Account type;Tax treatment basics;Typical use
Traditional 401(k)/IRA;Contributions often pre-tax, growth tax-deferred, withdrawals taxed as ordinary income in retirement.;Lower current taxable income, build retirement savings.
Roth 401(k)/Roth IRA;Contributions after-tax, growth tax-free, qualified withdrawals tax-free.;Pay tax now, aim for tax-free income later.
Taxable brokerage;No upfront break, but flexible, gains and income taxed along the way.;General investing, goals before retirement age.
529 plan;After-tax contributions, tax-free growth and withdrawals for qualified education.;Future education costs.