7.4 IRC §415(c) Annual Additions Limits, Excess Corrections & §404 Deduction Caps

7.4 IRC §415(c) Annual Additions Limits, Excess Corrections & §404 Deduction Caps

[!NOTE] The Dual Statutory Ceilings: In defined contribution administration, administrators must distinguish between two completely separate statutory limitations that operate at different levels of the plan:

1. Participant-Level Ceiling (IRC §415(c)): Limits the total "annual additions" that may be allocated to an individual participant's account in any limitation year (capped at $72,000 in 2026, or 100% of compensation).
2. Employer-Level Deduction Ceiling (IRC §404(a)(3)): Limits the maximum tax-deductible contribution that the sponsoring employer may claim on its corporate tax return across all participants (capped at 25% of aggregate eligible compensation). Confusing these two independent code sections is one of the most frequent sources of compliance errors on the ASPPA QKA examination.

Qualified 401(k) Administrators must master the components that constitute annual additions, the strict rules governing limitation years, the formal correction protocol under the Employee Plans Compliance Resolution System (EPCRS), the interaction with catch-up contributions under IRC §414(v), and the deduction boundaries established by IRC §404.

---

The IRC §415(c) Annual Additions Limitation

Under IRC §415(c)(1) and Treasury Regulation §1.415(c)-1, total annual additions allocated to a participant's account in a defined contribution plan for any limitation year cannot exceed the lesser of:

1. 100% of the participant's IRC §415 compensation; OR
2. The Statutory Dollar Limit:
   • Limitation Year 2024: $69,000
   • Limitation Year 2025: $70,000
   • Limitation Year 2026: $72,000 (Cost-of-living adjusted in $1,000 increments under IRC §415(d)).

+-----------------------------------------------------------------------------------------+
|                   COMPONENTS INCLUDED IN IRC §415(c) ANNUAL ADDITIONS                    |
+-----------------------------------------------------------------------------------------+
|  Included Components (Treas. Reg. §1.415(c)-1(b)) | Excluded Items (§1.415(c)-1(b)(3))   |
|  ------------------------------------------------ | ------------------------------------ |
|  • Employee Pre-Tax Elective Deferrals (§401(k))  | • Age-50 Catch-Up Deferrals (§414(v))|
|  • Designated Roth Elective Deferrals (§402A)     | • SECURE 2.0 §109 Super Catch-Ups    |
|  • Employer Matching Contributions (§401(m))      | • Direct Rollovers & 60-day Rollovers|
|  • Employer Profit-Sharing / Nonelective Contrib. | • Trustee-to-Trustee Transfers       |
|  • Voluntary After-Tax Employee Contributions     | • Participant Loan Repayments        |
|  • Forfeitures Reallocated to Participant Account | • Restorative Fiduciary Payments     |
|  • Key Employee Medical Contributions (§415(l))   | • Dividends on ESOP Stock            |
+-----------------------------------------------------------------------------------------+

The Age-50 Catch-Up Stacking Rule (IRC §414(v))

A paramount statutory rule is that catch-up contributions under IRC §414(v) do NOT count toward the IRC §415(c) limit.

• Under Treasury Regulation §1.414(v)-1(h), catch-up contributions sit entirely on top of the §415(c) dollar limit.
• For an eligible participant attaining age 50 or older by December 31, 2026, the standard catch-up limit is $8,000 ($7,500 in 2024/2025). Therefore, a 50+ participant may receive total contributions of $80,000 ($72,000 §415(c) limit + $8,000 catch-up).
• Under Section 109 of the SECURE 2.0 Act, participants attaining ages 60, 61, 62, or 63 in 2026 are entitled to a "Super Catch-Up" of $11,250 (the greater of $10,000 or 150% of the 2024 age-50 limit of $7,500, as indexed). For these individuals, the maximum combined contribution reaches $83,250 ($72,000 §415(c) + $11,250 Super Catch-Up)!

The 100% of Compensation Limitation

For lower-income or part-time participants, the 100% of compensation limit frequently binds before the dollar ceiling. If a part-time employee earns $18,000 in 2026, their maximum allowable annual additions across all sources (elective deferrals, matching, profit sharing, and forfeitures) cannot exceed $18,000.

[!WARNING] Catch-Up Exception to 100% Comp Limit: Under IRC §414(v)(2)(A), catch-up contributions are exempt from the 100% of compensation limit as well! An employee earning $20,000 who is age 50+ could contribute their entire $20,000 in compensation (up to §402(g)) plus receive employer contributions, provided total non-catch-up additions do not exceed $20,000.

---

Limitation Year & Rules for Short Limitation Years

Under Treasury Regulation §1.415(j)-1, annual additions are measured over a 12-consecutive-month period known as the Limitation Year.

