Mortgage Payoff vs Invest
Pay off if: mortgage rate > expected after-tax investment return. Invest if: rate < return. Most cases invest wins long-term.
| Mortgage rate | — |
| Investment return | — |
| After-tax mortgage | — |
| After-tax investment | — |
| Annual advantage | — |
| Invest 10-yr value | — |
| Faster payoff balance | — |
The mortgage payoff vs invest debate centers on after-tax returns. Pay off if mortgage rate (after-tax) exceeds expected investment return (after-tax). Most cases: invest wins long-term, but psychology often favors payoff. Account for tax deduction + capital gains tax.
After-Tax Math
After-tax mortgage rate = Rate × (1 - bracket) IF you itemize. Standard deduction makes mortgage interest non-deductible (post-TCJA $14K+/year). Compare to after-tax investment return: 7% × (1 - 15% LTCG) = 5.95%. Mortgage at 6.5% (5.07% after-tax if itemizing): close call.
Psychology vs Math
Math: invest the difference, mortgage stays cheap inflation hedge. Psychology: paying off feels great — no debt = freedom. Behavioral finance: many who 'plan to invest' actually spend the extra cash. If you'll truly invest, math wins. If you'd spend, mortgage payoff wins.
When Payoff Is Right
(1) Mortgage rate above 7-8%. (2) Approaching retirement (lower risk tolerance). (3) Want guaranteed return (it's like 6.5% bond). (4) Don't trust yourself to invest. (5) Want to free up cash flow. (6) Stress reduction priority.
Last updated May 2026. Sources: CFPB Mortgage Tips.