Cash or Deferred Arrangement (CODA)

A cash or deferred arrangement (CODA) is the Section 401(k) feature that lets an eligible employee choose between receiving compensation as current cash or having the employer contribute it to a qualified retirement plan as an elective deferral. A plan containing a qualified CODA is commonly called a 401(k) plan.

The CODA is the employee election mechanism, not the entire retirement plan. Employer matching contributions, profit-sharing contributions, investments, vesting, loans, and distributions are separate plan features with their own rules.

Key Takeaways

• A qualified CODA gives an eligible employee an effective choice between cash compensation and a plan contribution.
• The deferred amount is an employee elective deferral even though the employer deposits it into the plan.
• Pre-tax and designated Roth deferrals use different current tax treatment but generally share one employee-deferral limit.
• An election generally must apply prospectively to compensation that is not already available to the employee.
• A traditional CODA may be subject to Actual Deferral Percentage testing; safe harbor and qualified automatic contribution arrangements use different compliance paths.
• Automatic enrollment is still a cash-or-deferred arrangement because the employee must have an effective opportunity to change or stop the default election.
• Employer matching money is calculated because of an employee contribution, but it is not itself the employee’s elective deferral.
• Current limits, plan terms, payroll definitions, and correction rules must be checked for the applicable year.

How a CODA Works

The employer adopts a qualified plan document with a Section 401(k) feature. An eligible employee then makes an election, usually as a percentage of eligible compensation or a dollar amount per payroll period.

For each covered paycheck, the election produces one of three common outcomes:

Pre-tax elective deferrals generally remain subject to Social Security and Medicare taxes. A qualified Roth distribution can be tax-free, but current Roth contributions are not pre-tax deductions.

The employee’s gross compensation does not disappear. The election changes whether part of that compensation is paid in cash or contributed under the plan and how it is reported for tax purposes.

Worked Example: Payroll and Employer Match

Assume an employee has $5,000 of eligible monthly pay and elects to defer 6% through a 401(k) CODA. The employer separately matches 50% of employee deferrals up to 6% of eligible pay. Assume the employee is eligible, all amounts are within current limits, and the plan applies the formula to this payroll.

$5,000 x 6% = $300 employee elective deferral

$300 x 50% = $150 employer matching contribution

If the employee elects a pre-tax deferral, the $300 is generally excluded from current federal taxable income. If the employee elects Roth treatment, the $300 remains in current taxable income. The $150 match follows the plan’s employer-contribution tax and vesting rules.

The phrase “50% match up to 6%” does not mean the employer contributes 6% of pay. Here, the employer contributes 3% of pay.

Election Timing and Compensation

A cash-or-deferred election generally must be made before the compensation is currently available. An employee usually cannot receive a paycheck, decide afterward that the tax result is undesirable, and retroactively convert part of it into a 401(k) elective deferral.

The written plan and payroll procedures determine:

• when a new election becomes effective;
• whether elections use a percentage or dollar amount;
• how often an employee can change or stop the election;
• whether automatic increases apply;
• which compensation is eligible; and
• how bonuses, commissions, overtime, leave payouts, and post-severance amounts are treated.

A valid election applied to the wrong compensation can still produce a contribution error. Payroll should reconcile the election, eligible-pay definition, deposit, match, and participant statement.

Pre-Tax and Roth Elective Deferrals

A plan can permit pre-tax deferrals, designated Roth deferrals, or both.

Roth and pre-tax are tax treatments within the same elective-deferral framework, not separate annual allowances. An employee can often split an election between them, subject to plan rules and the combined limit.

Contribution Categories and Limits

Four categories are often confused:

1. Elective deferral: amount contributed because of the employee’s CODA election.
2. Matching contribution: employer amount tied to an employee deferral or other eligible employee contribution.
3. Nonelective contribution: employer amount not conditioned on the employee making a deferral.
4. After-tax employee contribution: employee contribution that is neither a pre-tax elective deferral nor a designated Roth deferral.

Different limits and tax rules apply to these categories. The employee’s elective-deferral limit generally coordinates pre-tax and Roth deferrals across 401(k), 403(b), SIMPLE IRA, and certain other plans. A 457(b) generally has a separate deferral limit.

The plan also applies an overall annual-additions limit, compensation rules, possible catch-up rules, and any lower plan-specific limits. Payroll at one employer may not know about a worker’s deferrals under another employer’s plan.

Nondiscrimination Testing and Safe Harbors

A traditional 401(k) CODA generally must satisfy the Actual Deferral Percentage (ADP) test. The test compares elective-deferral rates for highly compensated and non-highly compensated employee groups. An Actual Contribution Percentage (ACP) test can apply to matching and certain employee contributions.

