Should you pay off debt or invest? The break-even rate

Last updated June 2026

It feels like a values question — “am I a save-aggressively person or a debt-free person?” — but most of it is arithmetic. Paying down a debt is a guaranteed, tax-free return equal to its interest rate. Investing is an uncertain return. Line those two up and the decision usually makes itself.

The break-even rule

Compare your debt's rate to the return you'd realistically expect, both on an after-tax basis:

if debt rate (after tax) > expected return (after tax) → pay the debt

• Debt clearly wins: credit cards and personal loans at 18–25%. No diversified portfolio reliably beats a guaranteed 20%. Pay these first, always.
• It's a real contest: a 6–8% loan vs. an uncertain ~7% long-run market return — close enough that certainty and taxes tip it.
• Investing usually wins: a 3% mortgage, especially if the interest is deductible, is cheap money; the long-run expected return on investments is higher.

The order that almost always wins

1. Capture the employer 401(k)/RRSP match first. A 50–100% match is an instant return nothing else touches — never leave it on the table, even to kill debt.
2. Kill high-interest debt (roughly 8%+). This is the guaranteed-return sweet spot.
3. Build your cash runway so an emergency doesn't put you back on the cards.
4. Then split between investing and low-rate debt by the break-even rule above.

Where psychology beats the spreadsheet

The math says attack the highest rate first (the “avalanche”). But if knocking out a small balance for the momentum keeps you in the game (the “snowball”), the slightly-worse-on-paper plan you actually finish beats the optimal one you abandon. The best strategy is the one you'll stick to. Two honest caveats to the pure math: a paid-off debt is a guaranteed return with zero volatility, and being debt-free has a real, non-financial value — just price it in deliberately rather than by default.

How Orbeva helps

Orbeva reads your real balances and rates from your connected accounts and lays the two paths side by side — the guaranteed return from paying a specific debt vs. the expected, tax-adjusted return from investing the same dollars — and surfaces the move worth reviewing. It also watches the risks either path can hide, from a thin runway to concentration. Read-only, decision-support: it shows the tradeoff; you decide.

Compare your two paths — start free →

General information and decision support, not financial advice. Rates, tax treatment, and your situation vary; confirm specifics before making large moves.