Two paths, two outcomes
"Good debt" and "bad debt" aren't moral judgments — they're about whether the borrowing actually helps you. Here's the test:
The good-credit test
Did the borrowed money buy something that grows in value, earns you money, or helps you earn more later? If yes → probably good. If no → probably bad.
Side-by-side examples
Good
Student loan for a degree that doubles your salary
You owe $20k but earn $30k more per year. Math works.
Bad
Maxed-out credit card for clothes you stopped wearing
You owe $2k at 25% interest. Math doesn't work.
Good
Mortgage on a house that gains value
You pay interest, but the house grows in worth.
Bad
Buy Now Pay Later on $300 sneakers
Shoes lose value the second you wear them. You're still paying in 6 months.
Good
A credit card you pay off in full every month
Builds your score for free. Costs $0 in interest.
Bad
A credit card where you only pay the minimum
$1,000 balance can take 10+ years to pay off.
The 9th grader's framework
Before borrowing anything, ask yourself three questions:
- 1. Could I just save up for this instead? If yes, do that.
- 2. Will I still want this in 12 months? If no, skip it.
- 3. Can I pay it back without changing how I live? If no, danger zone.
True story (composite)
Maya, 19, gets her first credit card with a $500 limit. She uses it for gas, then pays it off every month from her summer job. After 12 months her credit score is 720. She qualifies for a cheap apartment with no co-signer.
Her friend Sam gets the same card, uses it for concerts and DoorDash, and only pays the $25 minimum each month. After 12 months Sam owes $847 on a $500 limit (over-limit fees + interest) and has a score of 580.
The takeaway
Same card. Same income. The only difference was how they used it. That's the whole lesson.