How to name beneficiaries and fund a trust at ShareBuilder 401k

Covers 5 retirement accounts — beneficiaries can be managed online

ShareBuilder 401k

Subsidiary of ShareBuilder Inc.

sharebuilder401k.com
ShareBuilder 401k logo

ShareBuilder 401k Customer Support

Mailing Address

ShareBuilder Advisors, LLC, 801 2nd Ave Suite 1400, Seattle, WA 98104

Plan Sponsor Support
Plan Participant Support
Participant Services

ShareBuilder 401k Customer Support

Mailing Address

ShareBuilder Advisors, LLC, 801 2nd Ave Suite 1400, Seattle, WA 98104

Plan Sponsor Support
Plan Participant Support
Participant Services

Plan Sponsor Support / Participant Services

Mailing Address

ShareBuilder Advisors, LLC, 801 2nd Ave Suite 1400, Seattle, WA 98104

Participant Services
Verified Jul 2026

Who inherits your ShareBuilder 401k retirement retirement accounts is determined by the beneficiary designation on file—not by your will. This makes keeping designations current one of the most important estate planning steps, especially because the choice of beneficiary also affects how inherited distributions are taxed.

ShareBuilder 401k has 5 retirement accounts with different estate transfer rules. Here is how beneficiary designations, trust ownership, and probate apply to each one.

Traditional 401(k) PlanSafe Harbor 401(k) PlanRoth 401(k) PlanSolo 401(k) SaverSolo 401(k) Plus
1
Go to https://myaccount.ascensus.com/sharebuilder401k and log in with your participant credentials
2
Locate the beneficiary designation section in your account settings or profile
3
Add or update primary and contingent beneficiaries, entering each person's full legal name, date of birth, Social Security number, relationship, and percentage allocation
4
If married and designating a non-spouse as primary beneficiary, download and complete the spousal consent form; have it notarized and submit it to ShareBuilder 401k
5
Save and confirm your changes; retain a copy of the confirmation for your records

Required Documents

  • Trust name, date established, and tax ID (EIN or SSN)

Special Requirements

  • Under ERISA, a married participant's spouse is the automatic primary beneficiary of the 401(k) account unless the spouse provides written, notarized consent to name a different beneficiary
  • Solo 401(k) plans covering only the owner with no employees may not be subject to ERISA; the plan document governs beneficiary rules in that case
  • Beneficiary designations should be reviewed and updated after major life events (marriage, divorce, birth of a child)
  • Plan participants can update beneficiary designations at any time through the online participant portal
SimplyTrustSimplyTrust Editorial·

Sources

Data sourced from ShareBuilder 401k primary sources (13 pages reviewed). How we research.

Download these ShareBuilder 401k instructions

Download instructions for the whole estate

A printable PDF with the steps, required documents, and contact details — verified against ShareBuilder 401k primary sources. Bring it to the branch or keep it beside the phone.

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