Should I pay off debt or invest in my 401(k)?

Do both at minimum levels, then let interest rates guide the rest. First, contribute to your 401(k) enough to get the full employer match — that is a 50–100% guaranteed return that no debt payoff can match. Then compare your debt's interest rate to your expected investment return (generally 6–8% for a diversified long-term portfolio). High-rate debt (7%+ APR) usually wins; low-rate debt (3–5%) is a toss-up or investing may come out ahead.

What interest rate is the break-even between paying debt vs. investing?

Most financial planners use 6–7% as the approximate break-even. Debt above that rate is likely costing you more after the risk premium on investment returns is considered. Below that rate, investing in a diversified portfolio has historically been the better long-term move — though with higher variance than guaranteed debt payoff.

What about student loans specifically?

Use the same interest rate logic. Federal student loans at 4–6% are generally borderline — many people choose to invest while making minimum payments. Student loans above 7–8% (common for graduate and private loans) warrant prioritizing payoff over additional retirement contributions beyond the match.

Should I ever pause 401(k) contributions to pay off debt faster?

Only if you are still contributing enough to capture the full employer match. Never reduce contributions below the match threshold — the match is a guaranteed return that high-interest debt can barely compete with. Beyond that, pausing or reducing to accelerate debt payoff can make sense for very high-rate debt (15%+ credit cards) where the math is unambiguous.

What is the right order of financial priorities?

The most widely recommended priority order: (1) 401(k) to employer match, (2) high-interest debt payoff, (3) emergency fund to 3–6 months, (4) Roth IRA to maximum, (5) additional 401(k) toward the limit, (6) taxable investing or low-interest debt payoff. Many variations of this exist, but the core logic — employer match first, then let interest rates guide — is broadly consistent.

Should I Max Out My 401(k) or Pay Off Debt?

The Rule: Match First, Then Compare Rates

The employer 401(k) match changes the calculation fundamentally. Before comparing debt interest rates against investment returns, the match question comes first.

A 50% employer match on your first 6% of contributions = a 50% guaranteed return on that money before a single dollar of investment growth. There is no debt interest rate that competes with this. Forfeiting the match to pay down debt faster — unless the debt is truly catastrophic — is almost always the wrong move financially.

Step 1: Always contribute to capture the full employer match.

After that, the decision depends on your debt interest rates.

The Interest Rate Framework

Debt Interest Rate	Decision
0–4%	Generally invest beyond the match; low-rate debt is cheap and investment expected returns are higher
4–6%	Borderline — either approach is defensible; personal risk tolerance can guide the decision
6–8%	Leaning toward debt payoff; a coin flip depending on personal timeline and psychology
8%+	Prioritize debt payoff over contributions beyond the match
15%+ (credit cards)	Aggressive debt payoff; this is the overwhelming priority after the match

Expected long-term investment returns in a diversified portfolio are approximately 6–8% annualized (nominal). Paying off 8% debt is a guaranteed 8% return. Investing for 8% is an expected return with substantial variance. For most people, certainty has value.

How to Think About It Psychologically

Some people find a clear, aggressive target (pay off the debt completely) more motivating than a split approach. The behavioral benefit of paying off debt — closing a psychological loop, eliminating a monthly obligation — has real value even when the pure math is a close call.

If the choice is between:

Investing an extra $300/month at 7% expected return while carrying 6% debt
Paying off the 6% debt in 12 months and then investing $300/month with no obligation

Many financial planners say: do whatever you will actually stick with. The difference in outcome between these two paths over 30 years is smaller than the difference between having a plan and not having one.

Common Scenarios

Credit Card Debt (15–28% APR)

This is unambiguous: after capturing the employer match, aggressively pay off credit card debt before additional retirement contributions. Credit card interest rates are almost never beaten by investment returns reliably.

Federal Student Loans (4–8% APR)

At 4–5%: reasonable to invest beyond the match while making minimum payments. At 7–8%: seriously consider accelerating payoff. At 5–6%: genuine toss-up; a split approach (extra retirement + extra loan payment) is defensible.

Mortgage (5–7% APR)

A mortgage in the 5–6% range is close to the break-even. Most financial planners still recommend prioritizing tax-advantaged retirement accounts over extra mortgage payments — the mortgage interest deduction exists, 401(k) contributions reduce taxable income, and the mortgage is long-dated low-risk debt. Above 7%, extra mortgage payments become more compelling.

Car Loan (5–8% APR)

Similar logic to student loans. A 5% car loan does not beat expected market returns sufficiently to prioritize payoff over tax-advantaged investing. A 9% car loan might — though aggressively refinancing a high-rate car loan is often the better move than simply paying it down.

The Waterfall Decision

A practical priority order that most financial advisors agree on:

401(k) to employer match — guaranteed return, never skip
Emergency fund — 3–6 months of essential expenses in cash (prevents debt spiral)
Credit card debt — pay off completely
Roth IRA to maximum ($7,000 in 2026)
High-rate debt (above ~7%)
More 401(k) — work toward the $23,500 limit
Lower-rate debt and/or taxable investing

This order handles the most common situations. Individual circumstances (mortgage deduction, specific debt rates, income level) can shift the exact order for some people.