Should you pay off debt or invest? Compare the two rates
The decision is arithmetic, not temperament. Clearing a 30% debt is a guaranteed 30% return — and nothing you can buy offers that with certainty.
This gets presented as a philosophical question. It is not. It is a comparison between two numbers, and one of them is certain.
The rule
Compare the interest rate on the debt with the return you can reasonably expect from investing.
- Debt rate higher? Clear the debt. Paying off a loan costing 30% a year is a guaranteed, risk-free 30% return. No investment offers that with certainty.
- Debt rate much lower? Investing may make sense — with the emergency fund already in place.
- Close? Clear the debt. Its return is certain; the investment's is not, and certainty is worth something.
Two things people get wrong
Comparing against the best case. The honest comparison is against a reasonable expectation, not the number in the brochure. A debt rate is a fact. An investment return is a hope with a range around it.
Forgetting the emergency fund. Throwing everything at debt with no buffer means the next emergency goes back on credit, often at a worse rate. Build a small buffer first, then attack.
A rough order that works for most people: a one-month starter buffer, then all expensive debt, then the full emergency fund, then investing. It is slower than it looks and it is very hard to knock over.
The debts that are not really a decision
Anything at very high rates — payday-style lending, informal credit quoted monthly, revolving balances — is not part of a portfolio conversation. It is an emergency, and it comes before everything except food and rent.
The part that is not arithmetic
Some people carry debt badly. If a balance is costing you sleep, clearing it slightly "too early" buys something no spreadsheet can price.
That is a legitimate reason. Just make it a decision you have named, rather than one you drifted into.
Do this today
List every debt with its actual annual rate — not the monthly figure, the annual one. Some of those numbers will be larger than you expect, and that is precisely the point.
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