This legislative proposal, known as the "Small Business Tax Relief Act," introduces several significant changes to the Internal Revenue Code. A primary objective is to provide tax relief for small businesses by establishing a graduated corporate tax rate. Under this new structure, corporations with taxable income not exceeding $5,000,000 would pay an 18 percent rate on their first $400,000 of income, with the standard 21 percent rate applying to income above that threshold.

A major focus of the bill is to address the taxation of "carried interest," which refers to a share of profits from an investment fund paid to the fund's managers. The bill introduces new rules that would generally treat net capital gains from an investment services partnership interest as ordinary income, rather than capital gains. This recharacterization would also apply to gains from the disposition of such interests, ensuring they are taxed at higher ordinary income rates.

The legislation defines an "investment services partnership interest" as an interest in an investment partnership acquired in connection with providing investment management services, such as advising, managing, or arranging financing for assets. It outlines specific criteria for what constitutes an "investment partnership" and "specified assets" to clearly delineate the scope of these new rules. An exception is provided for qualified capital interests, which represent actual capital contributions, ensuring that returns on genuine investments are not recharacterized if certain conditions are met. The bill also targets other income and gains derived from investment management services, treating them as ordinary income if tied to a "disqualified interest."

To enforce these changes, the bill amends existing tax code sections, including Section 751, to treat investment services partnership interests as ordinary income assets. It also specifies that "specified carried interest income" will not be considered qualifying income for publicly traded partnerships, potentially impacting their tax status. Furthermore, the bill imposes a 40 percent penalty on underpayments resulting from attempts to avoid these new rules, making it more difficult to claim reasonable cause for such underpayments.

Crucially, the bill mandates that income and loss from investment services partnership interests be included in the determination of net earnings from self-employment for individuals providing these services. This change would subject such income to self-employment taxes, aligning the tax treatment with other forms of earned income. The existing carried interest provision (Section 1061) is repealed as a conforming amendment.

In addition to these reforms, the bill includes provisions aimed at other taxpayers. It enhances the deduction for self-employment taxes for individuals with adjusted gross income below $400,000, allowing them to deduct three-quarters of their self-employment taxes, up from one-half. Finally, the bill increases the excise tax on corporate stock repurchases from 1 percent to 1.5 percent, aiming to discourage buybacks and encourage investment.