Most financial advice treats all debt as the enemy. Pay it off, avoid it, never borrow. But that’s an oversimplification that can actually cost you money in the long run.
The truth is that some debt helps you build wealth. Other debt destroys it. The difference comes down to one question: does this debt put money in your pocket or take it out?
What Is Good Debt?
Good debt is borrowing that increases your net worth or generates future income. The interest rate is typically low, and the asset or opportunity you’re financing is worth more than what you paid for it — or will be.
Examples of good debt:
Mortgage — borrowing to buy a home you live in or rent out. Property typically appreciates over time, and a mortgage allows you to own an appreciating asset with a relatively low interest rate. You’re building equity with every payment instead of paying rent that builds someone else’s equity.
Student loans (with conditions) — borrowing to fund education that leads to significantly higher earning potential. A $30,000 loan for a degree that increases your income by $20,000 per year pays for itself quickly. The same loan for a degree with no clear career path is a different calculation entirely.
Business loans — borrowing to start or grow a business that generates more profit than the cost of the loan. If you borrow $10,000 at 8% interest and generate $30,000 in additional revenue, that’s good debt.
Investment property loans — borrowing to purchase property that generates rental income exceeding the mortgage payment and expenses. The tenant effectively pays off your loan while the property appreciates.
Key takeaway: Good debt has a low interest rate and finances something that grows in value or generates income greater than the cost of borrowing.
What Is Bad Debt?
Bad debt is borrowing to purchase things that lose value immediately or don’t generate any return. The interest rates are typically high, and you end up paying significantly more than the original purchase price.
Examples of bad debt:
Credit card debt — the most common and damaging form of bad debt. Average interest rates of 18–28% compounded monthly mean a $3,000 balance can cost over $6,000 by the time it’s paid off. You’re paying double for things you already consumed.
Buy-now-pay-later — feels like a harmless way to spread payments but often carries high interest rates and encourages spending beyond your means on depreciating purchases.
Car loans (high interest) — cars lose 15–25% of their value in the first year. A car loan at 10%+ interest on a depreciating asset means you’re paying interest to own something worth less every day. A modest car loan at 3–4% is more acceptable — the rate matters.
Personal loans for lifestyle spending — borrowing to fund vacations, weddings, or electronics. These purchases generate no return and the debt remains long after the experience is over.
Payday loans — the worst form of debt. Annual interest rates can exceed 300%. These are financial traps that are extremely difficult to escape once entered.
The Grey Area — It Depends on the Terms
Some debt falls between good and bad depending on the specific terms and your situation.
Car loans — necessary for most people but the rate and amount matter enormously. A $10,000 car at 4% is very different from a $40,000 car at 12%.
Student loans — the degree and career prospects matter more than the loan itself. The same debt load is good or bad depending entirely on what it leads to.
Home equity loans — borrowing against your home’s value at low rates for home improvements that increase property value can be good debt. Using the same loan to fund a vacation is bad debt.
How to Evaluate Any Debt Before Taking It
Ask these four questions:
1. What is the interest rate? Below 5% — generally acceptable for the right purpose. 5–10% — proceed carefully. Above 10% — avoid unless absolutely necessary. Above 15% — almost never worth it.
2. Does this purchase appreciate or depreciate? Assets that grow in value (property, education, business) justify borrowing. Things that lose value immediately (cars, electronics, clothes) generally don’t.
3. Does it generate income? Debt that funds income-generating assets pays for itself. Debt that funds consumption does not.
4. Can I comfortably afford the payments? Even good debt becomes bad if the payments stretch your budget to the point where one missed paycheck creates a crisis. Make sure your emergency fund is in place before taking on new debt obligations.
The Priority Order for Paying Off Debt
If you have multiple debts, this is the order to tackle them:
- Payday loans first — interest rates are catastrophic, eliminate immediately
- Credit cards — high interest, pay aggressively using the avalanche method
- Personal loans — typically 10–20% interest, pay down after cards
- Car loans — lower priority if the rate is reasonable
- Student loans — lowest priority if the rate is low
- Mortgage — lowest priority, often better to invest spare money than overpay
The Bottom Line
Debt is a tool. Like any tool, it can build something valuable or cause serious damage depending on how it’s used. Low-interest debt that finances appreciating assets or income-generating opportunities can accelerate wealth building. High-interest debt that finances consumption destroys it.
Before borrowing anything, ask whether this debt is working for you or against you. The answer should be clear before you sign.
Read next:
- What Is Compound Interest and How Does It Work? — understanding how interest compounds helps you see exactly why high-interest debt is so dangerous
- How to Create a Monthly Budget From Scratch — a budget is the foundation that keeps debt manageable