How Amortization Works
Amortization is the process of paying off a debt over time with regular payments. While your payment stays the same each month, the split between Principal (what you owe) and Interest (profit for bank) changes drastically.
The Front-Loaded Interest Trap
At the beginning of a 30-year mortgage, nearly 70-80% of your payment goes to Interest. You barely touch the Principal balance.
- Year 1: $1,000 Payment -> $800 Interest, $200 Principal.
- Year 20: $1,000 Payment -> $400 Interest, $600 Principal.
- Year 29: $1,000 Payment -> $50 Interest, $950 Principal.
This is why refinancing after 5 years is expensive—you just restart the clock and go back to paying mostly interest.
Accelerated Bi-Weekly Payments
Instead of paying monthly (12 payments/year), pay half your monthly amount every 2 weeks (26 half-payments = 13 full payments).
- You make one extra full payment per year effortlessly.
- This shaves 4-5 years off a 30-year mortgage and saves tens of thousands in interest.
Principal Only Payments
Any extra money you send should be marked for "Principal Only".
- Adding just $100/month extra can cut 5 years off your term.
- The earlier you pay extra, the more interest you save (Compound Savings).
Mortgage Recasting
Recasting is different from refinancing. If you inherit $50,000 and pay down your mortgage, your monthly payment stays the same (you just finish early).
If you want lower payments, you ask the lender to Recast the loan. They take the new lower balance and spread it over the *remaining* months. The rate stays the same. Usually costs a small fee ($250).
The Power of Bi-Weekly Payments
Let's do the math on a $200k loan at 5%:
- Monthly: $1,073/mo. Total Interest: $186k. Payoff: 30 Years.
- Bi-Weekly: $536 every 2 weeks. Total Interest: $152k. Payoff: 25 Years.
- Savings: $34,000 and 5 years, just by splitting the payment.
FAQs
- Can I ask for a new schedule?
- Yes. If you make a large lump-sum payment (Recast), the lender can re-calculate your schedule to lower your monthly payments while keeping the same end date.
- Is simple interest different?
- Yes. Most car loans are simple interest (calculated daily on balance). Mortgages are amortized compound interest structures.
- What is negative amortization?
- This happens when your payment is SO low it doesn't even cover the interest. The unpaid interest gets added to the principal, so your debt GROWS every month. Avoid these loans at all costs.
- Are there limits on extra payments?
- Maybe. Some mortgages only allow you to prepay 20% of the balance each year without penalty. Check your contract for "Prepayment Privilege" clauses.