Good debt vs bad debt
What you'll learn
Learn a simple test for which debt to fear and which can be tolerated.
Not all debt is equal. The useful split is not good versus bad in a moral sense - it is tolerable versus dangerous. One simple test separates them: what did the borrowing buy, and what does it cost?
Run any debt through two questions:
- What did it fund? Something that holds value, grows, or earns (tolerable), or spending that is already gone (dangerous)?
- What is the rate? Low-cost borrowing is easier to live with; high-cost debt compounds against you fast.
The two questions as a grid
| Funded an asset that holds value | Low cost | High cost |
|---|---|---|
| Yes | Most tolerable | Be cautious |
| No | Be cautious | Most dangerous |
The bottom-right corner - high-cost debt for things already gone - is the kind to fear and clear first. Think expensive borrowing for a holiday spent, a meal eaten, or everyday spending that outran the wage.
The top-left - low-cost borrowing against something durable, like a home - is the kind that can be tolerated while you focus on the dangerous debt.
Why this matters for workers
High-cost debt quietly transfers your future wages to a lender. Spotting it early, and aiming your repayments at it first, keeps more of what you earn in your own pocket. It is not about never borrowing; it is about never letting the dangerous kind take root.
Key takeaways
- Judge debt by what it bought and what it costs, not by morality.
- High-cost debt for spending already gone is the kind to fear and clear first.
- Low-cost debt against a durable asset can be tolerated, but still carries risk.
- The goal is keeping your future wages yours, not avoiding all borrowing.
Illustrative only: rough relative cost of common debt types to show the spread, not actual rates. Real rates vary widely by lender and by you. Always check the current rate. Not a forecast.
Frequently asked questions
Is all debt bad?
No. Debt is a tool. Low-cost borrowing against something that holds or grows in value can be sensible. The danger is high-cost debt against things that lose value or vanish.
What is the single most useful test?
Ask what the borrowing bought and what it costs. Debt for an appreciating or productive asset at a low rate is tolerable; high-cost debt for spending that is already gone is the kind to fear.
Where does a mortgage fit?
A mortgage is usually treated as lower-cost debt secured against a home, but it is still debt with real risk, and missing payments has serious consequences.
General information, not financial advice. The value of investments can fall as well as rise, and figures and rules can change; check the current position before acting.