Good Debt vs. Bad Debt: How to Tell the Difference
"All debt is bad" is a tidy slogan, but reality is more nuanced. Some borrowing builds your future; some quietly drains it. Here's how to tell which is which.
What counts as "good" debt?
Good debt is borrowing that's likely to increase your net worth or income over time, usually at a reasonable interest rate. Classic examples include a sensible mortgage (you build equity in an appreciating asset), student loans for a degree that meaningfully raises your earning power, or a loan to start or grow a profitable business. The common thread: the borrowed money is an investment with a reasonable expectation of paying off, not just consumption.
What counts as "bad" debt?
Bad debt is high-interest borrowing for things that lose value or get consumed quickly. The poster child is credit card debt carried month to month at 20%+ interest, where compounding works brutally against you. Payday loans are worse still. Financing depreciating "wants" — the latest gadget, a vacation you can't afford — at high interest also lands here. The money is gone, but the payments (and interest) linger.
The gray areas
Plenty of debt isn't clearly good or bad — it depends on the details:
- Auto loans. A modest loan on a reliable car you need for work can be reasonable; a huge loan on a luxury vehicle that depreciates fast is closer to bad debt. See how much car you can afford.
- Student loans. Good when the degree reliably boosts income; risky when the balance dwarfs the earning potential of the field.
- 0% promotional financing. Genuinely useful if you pay it off before the promo ends — and a trap if you don't, since deferred interest can hit hard.
A simple test for any loan
Before borrowing, ask four questions:
- Will it grow my wealth or income? Investment-like borrowing leans good; consumption leans bad.
- What's the interest rate? The lower the better. Double-digit rates demand serious caution.
- Can I comfortably afford the payment within my budget, even if income dips?
- What happens if things go wrong? Could I sell the asset or recover, or would I be stuck with the debt and nothing to show for it?
If a loan grows your future, carries a low rate, fits your budget, and has a reasonable downside, it may be good debt. If it funds consumption at a high rate and strains your finances, it's the kind to avoid — or to pay off as fast as you can.
General educational information, not financial advice. See our disclaimer.