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Expose the hidden mechanics of your mortgage. See exactly how every single payment is split between destroying principal and paying bank interest. This free online tool allows you to calculate loan amortization schedules quickly and accurately. No sign-up or installation required.
When you take out a massive 30-year mortgage to buy a home, the bank agrees to let you pay it back in 360 perfectly equal monthly installments. While the total payment amount never changes, what happens inside that payment is a brutal mathematical calculation known as an Amortization Schedule.
Most new homeowners are horrified to discover that for the first 10 years of their mortgage, they are barely paying off the actual house. The bank intentionally structures the amortization math so that they collect the vast majority of their profit (Interest) upfront. Our calculator pulls back the curtain, allowing you to see the exact split of every single payment for the next 30 years.
Every time you write a check to the bank, the money is instantly cleaved into two distinct buckets:
This is pure profit for the bank. It is the fee they charge you for borrowing their money. In the early years of a mortgage, up to 70% or 80% of your monthly payment goes straight into this bucket. You get absolutely zero equity in your home for this money.
This is the money that actually pays down the core debt and builds your Net Worth (Equity). In Month 1 of a 30-year mortgage, only a tiny sliver of your payment touches the principal. As the years pass, this bucket slowly grows larger as the interest bucket shrinks.
Because the amortization curve is heavily front-loaded with interest, any extra money you pay toward the Principal in the early years has an exponentially massive impact on the life of the loan.
If you simply make one single extra mortgage payment a year (e.g., paying bi-weekly instead of monthly), you can mathematically shatter a 30-year mortgage and pay it off in just 25 or 26 years. You will effortlessly save tens of thousands of dollars in pure interest that would have otherwise gone to the bank.
Expert clarification on 15-year vs 30-year loans, ARMs, and early payoff penalties.