Before we explore new developments for 2025, 2024 was so chock full of Solo 401(k) developments that it deserves its own rundown. Then we will move onto 2025 Solo 401(k) changes.
Vanguard Out!
Vanguard transferred all of their Solo 401(k) accounts to Ascensus in 2024. Vanguard is now entirely out of the Solo 401(k) business.
The good news for those fond of Vanguard is that the Ascensus Solo 401(k) offers Vanguard mutual funds.
The transition was not entirely smooth. Notably, beneficiary designation forms did not transfer from Vanguard to Ascensus. The Ascensus Solo 401(k) contribution portal is quite different from Vanguard’s and is not intuitive, in my opinion. I did a YouTube video about making contributions to a Solo 401(k) at Ascensus.
I’m not in the business of making generic recommendations about which Solo 401(k) plan provider to use. In my book, I advocate strongly for considering a pre-approved plan (sometimes referred to as a prototype plan). Schwab, Fidelity, and Ascensus are now among the larger providers of pre-approved plans. While I will not provide any plan provider recommendation, I believe Ascensus, Fidelity, and Schwab are all reasonable options to consider.
Solo 401(k)s at Retirement
During 2024 I did a deep-dive on some Solo 401(k) history. The results of that research is a 27 page self-published article concluding that for Schedule C solopreneurs, a Solo 401(k) should survive the solopreneur’s retirement.
One of the implications of that finding is that Solo 401(k)s should qualify for the Rule of 55. However, one must always consult with their own individual plan, as the plan itself must have rules facilitating Rule of 55 distributions.
Doubts About SECURE 2.0
SECURE 2.0 made dozens of changes to retirement account rules. It made what I believe to be rather inconsequential changes to Solo 401(k) planning. Nevertheless, it did change some Solo 401(k) rules.
Based on a court case in federal district court in Texas, the legal foundation of SECURE 2.0 is now shaky. I discussed the situation on YouTube. It will be very interesting to see what the new Administration does with SECURE 2.0 considering that a federal district court judge made a very convincing argument that the passage of the Omnibus bill (which included SECURE 2.0) in December 2022 was not valid.
New Solo 401(k) Employee Contributions Limit for 2025
The IRS announced that for 2025, the employee deferral limit for all 401(k)s, including Solo 401(k)s, will be $23,500.
Solo 401(k) Catch-Up Contributions Limit for 2025
The IRS also announced that for 2025, the normal employee deferrals catch-up contribution limit remains $7,500. As a result, those aged 50 or older can contribute, in employee contributions, a maximum of the lesser of $31,000 ($23,500 plus $7,500) or earned income.
New Solo 401(k) All Additions Limit for 2025
The new all-additions limit for Solo 401(k)s is $70,000 (or earned income, whichever is less). For those aged 50 or older during 2025, the $70,000 number is $77,500 ($70,000 plus $7,500).
New Additional Catch-Up Contributions for Those Aged 60 Through 63
SECURE 2.0 increased the catch-up contribution for those aged 60 through 63 (see page 2087 of this file). In 2025, the catch-up contribution for these people is $11,250, not $7,500. As this is a SECURE 2.0 rule, I believe that Solo 401(k) users should (1) proceed with caution and (2) stay tuned.
Traditional Solo 401(k) Contributions More Attractive Than Ever
I believe traditional Solo 401(k) contributions are now more attractive than ever. Why? The change in tax policy coming with the 2024 Election results.
There’s been plenty of debate: traditional versus Roth. The way to resolve that is to compare today’s marginal tax rate with the tax rate on the income in retirement. Today’s rate is pretty knowable, but tomorrow’s rate isn’t.
That said, we do know that America has a history of standard deductions and graduated progressive tax rates. That, combined with Congress’s political incentives (retirees tend to vote), suggests that retirees will be relatively low taxed in retirement.
Social Security has been a fly in the ointment to that view. Up to 85 percent of Social Security income fills up the standard deduction and lower tax brackets with income. Doesn’t that mean that traditional retirement account withdrawals will be taxed against higher tax brackets?
Starting in 2025, that issue may go away. Eliminating income tax on Social Security was a major promise of the Trump campaign. Considering the GOP majorities in both houses of Congress, the tax on Social Security should be repealed. Stay tuned!
Removing Social Security from taxable income means significant amounts of traditional retirement account withdrawals should be tax free (offset by the standard deduction) or subject to the lower 10 percent and 12 income tax brackets. The possibility of even lighter taxation on traditional retirement account withdrawals makes traditional Solo 401(k) contributions more attractive than ever.
2025 Update to Solo 401(k): The Solopreneur’s Retirement Account
Solo 401(k): The Solopreneur’s Retirement Account explores the nooks and crannies of Solo 401(k)s. On page 16 of the paperback edition, I provide an example of the Solo 401(k) limits for 2022 if a solopreneur makes $100,000 of Schedule C income. Here is a revised version (in italics) of the example (with the footnote omitted) applying the new 2025 employee contribution limit:
Lionel, age 35, is self-employed. His self-employment income (as reported on the Schedule C he files with his tax return) is $100,000. Lionel works with a financial institution to establish his own Solo 401(k) plan and choose investments for the plan. Lionel can contribute $23,500 to his Solo 401(k) as an employee deferral (2025 limit) and can choose to contribute, as an employer contribution, anywhere from 0-20% of his self-employment income.
Lionel’s maximum potential tax-advantaged Solo 401(k) contribution for 2025 is $42,087! That is a $23,500 employee contribution and a $18,587 employer contribution. Note there’s no change in the computation of the employer contribution for 2025 in this example.
On page 18 I provide an example of the Solo 401(k) contribution limits factoring in catch-up contributions. Here’s the example revised for 2025:
If Lionel turned 50 during the year, his limits are as follows:
- Employee contribution: lesser of self-employment income ($92,935) or $31,000: $31,000
- Employer contribution: 20% of net self-employment income (20% X $92,935): $18,587
- Overall contribution limit: lesser of net self-employment income ($92,935) or $77,500: $77,500
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This post is for entertainment and educational purposes only. It does not constitute accounting, financial, legal, investment, or tax advice. Please consult with your advisor(s) regarding your personal accounting, financial, legal, investment, and tax matters. Please also refer to the Disclaimer & Warning section found here.
Do you know if you can select which source of SE income pre-tax elective deferrals count against if you have a Solo 401k that aggregates income from both schedule C income and W-2 wages from an LLC that files taxes as an S corp? It seems like it would be better to count the elective deferrals against the W-2 wages since that wouldn’t negatively impact the QBI deduction like it would for Schedule C income.
Thanks for commenting. I can’t provide specific advice regarding any particular individual situation on the blog, and clearly you have quite an intricate situation.