What is the main difference between a 401k and a 401a?

The main difference is that a 401k is an optional retirement plan you choose to join, while a 401a is a mandatory plan your employer requires you to participate in as a condition of employment.

Which is better, a 401k or a 401a?

Neither is universally better; a 401a often offers higher contribution limits and a mandatory employer contribution, but a 401k gives you more control over your investment choices and contribution amounts.

How does the cost of a 401k compare to a 401a?

Costs vary by plan, but a 401a is typically cheaper for employees because the employer usually pays all administrative and investment fees, whereas 401k fees are often shared between employer and employee.

Is a 401a safer or less risky than a 401k?

Safety depends on your investments, not the plan type, because both a 401a and a 401k are tax-advantaged accounts that carry identical market risk based on the underlying funds you select.

Can I have both a 401k and a 401a at the same time?

Yes, you can contribute to both a 401k and a 401a simultaneously, but your combined employee contributions must stay within the annual IRS limit of $23,000 for 2024.

What is a common beginner mistake with a 401a plan?

A common beginner mistake is assuming a 401a is optional, which leads to missed enrollment deadlines and a loss of the mandatory employer match that you cannot recover later.

Can I switch money from my 401a to my 401k?

Yes, you can roll over funds from a 401a into a 401k after you leave your employer, but you cannot move money between the two plans while you are still employed.

Are a 401k and a 401a interchangeable retirement accounts?

No, a 401k and a 401a are not interchangeable because a 401a is employer-funded and mandatory, while a 401k is employee-funded, voluntary, and offers different withdrawal rules.

Who typically uses a 401a plan in the real world?

Government employees, public school teachers, and university staff typically use a 401a plan, which is a common vehicle for mandatory retirement savings in the public sector.

Can I withdraw my 401a money before retirement without a penalty?

No, you cannot withdraw 401a funds before age 59½ without a 10% penalty, unless you meet a hardship exception, because the plan is designed as a mandatory, long-term retirement vehicle.

Difference Between

Difference Between 401k and 401a

Written byNex Virox Team

Editorial Team

Reviewed byVarshal Nirbhavane

Senior SEO & Organic Growth Professional · 5+ years

Published: September 6, 202619 min read

Quick answer

The main difference between 401k and 401a is that a 401k is offered by private employers with employee contributions and often employer matches, while a 401a is a mandatory, employer-funded plan for government and public-sector workers. 401k is a voluntary retirement savings plan, while 401a is a mandatory, employer-funded plan.

Key takeaways

Core distinction: 401k plans are employee-funded with optional employer matches, while 401a plans are employer-funded.
How each works: 401k lets workers choose contributions and investments, but 401a forces employer-set contribution amounts.
Cost and effort: 401a plans involve higher administrative costs and employer control, whereas 401k plans shift responsibility to employees.
Best-fit use case: 401k suits private-sector employees seeking flexibility, while 401a fits government and nonprofit workers wanting guaranteed contributions.
Common decision mistake: Assuming both allow employee deferrals, yet 401a plans often prohibit voluntary employee contributions entirely.

