26 CFR §1.403(b)-4

1. (a)Treatment of contributions in excess of limitations. The exclusion provided under § 1.403(b)-3(a) applies to a participant only if the amounts contributed by the employer for the purchase of an annuity contract for the participant do not exceed the applicable limit under sections 415 and 402(g), as described in this section. Under § 1.403(b)-3(a)(4), a section 403(b) contract is required to include the limits on elective deferrals imposed by section 402(g), as described in paragraph (c) of this section. See paragraph (f) of this section for special rules concerning excess contributions and deferrals. Rollover contributions made to a section 403(b) contract, as described in § 1.403(b)-10(d), are not taken into account for purposes of the limits imposed by section 415, § 1.403(b)-3(a)(9), section 402(g), § 1.403(b)-3(a)(4), and this section, but after-tax employee contributions are taken into account under section 415, § 1.403(b)-3(a)(9), and paragraph (b) of this section.
2. (b)Maximum annual contribution
   1. (1)General rule. In accordance with section 415(a)(2) and § 1.403(b)-3(a)(9), the contributions for any participant under a section 403(b) contract (namely, employer nonelective contributions (including matching contributions), section 403(b) elective deferrals, and after-tax employee contributions) are not permitted to exceed the limitations imposed by section 415. Under section 415(c), contributions are permitted to be made for participants in a defined contribution plan, subject to the limitations set forth therein (which are generally the lesser of a dollar limit for a year or the participant's compensation for the year). For purposes of section 415, contributions made for a participant are aggregated to the extent applicable under sections 414(b), (c), (m), (n), and (o). For purposes of section 415(a)(2), §§ 1.403(b)-1 through 1.403(b)-3, this section, and §§ 1.403(b)-5 through 1.403(b)-11, a contribution means any annual addition, as defined in section 415(c).
   2. (2)Special rules. See section 415(k)(4) for a special rule under which contributions to section 403(b) contracts are generally aggregated with contributions under other arrangements in applying section 415. For purposes of applying section 415(c)(1)(B) (relating to compensation) with respect to a section 403(b) contract, except as provided in section 415(c)(3)(C), a participant's includible compensation (as defined in § 1.403(b)-2) is substituted for the participant's compensation, as described in section 415(c)(3)(E). Any age 50 catch-up contributions under paragraph (c)(2) of this section are disregarded in applying section 415.
3. (c)Section 403(b) elective deferrals
   1. (1)Basic limit under section 402(g)(1). In accordance with section 402(g)(1)(A), the section 403(b) elective deferrals for any individual are included in the individual's gross income to the extent the amount of such deferrals, plus all other elective deferrals for the individual, for the taxable year exceeds the applicable dollar amount under section 402(g)(1)(B). The applicable annual dollar amount under section 402(g)(1)(B) is $15,000, adjusted for cost-of-living after 2006 in the manner described in section 402(g)(4). See § 1.403(b)-5(b) for a universal availability rule that applies if any employee is permitted to have any section 403(b) elective deferrals made on his or her behalf.
   2. (2)Age 50 catch-up
      1. (i)In general. In accordance with section 414(v) and the regulations thereunder, a section 403(b) contract may provide for catch-up contributions for a participant who is age 50 by the end of the year, provided that such age 50 catch-up contributions do not exceed the catch-up limit under section 414(v)(2) for the taxable year. The maximum amount of additional age 50 catch-up contributions for a taxable year under section 414(v) is $5,000, adjusted for cost-of-living after 2006 in the manner described in section 414(v)(2)(C). For additional requirements, see regulations under section 414(v).
      2. (ii)Coordination with special section 403(b) catch-up. In accordance with sections 414(v)(6)(A)(ii) and 402(g)(7)(A), the age 50 catch-up described in this paragraph (c)(2) may apply for any taxable year in which a participant also qualifies for the special section 403(b) catch-up under paragraph (c)(3) of this section.
   3. (3)Special section 403(b) catch-up for certain organizations
      1. (i)Amount of the special section 403(b) catch-up. In the case of a qualified employee of a qualified organization for whom the basic section 403(b) elective deferrals for any year are not less than the applicable dollar amount under section 402(g)(1)(B), the section 403(b) elective deferral limitation of section 402(g)(1) for the taxable year of the qualified employee is increased by the least of—
         1. (A)$3,000;
         2. (B)The excess of—
            1. (1)$15,000, over
            2. (2)The total elective deferrals described in section 402(g)(7)(A)(ii) made for the qualified employee by the qualified organization for prior years; or
         3. (C)The excess of—
            1. (1)$5,000 multiplied by the number of years of service of the employee with the qualified organization, over
            2. (2)The total elective deferrals (as defined at § 1.403(b)-2) made for the employee by the qualified organization for prior years.
      2. (ii)Qualified organization.
