Lesson 26 - Mortgage Basics
Mortgages turn a home purchase into a long, predictable plan. You pay a portion now, borrow the rest, and repay over years. This lesson explains key terms, payment mechanics, fixed vs. adjustable rates, and how to compare offers without guesswork.
What a mortgage is
A mortgage is a loan secured by real estate. The home acts as collateral. Your monthly payment usually includes principal, interest, property taxes, and insurance (PITI). If you default, the lender can take the property through foreclosure.
Three factors define cost: loan amount, interest rate, and term. Lower rates or shorter terms reduce total interest but raise monthly payments. Longer terms lower monthly payments but increase the overall price of the home.
How payments amortize over time
Amortization means you pay interest first, principal later. Each month a bit more goes toward the loan balance, and less toward interest. The shift happens automatically as the balance declines.
What this chart shows: interest share dominates early payments and falls over time, while principal share grows.
Example comparison of mortgage options
The Table below compares three common loan setups for a €200,000 home with a €40,000 down payment (loan €160,000). It shows how term and rate shape cost.
What this table shows: short terms have higher monthly payments but much lower total interest. Longer terms feel affordable month to month but cost more overall.
Fixed vs. adjustable
- Fixed-rate mortgage: same rate for the whole term. Predictable and steady.
- Adjustable-rate mortgage (ARM): lower starting rate that adjusts later. Cheaper short-term, riskier long-term.
Mini story – Lina’s decision
Lina, 28, wanted to buy a €200,000 apartment. She saved €40,000 and needed a €160,000 mortgage. Bank A offered a 30-year fixed loan at 5 %. Bank B offered a 5/1 ARM at 4.1 %. The ARM seemed better at first-€70 cheaper monthly-but could rise after five years. Lina calculated that a 2 % jump would raise her payment above her comfort zone. She chose the fixed-rate loan and added €100 extra to each payment. That shortened her loan by about three years and saved over €20,000 in interest. Smart borrowers don’t chase the lowest rate-they plan for stability.
Interactive mortgage estimator
Adjust the inputs to see how home price, down payment, rate, and term affect monthly cost and lifetime interest.
What this tool shows: raising the down payment or shortening the term cuts lifetime cost. Even small changes in rate have large effects over decades.
Quick recap
- A mortgage is a long-term secured loan for property.
- Amortization front-loads interest; early extra payments save big.
- Fixed = stability, adjustable = flexibility + risk.
- Compare total cost, not just the monthly number.
Key Terms
Further Learning
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