Table of Contents18 sections

Difference Between 401k and 401a: Comparison Table

Aspect	401k	401a
Definition	Retirement savings plan offered by for-profit private employers to their workers.	Retirement plan offered primarily by government, education, and non-profit employers.
Purpose	Encourages voluntary employee retirement saving through automatic payroll deductions and tax deferral.	Provides retirement benefits to public-sector employees, often as a mandatory condition of employment.
Core Mechanism	Employee elects a salary deferral percentage, which reduces taxable income and grows tax-deferred.	Employer typically sets contribution amounts; employees may or may not contribute their own money.
Contribution Source	Funded primarily by employee elective deferrals, with optional employer matching contributions.	Funded mainly by employer contributions, with employee contributions sometimes allowed or required.
Contribution Limits	Subject to annual IRS elective deferral limits, which were $23,000 in 2024.	Subject to overall defined-contribution limits, which were $69,000 in 2024.
Catch-Up Rules	Workers aged 50 or older may add an extra $7,500 in 2024.	Catch-up contributions generally not available unless the plan permits employee deferrals.
Employer Match	Employers commonly match a percentage of employee contributions, such as 50% of the first 6%.	Employer contributions are typically fixed or formula-based, not dependent on employee deferrals.
Employee Choice	Employees choose whether to participate and how much to defer from each paycheck.	Participation is often mandatory once eligibility criteria are met, with no opt-out option.
Vesting Schedule	Employer match vests over time, often graded over 3 to 6 years of service.	Employer contributions may vest immediately or follow a schedule set by the employer.
Plan Sponsor	Sponsored by for-profit corporations, small businesses, and sole proprietors.	Sponsored by state and local governments, public schools, universities, and non-profits.
Eligibility	Open to all employees of the sponsoring company, often after 1 year of service.	Restricted to specific employee classes, such as public safety officers or university faculty.
Investment Options	Offers a menu of mutual funds, target-date funds, and sometimes self-directed brokerage accounts.	Investment lineup is typically limited to a small set of institutional funds or annuities.
Loan Provisions	Most 401k plans allow borrowing up to $50,000 or 50% of the vested balance.	Loans are rarely permitted under 401a plans, which focus on employer-funded retirement income.
Withdrawal Rules	Distributions before age 59½ incur a 10% penalty unless an exception applies.	Same 10% early withdrawal penalty applies, but hardship withdrawals are rarely allowed.
Required Distributions	Required minimum distributions begin at age 73 for most account holders.	RMDs also begin at age 73, even if the participant is still employed.
Rollover Flexibility	Rollover to an IRA or new employer plan is straightforward and common upon job change.	Rollover options exist but may be restricted while still employed by the sponsoring entity.
Plan Costs	Administrative fees average around 0.5% to 1% of assets annually, depending on plan size.	Fees are often lower due to institutional pricing and pooled purchasing power.
Tax Treatment	Traditional contributions are pre-tax; Roth 401k options allow after-tax contributions with tax-free growth.	Contributions are typically pre-tax, with no Roth option available in most 401a plans.
Portability	Highly portable; accounts move easily between employers via direct rollover.	Less portable because employer contributions may be forfeited if you leave before vesting.
Plan Termination	Employer may terminate the plan at any time, triggering full vesting and distribution options.	Plans are usually permanent and tied to employment contracts or collective bargaining agreements.
Regulatory Oversight	Governed by ERISA, which sets fiduciary standards and participant disclosure requirements.	Government plans are exempt from ERISA but follow state or local statutes and IRS rules.
Contribution Certainty	Employee contributions vary based on individual election and salary changes.	Employer contributions are formula-driven, providing predictable annual funding.
Salary Deferral	Employees can change deferral percentages at any time during the plan year.	Employees typically cannot alter contribution amounts once the plan year begins.
Plan Design	Designed for broad employee participation with high flexibility in features.	Designed for specific employee groups with rigid, contractually defined benefits.
Typical Users	Private-sector employees at corporations, tech firms, retailers, and small businesses.	Public school teachers, university staff, police officers, firefighters, and municipal workers.
Hardship Withdrawals	Allowed for immediate and heavy financial needs, such as medical expenses or foreclosure.	Generally not permitted under 401a plans, even for documented financial emergencies.
Contribution Matching	Employer match is discretionary and can be reduced or eliminated annually.	Employer contribution is a fixed obligation, often defined as a percentage of salary.
Plan Complexity	Moderate complexity with multiple features like loans, Roth, and auto-enrollment.	Lower complexity because the employer controls contributions and few options exist.
Limitations	Subject to market volatility, high fees in small plans, and participant responsibility for savings.	Limited investment choice, no loans, and employee contributions are often mandatory or absent.
Best-Fit Scenario	Best for private-sector employees who want control over savings and investment choices.	Best for public employees seeking stable, employer-funded retirement benefits with low fees.

What Is 401k?

401k is a tax-advantaged retirement savings plan offered by private-sector employers. It lets workers save a portion of their salary before taxes are deducted, with funds growing tax-deferred until withdrawal in retirement.

Definition of 401k

401k is an employer-sponsored defined-contribution retirement account authorized under Internal Revenue Code Section 401(k). Employees elect to defer a percentage of pre-tax or Roth compensation into investments, with annual contribution limits set by the IRS.