         1. (A)For purposes of this paragraph (c)(3), qualified organization means an eligible employer that is—
            1. (1)An educational organization described in section 170(b)(1)(A)(ii);
            2. (2)A hospital;
            3. (3)A health and welfare service agency (including a home health service agency);
            4. (4)A church-related organization; or
            5. (5)Any organization described in section 414(e)(3)(B)(ii).
         2. (B)All entities that are in a church-related organization or an organization controlled by a church-related organization under section 414(e)(3)(B)(ii) are treated as a single qualified organization (so that years of service and any special section 403(b) catch-up elective deferrals previously made for a qualified employee for a church or other entity within a church-related organization or an organization controlled by the church-related organization are taken into account for purposes of applying this paragraph (c)(3) to the employee with respect to any other entity within the same church-related organization or organization controlled by a church-related organization).
         3. (C)For purposes of this paragraph (c)(3)(ii), a health and welfare service agency means—
            1. (1)An organization whose primary activity is to provide services that constitute medical care as defined in section 213(d)(1) (such as a hospice);
            2. (2)A section 501(c)(3) organization whose primary activity is the prevention of cruelty to individuals or animals;
            3. (3)An adoption agency; or
            4. (4)An agency that provides substantial personal services to the needy as part of its primary activity (such as a section 501(c)(3) organization that either provides meals to needy individuals, is a home health service agency, provides services to help individuals who have substance abuse, or provides help to the disabled).
      3. (iii)Qualified employee. For purposes of this paragraph (c)(3), qualified employee means an employee who has completed at least 15 years of service (as defined under paragraph (e) of this section) taking into account only employment with the qualified organization. Thus, an employee who has not completed at least 15 years of service (as defined under paragraph (e) of this section) taking into account only employment with the qualified organization is not a qualified employee.
      4. (iv)Coordination with age 50 catch-up. In accordance with sections 402(g)(1)(C) and 402(g)(7), any catch-up amount contributed by an employee who is eligible for both an age 50 catch-up and a special section 403(b) catch-up is treated first as an amount contributed as a special section 403(b) catch-up to the extent a special section 403(b) catch-up is permitted, and then as an amount contributed as an age 50 catch-up (to the extent the catch-up amount exceeds the maximum special section 403(b) catch-up after taking into account sections 402(g) and 415(c), this paragraph (c)(3), and any limitations on the special section 403(b) catch-up that are imposed by the terms of the plan).
   4. (4)Coordination with designated Roth contributions. See regulations under section 402A for rules for determining whether an elective deferral is a pre-tax elective deferral or a designated Roth contribution.
   5. (5)Examples. The provisions of this paragraph (c) are illustrated by the following examples:
4. (d)Employer contributions for former employees
   1. (1)Includible compensation deemed to continue for nonelective contributions. For purposes of applying paragraph (b) of this section, a former employee is deemed to have monthly includible compensation for the period through the end of the taxable year of the employee in which he or she ceases to be an employee and through the end of each of the next five taxable years. The amount of the monthly includible compensation is equal to one twelfth of the former employee's includible compensation during the former employee's most recent year of service. Accordingly, nonelective employer contributions for a former employee must not exceed the limitation of section 415(c)(1) up to the lesser of the dollar amount in section 415(c)(1)(A) or the former employee's annual includible compensation based on the former employee's average monthly compensation during his or her most recent year of service.
   2. (2)Examples. The provisions of paragraph (d)(1) of this section are illustrated by the following examples:
   3. (3)Disabled employees. See also section 415(c)(3)(C) which sets forth a special rule under which compensation may be treated as continuing for purposes of section 415 for certain former employees who are disabled.
5. (e)Special rules for determining years of service
   1. (1)In general. For purposes of determining a participant's includible compensation under paragraph (b)(2) of this section and a participant's years of service under paragraphs (c)(3) (special section 403(b) catch-up for qualified employees of certain organizations) and (d) (employer contributions for former employees) of this section, an employee must be credited with a full year of service for each year during which the individual is a full-time employee of the eligible employer for the entire work period, and a fraction of a year for each part of a work period during which the individual is a full-time or part-time employee of the eligible employer. An individual's number of years of service equals the aggregate of the annual work periods during which the individual is employed by the eligible employer.
   2. (2)Work period. A year of service is based on the employer's annual work period, not the employee's taxable year. For example, in determining whether a university professor is employed full time, the annual work period is the school's academic year. However, in no case may an employee accumulate more than one year of service in a twelve-month period.
   3. (3)Service with more than one eligible employer
      1. (i)General rule. With respect to any section 403(b) contract of an eligible employer, except as provided in paragraph (e)(3)(ii) of this section, any period during which an individual is not an employee of that eligible employer is disregarded for purposes of this paragraph (e).
      2. (ii)Special rule for church employees. With respect to any section 403(b) contract of an eligible employer that is a church-related organization, any period during which an individual is an employee of that eligible employer and any other eligible employer that is a church-related organization that has an association (as defined in section 414(e)(3)(D)) with that eligible employer is taken into account on an aggregated basis, but any period during which an individual is not an employee of a church-related organization or is an employee of a church-related organization that does not have an association with that eligible employer is disregarded for purposes of this paragraph (e).
