Morgan Stanley Solo 401(k) Plans End December 31, 2026: Your Action Plan
Published | Based on the My Solo 401k Financial live webinar of | By George Blower, Retirement Accounts Attorney
Direct Answer
Morgan Stanley Solo 401(k) plan holders must obtain replacement plan documents before . Morgan Stanley is resigning as prototype plan sponsor and will stop maintaining its IRS opinion letter. Accounts are not being closed. Holders may keep their assets at Morgan Stanley and restate the plan with a third-party document provider such as My Solo 401k Financial. Taking no action leaves the plan without a valid adoption agreement.
Key Takeaways
- Morgan Stanley sent a notice on to its VIP Defined Contribution prototype plan sponsors announcing its resignation as prototype sponsor effective .
- After , Morgan Stanley Solo 401(k) sponsors can no longer rely on the Morgan Stanley IRS opinion letter for their plan.
- Plan sponsors who take no action will have their accounts automatically transitioned to a Morgan Stanley RPM account, the account type used for holders who bring their own third-party plan documents.
- The IRS opinion letter is referenced on Form 5500-EZ, which must be filed once total plan assets exceed $250,000.
- Under an RPM account, Morgan Stanley will no longer prepare Form 1099-R, prepare Form 5500-EZ, or provide plan-level compliance oversight.
- Restating the plan with My Solo 401k Financial adds mega backdoor Roth contributions of up to $72,000 for 2026, in-plan Roth conversions, participant loans, and alternative investments, while the assets stay at Morgan Stanley.
- Adopting an auto-enrollment feature makes the self-employed business eligible for $1,500 in tax credits under the SECURE Act — $500 per year for three consecutive years — and this is available to existing plans, not only new ones.
Status: As of , the Morgan Stanley Solo 401(k) prototype plan resignation is an announced and effective corporate decision, communicated to account holders by written notice. It is not a proposal, a rumor, or pending legislation. The resignation takes effect .
Full webinar replay: Morgan Stanley Solo 401(k) plan document resignation and the December 31, 2026 restatement deadline, hosted by George Blower of My Solo 401k Financial.
What should I do if Morgan Stanley is dropping my Solo 401(k) plan?
A Morgan Stanley Solo 401(k) plan holder should obtain restated plan documents from a third-party plan document provider before . The account itself does not need to move. Morgan Stanley is resigning only as the provider of the plan documents, not as the custodian of the assets. Once restated documents are in place, the holder notifies Morgan Stanley, and Morgan Stanley converts the account to RPM non-prototype status.
“The do nothing option is a trap… it addresses the custody, but it does not address the plan document compliance. So without a separate document provider, your plan remains without a valid adoption agreement after… December 31, 2026.”
(11:09 in the webinar)
What did the Morgan Stanley Solo 401(k) notice actually say?
The Morgan Stanley Solo 401(k) notice went to VIP Defined Contribution prototype plan sponsors on . It stated that Morgan Stanley is resigning as prototype sponsor effective . Two things stop on that date. Morgan Stanley stops providing and updating its IRS pre-approved plan documents, and Morgan Stanley stops maintaining the IRS opinion letter that covers those documents.
Why a plan document is not optional paperwork
A Solo 401(k) is a legal entity, structured as a trust, and the plan document is what creates it and defines what it can do. A plan document is also a living document: when the law changes, the document must be amended. The current amendment deadline for SECURE 2.0 is the end of , which is precisely the obligation Morgan Stanley has chosen not to take on for its Solo 401(k) sponsors.
“So a 401(k) plan, it’s a legal entity. It’s technically a trust. And so like any legal entity, the documents… dictate what you can do.”
(4:36 in the webinar)
Why does losing the IRS opinion letter matter?
Every Morgan Stanley Solo 401(k) plan has relied on the Morgan Stanley IRS opinion letter as evidence that the plan document is IRS-approved. After the resignation date, that letter is no longer maintained, and sponsors cannot rely on it. My Solo 401k Financial provides its own IRS opinion letter to every new client as part of the establishment document packet.
