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What is the difference between solo 401k sole proprietor and S-Corp?
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1 Reply
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Here are the key differences between a Solo 401k for a sole proprietor versus an S-corporation:
Contribution Calculation:
For a sole proprietor, Solo 401k contributions are based on the net profit reported on Schedule C (line 31), after subtracting half of the self-employment tax.
For an S-corporation, Solo 401k contributions are based on the owner’s W-2 wages from the S-corp. Pass-through income for S-corp shareholders is not considered earned income for Solo 401k purposes.
Contribution Limits:
Sole proprietors and S-corp owners can both contribute up to $69,000 for 2024 (or $76,500 if age 50 or older).However, the actual amount may differ based on the net profit (sole proprietor) or W-2 wages (S-corp) of the individual.
Eligibility:
Both sole proprietors and S-corps can open a Solo 401k as long as they have no full-time W-2 employees other than the owner(s).
For an S-corp with multiple owners, each owner must own greater than 2% of the outstanding stock to be eligible for the Solo 401k.
Business Structure:
A sole proprietor does not need to form a specific business entity to open a Solo 401k.
An S-corp is a formal business structure that requires incorporation and has specific tax treatment.Changing Business Structure:
If a sole proprietor later incorporates as an S-corp, the Solo 401k plan documents can be updated to reflect the new business structure without impacting the accounts and investments.
Contributions would then be based on W-2 wages from the S-corp instead of Schedule C net profit.So in summary, while both sole proprietors and S-corps can have a Solo 401k, the contribution calculations, business structure, and some eligibility factors differ between the two. The choice of entity impacts how contributions are determined and reported, but both allow for high contribution limits and investment flexibility.
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