StacksVerified U.S. regulatory reference

26 CFR §1.415(f)-1

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)In general. Except as provided in paragraph (g) of this section (regarding multiemployer plans), and taking into account the rules of paragraph (b)(2) (regarding the break-up of affiliated employers and affiliated service groups), paragraph (c) (regarding predecessor employers), and paragraph (d)(1) (regarding nonduplication rules) of this section, section 415(f) and this section require that for purposes of applying the limitations of sections 415(b) and (c) applicable to a participant for a particular limitation year—
    1. (1)All defined benefit plans (without regard to whether a plan has been terminated) ever maintained by the employer (or a predecessor employer within the meaning of paragraphs (c)(1) and (c)(2) of this section) under which the participant has accrued a benefit are treated as one defined benefit plan;
    2. (2)All defined contribution plans (without regard to whether a plan has been terminated) ever maintained by the employer (or a predecessor employer within the meaning of paragraphs (c)(1) and (c)(2) of this section) under which the participant receives annual additions are treated as one defined contribution plan; and
    3. (3)All section 403(b) annuity contracts purchased by an employer (including plans purchased through salary reduction contributions) for the participant are treated as one section 403(b) annuity contract.
  2. (b)Affiliated employers, affiliated service groups, and leased employees
    1. (1)General rule. See § 1.415(a)-1(f)(1) and (2) for rules regarding aggregation of employers in the case of affiliated employers and affiliated service groups. See § 1.415(a)-1(f)(3) for rules regarding the treatment of leased employees.
    2. (2)Special rule in the case of the break-up of an affiliated employer or an affiliated service group
      1. (i)In general. A formerly affiliated plan of an employer is taken into account for purposes of applying paragraph (a) of this section to the employer, but the formerly affiliated plan is treated as if it had terminated immediately prior to the cessation of affiliation with sufficient assets to pay benefit liabilities under the plan, and had purchased annuities to provide plan benefits. See § 1.415(b)-1(b)(5)(i) for rules determining annual benefits under a terminated defined benefit plan under which annuities are purchased to provide plan benefits.
      2. (ii)Definitions. For purposes of this paragraph (b)(2), a formerly affiliated plan of an employer is a plan that, immediately prior to the cessation of affiliation, was actually maintained by one or more of the entities that constitute the employer (as determined under the employer affiliation rules described in § 1.415(a)-1(f)(1) and (2)), and immediately after the cessation of affiliation, is not actually maintained by any of the entities that constitute the employer (as determined under the employer affiliation rules described in § 1.415(a)-1(f)(1) and (2)). For purposes of this paragraph (b)(2), a cessation of affiliation means the event that causes an entity to no longer be aggregated with one or more other entities as a single employer under the employer affiliation rules described in § 1.415(a)-1(f)(1) and (2) (such as the sale of a subsidiary outside a controlled group), or that causes a plan to not actually be maintained by any of the entities that constitute the employer under the employer affiliation rules of § 1.415(a)-1(f)(1) and (2) (such as a transfer of plan sponsorship outside of a controlled group).
  3. (c)Predecessor employer
    1. (1)Where plan is maintained by successor. For purposes of section 415 and regulations promulgated under section 415, a former employer is a predecessor employer with respect to a participant in a plan maintained by an employer if the employer maintains a plan under which the participant had accrued a benefit while performing services for the former employer (for example, the employer assumed sponsorship of the former employer's plan, or the employer's plan received a transfer of benefits from the former employer's plan), but only if that benefit is provided under the plan maintained by the employer. In such a case, in applying the limitations of section 415 to a participant in a plan maintained by the employer, paragraph (a) of this section requires the plan to take into account benefits provided to the participant under plans that are maintained by the predecessor employer and that are not maintained by the employer. For this purpose, the formerly affiliated plan rules in paragraph (b)(2) of this section apply as if the employer and predecessor employer constituted a single employer under the rules described in § 1.415(a)-1(f)(1) and (2) immediately prior to the cessation of affiliation (and as if they constituted two, unrelated employers under the rules described in § 1.415(a)-1(f)(1) and (2) immediately after the cessation of affiliation) and cessation of affiliation was the event that gives rise to the predecessor employer relationship, such as a transfer of benefits or plan sponsorship.
    2. (2)Where plan is not maintained by successor. With respect to an employer of a participant, a former entity that antedates the employer is a predecessor employer with respect to the participant if, under the facts and circumstances, the employer constitutes a continuation of all or a portion of the trade or business of the former entity. This will occur, for example, where formation of the employer constitutes a mere formal or technical change in the employment relationship and continuity otherwise exists in the substance and administration of the business operations of the former entity and the employer.