“Morgan Stanley is no longer going to provide or update their IRS pre-approved plan documents that govern your 401(k)… And the firm will no longer maintain the IRS opinion letter, the official seal of approval for your plan structure.”
(7:50 in the webinar)
Form 5500-EZ filers face the sharpest exposure
Form 5500-EZ must be filed once the value of the plan exceeds $250,000, and the filing references the plan’s opinion letter. A self-employed business with a Morgan Stanley Solo 401(k) above that threshold can no longer reference the Morgan Stanley opinion letter after the resignation takes effect.
“The compliance risk is definitely highlighted in the context of someone that has to file a 5500-EZ, because that self-employed business can no longer reference that opinion letter…”
(8:08 in the webinar)
Disqualification risk if no action is taken
Important:
A Morgan Stanley Solo 401(k) that is not kept up to date risks plan disqualification. Consequences discussed in the webinar include loss of the deduction for contributions, loss of the ability to roll additional funds into the plan, and potential IRS penalties for non-compliant plan operation.
What is a Morgan Stanley RPM account?
A Morgan Stanley Solo 401(k) holder who takes no action will have the account automatically transitioned to an RPM account. Morgan Stanley already uses this account type for clients who bring their own third-party plan documents — including existing My Solo 401k Financial clients who have held their accounts at Morgan Stanley for years. The transition solves custody. It does not solve documents.
Under RPM status, ongoing duties shift entirely to the plan sponsor. Morgan Stanley will not issue Form 1099-R for the plan, will not prepare Form 5500-EZ, and will not police the account from a plan-compliance perspective.
Example:
A Morgan Stanley Solo 401(k) holder with $310,000 in the plan takes no action. On , the account is an RPM account with no current plan document behind it. The Form 5500-EZ obligation still applies because the balance exceeds $250,000, but there is no opinion letter to reference and no party preparing the form.
Three options for Morgan Stanley Solo 401(k) plan holders
Morgan Stanley Solo 401(k) sponsors have three realistic paths before the deadline. Each carries a different tax and compliance consequence.
Table summary in plain text: Doing nothing converts the account to RPM status but leaves the plan without a valid adoption agreement. Closing the plan triggers either a taxable distribution or a 12-month waiting period after an IRA rollover. Restating with a third-party document provider keeps the assets at Morgan Stanley and restores compliance.
What does restating a Morgan Stanley Solo 401(k) add?
Restating a Morgan Stanley Solo 401(k) onto My Solo 401k Financial documents is not a like-for-like replacement. The restated document permits features that the Morgan Stanley prototype document did not.
Table summary in plain text: Restatement adds mega backdoor Roth contributions of up to $72,000 for 2026, in-plan Roth conversions, participant loans of up to $50,000, alternative investment authority, Form 1099-R and Form 5500-EZ preparation, and eligibility for $1,500 in SECURE Act auto-enrollment tax credits.
Detailed mechanics of the highest-demand feature are covered separately in the guide to the mega backdoor Roth using a Solo 401k plan.
“Our plan will make the self-employed business eligible to claim $1,500 in tax credits… this is not just limited to new plans, but even existing plans, like an existing Morgan Stanley plan that’s upgraded to our plan… that’s $500 per year for three consecutive years.”
(14:02 in the webinar)
Info:
My Solo 401k Financial does not hold or have access to client accounts. Plans are fully portable and can be held at Morgan Stanley, Fidelity, Schwab, Edward Jones, or another bank or brokerage of the client’s choosing.
How to restate a Morgan Stanley Solo 401(k) plan
Restating a Morgan Stanley Solo 401(k) is a four-step process described in the webinar. Documents are prepared the same business day once the application and payment are submitted.
- Apply. Go to mysolo401k.net, click Open Account, then click Solo 401k. The application is ten questions.
- Identify the existing plan. Answer yes to the question about an existing Solo 401(k), indicate it is a Solo 401(k) at Morgan Stanley, and enter the original effective date. That date appears on the current adoption agreement, or Morgan Stanley can supply it in response to a secure message.
- Notify Morgan Stanley. Once the restated documents are issued, tell Morgan Stanley a third-party plan document provider has been engaged so the account can move to RPM non-prototype status.
