Loans & Mortgages
A loan is just compound interest pointed at you instead of for you. Learn to read the schedule, price the trade-offs, and never be surprised by what credit really costs.
How borrowing actually works from the customer's side — principal and interest, amortization schedules, fixed vs variable rates, APR vs APY, term trade-offs, the total cost of credit, down payment and loan-to-value, fees and closing costs, early repayment, refinancing, and what happens in default and foreclosure.
A car loan, a student loan, a credit card, a mortgage — they’re all the same engine wearing different clothes, and that engine is compound interest running in reverse, working for the lender and against you. This topic teaches borrowing from the customer’s side of the desk so no loan document can ever bluff you again.
Here’s what you’ll walk away knowing:
- Loan anatomy — principal, interest, the rate, and the term, plus what makes a mortgage special.
- Amortization schedules — why early payments are almost all interest, how the split flips over time, and exactly where each month’s money goes.
- Fixed vs variable rates — which one shifts the risk onto you, and when each makes sense.
- APR vs APY — how lenders actually quote rates, so you read the total cost of credit, not just the monthly payment.
- Down payment, loan-to-value & mortgage insurance — how much you put down, what ratio it leaves, and the insurance that triggers.
- Fees & closing costs — the charges hiding in the fine print.
- Life after signing — early repayment, refinancing, default, and foreclosure.
You already know interest and the APR/APY split, so this sits one rung up the ladder: point that machinery at the most common financial decision a person ever makes — borrowing money — and price every trade-off before you sign.
In this topic
- 1 How a Loan Actually Works The anatomy of a loan — principal, interest, rate and term; borrower vs lender; secured vs unsecured and collateral; and what makes a mortgage special. 9 min
- 2 Amortization: Where Your Payment Goes How a fixed monthly payment splits into interest and principal, why early payments are mostly interest, the amortization formula, the schedule, total interest, and how equity builds. 10 min
- 3 Rates & the True Cost of Credit Fixed vs variable rates, how lenders quote the interest rate vs APR vs APY, the shorter-vs-longer term trade-off, and reading the whole cost of credit instead of just the monthly payment. 10 min
- 4 Down Payment, LTV & the Fees The down payment and loan-to-value ratio, why 80% LTV triggers mortgage insurance (PMI), how equity and risk relate, and the closing costs hiding in a loan. 9 min
- 5 Refinancing, Default & Foreclosure Changing or escaping a loan after you sign — extra payments and prepayment penalties, refinancing and its break-even, and what default, foreclosure and negative equity really mean. 9 min
- 6 Final Exam: The Loan Gauntlet A graded, locked capstone — 24 one-shot questions spanning every Loans & Mortgages lesson: loan anatomy, amortization, fixed vs variable rates and the true cost of credit, down payment, LTV and fees, and refinancing, default and foreclosure. 15 min
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