What Is Qualified Business Income (QBI)?

Qualified Business Income (QBI) is a key concept introduced under the Tax Cuts and Jobs Act (TCJA) of 2017. It plays a significant role in determining tax liability for certain business owners and self-employed individuals. In essence, QBI refers to the net income generated from a qualified trade or business, minus certain deductions. For eligible taxpayers, QBI may qualify for a special tax deduction — commonly referred to as the QBI deduction or Section 199A deduction — that can reduce taxable income by up to 20%.

This provision was designed to create parity between pass-through entities (such as sole proprietorships, partnerships, and S corporations) and traditional C corporations, which received a significant tax rate cut under the same legislation.

What Counts as Qualified Business Income?

Qualified Business Income includes the net amount of income, gain, deduction, and loss connected to a qualified trade or business conducted within the United States. It generally covers income from sole proprietorships, partnerships, S corporations, and certain trusts and estates.

It’s important to understand what is included and excluded. QBI includes:

• Ordinary income from a qualified business
• Business deductions, losses, and certain types of gain

However, it does not include:

• Wages earned as an employee
• Capital gains or losses
• Interest income not properly allocable to a business
• Dividends
• Annuity income (unless connected to the business)
• Income earned outside of the U.S.
• Reasonable compensation paid to S corporation shareholders
• Guaranteed payments to partners in a partnership

This distinction is critical. For example, a freelance graphic designer operating as a sole proprietor may be eligible to deduct up to 20% of their net business income from their taxable income. But if they were classified as an employee, their wages would not qualify.

The QBI Deduction (Section 199A)

The QBI deduction allows eligible taxpayers to deduct up to 20% of their qualified business income from their total taxable income. This deduction is not taken at the business level. Instead, it’s taken on the individual’s tax return, which means it applies after the determination of adjusted gross income (AGI), but before calculating taxable income.

The full deduction is available to many taxpayers, but for others, it may be limited or phased out depending on several factors:

Income Thresholds

The QBI deduction is subject to income limits that affect whether the deduction is reduced, fully allowed, or disallowed for certain businesses. For tax year 2025 (indexed annually for inflation), the thresholds are approximately:

• $197,300 for single filers
• $394,600 for married filing jointly

Above these thresholds, limitations may apply based on:

• The type of business
• Wages paid to employees
• The value of qualified property
• Whether the business is a specified service trade or business (SSTB)

Specified Service Trade or Business (SSTB)

An SSTB is a business that performs services in fields such as health, law, accounting, consulting, athletics, financial services, and other service-based professions where the principal asset is the reputation or skill of its owners or employees.

For taxpayers whose income exceeds the thresholds mentioned earlier, income from an SSTB may not qualify for the QBI deduction at all, or may be partially limited. However, for those below the threshold, SSTB income is treated the same as income from any other qualified trade or business.

Wage and Property Limitations

Once income exceeds the phase-out range, additional tests come into play to determine the allowable deduction. One such test is the wage and qualified property limitation, which restricts the deduction to the greater of:

1. 50% of the W-2 wages paid by the business, or
2. 25% of W-2 wages plus 2.5% of the unadjusted basis immediately after acquisition (UBIA) of qualified property.

This rule was designed to encourage businesses to hire employees or invest in capital assets, and it disproportionately affects businesses that operate with low labor costs or minimal property investment.

Aggregation Rules

In some cases, multiple businesses can be aggregated for QBI purposes, allowing owners to calculate the deduction as if the businesses were one. Aggregation can be beneficial if one business has high wages or property and another has high income but low wages or assets.

To aggregate businesses, certain conditions must be met:

• The same person or group must own a majority interest in each business
• The businesses must have similar products, services, or be part of the same supply chain
• The taxpayer must report the aggregation consistently each year

Aggregation is optional, but when used correctly, it can help optimize the QBI deduction.

Impact on Different Business Structures

The QBI deduction only applies to pass-through entities. Here’s how it affects different business structures:

• Sole Proprietorships: The deduction applies directly to the net income reported on Schedule C.
• Partnerships: Partners receive their share of QBI from the partnership and report it on their individual returns. Guaranteed payments to partners are excluded.
• S Corporations: Shareholders receive QBI in proportion to their ownership. However, salaries paid to shareholders are not included in QBI.
• LLCs: Tax treatment depends on how the LLC is classified (as a disregarded entity, partnership, or S corporation), but in general, QBI rules apply similarly.

C corporations do not qualify for the QBI deduction because they are taxed separately from their owners.

Planning Considerations

Taxpayers can take steps to potentially increase their QBI deduction through careful planning. These strategies include:

• Adjusting the amount of wages paid (especially for S corporations)
• Making capital investments to increase qualified property
• Evaluating entity structure and considering conversion (e.g., sole proprietor to S corp)
• Timing income and deductions to stay below thresholds
• Aggregating businesses when possible

Taxpayers should consult a qualified tax professional to ensure compliance and maximize the benefit, especially given the complexity of the rules.

Expiration and Legislative Outlook

As of now, the QBI deduction is scheduled to sunset after December 31, 2025, unless extended by Congress. This provision was part of the individual tax changes under the TCJA, most of which were temporary. The corporate tax cuts were made permanent, but the QBI deduction was not.

If the deduction expires, pass-through businesses could face higher effective tax rates relative to corporations, potentially reigniting debates around tax reform and business structure.

The Bottom Line

Qualified Business Income represents an important tax concept for self-employed individuals and business owners operating pass-through entities. It can significantly reduce taxable income and lower overall tax liability, but eligibility and deduction amounts depend on many variables, including income levels, business type, employee wages, and property owned.

Given its complexity and temporary nature, business owners should approach QBI with thoughtful planning and up-to-date guidance to ensure they’re getting the full benefit while remaining compliant with IRS rules.