Retirement Plan Basics

Plan Basics 101: A Beginner's Guide to Retirement Plans

Helping business owners, advisors, and CPAs understand the core components of workplace retirement plans.
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What Is a Retirement Plan?

A workplace retirement plan is a tool for helping employees save for their future. It provides tax advantages, a structure for saving and investing, and (often) employer contributions. These plans help attract talent, reduce tax burdens, and improve long-term financial wellness.

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Common types of plans:

401(k): Employee-driven savings with employer match options

Profit Sharing: Employer contributes discretionary amounts

Cash Balance: A defined benefit plan that looks like a 401(k) but has pension-style funding

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Who’s In and When?

Eligibility: The rules for who can join and when. Often age 21 + 1 year of service. (Some plans now include Long-Term Part-Time (LTPT) workers after 2–3 years.)

Entry Date: The specific date an eligible employee can begin participating. Usually monthly or quarterly.

Auto Enrollment: Automatically enrolls employees unless they opt out. It boosts participation and can help meet Safe Harbor or QACA rules.

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Where Does the Money Come From?

Employee Deferrals: The portion of pay employees choose to contribute.

Employer Contributions:

Match: Based on what the employee defers

Profit Sharing: Discretionary employer contribution

Money Types: Each source of money has its own name and rules (e.g., deferrals, Roth, match, rollover).

Catch-Up Contributions: Extra savings allowed for employees age 50+.

Visual: A pie chart showing the sources of money going into a participant account.

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How Does the Plan Stay Fair?

Nondiscrimination Testing: Ensures the plan doesn’t favor highly paid employees. Two big ones:

ADP (deferrals)

ACP (match/after-tax)

Safe Harbor: A plan design that avoids this testing by making required employer contributions.

Highly Compensated Employees (HCEs): Earned more than $155,000 (2024) or own >5% of the company.

Key Employees: Important for top-heavy testing. Often owners or officers with high comp.

Top Heavy: When >60% of plan assets belong to key employees. May require minimum contributions for others.

Visual: Flowchart of testing → pass/fail → consequences.

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What About Timing?

Plan Year: The 12-month cycle the plan uses for administration. Often the calendar year.

Vesting: How much of the employer money an employee “owns.” Deferrals are always 100% vested; employer funds may have a vesting schedule.

Normal Retirement Age (NRA): The plan’s defined retirement age (often 65) that triggers full benefits and vesting.

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Who’s Running the Show?

Plan Sponsor: The employer who sets up and maintains the plan.

TPA (Third Party Administrator): Handles testing, documents, and plan operations. That’s us.

Record Keeper: Tracks individual account balances, investments, and transactions.

Fiduciaries:

3(16): Admin duties (e.g., approving distributions)

3(21): Investment advisor, shares responsibility/

3(38): Investment manager, full discretion

Visual: Org chart showing who does what.

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Taking Money Out

Loans: Borrow from yourself, pay it back with interest.

Distributions: Withdrawals at retirement, termination, death, or disability. Taxable unless Roth-qualified.

RMDs: Required Minimum Distributions starting at age 73 (or 75 for those born in 1960 or later).

Force-Outs: Accounts under $5,000 may be distributed to former employees who don’t respond.

Common Retirement Plan Terms & Concepts

 
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Plan Document

The legal blueprint for your retirement plan. It dictates how the plan works—eligibility, contributions, distributions, and more. If it’s not in here, it doesn’t count. Period.

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Plan Year

The 12-month period used for administration and compliance testing. Often aligns with the calendar year—but it doesn’t have to.

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Entry Date

The specific date(s) on which eligible employees can begin participating. Usually the first day of the month or quarter after meeting eligibility.

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Eligibility

The rules defining who can join the plan and when. Common default: age 21 and 1 year of service, but SECURE 2.0 has made it more flexible—and more complex.

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Normal Retirement Age (NRA)

The age (typically 65) when a participant is considered “retirement-eligible” under the plan. Impacts vesting and required distributions.

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Money Types

Refers to the source of funds in an account: employee deferrals, employer match, profit sharing, Roth contributions, and rollovers. Each has unique rules and treatment.

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Allocations

How employer contributions are divided among eligible employees. Based on pay, flat amounts, or sometimes age-weighted magic.

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Employer Match

Contributions from the company that match a portion of employee deferrals. A popular incentive—and tax deduction.

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Profit Sharing

A discretionary employer contribution. Can be uniform or skewed to favor specific groups (legally).

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New Comparability

A profit sharing formula that allows different groups to get different percentages—great for favoring older/higher-paid staff without flunking compliance.

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Catch-Up Contributions

Extra deferrals allowed for participants age 50 or older. Because the IRS knows you’ve got some catching up to do.

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Roth 401(k)

Contributions made after-tax, with qualified withdrawals tax-free. Good for younger savers and those expecting higher taxes later.

