Your monthly payment depends on three things: the interest rate, the loan length, and whether you have an adjustable or fixed rate
On a $240,000 mortgage, your monthly payment (the part that goes toward principal and interest, not taxes or insurance) typically ranges from about $1,150 to $1,600 per month. The exact number depends on your interest rate and how many years you take to repay the loan. A lower interest rate or a longer loan term brings the monthly payment down; a higher rate or shorter term brings it up.
This article shows you how to estimate your own payment using real numbers, and explains what happens when you add property taxes, homeowners insurance, and mortgage insurance into the picture. The total you actually pay each month is usually higher than the principal-and-interest number alone.
Key Takeaways
- A $240,000 mortgage at 6.5% interest over 30 years costs roughly $1,520 per month in principal and interest alone.
- The same loan at 5% interest costs roughly $1,288 per month — showing how even small rate changes shift your payment by hundreds of dollars.
- Shortening the loan to 15 years roughly doubles your monthly payment but cuts the total interest you pay nearly in half.
- Your actual monthly payment includes property taxes, homeowners insurance, and possibly mortgage insurance, which can add $300 to $600 or more depending on your location and down payment.
- You can estimate your payment using an online mortgage calculator, but the real number comes from your lender once you have a rate locked in.
How interest rate changes affect your payment
Interest rate is the single biggest lever on your monthly payment. The table below shows what principal-and-interest payments look like on a $240,000 loan over 30 years at different rates. These are estimates — your actual payment may differ slightly based on how your lender calculates.
| Interest Rate | Monthly Payment (P&I only) | Total Interest Paid Over 30 Years |
|---|---|---|
| 4.5% | ~$1,216 | ~$197,760 |
| 5.0% | ~$1,288 | ~$223,632 |
| 5.5% | ~$1,363 | ~$250,680 |
| 6.0% | ~$1,439 | ~$278,640 |
| 6.5% | ~$1,520 | ~$307,200 |
| 7.0% | ~$1,598 | ~$335,280 |
Notice that a 1% difference in rate changes your monthly payment by roughly $80 to $90. Over the life of the loan, that small monthly difference adds up to tens of thousands of dollars in total interest. This is why shopping for the best rate matters — even a 0.25% difference is worth pursuing.
What happens when you choose a 15-year loan instead of 30 years
A 15-year mortgage means you pay off the loan in half the time, which sounds expensive — and it is, month to month. But you pay far less interest overall because the loan is shorter.
On a $240,000 loan at 6.0% interest, a 30-year payment is roughly $1,439 per month. The same loan at 6.0% over 15 years costs roughly $1,899 per month — about $460 more each month. But over 15 years, you pay only about $101,820 in total interest, compared to $278,640 over 30 years. You save nearly $177,000 in interest by choosing the shorter term, if you can afford the higher monthly payment.
The tradeoff is real: a 15-year mortgage leaves you less money each month for other expenses or savings. A 30-year mortgage costs more in interest but gives you breathing room in your monthly budget. Neither choice is wrong — it depends on your income, other debts, and how much monthly flexibility you need.
Adding property taxes, insurance, and mortgage insurance to your payment
The principal-and-interest number is only part of what you pay each month. Most lenders bundle property taxes, homeowners insurance, and (if your down payment was less than 20%) mortgage insurance into a single monthly payment called PITI (Principal, Interest, Taxes, Insurance) or sometimes PITI-MI when mortgage insurance is included.
Property taxes vary dramatically by location — a home in one county might have annual taxes of $2,400 while the same home in another state costs $6,000 or more per year. Homeowners insurance typically ranges from $800 to $2,000 per year depending on the home's value, location, and your coverage choices. Mortgage insurance (also called PMI) usually costs 0.5% to 1.5% of the loan amount per year if you put down less than 20%.
On a $240,000 mortgage, these additions could easily add $300 to $600 per month to your principal-and-interest payment. In a high-tax area with a smaller down payment, the total could be even higher. This is why lenders ask about your income — they want to make sure your total housing payment (PITI or PITI-MI) does not exceed about 28% to 31% of your gross monthly income.
How to estimate your payment before you talk to a lender
An online mortgage calculator lets you plug in the loan amount ($240,000), an estimated interest rate, and the loan term (15 or 30 years) to see a rough monthly payment. Most calculators show principal and interest only, so remember to add an estimate for taxes and insurance afterward.
To estimate property taxes, search "[your county] property tax rate" — most counties publish this as a percentage of home value. To estimate insurance, call a local homeowners insurance agent and ask for a quote on a home in your price range. For mortgage insurance, assume 0.75% to 1% of the loan amount per year if your down payment is less than 20%.
These estimates are useful for deciding whether a $240,000 home fits your budget, but they are not your actual payment. Your real payment comes from your lender once you have a rate locked in and have provided details about the specific property, your down payment amount, and your location.
Why your actual payment might differ from the estimate
Lenders calculate payments using slightly different methods, and some round differently than others. A payment that looks like $1,520 in a calculator might be $1,519 or $1,521 from your actual lender — the difference is small but real.
More importantly, your lender may offer different loan products: some loans have a fixed rate for the entire 30 years, while others (called adjustable-rate mortgages or ARMs) have a lower rate for the first few years, then adjust up or down based on market conditions. An ARM might start at 5.5% for the first five years, then adjust every year after that. Your initial payment would be lower, but it could rise significantly later.
The only way to know your exact payment is to get a formal quote from a lender. Most lenders provide this for free, and you are not obligated to accept their offer just because you asked.
Frequently Asked Questions
Does a bigger 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 is lower. It also means you may avoid mortgage insurance altogether if your down payment reaches 20%, which removes that cost from your monthly bill.
What if interest rates drop after I lock in my rate?
You are stuck with your locked rate unless you refinance — which means taking out a new loan to pay off the old one. Refinancing has closing costs (usually 2% to 5% of the loan amount), so it only makes sense if rates drop enough to offset those costs over the time you plan to stay in the home.
Can I pay extra toward principal each month to pay off the loan faster?
Yes, and most lenders allow this without penalty. Paying an extra $100 or $200 per month toward principal shortens your loan and saves you interest, though it does not lower your required monthly payment — you are straightforward paying down the balance faster.
What does it mean if my debt-to-income ratio is too high?
Lenders want your total monthly debt payments (mortgage, car loans, credit cards, student loans) to stay below about 43% to 50% of your gross monthly income. If a $240,000 mortgage would push you over that limit, you may need to look at a smaller loan amount or increase your income before a lender will approve you.