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Educational and Plan-Administration Disclosure: This article is provided for general educational purposes only. It does not constitute retirement-plan administration, fiduciary, investment, tax, legal, accounting, ERISA, or financial advice. State Employee Advisor Network is a marketing and referral platform operated by Revenx LLC. SEAN does not serve as a 401(k) TPA, plan administrator, recordkeeper, fiduciary, trustee, or investment manager. Employers should verify responsibilities through their plan documents, service agreements, legal counsel, tax professionals, and applicable government agencies.
A 401(k) plan requires ongoing administration after it is established.
Depending on the plan, administrative work may include:
Employers often hire a third-party administrator, commonly called a TPA, to perform some of this work.
However, a TPA does not automatically become responsible for every aspect of the plan.
The exact role depends on the contract and functions the TPA actually performs.
A 401(k) TPA is an outside service provider hired to assist with retirement-plan administration.
A TPA may be:
Typical TPA work focuses on the administrative and technical requirements of operating the plan.
For example, the TPA may help determine whether contributions and participant data comply with the plan document and applicable Internal Revenue Code requirements.
The live article says the TPA manages “everything regarding your 401(k) plan.”
That is too broad.
Responsibilities may be divided among:
Understanding who is responsible for each task is one of the most important parts of operating a retirement plan.
Not necessarily.
“Third-party administrator” is commonly used as an industry service-provider description.
The plan administrator, however, is a role identified under the plan and applicable law.
The employer may remain the named plan administrator while hiring a TPA to perform specified administrative tasks.
For example:
Plan administrator: Employer or committee
TPA: Outside firm performing testing and document support
Employers should therefore check the plan document rather than assume hiring a TPA transfers the legal plan-administrator role.
No.
This is an important correction to the live article.
ERISA fiduciary status generally depends on the functions and discretion exercised, not simply the person's title.
A service provider performing only ministerial tasks, such as:
may not be acting as a fiduciary for those tasks.
A provider can potentially become a fiduciary if it exercises discretionary authority or control over plan management, administration, or assets.
The service agreement should clearly identify what responsibilities the TPA accepts.
No.
The live article suggests employers can hand administration to a TPA and “not worry about any bit.”
That is inaccurate.
For an ERISA-covered plan, selecting a service provider can itself be a fiduciary decision.
Plan fiduciaries generally need to prudently:
Outsourcing work does not automatically outsource every legal responsibility.
The employer should understand who performs each function and periodically confirm that the work is being completed.
A TPA's actual services vary, but common functions may include the following.
A TPA may help an employer evaluate design features such as:
The employer ultimately decides which business objectives and permitted plan features to adopt.
The TPA may then help translate those decisions into the administrative structure.
Qualified retirement plans must operate according to written plan terms.
A TPA may assist with:
Legal responsibility for drafting or interpreting plan language may involve another provider or legal counsel depending on the arrangement.
A TPA should not automatically be assumed to provide legal advice.
Plan eligibility can depend on provisions involving:
The TPA may use employer-provided census and payroll information to determine which employees satisfy the plan's rules.
Incorrect source data can still produce an incorrect result.
The employer therefore needs procedures for supplying complete and accurate information.
A TPA may calculate or review:
For 2026, the regular employee elective-deferral limit for a 401(k) is $24,500.
Eligible participants may also have age-based catch-up capacity.
Monitoring limits may require coordination among:
The TPA cannot ensure accurate contributions if payroll or census data are incomplete.
Traditional 401(k) plans may be subject to annual compliance tests.
These can include:
ADP and ACP testing generally evaluates whether contributions disproportionately favor highly compensated employees.
Some safe harbor plan designs may be exempt from certain annual tests when applicable requirements are satisfied.
A TPA commonly performs these calculations and identifies potential corrective action.
The employer remains responsible for making required corrections when necessary.
A plan may be considered top-heavy when key employees hold more than the applicable percentage of plan assets under federal rules.
When a plan is top-heavy, minimum employer contributions for certain non-key employees may be required.
TPAs frequently help:
Incorrect ownership or family-attribution data can affect this test, so accurate employer information matters.
Depending on the contract, a TPA may help process:
The TPA does not necessarily hold or transfer the money.
The recordkeeper, trustee, or custodian may perform the actual transaction.
This distinction is important when determining who should resolve a distribution problem.
Many retirement plans must file an annual Form 5500-series return/report.
A TPA may prepare or assist with the filing using plan information supplied by the employer and other providers.
However, hiring a TPA does not mean the employer can ignore the filing.
Forms 5500 and 5500-SF generally require an appropriate electronic signature from the plan sponsor/employer or plan administrator. An authorized service provider can use specific procedures when filing on the administrator's behalf.
The employer should review the return before filing and retain required records.
A TPA may help identify deadlines involving:
This administrative support can be valuable because retirement-plan deadlines occur throughout the year.
But the contract should specify which notices the TPA:
A provider saying it “supports compliance” does not necessarily mean it assumes responsibility for every deadline.
The live article correctly recognizes that these roles are different, but the distinction needs more detail.
Some companies provide both services in one bundled arrangement.
A bundled provider does not eliminate the need to identify which entity is contractually responsible for each function.
A TPA and investment adviser generally perform different roles.
A TPA typically concentrates on administration and compliance.
An investment professional may provide services involving:
The live article says financial advisers can select “the right investments” while TPAs cannot make investment decisions.