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After-Tax Contributions

Non-Roth, post-tax contributions. Rare, but useful for “mega backdoor Roth” strategies if the plan allows.

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Nondiscrimination

The rule that a plan can’t favor highly paid employees too much. Ensures fairness—and keeps Uncle Sam happy.

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ADP/ACP Testing

Annual tests to make sure HCEs don’t defer or get matched at rates too much higher than non-HCEs:

ADP = Actual Deferral %

ACP = Actual Contribution %

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Safe Harbor

A plan design that skips ADP/ACP testing by promising certain employer contributions and participant notices. Testing headache = gone.

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Coverage Testing (410(b))

Makes sure enough non-HCEs are covered by the plan. It’s the “who’s in and who’s not” test.

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Controlled Group

When multiple businesses are considered one employer under IRS rules. Common with family-owned or related companies. Plan coordination required.

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Affiliated Service Group

Businesses that work closely together and are treated as a single employer. More nuance, more complexity, same result: coordinate your plans.

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Plan Aggregation

Combining multiple plans for testing purposes—typically to help pass nondiscrimination or top-heavy tests.

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Top Heavy

Occurs when key employees hold more than 60% of plan assets. If triggered, non-key employees must receive minimum contributions.

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Key Employees

Defined by IRS: owners, officers with high comp, or certain high-earning staff. Not just “important people”—it’s a legal label.

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Highly Compensated Employees (HCEs)

Employees who earned over a certain amount (e.g., $155,000 in 2024) or own more than 5% of the business. They trigger special testing requirements.

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Excludable Employees

Employees that can legally be left out of testing—for now—such as under age 21 or with less than 1 year of service.

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Third Party Administrator (TPA)

That’s us. We keep the gears turning—handling compliance, documents, testing, and consulting. Not just form-fillers—we’re your plan’s strategic partner.

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Record Keeper

The technology platform that tracks individual account balances, investments, and transactions. Think “TurboTax for retirement plans”—without the deductions.

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Census Data

Employee and payroll info needed to administer the plan. If it’s wrong, everything downstream will be too.

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Form 5500

The annual return/report filed with the IRS and DOL. Tells the government what’s going on in the plan each year.

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Valuation Date

The date when plan assets and liabilities are measured. Critical for DB and CB plans.

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Fiduciary (3 Types)

3(16): Handles plan operations. Can reduce employer liability.

3(21): Offers investment advice. Shares fiduciary duty with employer.

3(38): Manages plan investments. Takes full investment responsibility.

Fiduciaries must act in the best interest of participants. No exceptions.

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Loans

Participants can borrow from their own account and repay themselves with interest. Sounds great—until someone misses a payment and it becomes taxable.

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Distributions

Withdrawals from the plan, typically allowed at retirement, termination, disability, or death. Taxable unless qualified (like Roth).

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Force-Out (Cash-Out) Distributions

Small balances (under $5,000) can be distributed or rolled into an IRA if the participant ghosts after leaving the company.

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Required Minimum Distributions (RMDs)

Participants must begin taking distributions at age 73 (or 75, depending on birth year). Uncle Sam wants his tax revenue.

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Auto Enrollment

Automatically enrolls eligible employees unless they opt out. Boosts participation—and may satisfy certain Safe Harbor requirements.

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Qualified Default Investment Alternative (QDIA)

The default investment option for employees who don’t choose one. Must be “prudent” to protect the plan fiduciaries.

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Cash Balance (CB) Plans

A type of DB plan that feels like a 401(k): participants see a hypothetical account, but the plan has traditional pension obligations under the hood.

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Defined Benefit (DB) Plans

Old-school pensions. Provide a specific benefit at retirement based on salary and service. Great for long-term savings—if you can stomach the complexity.

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Accrued Benefit

The amount of benefit a participant has earned so far in a DB plan. Think of it as a pension balance, not always visible to the employee.

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Actuarial Assumptions

The interest rates, mortality tables, and other data used to calculate benefits and contributions in DB and CB plans.

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Funding Target

The present value of future DB plan benefits. Used to determine how much the employer needs to contribute.

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LTPT (Long-Term Part-Time)

Employees working 500+ hours for 2–3 consecutive years must be allowed to defer—even if they’re still part-time. Thanks, SECURE 1.0 & 2.0.

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Plan Leakage

Assets leaving the plan early via loans, withdrawals, or cash-outs. It erodes participant outcomes and hurts long-term savings goals.

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Retirement Readiness

A measure of whether a participant is on track to retire with sufficient income. The end goal of all these moving parts.

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Participant Outcomes

The real metric of plan success: are employees actually able to retire comfortably? Not just compliance—results matter.

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Financial Wellness

Programs that help employees improve budgeting, debt, and savings behaviors. A growing trend to support better outcomes and reduce plan leakage.

Want Help?

We’re here to guide you through the process—from plan design to employee education. Whether you’re a business owner, advisor, or CPA, we’re your retirement plan partner.