Good Debt vs Bad Debt: When Borrowing Actually Helps
"Get out of all debt" is catchy, but it's incomplete. Some debt is a tool that builds wealth; some is a leak that drains it. The skill isn't avoiding debt — it's telling them apart.
The Dividing Line
- Good debt finances something that holds or grows value, or raises your future income. The interest is often lower, and the asset pays you back.
- Bad debt finances things that lose value the day you buy them, at high interest. You pay more than the item was ever worth.
Examples
| Good debt | Why | Bad debt | Why |
|---|---|---|---|
| Student loan (reasonable) | Raises earning power | Payday loan | 400% APR, no asset |
| Mortgage (well-priced) | Builds equity, forces savings | High-APR credit card splurge | Funds depreciation at 22%+ |
| Business loan (planned) | Funds income | Car loan (long, upside-down) | Asset drops faster than balance |
| Mortgage-rate refi | Lowers cost | Buy-now-pay-later impulse | Convenience at a premium |
When "Good" Turns Bad
Even mortgage and student debt go sour if:
- The rate is high relative to the asset's return
- You borrow more than the asset is worth
- The payments stress your emergency buffer
Leverage amplifies both directions. A 7% mortgage is fine; a 29% cash-advance "loan" against your own credit card is not.
The Test to Run on Any Debt
Before borrowing, ask:
- Does this buy an asset or income, or just consumption?
- Is the rate below what that asset is likely to return?
- Can I still sleep if payments double?
Two "no"s and it's bad debt — pay cash or don't buy.
Use Good Debt, Kill Bad Debt
Attack high-APR bad debt first with our Debt Avalanche Calculator, which ranks balances by rate so your extra cash hits the worst debt first. Keep good debt that's priced fairly and working for you.
Debt isn't the enemy. Expensive debt on things that lose value is. Borrow for assets, pay cash for consumption, and let the math decide the rest.