401(k) Plan Sequence Number

Written by True Tamplin, BSc, CEPF® | Reviewed by Editorial Team

Updated on December 13, 2022

A 401(k) plan sequence number is simply the number that the employer assigns to the plan. For example, if the 401(k) plan is the second type of qualified plan that is or has been sponsored by the employer, then its number will be 002. This number is then combined with the employer's tax ID number to make up the whole sequence number.

Retirement plans such as SEP or SIMPLE IRAs should not be included in this numbering sequence, nor should non-qualified plans such as deferred compensation plans, split dollar plans, executive bonus plans or group carve-out plans. Only qualified plans that fall under ERISA guidelines should be included in this sequence.

401(k) Plan Sequence Number FAQs

What is a 401(k) plan?

A 401(k) plan is a retirement plan offered by an employer designed to help employees save for retirement.

What is the 401(k) Plan Sequence Number?

A 401(k) plan sequence number is simply the number that the employer assigns to the plan.

What is the difference between a Roth 401(k) and traditional 401(k)?

With a Roth 401(k), taxes are paid as money is put into the retirement account. With a traditional 401(k), taxes are paid as money is taken out.

Are there other retirement savings plans other than a 401(k) plan?

Alternatives to 401(k) plans include traditional IRAs, Roth IRAs, pension plans (if your employer offers one), and 403(b) retirement plans for employees of non-profit organizations.

About the Author

True Tamplin, BSc, CEPF®

True Tamplin is a published author, public speaker, CEO of UpDigital, and founder of Finance Strategists.

True is a Certified Educator in Personal Finance (CEPF®), author of The Handy Financial Ratios Guide, a member of the Society for Advancing Business Editing and Writing, contributes to his financial education site, Finance Strategists, and has spoken to various financial communities such as the CFA Institute, as well as university students like his Alma mater, Biola University, where he received a bachelor of science in business and data analytics.

To learn more about True, visit his personal website, view his author profile on Amazon, or check out his speaker profile on the CFA Institute website.

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