   4. (4)Full-time employee for full year. Each annual work period during which an individual is employed full time by the eligible employer constitutes one year of service. In determining whether an individual is employed full-time, the amount of work which he or she actually performs is compared with the amount of work that is normally required of individuals performing similar services from which substantially all of their annual compensation is derived.
   5. (5)Other employees.
      1. (i)An individual is treated as performing a fraction of a year of service for each annual work period during which he or she is a full-time employee for part of the annual work period and for each annual work period during which he or she is a part-time employee either for the entire annual work period or for a part of the annual work period.
      2. (ii)In determining the fraction that represents the fractional year of service for an individual employed full time for part of an annual work period, the numerator is the period of time (such as weeks or months) during which the individual is a full-time employee during that annual work period, and the denominator is the period of time that is the annual work period.
      3. (iii)In determining the fraction that represents the fractional year of service of an individual who is employed part time for the entire annual work period, the numerator is the amount of work performed by the individual, and the denominator is the amount of work normally required of individuals who perform similar services and who are employed full time for the entire annual work period.
      4. (iv)In determining the fraction representing the fractional year of service of an individual who is employed part time for part of an annual work period, the fractional year of service that would apply if the individual were a part-time employee for a full annual work period is multiplied by the fractional year of service that would apply if the individual were a full-time employee for the part of an annual work period.
   6. (6)Work performed. For purposes of this paragraph (e), in measuring the amount of work of an individual performing particular services, the work performed is determined based on the individual's hours of service (as defined under section 410(a)(3)(C)), except that a plan may use a different measure of work if appropriate under the facts and circumstances. For example, a plan may provide for a university professor's work to be measured by the number of courses taught during an annual work period in any case in which that individual's work assignment is generally based on a specified number of courses to be taught.
   7. (7)Most recent one-year period of service. For purposes of paragraph (d) of this section, in the case of a part-time employee or a full-time employee who is employed for only part of the year determined on the basis of the employer's annual work period, the employee's most recent periods of service are aggregated to determine his or her most recent one-year period of service. In such a case, there is first taken into account his or her service during the annual work period for which the last year of service's includible compensation is being determined; then there is taken into account his or her service during his or her next preceding annual work period based on whole months; and so forth until the employee's service equals, in the aggregate, one year of service.
   8. (8)Less than one year of service considered as one year. If, at the close of a taxable year, an employee has, after application of all of the other rules in this paragraph (e), some portion of one year of service (but has accumulated less than one year of service), the employee is deemed to have one year of service. Except as provided in the previous sentence, fractional years of service are not rounded up.
   9. (9)Examples. The provisions of this paragraph (e) are illustrated by the following examples:
6. (f)Excess contributions or deferrals
   1. (1)Inclusion in gross income. Any contribution made for a participant to a section 403(b) contract for the taxable year that exceeds either the maximum annual contribution limit set forth in paragraph (b) of this section or the maximum annual section 403(b) elective deferral limit set forth in paragraph (c) of this section constitutes an excess contribution that is included in gross income for that taxable year. See § 1.403(b)-3(d)(1)(iii) and (2)(i) for additional rules, including special rules relating to contracts that fail to be nonforfeitable. See also section 4973 for an excise tax applicable with respect to excess contributions to a custodial account and section 4979(f)(2)(B) for a special rule applicable if excess matching contributions, excess after-tax employee contributions, and excess section 403(b) elective deferrals do not exceed $100.
   2. (2)Separate account required for certain excess contributions; distribution of excess elective deferrals. A contract to which a contribution is made that exceeds the maximum annual contribution limit set forth in paragraph (b) of this section is not a section 403(b) contract unless the excess contribution is held in a separate account which constitutes a separate account for purposes of section 72. See also § 1.403(b)-3(a)(4) and paragraph (f)(4) of this section for additional rules with respect to the requirements of section 401(a)(30) and any excess deferral.
   3. (3)Ability to distribute excess contributions. A contract does not fail to satisfy the requirements of § 1.403(b)-3, the distribution rules of § 1.403(b)-6 or 1.403(b)-9, or the funding rules of § 1.403(b)-8 solely by reason of a distribution made from a separate account under paragraph (f)(2) of this section or made under paragraph (f)(4) of this section.
   4. (4)Excess section 403(b) elective deferrals. A section 403(b) contract may provide that any excess deferral as a result of a failure to comply with the limitation under paragraph (c) of this section for a taxable year with respect to any section 403(b) elective deferral made for a participant by the employer will be distributed to the participant, with allocable net income, no later than April 15 of the following taxable year or otherwise in accordance with section 402(g). See section 402(g)(2)(A) for rules permitting the participant to allocate excess deferrals among the plans in which the participant has made elective deferrals, and see section 402(g)(2)(C) for special rules to determine the tax treatment of such a distribution.
   5. (5)Examples. The provisions of this paragraph (f) are illustrated by the following examples: