What is the monthly payment on a $100,000 mortgage at 7% for 30 years?
Answer
$665/month
Principal & interest onlyTotal interest over 30 years: $139,509Total cost: $239,509
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How We Calculated This
M = P × [r(1+r)^n] / [(1+r)^n - 1]
P=$100,000, r=7%/12=0.5833n=360. M = $665
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Calculated using verified formulas. Last updated March 2026.