Should you pay off a 8% loan or invest?
Paying off a 8% loan earns you a guaranteed 8% return — no market, no risk. Investing offers a higher expected return (~7% in stocks) but with real risk. So the decision comes down to one comparison: 8% certain vs ~7% risky.
The rule of thumb, and where it breaks
A useful default: pay off any loan above about 6–7% before investing in a taxable brokerage, because few investments reliably beat that after tax and risk. Below that, investing tends to win on average. But the rule bends:
- Guaranteed beats risky. The loan payoff has zero volatility. Getting the same expected return in the market requires taking real risk — a bad decade can wipe out the paper advantage.
- Taxes and match come first. A 401(k) match (~100% instant) and tax-advantaged space usually beat both paying off a moderate loan and taxable investing.
- Behavior and cash flow. Clearing a loan frees up monthly cash and removes a psychological weight — worth a lot even when investing edges ahead on a spreadsheet.
This compares a guaranteed loan rate to a risky ~7% expected return; it isn't tax advice. High-interest debt (credit cards, many personal loans) should almost always be cleared before investing. Model your full picture in the calculator.
Why 8% sits above the bar a portfolio has to clear
Paying down a loan hands you a return equal to its rate, and that return is guaranteed and risk-free — the money is saved no matter what markets do. At 8%, you are matching or beating the long-run return most planners assume a diversified stock-and-bond portfolio earns, and you are doing it without the volatility, the sequence-of-returns risk, or the taxes that come with investing.
A stock-heavy portfolio might average more over decades, but the word might is the whole problem. The 8% from the loan is certain; the market's edge is an expectation with a wide range of outcomes around it, including years of real losses. When the guaranteed number is this close to the risky expected one, the risk-free choice usually wins on the math and clearly wins on peace of mind.
Two things still come first, even at this rate: capture the full employer 401(k) match, an immediate return no loan payoff can rival, and keep an emergency fund so a surprise does not push you onto a credit card at a far worse rate.
Common questions
Should I pay off a 8% loan or invest?
At 8%, pay the loan off first. Its guaranteed 8% return beats a typical ~7% risky stock return once you adjust for risk, and it frees up cash flow immediately.
What loan interest rate is worth paying off before investing?
A common threshold is about 6–7%. Above it, paying off the loan is a hard-to-beat guaranteed return; below it, investing tends to build more wealth on average. Always clear high-interest debt (credit cards) first.
Does paying off debt count as a return?
Yes — eliminating a 8% loan is economically identical to earning a guaranteed, tax-free 8% on that money. That's why high-rate debt is one of the best "investments" available.