Key Characteristics of 401k

Characteristic	What It Means in Practice
Employer-sponsored	Only available through a private-sector company, not opened individually like an IRA.
Pre-tax contributions	Money comes out of your paycheck before income tax, lowering your taxable income now.
Tax-deferred growth	Investments grow without annual capital gains tax until you withdraw funds in retirement.
Contribution limits	IRS caps employee deferrals at $23,500 for 2025, plus a $7,500 catch-up for age 50+.
Employer match	Many companies add matching funds, often 50% of your contribution up to 6% of salary.
Investment menu	You choose from a limited list of mutual funds, target-date funds, or ETFs set by the plan.
Vesting schedule	Employer match becomes fully yours only after a set period, often 3-6 years of service.
Early withdrawal penalty	Taking money before age 59½ triggers a 10% IRS penalty plus ordinary income tax.
Roth option	Some plans allow after-tax contributions with tax-free qualified withdrawals in retirement.
Loan provision	Many plans let you borrow up to $50,000 or 50% of your balance, repaid with interest.

Common Examples of 401k

Fidelity 401(k) – America's largest plan administrator, managing retirement accounts for thousands of major corporations.
Vanguard 401(k) – A leading provider known for low-cost index fund options within employer retirement plans.
Microsoft 401(k) – Tech giant offering a generous dollar-for-dollar match on employee deferrals up to a set limit.
Walmart 401(k) – Retailer's plan includes a company match of 6% of pay plus profit-sharing contributions.
Target-date fund option – A default investment choice that automatically shifts to bonds as retirement approaches.
Roth 401(k) – A plan variant allowing after-tax contributions with tax-free growth and withdrawals.
Safe harbor 401(k) – A plan design with mandatory employer contributions that bypasses nondiscrimination testing.
Profit-sharing 401(k) – Combines employee deferrals with discretionary employer profit-based contributions.
Auto-enrollment plan – A feature that signs employees up at a default rate, usually 3-6% of salary, unless they opt out.
Small business 401(k) – A simplified plan for companies under 100 employees, often with lower administrative costs.

Advantages and Limitations of 401k

Advantages	Limitations
Immediate tax break on contributions reduces your current taxable income.	Contribution limits are low, capping annual savings at $23,500 for most workers.
Employer match is essentially free money that can double your savings rate.	Vesting schedules mean you lose unvested match money if you leave early.
Automatic payroll deductions make consistent saving effortless and habitual.	Limited investment menu restricts choices compared to a self-directed brokerage account.
Earnings grow tax-deferred, compounding faster than a taxable account.	Early withdrawals before 59½ incur a 10% penalty plus full income tax.
High contribution limits far exceed IRA caps, enabling larger annual savings.	Required minimum distributions force taxable withdrawals starting at age 73.
Creditor protection shields balances from bankruptcy and most lawsuits.	Plan fees and expense ratios can quietly erode your returns over decades.
Roth option provides tax-free income in retirement for qualified withdrawals.	Loans reduce your invested balance, and defaulting triggers taxes and penalties.
Rollover options let you move funds to an IRA without tax consequences.	You cannot access funds easily for emergencies, home purchases, or education costs.
Target-date funds offer hands-off diversification for novice investors.	High-cost funds in some plans underperform low-cost index alternatives significantly.
Automatic enrollment boosts participation rates among less engaged employees.	Default contribution rates are often too low to fund a comfortable retirement.

What Is 401a?

A 401a is an employer-sponsored retirement plan for government and public-sector workers. It provides tax-deferred savings, and the employer controls eligibility, contribution limits, and investment options. It exists to reward specific employees, often as a condition of employment.

Definition of 401a

A 401a is a qualified, employer-established retirement savings plan under Internal Revenue Code Section 401(a). It is funded primarily by employer contributions, and participation is typically mandatory for eligible employees. Unlike a 401k, the employer dictates the plan's terms, including vesting schedules and contribution amounts.

Key Characteristics of 401a

Characteristic	What It Means in Practice
Employer-funded	The employer makes most or all contributions, often without requiring employee payroll deductions.
Mandatory participation	Eligible employees must join the plan as a condition of their employment contract.
Employer-controlled terms	The employer sets eligibility, contribution rates, and vesting schedules unilaterally.
Tax-deferred growth	Contributions and earnings grow tax-free until withdrawal, lowering current taxable income.
Vesting schedules	Employer contributions may vest immediately or over a set period, like five years.
No employee deferrals	Employees generally cannot choose to contribute extra money from their own salary.
Defined contribution	The account holds a specific balance, unlike a pension with a guaranteed payout.
Government focus	Commonly offered by state, local, and federal government agencies and public universities.
Distribution rules	Withdrawals before age 59½ may incur a 10% penalty plus income tax.
Portability limits	Funds can roll over to an IRA or new employer plan, but not into a standard 401k easily.

