Fixed-Rate vs. Adjustable-Rate Mortgages (ARM)
A Fixed-Rate Mortgage (FRM) locks in your interest rate and principal payment for the entire 15 or 30-year term, offering total protection against market interest rate increases.
An Adjustable-Rate Mortgage (ARM) offers a lower initial teaser rate for a fixed intro period (e.g. 5 or 7 years), after which the rate adjusts annually based on prevailing benchmark indices (such as SOFR). ARMs can save money for short home ownership horizons but carry interest rate reset risks.
Mortgage Rate Simulator
Estimate monthly principal & interest payments for any rate.
Monthly Payment: $2,212.24
Total Interest Paid: $446,407.20
Interest Share of Total: 56.1%
Mortgage Amortization: Front-Loaded Interest Mechanics
Amortization dictates how monthly mortgage payments are allocated between interest charges and principal payoff over a 30-year schedule.
During the first 10 to 15 years of a 30-year mortgage, upwards of 70% of each monthly payment covers interest costs. Making extra principal payments early in the loan term dramatically reduces total lifetime interest and shaves years off the payoff timeline.
Amortization Interest Calculator
See how interest share changes between 15 and 30 year terms.
Monthly Payment: $2,398.20
Total Interest Paid: $463,352.00
Interest Share of Total: 53.7%
When Does Debt Refinancing Make Financial Sense?
Refinancing replaces an existing loan with a new loan featuring updated interest terms, loan lengths, or monthly payment amounts.
To determine if a refinance is worthwhile, calculate the Breakeven Horizon: divide closing costs and origination fees by your monthly payment savings. If you plan to remain in the property past the breakeven month, refinancing generates net positive financial value.
Refinance Breakeven Calculator
Calculate exact months needed to recover closing costs.
Breakeven Horizon: 20 Months
Time in Years: 1.7 Years
5-Year Net Profit: $8,000.00
