Glossary
Tax-Deferred
Tax-deferred means investment money and its growth are not taxed in the years they are earned, but instead when the money is eventually withdrawn — the treatment inside traditional 401(k)s and IRAs.
Deferral helps two ways: contributions may reduce current taxable income, and growth compounds without annual tax drag on dividends and gains. The bill is postponed, not forgiven — withdrawals are taxed as ordinary income, and required minimum distributions eventually force them.
Why it matters in practice
Deferral is most valuable when today's tax rate exceeds the rate expected in retirement, which is the standard case for peak earners. It also creates the retiree's signature planning asset: control over timing. Income can be realized deliberately in low-tax years — the gap between retirement and RMD age is the classic window for Roth conversions at low rates. A tax-deferred balance is best read net of taxes: some fraction of it belongs to the government.
Related terms: Traditional IRA · 401(k) · Required Minimum Distribution · Roth IRA · Compound Interest