Common Examples of 401a

State University Faculty – Public universities like the University of California offer 401a plans to professors and staff.
City Police Officers – Municipal police departments use 401a plans to fund retirement benefits for sworn officers.
Firefighters – City fire departments provide 401a accounts as part of public safety compensation packages.
Public School Teachers – K-12 teachers in many states receive 401a contributions from their school districts.
Federal Employees – Certain federal agencies use 401a plans for specific senior or contract roles.
County Administrators – County governments fund 401a accounts for elected officials and department heads.
Public Hospital Physicians – State-run hospitals offer 401a plans to attract and retain medical specialists.
Municipal Utility Workers – Publicly owned utility companies provide 401a plans to their unionized workforce.
Court Judges – State court systems often fund 401a retirement accounts for judges and magistrates.
Transit Authority Staff – Metropolitan transit agencies offer 401a plans to bus and rail operators.

Advantages and Limitations of 401a

Advantages	Limitations
Employer pays most costs, reducing your out-of-pocket retirement burden.	You have no control over contribution amounts or investment choices.
Tax-deferred growth lowers your current taxable income effectively.	Early withdrawals face a 10% penalty plus full income tax.
Mandatory participation builds retirement savings automatically without discipline.	You cannot increase contributions when you want to save more.
Vesting schedules reward long-term service and loyalty.	Leaving early can forfeit a large portion of employer contributions.
Rollover options to an IRA preserve your savings if you change jobs.	Rollovers to a 401k are often restricted, limiting flexibility.
No annual employee contribution limit caps your personal input.	Employer contribution limits are set by law, not by your needs.
Plan terms are stable and predictable for budgeting.	Employer can change plan terms, including vesting, with little notice.
Often paired with a pension for a solid retirement base.	Without a pension, the 401a alone may be insufficient for retirement.
Employer handles administration and record-keeping.	You bear all investment risk; there is no guaranteed payout.
Eligibility is clear and tied to your job role.	Ineligible workers get no benefit, creating retirement inequality.

Similarities Between 401k and 401a

Shared Aspect	How 401k and 401a Are Alike
Retirement Purpose	Both 401k and 401a plans exist primarily to help employees accumulate tax-advantaged savings for retirement.
Employer Sponsorship	Both 401k and 401a plans are offered through an employer rather than purchased individually by a worker.
Tax Deferral	Both 401k and 401a allow earnings and contributions to grow tax-deferred until you make a withdrawal.
Pre-Tax Option	Both 401k and 401a permit pre-tax contributions that reduce your current taxable income for the year.
IRS Oversight	Both 401k and 401a plans must follow IRS rules covering limits, distributions, and nondiscrimination testing.
Contribution Limits	Both 401k and 401a share the same annual IRS cap on combined employee elective deferrals.
Roth Feature	Both 401k and 401a plans may offer a Roth option where you contribute after-tax dollars.
Employer Match	Both 401k and 401a can receive employer matching or profit-sharing contributions on your behalf.
Investment Menu	Both 401k and 401a let participants choose from a plan-selected menu of mutual funds and ETFs.
Fiduciary Duty	Both 401k and 401a plan sponsors owe participants a legal fiduciary duty to act prudently.
Age 59½ Rule	Both 401k and 401a withdrawals before age 59½ generally trigger a 10% early distribution penalty.
Required Distributions	Both 401k and 401a plans are subject to required minimum distributions after you turn 73.
Rollover Eligibility	Both 401k and 401a balances can be rolled over into an IRA or a new employer plan.
Loan Provisions	Both 401k and 401a plans may allow participants to borrow against their vested account balance.
Vesting Schedules	Both 401k and 401a plans can apply graded or cliff vesting schedules to employer contributions.
Salary Deferral	Both 401k and 401a fund contributions through automatic payroll deductions from your paycheck.
Plan Documents	Both 401k and 401a operate under a formal written plan document that defines all rules.
Annual Testing	Both 401k and 401a plans run annual compliance tests to ensure they do not favor highly paid staff.
Beneficiary Rights	Both 401k and 401a let you name a beneficiary who inherits the account if you die.
Spousal Protection	Both 401k and 401a typically require spousal consent before naming a non-spouse beneficiary.
Administrative Fees	Both 401k and 401a charge plan-level administrative fees for recordkeeping and compliance services.
ERISA Coverage	Both 401k and 401a plans are generally governed by ERISA, the federal pension protection law.
Portability Value	Both 401k and 401a accounts are portable, so you keep your savings when you change jobs.
Hardship Withdrawals	Both 401k and 401a may permit hardship withdrawals for immediate and heavy financial needs.
Creditor Shield	Both 401k and 401a balances are generally protected from creditors and bankruptcy proceedings.
In-Service Access	Both 401k and 401a may allow in-service withdrawals after you reach a specified plan age.
Contribution Sources	Both 401k and 401a accept money from employee deferrals, employer matches, and profit sharing.
Growth Compounding	Both 401k and 401a benefit from long-term compound growth on reinvested dividends and gains.
Disclosure Forms	Both 401k and 401a provide participants with annual fee disclosures and quarterly statements.
Retirement Income	Both 401k and 401a ultimately serve as a primary income source during your retirement years.