If testing fails, the plan may need corrective distributions, additional employer contributions, or another permitted correction. A highly compensated employee can therefore receive a refund even when the employee did not exceed the personal elective-deferral limit.

A Safe Harbor 401(k) uses required employer contributions and other conditions to satisfy specified ADP or ACP safe harbors. It is not exempt from every qualification, coverage, compensation, deposit, limit, or operational rule.

Automatic Enrollment

An automatic contribution arrangement sets a default deferral when an eligible employee does not make an affirmative election. It can still be a CODA because the employee receives notice and an effective opportunity to elect cash instead, change the rate, or opt out.

Automatic enrollment does not mean:

• the employee is required to keep contributing;
• the default rate captures the full employer match;
• the default investment is risk-free;
• the employee has selected pre-tax or Roth treatment deliberately; or
• the contribution rate will be sufficient for retirement.

The employee should review the default rate, automatic escalation, match formula, tax treatment, and investment election rather than relying on the enrollment label.

Investments, Vesting, and Fees

The CODA creates the contribution choice. The deposited money then follows the plan’s investment and administration structure.

Employee elective deferrals are fully vested. Employer matching or profit-sharing contributions may follow a Vesting schedule unless the plan design requires immediate ownership.

Investment results can be positive or negative. Common costs include fund expense ratios, recordkeeping charges, managed-account fees, loan fees, distribution fees, and other individual-service charges. Tax deferral does not guarantee a return, preserve principal, or make a high-cost plan inexpensive.

Withdrawals and Distributions

Elective deferrals are restricted retirement-plan money. A plan generally cannot distribute them whenever an employee prefers. Permissible events can include severance from employment, death, disability, reaching a specified age, plan termination, or qualifying hardship, depending on law and the plan.

A hardship distribution is not automatically tax-free or exempt from the 10% additional early-distribution tax. A plan loan, if offered, is not a distribution when originated and administered correctly, but default can create taxable consequences.

Traditional distributions are generally taxable unless validly rolled over or attributable to basis. Qualified designated Roth distributions are generally tax-free. Required minimum distribution rules can apply to traditional plan balances and beneficiaries.

CODA vs. Other Salary-Reduction Arrangements

“Cash or deferred” can sound generic, but CODA has a specific Section 401(k) meaning. A salary reduction under another tax-code section should not be analyzed as a CODA merely because current cash pay falls.

How to Evaluate a CODA

1. Confirm that the plan document includes a qualified Section 401(k) feature.
2. Check employee eligibility and the effective date of the election.
3. Verify the plan’s eligible-compensation definition.
4. Separate pre-tax, Roth, matching, nonelective, and after-tax contribution sources.
5. Coordinate elective deferrals across all affected plans and employers.
6. Read the match, true-up, vesting, and employment-on-payment-date rules.
7. Review investments, expenses, defaults, loans, withdrawals, and distributions.
8. Reconcile payroll deductions with deposits and participant statements.

Common Mistakes

• Treating CODA as another name for every salary reduction plan.
• Describing employer matching money as part of the employee’s elective deferral.
• Using obsolete annual limits without checking the current year.
• Assuming pre-tax deferrals avoid Social Security and Medicare taxes.
• Believing Roth and pre-tax deferrals have separate limits.
• Making a retroactive election after compensation is already available.
• Ignoring deferrals to another employer’s 401(k) or 403(b).
• Assuming a hardship distribution is automatically penalty-free.
• Treating safe harbor status as exemption from every plan rule.
• Leaving an automatic-enrollment default unreviewed.

Authoritative Sources and Use Boundary

The IRS 401(k) plan overview explains elective deferrals, plan types, testing, and employer contributions. The IRS hardship distribution issue snapshot defines a qualified CODA and its restricted distribution framework. The IRS qualified-plan requirements guide summarizes CODA compliance and ADP testing.

This article provides general financial education, not tax, legal, fiduciary, payroll, retirement-plan, benefits, or investment advice. The signed plan document, current law, compensation, election timing, payroll records, contribution history, and personal circumstances control the actual result.

Related Terms

• 401(k) Plan: Qualified employer plan that commonly contains a CODA.
• Salary Reduction Plan: Broader payroll-election concept that can apply outside Section 401(k).
• Roth 401(k): Designated Roth account funded with currently taxable elective deferrals.
• Safe Harbor 401(k): CODA design satisfying specified testing safe harbors through required conditions.
• Required Minimum Distribution (RMD): Later-life distribution framework for traditional plan balances and beneficiaries.

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