Tax-Deferred.

Tax-deferred status means that taxes on investment gains, interest, or contributions are postponed until a future date — typically when funds are withdrawn — rather than assessed in the year the income is earned. The most familiar tax-deferred vehicles in the United States are traditional 401(k) plans, traditional IRAs, and deferred annuities. Contributions to a traditional 401(k) or deductible IRA reduce taxable income in the year of contribution, and the invested assets grow without annual tax drag on dividends, interest, or capital gains. All taxes are assessed when distributions are taken, at the investor's ordinary income rate at that time. The economic power of tax deferral comes from the ability to compound returns on money that would otherwise have been paid to the government. A dollar that might generate a 25% tax liability on its annual income instead remains fully invested, compounding year over year until withdrawal. Over long horizons, this effect can be substantial: a portfolio compounding at 8% annually inside a tax-deferred account grows significantly faster than an equivalent after-tax account where taxes are paid each year on dividends and realized gains. Tax deferral is most beneficial when the investor's tax rate at withdrawal is lower than their rate during the contribution years — a common scenario for savers who contribute during peak earning years and withdraw in retirement with lower income. The disadvantage is that required minimum distributions (RMDs) force withdrawals beginning at age 73, potentially triggering ordinary income tax at a rate the investor cannot fully control.