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$100,000 Mortgage Over 30 Years
This page shows what a $100,000 mortgage costs over 30 years. The starting rate is 6.25 percent and you can change it to match a quote you have.
The starting payment is $615.72 a month. Over 360 payments you would pay $121,658 in interest.
How the payment is worked out
Here is the formula in plain words. The payment equals the loan times the monthly rate over one minus a discount factor. The discount factor is one divided by one plus the monthly rate, multiplied out 360 times. With 6.25 percent a year the monthly rate is 0.5208 percent. The loan here is $100,000.
Worked example
For a $100,000 mortgage at 6.25 percent over 30 years the payment is $615.72. The first payment splits into $520.83 of interest and $94.88 of principal.
Total interest on this loan is $121,658. After 15 years of payments the balance has fallen to $71,810.
Questions about this calculator
What if the rate on a $100,000 mortgage over 30 years were one point higher?
The payment would rise from $615.72 to $682.18, which is $66.46 more each month. One point lower would give $552.20.
Would paying $60 extra each month shorten a $100,000 mortgage over 30 years?
Yes. On this $100,000 loan an extra $60 each month ends the loan 6 years 4 months sooner and saves $30,044 of interest.
Is 30 years the right length for a $100,000 mortgage?
It depends on the monthly payment you can carry. At 6.25 percent this term costs $615.72 a month. A 15-year term would cost $857.42 a month and $54,336 in interest, compared with $121,658 over 30 years.
Does the $615.72 payment cover property tax and insurance?
No. The $615.72 covers principal and interest only. Tax, insurance and any mortgage insurance would sit on top of it.
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This page is for education only and is not financial or tax advice.