Housing & credit
Pay Off the Mortgage or Invest?
Compare mortgage interest savings with possible after-tax investment growth and the value of keeping cash available.
Mortgage savings and investment returns are not equal risks
An extra principal payment generally avoids interest according to the loan terms. An investment return is uncertain and may be reduced by taxes and fees. Compare the mortgage's effective after-tax cost with a range of after-fee investment returns.
Do not assume a mortgage-interest tax benefit. A federal benefit generally requires eligible interest and itemized deductions, and state treatment can differ. Compare itemizing with the standard deduction using current rules, and enter a verified net benefit only when it applies.
Liquidity has value
Money paid into a mortgage becomes home equity and may be harder or more expensive to access later. Keep cash for emergencies and near-term goals before making a large optional payment.
Check whether the lender applies extra payments directly to principal and whether any penalty exists. An extra principal payment generally reduces interest and may shorten payoff without changing the required next payment. If the loan and servicer allow a recast, the lender re-amortizes the lower balance over the remaining term, usually changing the required payment without replacing the loan. Availability and fees are lender-specific.
Use more than one horizon
Compare the remaining loan term and a shorter period that matches a possible move. Include the investment account's tax treatment and the mortgage balance at each date.
When the results are close, a split strategy can preserve diversification between liquid investments and home equity. Before retirement, also test whether removing the mortgage would lower fixed withdrawals enough to improve resilience during an early market decline. The decision can be revisited as rates, income and priorities change.
Bottom line
Compare predictable mortgage interest savings with uncertain after-tax investment growth, and remember that home equity is harder to access than cash.
Related calculators
Sources
- CFPB: Mortgage Key Terms (opens in a new tab)
- Investor.gov: Introduction to Investing (opens in a new tab)
This guide is for general education, not personal investment, tax, legal or financial advice. Check current rules and talk with a qualified professional when the decision calls for it.