Printable Form 2026

IRS Form 15417-B – IRS Forms, Instructions, Pubs 2026

IRS Form 15417-B – IRS Forms, Instructions, Pubs 2026 – In the complex world of tax-advantaged retirement plans, IRS Form 15417-B stands out as a critical tool for organizations maintaining 403(b) plans. Also known as the 403(b) Plan Miscellaneous Provisions Worksheet 4A – Determination of 403(b) Status, this form is essential for plan sponsors seeking IRS approval through the determination letter program.

Whether you’re a nonprofit, public school, or church organization, understanding this worksheet ensures your 403(b) plan complies with federal regulations, protecting its tax-deferred status. In this comprehensive guide, we’ll break down everything you need to know about IRS Form 15417-B, including its purpose, key sections, completion steps, and best practices for 2025 and beyond.

What Is a 403(b) Plan?

Before diving into the form, let’s recap: A 403(b) plan is a retirement savings vehicle for employees of public schools, tax-exempt organizations (like 501(c)(3) nonprofits), and certain ministers. Contributions grow tax-deferred, often through annuities, custodial accounts, or retirement income accounts.

The IRS requires these plans to meet strict qualification standards under Section 403(b) of the Internal Revenue Code. Noncompliance can lead to disqualification, taxes, penalties, and lost benefits for participants.

The IRS Determination Letter Program for 403(b) Plans

The IRS expanded its determination letter program for 403(b) plans in 2022, allowing individually designed plans to apply for formal IRS approval on their form and operation. This program covers:

  • Initial plan determinations
  • Terminating plans
  • Cycle-based updates

Worksheet 4A (Form 15417-B) is one of several worksheets in this process, focusing on miscellaneous provisions. It’s used alongside other forms like Form 15417 (Eligibility) and Form 15417-H (Distributions) to verify compliance.

What Does IRS Form 15417-B Cover?

Revised in April 2023 (and posted December 2024), Form 15417-B is a checklist-style worksheet. Plan administrators mark “Yes,” “No,” or “N/A” for each provision, explaining any “No” answers. A “Yes” typically means compliance; “No” signals issues needing fixes.

The form has four main sections:

I. Terminations

This section ensures smooth plan wind-downs, protecting participants’ benefits.

Key questions include:

  • Does the plan fully vest and distribute benefits upon termination?
  • Can custodial accounts be distributed in-kind (optional but recommended)?
  • Are post-termination contributions restricted for 12 months?
  • Does the plan prohibit contributions if the employer loses eligible status?

Why it matters: Prevents “orphan” plans and ensures tax-deferred treatment post-termination.

II. Rollover Contributions, Exchanges, and Transfers

Rollovers keep retirement savings intact. This section (with ties to Worksheet 15) checks:

  • Acceptance of eligible rollovers, including after-tax and Roth amounts.
  • In-plan Roth rollovers: Only vested amounts; direct rollovers for nondistributable funds.
  • Recontributions for qualified birth/adoption distributions (QBADs), coronavirus, or disaster relief.
  • Plan-to-plan transfers to other 403(b) plans or qualified plans (e.g., for permissive service credit).
  • Contract exchanges within the plan and non-transferability rules.

Pro tip: If your plan accepts Roth rollovers, it must also allow designated Roth elective deferrals.

III. Funding Issues

Contributions must fund compliant investment vehicles:

  • All funds go to annuities, custodial accounts, or 403(b)(9) retirement income accounts.
  • Timely transfers to vendors (reasonable period for administration; immediate for elective deferrals).
  • Investments must meet Reg. §1.403(b)-8 standards.

Key compliance note: Delays in funding can trigger excise taxes.

IV. General Issues

Covers broad protections:

  • Military service (USERRA): Contributions, benefits, and credits per Section 414(u).
  • Asset protection: No diversions except for participants’ exclusive benefit.
  • Domestic relations orders (DROs/QDROs): Treated like qualified plans for churches/governments.

Who Needs to File or Use IRS Form 15417-B?

  • Plan sponsors submitting for a determination letter (Form 5300).
  • Third-party administrators (TPAs) or ERISA counsel reviewing plans.
  • Terminating plans to confirm status.
  • Any 403(b) plan under IRS scrutiny or self-audit.

It’s not for Form 5500 filers but for qualification reviews. Download it directly from the IRS: Form 15417-B PDF.

Step-by-Step: How to Complete Worksheet 4A?

  1. Gather Documents: Plan document, adoption agreement, and prior amendments.
  2. Review Each Item: Reference plan language (e.g., “Plan Reference” column).
  3. Answer Honestly: Use “N/A” sparingly; explain “No” with citations or fixes.
  4. Cross-Reference: See related worksheets (e.g., 15 for rollovers).
  5. Submit with Form 5300: Include explanations for issues.

Common Pitfalls:

  • Missing recontribution rules for QBADs or disasters.
  • Inadequate termination language.
  • Overlooking church plan merger rules.

Benefits of Mastering Form 15417-B

  • IRS Assurance: Reduces audit risk and confirms tax qualification.
  • Participant Protection: Ensures benefits are secure.
  • Efficiency: Streamlines compliance for growing nonprofits.

In 2025, with economic uncertainty, compliant 403(b) plans are more vital than ever for attracting talent.

Conclusion: Secure Your 403(b) Plan Today

IRS Form 15417-B isn’t just paperwork—it’s your roadmap to a rock-solid 403(b) plan. By addressing miscellaneous provisions like terminations, rollovers, and funding, you safeguard tax benefits for employees and your organization.

Ready to review your plan? Download Form 15417-B and consult a benefits expert. Questions? The IRS’s EP Customer Account Services (1-877-829-5500) or a qualified advisor can help.

Last updated: February 2026. Always check IRS.gov for the latest revisions.