  4. (d)Special rules
    1. (1)Nonduplication. In applying the limitations of section 415 to a plan maintained by an employer, if the plan is aggregated with another plan pursuant to the aggregation rules of paragraph (a) of this section, a participant's benefits are not counted more than once in determining the participant's aggregate annual benefit or annual additions. For example, if a defined benefit plan is treated as if it terminated immediately prior to a cessation of affiliation under paragraph (b)(2) of this section, the plans maintained by the employer (as determined after the cessation of affiliation) that actually maintains the plan do not double count the annual benefit provided under the plan by aggregating under paragraph (a) of this section both the participant's annual benefit provided under the plan and the participant's annual benefit under the plan as a formerly affiliated plan (which is a plan that the employers formerly affiliated with the employer must take into account as a terminated plan under the rules of paragraph (b)(2) of this section). Instead, the plans maintained by the employer include the annual benefit provided to the participant under the actual plan that the employer maintains. Similarly, if a defined benefit plan maintained by an employer (the transferee plan) receives a transfer of benefits from a defined benefit plan maintained by a predecessor employer (the transferor plan) and the transfer is described in § 1.415(b)-1(b)(3)(i)(B) (which requires the transferred benefits to be treated by the transferor plan as if the benefits were provided under a plan that must be aggregated with the transferor plan that terminated immediately prior to the transfer), the transferee plan does not double count the transferred benefits under paragraph (a) of this section by taking into account both the actual benefit provided under the transferee plan and the benefit provided under the deemed terminated plan that the predecessor employer is treated as maintaining (and that otherwise would have to be taken into account by the transferee plan under the predecessor employer aggregation rules of paragraph (a) of this section). Instead, the transferee plan takes into account the transferred benefits that are actually provided under the transferee plan (see § 1.415(b)-1(b)(3)(i)(C)) and, pursuant to paragraph (c)(1) of this section, any nontransferred benefits provided under plans maintained by the predecessor employer with respect to a participant whose benefits have been transferred to the transferee plan.
    2. (2)Determination of years of participation for multiple plans. If two or more defined benefit plans are aggregated under section 415(f) and this section for a particular limitation year, in applying the reduction for participation of less than ten years (as described in section 415(b)(5)(A)) to the dollar limitation under section 415(b)(1)(A), time periods that are counted as years of participation under any of the plans are counted in computing the limitation of the aggregated plans under this section.
    3. (3)Determination of years of service for multiple plans. If two or more defined benefit plans are aggregated under section 415(f) and this section for a particular limitation year, in applying the reduction for service of less than ten years (as described in section 415(b)(5)(B)) to the compensation limitation under section 415(b)(1)(B), time periods that are counted as years of service under any of the plans are counted in computing the limitation of the aggregated plans under this section.
  5. (e)Previously unaggregated plans
    1. (1)In general. This paragraph (e) provides rules for those situations in which two or more existing plans, which previously were not required to be aggregated pursuant to section 415(f) and this section, are aggregated during a particular limitation year and, as a result, the limitations of section 415(b) or (c) are exceeded for that limitation year. Paragraph (e)(2) of this section provides rules for defined contribution plans that are first required to be aggregated pursuant to section 415(f) and this section in a plan year. Paragraph (e)(3) of this section provides rules for defined benefit plans that are first required to be aggregated pursuant to section 415(f) and this section, and for defined benefit plans under which a participant's benefit is frozen following aggregation.
    2. (2)Defined contribution plans. Two or more defined contribution plans that are not required to be aggregated pursuant to section 415(f) and this section as of the first day of a limitation year do not fail to satisfy the requirements of section 415 with respect to a participant for the limitation year merely because they are aggregated later in that limitation year, provided that no annual additions are credited to the participant's account after the date on which the plans are required to be aggregated.
    3. (3)Defined benefit plans
      1. (i)First year of aggregation. Two or more defined benefit plans that are not required to be aggregated pursuant to section 415(f) and this section as of the first day of a limitation year do not fail to satisfy the requirements of section 415 for the limitation year merely because they are aggregated later in that limitation year, provided that no plan amendments increasing benefits with respect to the participant under either plan are made after the occurrence of the event causing the plan to be aggregated.
      2. (ii)All years of aggregation in which accrued benefits are frozen. Two or more defined benefit plans that are required to be aggregated pursuant to section 415(f) and this section during a limitation year subsequent to the limitation year during which the plans were first aggregated do not fail to satisfy the requirements of section 415 with respect to a participant for the limitation year merely because they are aggregated if there have been no increases in the participant's accrued benefit derived from employer contributions (including increases as a result of increased compensation or service) under any of the plans within the period during which the plans have been aggregated.
  6. (f)Section 403(b) annuity contracts
    1. (1)In general. In the case of a section 403(b) annuity contract, except as provided in paragraph (f)(2) of this section, the participant on whose behalf the annuity contract is purchased is considered for purposes of section 415 to have exclusive control of the annuity contract. Accordingly, except as provided in paragraph (f)(2) of this section, the participant, and not the participant's employer who purchased the section 403(b) annuity contract, is deemed to maintain the annuity contract, and such a section 403(b) annuity contract is not aggregated with a qualified plan that is maintained by the participant's employer.
