Retirement terms make more sense when you know whether they describe an account, a tax rule, a benefit or an investment choice.
Use this glossary to decode workplace-plan documents, IRA rules, Social Security estimates and retirement statements. The definitions are intentionally practical and do not replace the rules of your specific plan or account.
Retirement accounts and plan types
401(k)
An employer-sponsored defined-contribution plan that can allow employee salary deferrals and employer contributions. Traditional and Roth contribution options may be available depending on the plan. The account’s investments and fees depend on the plan menu.
403(b)
A retirement plan commonly offered by public schools, certain tax-exempt organizations and eligible ministers. It can allow employee salary deferrals and employer contributions under plan rules.
457(b)
A deferred-compensation retirement plan used by many state and local government employers and some tax-exempt organizations. Distribution and rollover rules differ in some ways from 401(k) plans.
Traditional IRA
An individual retirement arrangement. Contributions may be deductible when eligibility rules are met. Earnings generally grow tax-deferred, and taxable distributions are generally included in income when withdrawn.
Roth IRA
An individual retirement arrangement funded with after-tax contributions. Contributions are not deductible, and qualified distributions may be tax-free when the rules are met.
SEP IRA
A Simplified Employee Pension arrangement in which an employer, including an eligible self-employed person, contributes to traditional IRAs established for participants.
SIMPLE IRA
A Savings Incentive Match Plan for Employees used by eligible smaller employers. Employees can make salary-reduction contributions and the employer makes required matching or nonelective contributions under the plan rules.
Defined benefit plan
A pension plan that promises a benefit determined by the plan’s formula, often using factors such as pay and years of service. It differs from an individual account whose final value depends on contributions and investment results.
Defined contribution plan
A plan such as many 401(k)s in which contributions go to an individual account. The retirement value depends on contributions, investment performance, fees, withdrawals and other account activity rather than a promised monthly benefit.
Contributions, ownership and job changes
Elective deferral
Money an employee chooses to contribute from pay to an eligible workplace retirement plan. Annual federal limits apply and can change by year.
Employer match
An employer contribution tied to employee contributions under the plan’s formula. Match formulas, eligible compensation and timing vary by employer.
Vesting
The point at which employer-provided retirement benefits become nonforfeitable under the plan’s schedule. Employee salary-deferral contributions are generally fully vested, while employer contributions may follow a vesting schedule.
Rollover
A transfer of retirement money from one eligible retirement account or plan to another under applicable tax rules. Direct rollovers can help avoid mandatory withholding and reduce the chance of an accidental taxable distribution.
Catch-up contribution
Additional contribution room available to eligible older participants in certain retirement accounts or plans. Amounts and special age rules can change by year.
Beneficiary
The person, trust or entity designated to receive an account or benefit after the owner’s death, subject to plan and account rules. Beneficiary designations should be reviewed after major family changes.
Withdrawals and retirement income
Distribution
Money paid out from a retirement plan or IRA. A distribution may be taxable, partly taxable or tax-free depending on the account type, prior tax treatment and reason for the payment.
Early distribution
A withdrawal taken before the age or event specified by tax law or the plan. Many early distributions are taxable and may also face an additional federal tax unless an exception applies.
Required minimum distribution, or RMD
The minimum amount many retirement-account owners must begin withdrawing under federal tax rules after reaching the applicable starting age. Roth IRAs do not require RMDs for the original owner while alive, although beneficiary rules apply.
Annuity
A contract, usually issued by an insurance company, that can provide payments under stated terms. Guarantees depend on the contract and the claims-paying ability of the insurer; fees, surrender charges, investment features and tax treatment vary.
Pension
A term commonly used for defined-benefit plans that pay benefits under a formula. Some pension benefits are federally insured within legal limits through the Pension Benefit Guaranty Corporation, while not every retirement arrangement has PBGC coverage.
Social Security retirement benefit
A federal benefit based primarily on a worker’s covered earnings record and claiming age. Spouses, former spouses, survivors and some dependents can qualify for family benefits under separate eligibility rules, even when the person receiving the family benefit has a different work history.
Investment terms inside retirement accounts
Asset allocation
How a portfolio is divided among broad asset categories such as stocks, bonds and cash. The appropriate mix depends on goals, time horizon, liquidity needs and capacity for loss.
Diversification
Spreading exposure across different investments, issuers, sectors, asset classes or geographies so one holding does not control the entire outcome. Diversification does not guarantee a profit or prevent broad market losses.
Expense ratio
An annual fund operating expense expressed as a percentage of fund assets. It is taken from fund assets and reduces investor returns even when it is not shown as a separate bill.
Target-date fund
A fund designed around an approximate retirement year, usually shifting its asset allocation over time. Funds with the same target year can have different allocations, glide paths, fees and risk.
Common retirement-term mistakes
- “My IRA is invested.” An IRA is the account. Money inside it can still sit in cash until you choose an investment.
- “Roth means tax-free no matter what.” Roth tax treatment depends on account and distribution rules.
- “My employer manages my 401(k), so the balance is guaranteed.” A defined-contribution account can rise or fall with investments and fees.
- “If I never paid Social Security tax, I can never receive a benefit.” Some spouses, divorced spouses, survivors and dependents can qualify on another worker’s record when the eligibility rules are met.
- “An annuity is always guaranteed income for life.” Annuity contracts differ. Payment period, riders, insurer strength, surrender terms and investment features matter.
Where to verify a term
Start with the document or agency responsible for the rule. Use the Retirement Planning Guide for the broader planning framework and Social Security for claiming and family-benefit questions.
Primary sources
MoneyBucket provides general educational information, not individualized tax, legal, investment or retirement-plan advice. Plan documents and current agency rules control.