Good Debt vs Bad Debt: How to Tell the Difference

"All debt is bad" is simple but wrong. Some borrowing builds your future; some quietly erodes it. Knowing the difference helps you decide what to pay off first and what to be relaxed about. Here's a plain way to tell them apart.

The core test

Ask two questions about any debt:

1. Does it buy something that grows in value or income?
2. What's the interest rate?

Debt that funds an appreciating asset or higher earning power, at a low rate, can be reasonable. Debt at a high rate for things that lose value is the kind to escape.

"Good" debt (used wisely)

• A mortgage — buys an asset that may appreciate and builds equity; usually a relatively low rate.
• Student loans — can raise lifetime earnings, though only if the degree pays off and the balance is sensible.
• A business loan — if it generates more income than it costs.

The word "wisely" matters: a too-big mortgage or a degree that doesn't pay off can turn "good" debt bad. Use the loan calculator to see the true total cost before borrowing.

"Bad" debt

• Credit card balances — high interest (often 20%+), usually for things that don't last. This compounds against you fast; see the credit card payoff calculator.
• Payday and high-interest personal loans — extremely expensive; avoid where possible.
• Financing depreciating purchases at high rates — borrowing for things losing value while interest piles up.

The defining trait of bad debt: you keep paying long after the benefit is gone.

The interest-rate lens

Even "good" categories become bad at a high enough rate, and even "bad" categories are less urgent at 0%. A useful rule of thumb: anything above roughly 8–10% behaves like bad debt and deserves aggressive payoff, because few investments reliably beat that return. Lower-rate debt can be paid down steadily while you also save and invest.

What to do about each

1. Attack high-interest (bad) debt first — it's a guaranteed "return" equal to the interest rate. See snowball vs avalanche.
2. Keep a buffer so you don't add new bad debt for emergencies — an emergency fund is the prevention.
3. Manage low-rate (good) debt calmly — pay it on schedule while you also build savings and invest; rushing to clear a 4% mortgage often isn't the best use of a dollar.

Debt isn't the enemy — expensive debt is. Sort yours by rate and purpose, and the priorities become obvious.

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This is general information, not financial advice. The right approach depends on your rates, goals, and situation.