401k or 401a: Which Should You Choose?

Your employer's plan type decides it. If your employer offers a 401k, you choose it. If your employer offers a 401a, you use that. For most people, you have no choice; the employer sponsors one or the other.

When to Use 401k

Choose 401k when your employer sponsors it and you want pre-tax payroll deductions with your own contribution limits. It suits private-sector employees who control their deferral rate, want matching contributions, and need flexible annual contribution choices.

When to Use 401a

Choose 401a when your employer mandates contributions, typically for government or non-profit employees. It fits public-sector workers, like teachers or police, where the employer sets fixed contribution amounts, often with mandatory participation and no employee deferral choice.

Common Misconceptions About 401k and 401a

Common Myth	The Reality
A 401k and a 401a are the exact same retirement plan.	A 401k is offered by for-profit employers, while a 401a is used by government and non-profit employers.
You can open either a 401k or a 401a on your own.	You cannot open either plan yourself; both a 401k and a 401a must be set up by an employer.
Both a 401k and a 401a allow you to choose your own investments.	A 401k usually offers a menu of funds, but a 401a often has investments selected by the employer.
Your employer always matches your contributions to a 401a plan.	In a 401a, employer contributions are often mandatory, but employee contributions are typically voluntary or required.
A 401k is only for people who work at large corporations.	A 401k is available at companies of all sizes, from small startups to large multinational firms.
A 401a is a type of individual retirement account, like an IRA.	A 401a is an employer-sponsored plan, not an individual retirement account, and it is distinct from an IRA.
You can contribute the same dollar limit to both a 401k and a 401a.	The 401k has a higher elective deferral limit, while the 401a limit depends on total employer and employee contributions.
Withdrawals from a 401a before age 59.5 are always penalty-free.	Early withdrawals from a 401a are usually subject to a 10% penalty, just like a 401k.
A 401k plan is always a defined contribution plan, but a 401a is not.	Both a 401k and a 401a are defined contribution plans, not defined benefit pensions.
You can roll a 401a into a new employer's 401k without any tax consequences.	Rolling a 401a to a 401k is usually tax-free, but you must follow specific rollover rules to avoid taxes.
The IRS treats a 401k and a 401a identically for tax deduction purposes.	Contributions to a 401k are pre-tax, but a 401a may be pre-tax or post-tax depending on the plan.
Your 401a contributions are always voluntary, so you can opt out anytime.	Some 401a plans require mandatory employee contributions, and you cannot opt out of those required amounts.
A 401k is a better plan than a 401a for every single employee.	A 401a can offer higher contribution limits and mandatory employer contributions, making it better for some workers.
You can borrow money from a 401a plan just like you can from a 401k.	Loans are often not permitted in a 401a plan, whereas many 401k plans allow participant loans.
Both a 401k and a 401a have the same vesting schedule for employer money.	Vesting in a 401a can be immediate or graded, but a 401k often uses a cliff or graded schedule.
A 401a is only for public school teachers and government employees.	A 401a is used by many non-profits and government bodies, but it is not limited to teachers.
You can have both a 401k and a 401a from the same employer at the same time.	An employer can sponsor both a 401k and a 401a, and you may participate in both plans simultaneously.
The employer must offer a 401k match to every employee who works full-time.	Employers are not required to offer any match in a 401k, and matching is completely optional.
Your 401a balance is owned by your employer until you retire.	Your 401a balance is your property, but employer contributions may be subject to a vesting schedule.
A 401k is a type of pension plan, so it guarantees a monthly income.	A 401k is a defined contribution plan with no guaranteed income, unlike a traditional pension.
You can contribute to a 401a even if you have no earned income.	You must have earned income to contribute to a 401a, just as you must for a 401k.
The contribution limit for a 401a is exactly the same as the limit for a 401k.	The 401a limit is the lesser of 100% of pay or the total contribution limit, which differs from the 401k elective limit.
You can take a hardship withdrawal from a 401a for any financial reason.	Hardship withdrawals from a 401a are limited to specific, immediate and heavy financial needs, like a 401k.
Your employer can force you to take a distribution from a 401k when you leave.	An employer can force a distribution from a 401k if your balance is under $5,000, but larger balances can stay.
A 401a plan never allows employee after-tax contributions.	Some 401a plans allow after-tax employee contributions, which can be rolled into a Roth account later.
You are taxed on a 401a distribution just like you are taxed on a Roth IRA.	Tax on a 401a distribution depends on whether contributions were pre-tax or post-tax, not like a Roth IRA.
Only highly paid executives can participate in a 401a plan.	A 401a plan can cover all employees, but it is often used to provide additional benefits to select groups.
You can convert a 401k into a 401a without any paperwork or tax forms.	Converting a 401k to a 401a requires a direct rollover and must be reported correctly to the IRS.
Your 401a contributions reduce your taxable income just like a traditional 401k.	Only pre-tax 401a contributions reduce taxable income; after-tax 401a contributions do not.
If you leave your job, you must cash out your 401a immediately.	You can leave your 401a with the former employer, roll it over, or cash out, but cashing out triggers taxes.

