30 Yr vs 15 Yr Mortgage Calculator
'/%3E%3Ccircle cx='48' cy='39' r='19' fill='%23f2c9a5'/%3E%3Cpath d='M27 35c3-16 39-17 42 2-8-8-27-9-42-2z' fill='%23374151'/%3E%3Cpath d='M21 86c5-24 49-28 56 0z' fill='%232563eb'/%3E%3Ccircle cx='41' cy='41' r='2' fill='%23111827'/%3E%3Ccircle cx='55' cy='41' r='2' fill='%23111827'/%3E%3Cpath d='M42 52c4 3 9 3 13 0' stroke='%2392400e' stroke-width='3' fill='none' stroke-linecap='round'/%3E%3C/svg%3E)
Reviewed by Calculator Editorial Team
When buying a home, one of the most important financial decisions you'll make is choosing between a 30-year and 15-year mortgage. Both options have different interest payment structures, total costs, and monthly payments. This guide explains the key differences and helps you decide which mortgage term is right for you.
How 30-year vs 15-year mortgages compare
Mortgage terms are typically 15 or 30 years, but some lenders offer other terms. The key differences between these two most common options are:
Note: These comparisons assume the same interest rate, loan amount, and monthly payments. Actual results may vary based on your specific financial situation.
Interest payments
With a 15-year mortgage, you'll pay more in interest over the life of the loan compared to a 30-year mortgage. This is because you're paying off the loan faster, so more of your payments go toward interest rather than principal.
Total cost
A 15-year mortgage will generally cost more in total interest payments than a 30-year mortgage. However, you'll save money on property taxes and insurance if you refinance or sell before the 15 years are up.
Monthly payments
Monthly payments for a 15-year mortgage are typically higher than for a 30-year mortgage. This is because you're paying off more principal each month, which reduces the amount of interest you owe.
Refinancing options
With a 15-year mortgage, you have more opportunities to refinance as interest rates change. This can help you save money if rates drop after you take out the loan.
Example comparison
Let's look at an example to illustrate the differences between a 30-year and 15-year mortgage:
| Term | Monthly Payment | Total Interest Paid | Total Cost |
|---|---|---|---|
| 30-year | $1,200 | $240,000 | $480,000 |
| 15-year | $1,800 | $360,000 | $600,000 |
In this example, the 30-year mortgage has lower monthly payments and total interest payments, but the 15-year mortgage has a higher monthly payment and total cost. The choice depends on your financial goals and situation.
Using the mortgage comparison calculator
Our mortgage comparison calculator helps you compare the costs of a 30-year and 15-year mortgage. Simply enter your loan amount, interest rate, and down payment, then click "Calculate" to see the results.
Tip: Use this calculator to compare different scenarios and make an informed decision about your mortgage term.
How to use the calculator
- Enter your loan amount in the "Loan Amount" field.
- Enter your interest rate in the "Interest Rate" field.
- Enter your down payment in the "Down Payment" field.
- Click the "Calculate" button to see the results.
- Review the comparison of 30-year and 15-year mortgage options.
Interpreting the results
The calculator will show you:
- The monthly payment for each mortgage term
- The total interest paid over the life of the loan
- The total cost of the mortgage (principal + interest)
- A chart comparing the two mortgage options
Use these results to help you decide which mortgage term is right for you. Remember that your actual costs may vary based on your specific financial situation.
How the mortgage comparison is calculated
The mortgage comparison calculator uses standard mortgage formulas to calculate the monthly payments and total costs for each mortgage term.
Monthly Payment Formula:
M = P [ i(1 + i)^n ] / [ (1 + i)^n - 1 ]
Where:
- M = monthly payment
- P = principal loan amount
- i = monthly interest rate (annual rate divided by 12)
- n = number of payments (loan term in years × 12)
Total Interest Paid Formula:
Total Interest = (Monthly Payment × Number of Payments) - Principal Loan Amount
Total Cost Formula:
Total Cost = Principal Loan Amount + Total Interest Paid
The calculator uses these formulas to compare the costs of a 30-year and 15-year mortgage. The results are based on the assumptions shown in the calculator.