Can a corporation have a Solo 401k?
Sarah Duran
Published Feb 13, 2026
A profit sharing contribution up to 25% of W-2 earnings can be contributed into a Solo 401k. A business owner is age 35 and the owner of a subchapter S corporation with $50,000 of W-2 earnings in 2021. A business owner is age 50 and the owner of a subchapter S corporation with $100,000 of W-2 earnings in 2021.
Do I need an LLC to open a Solo 401k?
In order to qualify for a solo 401k, self-employment activity is required. Therefore, a self-employed business owner, a partnership, a limited liability company (LLC), or any type of corporation (including a Subchapter S corporation) may adopt a self-directed solo 401k plan.
Can I still open a Solo 401k for 2020?
You can set-up your solo 401(k) after December 31, 2020 and still make 2020 employer contributions. The Secure Act, which went into law last year, allows you to set-up your solo 401(k) by the employer contribution deadline and still make your employer contribution.
What are the rules for a Solo 401k plan?
To qualify for a Solo 401 (k) plan, you need to be self-employed or own your own small business. You cannot have any full-time employees except for a spouse. You can have a part-time employee and still have this plan provided your part-time worker puts in less than 1,000 hours per year, or a little less than 20 hours per week.
Can a Solo 401k be a partnership or a LLC?
Solo 401k LLC and Partnership Contributions. A Limited Liability Company ( LLC) is a very popular business structure. It’s easy to setup and simple to maintain. The owner of the LLC is known as the member. An LLC can be a single-member or multi-member company. Further, the LLC may be taxed as a partnership or taxed as a corporation.
How much can a sole proprietor contribute to a 401k plan?
If operating as a sole proprietor, Ashley would be required to first deduct the $26,000 “employee” contributions, as well as half her self-employment tax from her net business income before calculating the 25% “employer” contribution.
Where do I deposit my Solo 401k contribution?
Write “Solo 401k contribution” in the memo section of the check. Then, deposit the contribution check into your Solo 401k bank or brokerage account. Document your Solo 401k sole proprietorship contribution on your 1040 tax return.