That is too categorical.
Whether an investment adviser can make decisions depends on the arrangement.
For example, some advisers provide recommendations while the plan sponsor retains decision-making authority. Other appropriately appointed investment fiduciaries may have greater discretion.
Readers can review the 401(k) professional referral page for general information.
Not necessarily.
A firm's TPA services do not automatically authorize it to provide individualized investment advice.
Investment-related services should be evaluated separately.
Ask:
Do not assume retirement-plan administration and investment advisory services are interchangeable.
The live article says TPAs manage taxes and make sure employees receive as much tax benefit as possible.
That overstates the role.
A TPA may perform tax-related retirement-plan calculations and support regulatory compliance.
That does not mean the TPA automatically provides:
Those services may require a CPA, enrolled agent, attorney, or another qualified tax professional.
A TPA can provide valuable technical support, but no service provider can make compliance automatic.
Plan failures can still occur because of:
IRS correction programs exist because retirement plans can make mistakes even when professional providers are involved.
Employers need processes for reviewing administration rather than assuming the TPA has “everything covered.”
Because this article appears on State Employee Advisor Network, governmental-plan rules need to be addressed directly.
Most retirement plans established and maintained by state and local government employers are governmental plans and are generally exempt from Title I of ERISA.
In addition, state and local governments generally have not been permitted to establish new 401(k) plans since May 6, 1986, except for limited categories. Certain governmental 401(k) plans established before that date may continue under grandfather rules.
State and local employees are more commonly offered arrangements such as:
Therefore, statements that every public-sector TPA's main responsibility is “ERISA compliance” are not accurate.
The governing requirements depend on the type of plan.
Readers can review the site's 403(b) vs. 457(b) and 457(b) vs. 401(k) comparisons for additional context.
There is no universal TPA fee.
Possible charges may include:
Some fees may be paid by:
Employers should request a clear written fee schedule.
For an ERISA-covered plan, fiduciaries generally need to consider whether plan expenses are reasonable for the services provided.
The least expensive provider is not automatically the most appropriate provider.
Consider the following before hiring one:
Review the answers in the written service agreement rather than relying on sales descriptions.
The live article's links to retirement planning specialists and the 403(b) vs. 401(k) comparison are also preserved.
State Employee Advisor Network is a marketing and referral platform operated by Revenx LLC. We connect consumers with independent, licensed financial professionals.
SEAN is not a TPA, recordkeeper, plan administrator, investment adviser, broker-dealer, law firm, accounting firm, tax firm, or governmental retirement-system administrator. It does not provide 401(k) administration, ERISA compliance services, investment advice, tax advice, or legal advice.
Professionals participating in the network are independent third parties. They are not employees or representatives of SEAN. All services, analysis, guidance, and recommendations come solely from the professional.
The introduction is free to consumers. Revenx LLC receives compensation from participating professionals for marketing and referral services. This creates a financial incentive to refer consumers to participating professionals.
Consumers should independently evaluate each professional's licensing, registrations, experience, services, fees, compensation, conflicts of interest, and disciplinary history.
Schedule a free introduction to an independent professional.
A 401(k) TPA can assist employers with important administrative work involving:
But a TPA does not automatically manage every part of the plan or remove the employer's responsibilities.
The roles of the employer, plan administrator, TPA, recordkeeper, trustee, investment adviser, payroll provider, and other professionals should be clearly defined.
For state and local governmental employers, the analysis is different because governmental plans generally are not subject to Title I of ERISA and most state and local governments cannot establish new 401(k) plans.
A useful TPA relationship begins with a clear service agreement, accurate plan data, reasonable fees, ongoing communication, and regular monitoring of the provider's work.
A TPA may provide plan-design support, eligibility calculations, contribution calculations, compliance testing, document support, distribution assistance, and government-filing preparation.
No. A recordkeeper primarily tracks participant accounts, transactions, investments, and balances. A TPA generally focuses more heavily on plan administration and compliance, although one provider may perform both functions.
Not automatically. Fiduciary status generally depends on whether the provider exercises discretionary authority or control rather than on the TPA title alone.
No. For an ERISA-covered plan, employers and other fiduciaries may retain duties to prudently select and monitor service providers.
Usually that is a separate function. Investment responsibilities depend on the plan's fiduciary structure and contracts with investment professionals.
A TPA may prepare and transmit Form 5500, but filing and signature responsibilities depend on the arrangement and applicable filing requirements.
No. A TPA can assist with compliance, but incorrect data, operational failures, missed deadlines, or other errors can still create plan problems.
Governmental plans established or maintained by state and local governments are generally exempt from Title I of ERISA. Government employers also face separate rules about whether they may maintain a 401(k).
Jeremy contributes regularly to State Employee Advisor Network. With a deep understanding of state pension systems and public-sector benefits, he offers readers insights and strategies to optimize their retirement outcomes.
State Employee Advisor Network is a marketing and referral platform operated by Revenx LLC. We connect consumers with independent, licensed financial professionals. We are not a registered investment adviser, broker-dealer, or insurance agency, and we do not provide investment, legal, or tax advice.
All financial services are provided solely by third-party professionals. Revenx LLC receives compensation from financial professionals for marketing and referral services, which may create a financial incentive to refer individuals to participating professionals. Users should independently evaluate any financial professional before engaging their services.
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