pay off the mortgage faster without refinancing?

You can make extra principal payments anytime without penalty on most conventional loans. Adding $200 to $300 per month to your payment can cut 5 to 10 years off a 30-year loan. Ask your lender whether extra payments go directly to principal or if there are any restrictions.

How much house can I afford with a $600,000 mortgage?

Most lenders want your total monthly housing payment (PITI plus PMI) to be no more than 28% of your gross monthly income. If your payment is $5,000, you'd need a gross income of roughly $18,000 per month, or $216,000 per year. This is a guideline, not a rule—some lenders go higher or lower.

Do adjustable-rate mortgages (ARMs) start lower than fixed rates?

Yes, ARM introductory rates are typically 0.5% to 1% lower than fixed rates for the first 3 to 7 years. After that, the rate adjusts annually or every few years based on market conditions. Your payment could rise $300 to $500 or more when the rate adjusts. ARMs are riskier if you plan to stay in the home long-term.