Solo 401k Contribution Calculations
(Calculations for a sole proprietorship, partnership or a LLC taxed as a sole proprietorship)

Salary Deferral Contribution
Although the term salary deferral is used, these businesses do not provide a W-2 salary to the business owner. For businesses of this type, the salary deferral contribution is based on net adjusted business profit. Net adjusted business profit is calculated by taking gross self employment income and then subtracting business expenses and then 1/2 of the self employment tax.In 2008, 100% of net adjusted business profits income up to the maximum of $15,500 or $20,500 if age 50 or older can be contributed in salary deferrals into a Solo 401k.

Profit Sharing Contribution
A profit sharing contribution can be made up to 20% of net adjusted businesses profits. Net adjusted business profit is calculated by taking gross self employment income and then subtracting business expenses and then 1/2 of the self employment tax. You will want to ask your tax professional for assistance with this calculation.

• EXAMPLE 1
  A self employed consultant is age 50 with a sole proprietorship with $50,000 of net income.
  
  $20,500 of salary deferrals + $9,294 profit sharing contribution = $29,794 Total Solo 401k contribution
   
• EXAMPLE 2
  A self employed consultant is age 50 with a sole proprietorship with $100,000 of net income.
  
  $20,500 of salary deferrals + $18,587 profit sharing contribution = $39,087 Total Solo 401k contribution

In the above examples for these type of businesses, salary deferral and profit sharing contributions can generally be tax deductible from personal income.

Summary:

Generous Solo 401k contribution limits and the favorable way the annual contribution is calculated compared to other self employed retirement plans are attractive features of the Solo 401k.

Learn more about the benefits of a Solo 401k.

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Disclosures:

*  The information on this page is for informational purposes only and does not constitute, and should not be construed as, professional, legal or tax advice. To determine your individual tax situation and specific needs, please consult a professional tax advisor.

* Information contained in these sections merely highlight some benefits. There are risks involved with all investments that could include tax penalties and risk/loss of principal.