Good debt vs bad debt: what to pay off first
"Debt" is treated as a single dirty word, but lenders and money are more nuanced than that. Some debt is a tool that builds wealth; some is a trap that drains it. Knowing which is which tells you what to clear first.
What makes debt "good"
Good debt generally funds something that grows in value or income and carries a reasonable interest rate:
- Mortgages — buy an appreciating asset at low rates, with tax advantages in some countries.
- Student loans — when they meaningfully raise earning power.
- Business loans — when they generate more than they cost.
Good debt isn't "free" — it's debt where the expected return beats the interest rate.
What makes debt "bad"
Bad debt funds depreciating things or carries punishing interest:
- Credit card balances — often 20%+ interest, compounding fast.
- Payday loans — among the most expensive debt that exists.
- Financing depreciating purchases — high-interest loans on things that lose value quickly.
The defining feature of bad debt is a high rate that compounds faster than anything it bought could ever return.
Interest rate decides the order
When choosing what to pay first, the interest rate matters more than the label. A 22% credit card costs you far more than a 6% mortgage, so it should be first in line regardless of category. Rank your debts by rate and attack the most expensive — that's the avalanche method, and it saves the most money.
The Loan Payoff Calculator shows how much interest each debt is really costing you and how fast extra payments clear it.
A practical priority order
- Emergency fund first (a small starter cushion) so you don't take on new bad debt at the first surprise.
- High-interest bad debt — credit cards, payday loans — paid off aggressively.
- Moderate-rate debt — car and personal loans.
- Low-rate good debt — mortgages, low student loans — paid on schedule while you invest elsewhere.
Don't rush to kill good debt
It can feel virtuous to pay off a low-rate mortgage early, but if that money could earn more elsewhere — or you still carry high-interest debt — the math says otherwise. Clear the expensive debt first; let cheap debt ride while your money works harder somewhere else.
The bottom line
Good debt funds appreciating assets at fair rates; bad debt funds depreciation at brutal rates. Sort your balances by interest rate, build a small safety cushion, then crush the most expensive debt first. See what each balance truly costs and how quickly you can clear it in the Loan Payoff Calculator.