Good Debt vs. Bad Debt: A Practical Line
Not all debt is equal. The difference comes down to what it buys and what it costs.
"All debt is bad" is a tidy slogan and a poor rule. Borrowing is a tool; whether it helps or harms depends on what it funds and what it costs.
A working definition
- Potentially good debt is borrowing that buys something likely to grow in value or increase your income, at a reasonable interest rate. Think a mortgage on a sensibly priced home, a student loan for a degree with real earning power, or a loan for a sound business.
- Bad debt funds things that lose value or get consumed, often at a high interest rate. Think credit-card balances on everyday spending, or a car loan far bigger than you need.
The two questions
When you are unsure, ask:
- What does it buy? An appreciating asset or your future earning power — or a depreciating want?
- What does it cost? A 3–7% mortgage is a different animal from a 22% credit-card balance. The higher the rate, the worse almost any debt becomes.
Why high-interest debt is urgent
Paying off a balance that charges 22% is the rare guaranteed, risk-free, tax-free return: every dollar you put toward it saves you 22 cents a year you would otherwise pay. No investment offers that with certainty. This is why most plans say to attack high-interest debt before investing beyond a basic emergency fund and any employer match.
Even "good" debt has limits
A mortgage is reasonable — until it is so large it crowds out saving and leaves no cushion. A student loan is reasonable — until it funds a credential with little earning power. Good debt taken to excess behaves like bad debt.
The takeaway
Judge debt by its job and its price tag. Borrow for things that build value at modest rates, avoid high-interest debt for things that fade, and when you do carry a costly balance, clearing it is one of the best "investments" available.