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The Real Cost of Borrowing
What You'll Learn
- Understand how interest works on debt
- Calculate the total cost of debt including interest
- Compare interest rates across different debt types
Interest: The Price of Borrowing
When you borrow money, you don't just pay back what you borrowed—you pay interest, which is the lender's fee for letting you use their money.
Interest might seem small at first (just a few percentage points), but over time it can double or even triple the amount you originally borrowed.
APR: Annual Percentage Rate
The APR tells you the yearly cost of borrowing. A 20% APR means you'll pay 20% of your balance in interest over the course of a year (if you don't pay it down).
The higher the APR, the more expensive your debt.
How Interest Adds Up
Let's look at a real example. Imagine you have a $5,000 credit card balance at 20% APR, and you only make the minimum payment each month.
📊 $5,000 Credit Card Debt Example
Click to see the shocking truth
The Real Cost of Minimum Payments
Original debt: $5,000
Interest rate: 20% APR
Minimum payments only:
- Time to pay off: 17 years
- Total interest paid: $6,923
- Total amount paid: $11,923
You'd pay nearly $12,000 to borrow $5,000.
💡 What If You Pay More?
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Paying $200/Month Instead
Same debt: $5,000 at 20% APR
Fixed payment: $200/month
- Time to pay off: 2.5 years
- Total interest paid: $1,266
- Total amount paid: $6,266
You save $5,657 and 14.5 years just by paying more each month!
Why This Happens
Minimum payments are designed to keep you in debt as long as possible. Most of your minimum payment goes toward interest, not your actual balance. That's how lenders make money.
The fix: Always pay more than the minimum. Even an extra $20-50 per month makes a huge difference.
The Interest Rate Hierarchy
Not all debt charges the same interest. Here's the hierarchy from worst (most expensive) to best (least expensive):
| Debt Type | Typical APR | Cost Level |
|---|---|---|
| Payday Loans | 300-400% APR (annualized) | 🔴 Predatory—avoid at all costs |
| Credit Cards (unpaid balance) | 18-25% APR | 🟠 Very expensive |
| Personal Loans | 8-15% APR | 🟡 Moderate cost |
| Auto Loans | 4-10% APR | 🟢 Lower cost |
| Student Loans (federal) | 4-7% APR | 🟢 Lower cost |
| Mortgages | 3-7% APR | 🟢 Lowest cost (long-term) |
Why the Difference?
Interest rates are based on risk and collateral:
- Mortgages have low rates because your house is collateral—if you don't pay, the lender takes the house.
- Credit cards have high rates because there's no collateral—the lender takes a bigger risk.
- Payday loans charge outrageous rates because they target desperate borrowers with no other options.
Calculating Your Interest
Want to see how much interest you're paying on your debt? Here's a simple calculator:
Debt Interest Calculator
Enter your debt details to see the true cost:
What This Means for You
Interest rates determine how expensive your debt really is. A small difference in APR can mean thousands of dollars over the life of the loan.
High-Interest Debt Strategy
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If You Have High-Interest Debt (15%+ APR):
- Pay it off aggressively. Every month you carry this debt costs you money.
- Stop using the card. Don't add to the balance while paying it down.
- Consider a balance transfer to a 0% APR card (if you qualify).
- Pay more than the minimum—always.
Low-Interest Debt Strategy
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If You Have Low-Interest Debt (under 6% APR):
- Make your regular payments. No need to rush—the interest cost is low.
- Focus extra money on high-interest debt first (credit cards, personal loans).
- Build your emergency fund while making steady loan payments.
- Don't stress. Low-interest debt like mortgages and federal student loans are manageable.
Action Step: Find Your Interest Rates
Look up the interest rate (APR) on every debt you have. Write them down in order from highest to lowest.
Where to find your APR:
- Credit cards: Check your monthly statement or call customer service
- Loans: Review your original loan documents or check your lender's website
- Student loans: Log in to your loan servicer's portal
Knowing your rates is the first step to prioritizing your payoff strategy. In Module 4, you'll learn exactly how to tackle your debt in the smartest order.
You're Building Awareness
Understanding how interest works is empowering. You now know that the APR on your debt determines how much it really costs—and that paying more than the minimum is the fastest way out.
Knowledge is power. You've got this.