• Default Rule: Unless another period is specified in the written plan document, the limitation year is the calendar year.
• Plan Year Alignment: In most defined contribution plans, the limitation year is aligned with the plan year.

Short Limitation Years

A short limitation year (a period of less than 12 consecutive months) occurs when a plan is established with an initial short period, or when a plan sponsor formally amends the plan to change its limitation year.

When a short limitation year occurs, Treasury Regulation §1.415(c)-1(d)(5) dictates strict mathematical adjustments:

1. Proration of the Dollar Limit: The statutory dollar limit ($72,000 in 2026) must be prorated by multiplying the full dollar limit by a fraction: the numerator is the number of months in the short limitation year, and the denominator is 12:

$\text{Prorated Section 415(c) Limit} = \text{Annual Dollar Limit} \times \frac{\text{Months in Short Limitation Year}}{12}$

• Example: A plan changes its limitation year, creating a 6-month short limitation year in 2026. The dollar limit for that 6-month period is slashed to $36,000 ($72,000 × 6/12).

1. No Proration of the 100% Compensation Limit: The 100% of compensation limit is NOT prorated. However, the compensation measured is strictly the compensation earned during the short limitation year.

---

Correction of Excess Annual Additions Under EPCRS

Prior to 2008, former Treasury Regulation §1.415-6(b)(6) allowed employers to correct excess annual additions administratively through a mechanical "self-help" refund. The IRS eliminated that regulation. Today, an excess annual addition represents a disqualifying operational failure that must be corrected under the Employee Plans Compliance Resolution System (EPCRS) pursuant to Revenue Procedure 2021-30 (as expanded by SECURE 2.0 and IRS Notice 2023-43).

The Mandatory EPCRS Correction Hierarchy

To correct an IRC §415(c) excess in a defined contribution plan under EPCRS, the plan administrator must follow a strict three-tier correction hierarchy:

                   THE EPCRS IRC §415(c) CORRECTION HIERARCHY
                                        │
    ┌───────────────────────────────────┼───────────────────────────────────┐
    ▼                                   ▼                                   ▼
[ TIER 1: After-Tax ]              [ TIER 2: Deferrals ]               [ TIER 3: Suspense ]
Return voluntary after-tax         Return unmatched employee           Place remaining excess employer
employee contributions             elective deferrals (pre-tax         contributions (or forfeitures) in
with allocable earnings.           or Roth) with allocable             an unallocated §415 Suspense
                                   earnings. Form 1099-R Code E.       Account for future plan years.

1. Tier 1: Return Voluntary After-Tax Employee Contributions

If the participant made voluntary after-tax contributions during the limitation year, those after-tax dollars (and their allocable investment earnings) must be distributed to the participant first.

2. Tier 2: Return Employee Elective Deferrals (Form 1099-R Code E)

If an excess still remains after Tier 1, the plan must distribute unmatched employee elective deferrals (both pre-tax and designated Roth) along with Net Allocable Income (NIA):

• Tax Treatment: Unlike §402(g) excess deferrals (which are taxable in the year contributed), corrective distributions of elective deferrals under IRC §415(c) are includible in the participant's gross income in the taxable year distributed.
• Exempt from Penalties: The distributed earnings and pre-tax principal are completely exempt from the IRC §72(t) 10% early distribution penalty.
• Tax Reporting: The distribution is reported on IRS Form 1099-R using Code E (Excess annual additions under IRC section 415) in Box 7.
• Forfeiture of Associated Matches: If matching contributions were allocated based on the refunded deferrals, those matching dollars must be forfeited under Treas. Reg. §1.401(m)-1(b)(4)(iii). Permitting a participant to retain a match on refunded contributions violates IRC §401(a)(4).

3. Tier 3: Place Excess Employer Contributions in a §415 Suspense Account

If the excess consists of employer profit-sharing contributions, employer matching contributions, or forfeitures that cannot be distributed to the participant, the excess funds must be transferred into an unallocated IRC §415 Suspense Account:

• No Employer Reversion: The employer cannot withdraw or reclaim the money. Reverting funds to the employer violates the exclusive benefit rule under IRC §401(a)(2).
• Future Year Offset: In the subsequent limitation year (and continuing into future years until exhausted), the suspense account balance must be allocated to all eligible participants in lieu of new employer contributions.
• Contribution Freeze: The employer is legally prohibited from making any new contributions to the plan until the §415 suspense account is completely exhausted!

---

Employer Deduction Limits Under IRC §404(a)(3)

While IRC §415(c) restricts individual account additions, IRC §404 governs the maximum tax deduction the sponsoring employer may claim on its federal corporate income tax return (Form 1120 or Form 1065) for contributions made to defined contribution plans.