Conclusion

Difference Between 401k and 401a comes down to employer type and control. A 401k suits private-sector employees seeking flexibility and loans. A 401a fits government or nonprofit workers wanting mandatory, employer-directed retirement savings. Choose 401k for choice; choose 401a for structured, tax-deferred discipline.

FAQs on Difference Between 401k and 401a

What is the main difference between a 401k and a 401a?: The main difference is that a 401k is an optional retirement plan you choose to join, while a 401a is a mandatory plan your employer requires you to participate in as a condition of employment.
Which is better, a 401k or a 401a?: Neither is universally better; a 401a often offers higher contribution limits and a mandatory employer contribution, but a 401k gives you more control over your investment choices and contribution amounts.
How does the cost of a 401k compare to a 401a?: Costs vary by plan, but a 401a is typically cheaper for employees because the employer usually pays all administrative and investment fees, whereas 401k fees are often shared between employer and employee.
Is a 401a safer or less risky than a 401k?: Safety depends on your investments, not the plan type, because both a 401a and a 401k are tax-advantaged accounts that carry identical market risk based on the underlying funds you select.
Can I have both a 401k and a 401a at the same time?: Yes, you can contribute to both a 401k and a 401a simultaneously, but your combined employee contributions must stay within the annual IRS limit of $23,000 for 2024.
What is a common beginner mistake with a 401a plan?: A common beginner mistake is assuming a 401a is optional, which leads to missed enrollment deadlines and a loss of the mandatory employer match that you cannot recover later.
Can I switch money from my 401a to my 401k?: Yes, you can roll over funds from a 401a into a 401k after you leave your employer, but you cannot move money between the two plans while you are still employed.
Are a 401k and a 401a interchangeable retirement accounts?: No, a 401k and a 401a are not interchangeable because a 401a is employer-funded and mandatory, while a 401k is employee-funded, voluntary, and offers different withdrawal rules.
Who typically uses a 401a plan in the real world?: Government employees, public school teachers, and university staff typically use a 401a plan, which is a common vehicle for mandatory retirement savings in the public sector.
Can I withdraw my 401a money before retirement without a penalty?: No, you cannot withdraw 401a funds before age 59½ without a 10% penalty, unless you meet a hardship exception, because the plan is designed as a mandatory, long-term retirement vehicle.