What a $600,000 Mortgage Actually Costs Each Month
Your monthly payment on a $600,000 mortgage is roughly $3,600 to $4,800, 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 $600,000 mortgage at 7% interest over 30 years costs about $3,996 per month in principal and interest alone. At 6%, that same loan drops to $3,583. At 8%, it climbs to $4,440. The difference between a 6% and 8% rate is $857 a month—over $300,000 across the life of the loan.
But principal and interest are only part of what you actually pay. Your monthly bill also includes property taxes, homeowners insurance, and possibly mortgage insurance (PMI), depending on your down payment. These costs vary wildly by location and your personal situation. A $600,000 home in a high-tax county can add $800 to $1,500 a month just for property taxes. Insurance might add another $150 to $300. If you put down less than 20%, PMI could add $200 to $400 more. Your real monthly housing cost could easily be $5,500 to $6,500 or higher.
Key Takeaways
- Principal and interest on a $600,000 mortgage at 7% over 30 years is about $3,996 per month; at 6% it is $3,583; at 8% it is $4,440.
- Property taxes, homeowners insurance, and PMI (if your down payment was less than 20%) are added on top of principal and interest and often total $1,000 to $2,000 per month.
- Your actual monthly payment depends on your interest rate, loan term, location, home value, and down payment amount—use a mortgage calculator with your own numbers to see your real cost.
- Lenders typically want your total housing payment (including taxes, insurance, and PMI) to be no more than 28% of your gross monthly income.
How interest rate and loan term change your payment
The interest rate you receive depends on market conditions, your credit score, and the type of loan you choose. A 30-year fixed-rate mortgage is the most common: you pay the same amount every month for 30 years. A 15-year mortgage costs more per month but you pay far less interest overall because you are paying down the loan faster. On a $600,000 loan at 7%, a 15-year mortgage costs about $5,592 per month—$1,596 more than the 30-year option—but you save roughly $400,000 in total interest paid.
Your rate also depends on whether you lock it in when you apply or whether you float it until closing. Locking in protects you if rates rise before closing; floating means you get the rate that exists on closing day. If rates drop, floating saves you money. If they rise, it costs you. Most people lock in because the certainty is worth the risk.
What property taxes and insurance add to your bill
Property taxes are set by your county or municipality and are based on your home's assessed value. They vary enormously by location. In some areas, property tax on a $600,000 home is $3,000 a year ($250 a month). In others, it is $15,000 a year ($1,250 a month) or more. You can find your local rate by searching "[your county] property tax rate" or calling your county assessor's office. Your lender will estimate this cost and include it in your monthly payment.
Homeowners insurance protects the structure of your home and your belongings. The cost depends on the home's age, location, construction type, and your claims history. A $600,000 home typically costs $1,500 to $3,600 per year to insure, or $125 to $300 per month. Homes in flood zones, wildfire zones, or areas with high theft cost more. Your lender requires you to carry insurance and will include it in your monthly payment.
Mortgage insurance (PMI) when you put down less than 20%
If your down payment is less than 20% of the home's purchase price, your lender requires you to pay private mortgage insurance (PMI). This protects the lender if you stop paying; it does not protect you. On a $600,000 home with a 10% down payment ($60,000), you are borrowing $540,000. PMI typically costs 0.5% to 1.5% of the loan amount per year, depending on your credit score and down payment percentage. That is $2,700 to $8,100 per year, or $225 to $675 per month.
PMI is not permanent. Once you have paid down the loan to 80% of the home's original purchase price, you can request to have it removed. If the home's value rises, you may reach that threshold faster. Some loans allow automatic removal once you hit 78% of the original loan-to-value ratio. Ask your lender about the removal process when you close.
How much income you need to afford this mortgage
Lenders use a debt-to-income ratio to decide how much they will lend you. Most want your total monthly housing payment (principal, interest, taxes, insurance, and PMI) to be no more than 28% of your gross monthly income. If your housing payment is $5,000 per month, you need a gross monthly income of at least $17,857 (or about $214,000 per year). Some lenders will go as high as 43% of gross income if your other debts are low, but 28% is the standard.
This is a lender's rule, not a law. You can afford less or more depending on your other expenses, savings, and financial goals. But if a lender says no, it is usually because the payment is too large relative to your income. If you are close, paying down other debts (car loans, credit cards, student loans) before you apply can improve your ratio.
Using a mortgage calculator to find your actual payment
The numbers above are examples. Your actual payment depends on your specific loan amount, interest rate, term, location, and down payment. Use an online mortgage calculator to plug in your own numbers. You will need:
- Loan amount (home price minus down payment)
- Interest rate (ask your lender or check current rates online)
- Loan term (15 years, 30 years, or other)
- Property tax rate for your county
- Estimated homeowners insurance cost
- Down payment percentage (to calculate PMI, if needed)
Most calculators will show you the breakdown: principal and interest, property taxes, insurance, and PMI separately. This helps you see where your money actually goes. If the total is higher than you expected, you can adjust the loan amount or down payment and recalculate.
What happens if rates or taxes change after you close
If you have a fixed-rate mortgage, your principal and interest payment never changes. Property taxes and insurance can change, though. Property taxes usually rise a small amount each year; some counties reassess homes every few years and the tax can jump. Homeowners insurance can increase if you file claims or if your insurer raises rates in your area. Budget for these increases when you plan your housing costs.
If you have an adjustable-rate mortgage (ARM), your interest rate can change after an initial fixed period. This is rare for 30-year mortgages but common for shorter terms. If your rate adjusts upward, your payment rises. ARMs are riskier because you cannot predict your future payment. Most people choose fixed-rate mortgages to avoid this uncertainty.
Frequently Asked Questions
Can I pay off my mortgage early without a penalty?
Most mortgages allow you to pay extra toward principal at any time without penalty. Paying extra reduces the total interest you pay and shortens the loan term. Some older mortgages have prepayment penalties, so check your loan documents or ask your lender before you start making extra payments.
What is the difference between a fixed-rate and adjustable-rate mortgage?
A fixed-rate mortgage keeps the same interest rate for the entire loan term, so your principal and interest payment never changes. An adjustable-rate mortgage (ARM) has a fixed rate for a set period (often 3, 5, 7, or 10 years), then the rate adjusts annually based on market conditions. ARMs usually start with a lower rate but can become much more expensive if rates rise.
What if I can only afford the principal and interest, not taxes and insurance?
You cannot avoid property taxes and insurance. Lenders require insurance and will force-place it (at a higher cost) if you do not buy it yourself. Property taxes are a legal obligation. If you cannot afford the full monthly payment including these costs, the home is beyond your budget. Consider a less expensive property or increase your down payment to lower the loan amount.
Does my credit score affect my mortgage payment?
Your credit score affects the interest rate you receive, not the payment calculation itself. A higher credit score usually means a lower interest rate. The difference between a 620 credit score and a 760 credit score can be 1% to 2% in interest rate, which translates to hundreds of dollars per month on a $600,000 loan. Improving your credit before you apply can save you significant money.
What if property values drop after I buy?
Your monthly payment does not change if your home's value drops. You still owe the full loan amount. However, if you need to sell, you may owe more than the home is worth (being "underwater"). This is why a larger down payment protects you: if you put down 20% and the home drops 10% in value, you still have equity.