The 25% Aggregate Eligible Compensation Ceiling

Under IRC §404(a)(3)(A)(i), the employer's maximum tax deduction for a taxable year is capped at 25% of the aggregate compensation paid or accrued during the taxable year to all employees benefiting under the plan:

$\text{Maximum Deductible Employer Contribution} = 0.25 \times \sum \text{Eligible Benefiting Compensation}$

• Application of §401(a)(17): In computing aggregate compensation, each individual employee's recognizable compensation is capped at the annual statutory limit ($345,000 in 2024; $350,000 in 2025; $360,000 in 2026).
• Benefiting Employees Only: Compensation is counted only for employees who are eligible to participate and benefit under the plan for that plan year.

The EGTRRA Deferral Carve-Out (IRC §404(n))

A transformative statutory provision that is heavily tested on the ASPPA QKA exam was enacted under the Economic Growth and Tax Relief Reconciliation Act of 2001 (EGTRRA) and codified at IRC §404(n):

[!IMPORTANT] The Elective Deferral Carve-Out (IRC §404(n)): Under IRC §404(n), employee elective deferrals (both pre-tax and designated Roth) are completely EXCLUDED from the 25% employer deduction limitation!

• Elective deferrals do NOT count toward the 25% deduction cap.
• Furthermore, under IRC §404(a)(12), aggregate compensation is calculated before subtracting salary reduction elections (gross compensation includes 401(k) deferrals, §125 cafeteria deferrals, and §132(f) transportation fringes).

+-----------------------------------------------------------------------------------------+
|                   CONTRAST: IRC §415(c) LIMIT VS. IRC §404 DEDUCTION CAP                |
+-----------------------------------------------------------------------------------------+
|  Statutory Feature              IRC §415(c) Annual Additions  IRC §404 Deduction Limit  |
|  ---------------------------    ----------------------------  ------------------------- |
|  Governing Code Level           Individual participant        Total sponsoring employer |
|  Statutory Ceiling (2026)       Lesser of $72k or 100% comp   25% of eligible payroll   |
|  Pre-Tax Elective Deferrals     INCLUDED in Annual Additions  EXCLUDED (Carved Out §404n|
|  Designated Roth Deferrals      INCLUDED in Annual Additions  EXCLUDED (Carved Out §404n|
|  Employer Matching Contrib.     INCLUDED in Annual Additions  INCLUDED in 25% Cap       |
|  Employer Profit-Sharing Cont.  INCLUDED in Annual Additions  INCLUDED in 25% Cap       |
|  Age-50 Catch-Up Deferrals      EXCLUDED (§414(v))            EXCLUDED (§404(n))        |
|  Penalty for Exceeding Limit    Plan Disqualification / EPCRS 10% Excise Tax (IRC §4972)|
+-----------------------------------------------------------------------------------------+

---

The IRC §4972 10% Excise Tax on Nondeductible Contributions

If an employer makes contributions in excess of the 25% deduction limit under IRC §404, the tax consequences are severe:

1. Disallowance of Deduction: The excess contribution cannot be deducted on the employer's corporate income tax return for that taxable year.
2. The 10% Employer Excise Tax (IRC §4972): Under IRC §4972, a 10% excise tax is imposed on the sponsoring employer on the full amount of the nondeductible contribution.
   • Reporting: The employer must report and remit the tax using IRS Form 5330 (Return of Excise Taxes Related to Employee Benefit Plans).
   • Cumulative Nature: The 10% excise tax is not a one-time penalty. It recurs every year until the nondeductible excess is eliminated either by being absorbed as a deductible contribution in a future year (by keeping contributions below the 25% cap) or by returning the excess to the employer under narrow ERISA §403(c)(2) "mistake-of-fact" rules within one year of contribution.

---

Comprehensive Worked Calculation Case Study: §415(c) and §404 Reconciliation

To master the interaction between individual additions and corporate deduction limits, evaluate the following corporate scenario for the 2026 plan year:

Corporate Profile: Apex Technology Logistics, Inc.

• Limitation Year / Plan Year: Calendar Year 2026.
• Aggregate Eligible Payroll: $1,200,000 across 10 eligible employees (no individual earns above the $360,000 cap).
• Employee Elective Deferrals: Total pre-tax and Roth deferrals withheld = $140,000.
• Employer Contributions Funded: Total employer match = $40,000; total profit-sharing = $240,000. Total employer contribution = $280,000.

Step 1: Corporate Deduction Test Under IRC §404(a)(3)

1. Calculate the 25% Deduction Ceiling:

$\text{Deduction Ceiling} = 0.25 \times \$1,200,000 = \mathbf{\$300,000}$

1. Evaluate Total Deductible Contributions:
   • Under IRC §404(n), the $140,000 of employee elective deferrals is completely excluded from the 25% limit.
   • Total employer contributions to be deducted = $40,000 (match) + $240,000 (profit sharing) = $280,000.
2. Deductibility Determination:
   • Because $280,000 ≤ $300,000, 100% of the employer's $280,000 contribution is fully deductible under IRC §404(a)(3).
   • Nondeductible contribution = $0. Excise tax under IRC §4972 = $0.