    2. (2)Special rules under which the employer is deemed to maintain the annuity contract
      1. (i)In general. Where a participant on whose behalf a section 403(b) annuity contract is purchased is in control of any employer for a limitation year as defined in paragraph (f)(2)(ii) of this section (regardless of whether the employer controlled by the participant is the employer maintaining the section 403(b) annuity contract), the annuity contract for the benefit of the participant is treated as a defined contribution plan maintained by both the controlled employer and the participant for that limitation year. Accordingly, where a participant on whose behalf a section 403(b) annuity contract is purchased is in control of any employer for a limitation year, the section 403(b) annuity contract is aggregated with all other defined contribution plans maintained by that employer. In addition, in such a case, the section 403(b) annuity contract is aggregated with all other defined contribution plans maintained by the employee or any other employer that is controlled by the employee. Thus, for example, if a doctor is employed by a non-profit hospital to which section 501(c)(3) applies and which provides him with a section 403(b) annuity contract, and the doctor also maintains a private practice as a shareholder owning more than 50 percent of a professional corporation, then any qualified defined contribution plan of the professional corporation must be aggregated with the section 403(b) annuity contract for purposes of applying the limitations of section 415(c) and § 1.415(c)-1. For purposes of this paragraph (f)(2), it is immaterial whether the section 403(b) annuity contract is purchased as a result of a salary reduction agreement between the employer and the participant.
      2. (ii)Determination of when a participant is in control of an employer. For purposes of paragraph (f)(2)(i) of this section, a participant is in control of an employer for a limitation year if, pursuant to § 1.415(a)-1(f)(1) and (2), a plan maintained by that employer would have to be aggregated with a plan maintained by an employer that is 100 percent owned by the participant. Thus, for example, if a participant owns 60 percent of the common stock of a corporation, the participant is considered to be in control of that employer for purposes of applying paragraph (f)(2)(i) of this section.
    3. (3)Aggregation of section 403(b) annuity with qualified plan of controlled employer. If a section 403(b) annuity contract is aggregated with a qualified plan of a controlled employer in accordance with paragraph (f)(2) of this section, the plans must satisfy the limitations of section 415(c) both separately and on an aggregate basis. In applying separately the limitations of section 415 to the qualified plan and to the section 403(b) annuity contract, compensation from the controlled employer may not be aggregated with compensation from the employer purchasing the section 403(b) annuity contract (that is, without regard to § 1.415(c)-2(g)(3)).
  7. (g)Multiemployer plans
    1. (1)Multiemployer plan aggregated with another multiemployer plan. Pursuant to section 415(f)(3)(B), multiemployer plans, as defined in section 414(f), are not aggregated with other multiemployer plans for purposes of applying the limits of section 415.
    2. (2)Multiemployer plan aggregated with other plan
      1. (i)Aggregation only for benefits provided by the employer. Notwithstanding the rule of § 1.415(a)-1(e), a multiemployer plan, as defined in section 414(f), is permitted to provide that only the benefits under that multiemployer plan that are provided by an employer are aggregated with benefits under plans maintained by that employer that are not multiemployer plans. If the multiemployer plan so provides, then, where an employer maintains both a plan which is not a multiemployer plan and a multiemployer plan, only the benefits under the multiemployer plan that are provided by the employer are aggregated with benefits under the employer's plans other than multiemployer plans (in lieu of including benefits provided by all employers under the multiemployer plan pursuant to the generally applicable rule of § 1.415(a)-1(e)).
      2. (ii)Exception from aggregation for purposes of applying section 415(b)(1)(B) compensation limit. Pursuant to section 415(f)(3)(A), a multiemployer plan, as defined in section 414(f), is not aggregated with any other plan that is not a multiemployer plan for purposes of applying the compensation limit of section 415(b)(1)(B) and § 1.415(b)-1(a)(1)(ii).
  8. (h)Special rules for aggregating certain plans, etc. If a plan, annuity contract or arrangement is subject to a special limitation in addition to, or instead of, the regular limitations described in section 415(b) or (c), and is aggregated under this section with a plan which is subject only to the regular section 415(b) or (c) limitations, the following rules apply:
    1. (1)Each plan, annuity contract or arrangement which is subject to a special limitation must meet its own applicable limitation and each plan subject to the regular limitations of section 415 must meet its applicable limitation.
    2. (2)The limitation for the aggregated plans is the larger of the applicable limitations for the separate plans.
      1. (i)[Reserved]
  9. (j)Examples. The following examples illustrate the rules of this section. Except to the extent otherwise stated in an example, each entity is not and has never been affiliated with another entity under the employer affiliation rules of § 1.415(a)-1(f)(1) and (2), each entity has never maintained a qualified plan (other than the plans specifically mentioned in the example), and the limitation year for each qualified plan is the calendar year.