401(k) glossary

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Testing & compliance

Successor plan rule

Short definition

The successor plan rule stops a 401(k) plan from paying out employee deferrals at termination if the employer maintains another defined contribution plan within 12 months. It prevents ending and restarting a plan to give employees early access to their money.

What the successor plan rule is

Deferrals can normally be paid out only on events such as leaving the company or reaching age 59½. Plan termination is one of those events, but only if the employer does not maintain an “alternative defined contribution plan” at any time from the termination date through 12 months after all assets are paid out. Employee stock ownership plans, SEPs, SIMPLE IRAs, 403(b) and 457 plans do not count. Neither does another plan if fewer than 2% of the terminated plan’s eligible employees are eligible for it.

Why it matters to employers

The rule comes up in three situations: changing providers, mergers and acquisitions, and redesigning a plan. If you want a new provider, convert the plan; do not terminate it. In a stock acquisition the buyer and the target become one employer at closing, so the target’s plan has to be terminated before closing if its employees are to receive distributions.

Example

A company terminates its 401(k) on June 30, pays everyone out by September 30, and wants a new 401(k) on January 1. Because the new plan starts within 12 months of the payout, the terminated plan could not properly distribute deferrals to employees who still work there.

Common mistakes

  • Terminating a plan to “start fresh” with a new provider.

  • Closing an acquisition before the target adopts its termination resolution.

  • Looking only at one company when the rule applies across the whole controlled group.

Sources

eCFR (National Archives): 26 CFR 1.401(k)-1: Certain cash or deferred arrangements (https://www.ecfr.gov/current/title-26/chapter-I/subchapter-A/part-1/section-1.401(k)-1), retrieved 2026-11-11 Internal Revenue Service: Retirement plans FAQs regarding plan terminations (https://www.irs.gov/retirement-plans/retirement-plans-faqs-regarding-plan-terminations), retrieved 2026-11-11

General information, not legal or tax advice.

© 2026 Basic Capital. All rights reserved.

Basic Capital Group, Inc. and its affiliates and subsidiaries (collectively, "Basic Capital") provide this website and its contents for informational and educational purposes only. The information on this website is general in nature and is not intended to address the circumstances of any particular individual or entity.  Nothing on this website constitutes investment, financial, legal, tax, or accounting advice, nor should it be construed as a recommendation or endorsement of any specific investment product, strategy, or service. Basic Capital does not provide legal, tax, or accounting advice. You should consult with your own qualified financial, legal, and tax advisors before making any investment decisions. Our site uses a third party service to match browser cookies to your contact information. We then use another company to send special offers on our behalf.

Recordkeeping Services

Recordkeeping services are provided through Basic Capital Recordkeeping Services LLC, a wholly owned subsidiary of Basic Capital Group, Inc. Unless expressly agreed to in writing, Basic Capital Recordkeeping Services LLC does not act as a fiduciary under the Employee Retirement Income Security Act of 1974, as amended, with respect to any employee benefit plan.

Investment Advisory Services

Investment advisory services are provided through Basic Capital Advisors LLC, a wholly owned subsidiary of Basic Capital Group, Inc. registered with the State of New York as an investment adviser. Registration does not imply a certain level of skill or training. Investing involves risk, including the potential loss of principal. Past performance is not indicative of future results.
Investments in securities are: Not FDIC Insured • Not Bank Guaranteed • May Lose Value.
Neither Basic Capital Advisors LLC nor its affiliates are a registered broker-dealer or engage in securities brokerage activities. Furthermore, Basic Capital Advisors LLC and its affiliates do not act as a broker-dealer.

Basic Capital, 52 Walker Street, 5th Floor, New York, NY 10013 | 888-460-4901

© 2026 Basic Capital. All rights reserved.

Basic Capital Group, Inc. and its affiliates and subsidiaries (collectively, "Basic Capital") provide this website and its contents for informational and educational purposes only. The information on this website is general in nature and is not intended to address the circumstances of any particular individual or entity.  Nothing on this website constitutes investment, financial, legal, tax, or accounting advice, nor should it be construed as a recommendation or endorsement of any specific investment product, strategy, or service. Basic Capital does not provide legal, tax, or accounting advice. You should consult with your own qualified financial, legal, and tax advisors before making any investment decisions. Our site uses a third party service to match browser cookies to your contact information. We then use another company to send special offers on our behalf.

Recordkeeping Services

Recordkeeping services are provided through Basic Capital Recordkeeping Services LLC, a wholly owned subsidiary of Basic Capital Group, Inc. Unless expressly agreed to in writing, Basic Capital Recordkeeping Services LLC does not act as a fiduciary under the Employee Retirement Income Security Act of 1974, as amended, with respect to any employee benefit plan.

Investment Advisory Services

Investment advisory services are provided through Basic Capital Advisors LLC, a wholly owned subsidiary of Basic Capital Group, Inc. registered with the State of New York as an investment adviser. Registration does not imply a certain level of skill or training. Investing involves risk, including the potential loss of principal. Past performance is not indicative of future results.
Investments in securities are: Not FDIC Insured • Not Bank Guaranteed • May Lose Value.
Neither Basic Capital Advisors LLC nor its affiliates are a registered broker-dealer or engage in securities brokerage activities. Furthermore, Basic Capital Advisors LLC and its affiliates do not act as a broker-dealer.

Basic Capital, 52 Walker Street, 5th Floor, New York, NY 10013 | 888-460-4901

© 2026 Basic Capital. All rights reserved.

Basic Capital Group, Inc. and its affiliates and subsidiaries (collectively, "Basic Capital") provide this website and its contents for informational and educational purposes only. The information on this website is general in nature and is not intended to address the circumstances of any particular individual or entity.  Nothing on this website constitutes investment, financial, legal, tax, or accounting advice, nor should it be construed as a recommendation or endorsement of any specific investment product, strategy, or service. Basic Capital does not provide legal, tax, or accounting advice. You should consult with your own qualified financial, legal, and tax advisors before making any investment decisions. Our site uses a third party service to match browser cookies to your contact information. We then use another company to send special offers on our behalf.

Recordkeeping Services

Recordkeeping services are provided through Basic Capital Recordkeeping Services LLC, a wholly owned subsidiary of Basic Capital Group, Inc. Unless expressly agreed to in writing, Basic Capital Recordkeeping Services LLC does not act as a fiduciary under the Employee Retirement Income Security Act of 1974, as amended, with respect to any employee benefit plan.

Investment Advisory Services

Investment advisory services are provided through Basic Capital Advisors LLC, a wholly owned subsidiary of Basic Capital Group, Inc. registered with the State of New York as an investment adviser. Registration does not imply a certain level of skill or training. Investing involves risk, including the potential loss of principal. Past performance is not indicative of future results.
Investments in securities are: Not FDIC Insured • Not Bank Guaranteed • May Lose Value.
Neither Basic Capital Advisors LLC nor its affiliates are a registered broker-dealer or engage in securities brokerage activities. Furthermore, Basic Capital Advisors LLC and its affiliates do not act as a broker-dealer.

Basic Capital, 52 Walker Street, 5th Floor, New York, NY 10013 | 888-460-4901