Step 2: Individual Participant §415(c) Compliance Check

Now examine the individual account of Apex's CEO, Evelyn (Age 52):

• Evelyn's 2026 Compensation: $300,000.
• Evelyn's Contributions:
  • Pre-Tax Elective Deferrals: $24,500 (max 2026 §402(g) limit).
  • Age-50 Catch-Up Deferral: $8,000 (max 2026 §414(v) limit).
  • Employer Matching Contribution: $12,000.
  • Employer Profit-Sharing Allocation: $42,000.
  • Reallocated Forfeitures: $1,500.

+-----------------------------------------------------------------------------------------+
|                   EVELYN'S 2026 IRC §415(c) ANNUAL ADDITIONS AUDIT                      |
+-----------------------------------------------------------------------------------------+
|  Contribution Category                 Amount Deposited   Counts Toward §415(c)?        |
|  -----------------------------------   ----------------   ----------------------        |
|  Standard Elective Deferrals           $24,500            YES                           |
|  Age-50 Catch-Up Contribution          $8,000             NO (Excluded under §414(v))   |
|  Employer Matching Contribution        $12,000            YES                           |
|  Employer Profit-Sharing Allocation    $42,000            YES                           |
|  Allocated Forfeitures                 $1,500             YES                           |
|  -------------------------------------------------------------------------------------- |
|  TOTAL ANNUAL ADDITIONS SUBJECT TO §415(c):               $80,000                       |
|  2026 STATUTORY §415(c) DOLLAR LIMIT:                     $72,000                       |
|  -------------------------------------------------------------------------------------- |
|  EXCESS ANNUAL ADDITION IDENTIFIED:                       $8,000                        |
+-----------------------------------------------------------------------------------------+

Step 3: EPCRS Correction Protocol for Evelyn's Account

1. Identify the Excess: Total annual additions equal $80,000 ($24,500 + $12,000 + $42,000 + $1,500). The 2026 limit is $72,000. Evelyn has an excess annual addition of $8,000.
2. Apply EPCRS Hierarchy:
   • Evelyn made no voluntary after-tax contributions (Tier 1 is N/A).
   • Proceed to Tier 2: The plan administrator must distribute $8,000 of Evelyn's elective deferrals plus net allocable income (NIA) earned on that $8,000.
3. Tax and Reporting Execution:
   • The $8,000 principal plus earnings is distributed to Evelyn.
   • Sponsoring plan issues a Form 1099-R with Code E in Box 7.
   • Evelyn includes the distribution in gross income for the tax year distributed.
   • The distribution is completely exempt from the 10% penalty under IRC §72(t).
   • Any matching contributions associated with that $8,000 deferral are forfeited to the plan's forfeiture account.
   • Evelyn retains her $8,000 Age-50 catch-up contribution intact, as catch-up contributions are statutorily exempt from §415(c).

---

Common ASPPA QKA Exam Traps

• Exam Trap 1: Including Catch-Up Contributions in §415(c): Exam questions will list elective deferrals, catch-up contributions, matching, and profit sharing, asking candidates to compute the total annual additions. Candidates who add the Age-50 catch-up ($8,000 in 2026) to the annual additions total will get the answer wrong. Under IRC §414(v), catch-ups are completely excluded from §415(c).
• Exam Trap 2: Counting Deferrals Against the 25% §404 Deduction Limit: A question may ask whether an employer exceeded the 25% deduction limit when total employer contributions equaled 20% of payroll and employee elective deferrals equaled 8% of payroll (total inflow 28%). Under IRC §404(n), elective deferrals are carved out of the 25% cap. The employer's deductible contribution is only 20%, which is well below the 25% ceiling.
• Exam Trap 3: Form 1099-R Reporting Codes for Excesses: Do not confuse the tax reporting for §402(g) excess deferrals with §415(c) excess annual additions. A timely §402(g) refund is reported with Code P (taxable in the prior contribution year), whereas a §415(c) corrective distribution of deferrals is reported with Code E (taxable in the year distributed).
• Exam Trap 4: Reverting Suspense Account Funds: If an employer contribution cannot be distributed under §415 and is placed in a §415 suspense account, exam questions will tempt candidates to return the money to the employer. Under Treasury Regulation §1.415(c)-1, suspense account funds can NEVER revert to the employer; they must remain unallocated in the plan trust and be used to offset future employer contributions for all eligible participants.