- Use the new features. The restated plan carries the advanced features and the ongoing compliance support described above.
General background on plan structure and features is available on the Solo 401k plan documents overview from My Solo 401k Financial.
Key Question from Live Webinar
Is Morgan Stanley the only firm exiting Solo 401(k) plan documents?
The Morgan Stanley Solo 401(k) decision is not isolated. Edward Jones reached the same conclusion and will also stop providing Solo 401(k) plan documents, while continuing to open accounts for clients who bring their own third-party documents. In both cases the stated driver appears to be the document amendment work required by SECURE 2.0.
“Morgan Stanley, and they’re not the only ones. Edward Jones also made the same decision to no longer provide Solo 401(k) plan documents… They’re still happy to open up accounts for people that want to have their money there… and bring their own plan documents.”
(20:48 in the webinar)
Definitions
- Prototype plan
- A pre-approved retirement plan document maintained by a financial institution and adopted by many employers, under which the institution handles amendments and holds the IRS opinion letter.
- IRS opinion letter
- A letter from the IRS confirming that the form of a pre-approved plan document meets Internal Revenue Code requirements. It is referenced when filing Form 5500-EZ.
- Restatement
- The adoption of a new, complete plan document for an existing plan, preserving the plan’s original effective date rather than starting a new plan.
- RPM account
- The Morgan Stanley non-prototype account type used for retirement plans whose documents are provided by a third party rather than by Morgan Stanley.
- Form 5500-EZ
- The annual IRS return for a one-participant retirement plan, required once total plan assets exceed $250,000.
- Mega backdoor Roth
- A strategy using voluntary after-tax contributions to a 401(k) that are then converted to Roth, permitted only if the plan document allows both the contributions and the conversion.
Frequently asked questions
What should I do if Morgan Stanley is dropping my Solo 401(k) plan?
Obtain restated plan documents from a third-party provider before . Morgan Stanley is resigning as the plan document sponsor, not closing accounts. Restating preserves the plan’s original effective date, restores a valid IRS opinion letter, and allows the assets to remain at Morgan Stanley under an RPM account.
Is Morgan Stanley closing my Solo 401(k) account?
No. Morgan Stanley is resigning as prototype plan sponsor effective , which ends its role as plan document provider. The brokerage account continues and is transitioned to RPM non-prototype status, the same account type Morgan Stanley already uses for clients with third-party plan documents.
What happens if I do nothing before December 31, 2026?
The account converts automatically to a Morgan Stanley RPM account, but the plan is left without a valid adoption agreement and without an IRS opinion letter to rely on. Risks discussed in the webinar include plan disqualification, loss of the contribution deduction, loss of the ability to roll funds in, and IRS penalties for non-compliant plan operation.
Do I have to move my money out of Morgan Stanley?
No. Restating the plan with a third-party document provider lets the assets and any existing advisor relationship stay at Morgan Stanley. My Solo 401k Financial does not hold or access client accounts, so plans remain portable across Morgan Stanley, Fidelity, Schwab, Edward Jones, and other custodians.
Can I still file Form 5500-EZ without the Morgan Stanley opinion letter?
Form 5500-EZ is required once plan assets exceed $250,000, and the filing references the plan’s opinion letter. After the Morgan Stanley resignation takes effect, that letter can no longer be relied on. Restating onto documents that carry their own IRS opinion letter restores the reference for future filings.
What are the tax consequences of closing my Morgan Stanley Solo 401(k) instead?
Closing the plan requires transferring all assets out. A taxable distribution is a taxable event. Rolling the assets to an IRA avoids immediate tax, but the webinar notes a 12-month waiting period before a new plan can be established after closing the existing one.
This article is based on the live webinar hosted by My Solo 401k Financial. Analysis by George Blower, Retirement Accounts Attorney.
Ready to restate your Morgan Stanley Solo 401(k)?
Restated documents are prepared the same business day. The application is ten questions, your assets stay where they are, and your plan keeps its original effective date.
Educational purposes only:
This content is provided for educational purposes only and should not be construed as tax, legal, or investment advice, nor as a solicitation. Please consult your own tax attorney and financial professional before making any investment or plan decision.
