Section 199A SSTB De Minimis Rule

The Section 199A QBI deduction can reduce taxable income for many pass-through business owners. The catch is that “specified service trades or businesses,” or SSTBs, face extra limits once taxable income reaches certain levels. Many businesses do not fit neatly into one bucket. A firm might sell products or other services and also provide SSTB services during the same year.

Small SSTB activity does not always have to drive the outcome. The SSTB de minimis rule sets a gross receipts test that can determine how the entire trade or business is treated for Section 199A. A small shift in how receipts are classified can change QBI eligibility and the numbers that flow onto IRS forms.

Below is a step-by-step guide to the rule, plus common mistakes that can cause trouble.

SSTB De Minimis Rule: What It Means for Section 199A

A specified service trade or business, also called an SSTB, is a trade or business where the work falls into certain service fields identified in the Section 199A regulations. These fields include health, law, accounting, actuarial science, performing arts, consulting, athletics, financial services, brokerage services, and several other categories described in the regulation. The SSTB label matters because it can limit or eliminate the Section 199A QBI deduction once taxable income goes above the applicable thresholds for the year.

The de minimis rule is a shortcut for mixed businesses. It applies when a trade or business has both SSTB receipts and non-SSTB receipts. The rule tests how much of the business’s gross receipts are tied to SSTB services.

Here is the basic threshold concept:

The impact is all or nothing for that trade or business. If SSTB receipts stay at or below the applicable % threshold, the trade or business is not treated as an SSTB under this rule. 

If SSTB receipts exceed the threshold, the entire trade or business is treated as an SSTB for the year under the regulation. That outcome can affect QBI eligibility and the limitations that apply when completing the Section 199A calculation.

How to Apply the 10% or 5% SSTB De Minimis Test

Step 1 – Calculate Total Gross Receipts for the Trade or Business

Start by defining the trade or business you are testing. The de minimis rule applies at the trade or business level. It does not automatically apply to an entire entity if the entity runs more than one activity.

Next, total the gross receipts for that trade or business for the taxable year. This is the denominator in the % test.

Use a method that matches the business’s books and tax reporting approach. Consistency matters. A shift in how receipts are recorded can change the result.

Remember:

Step 2 – Identify Receipts Attributable to SSTB Services

Identify which receipts are attributable to SSTB services. This is the numerator in the % test.

Mixed businesses often need a clear way to map receipts to service lines. A simple approach is to group receipts by what the customer paid for. Then match each group to either:

Documentation helps because many invoices include bundles. A single customer engagement might include product sales and services. Decide how receipts are assigned and apply that method consistently.

Step 3 – Compare to the Correct Threshold and Determine the Result

Compute the ratio:

SSTB receipts ÷ total gross receipts = SSTB gross receipts percentage

Then compare the result to the correct threshold:

The outcome is a cliff for that trade or business for the year.

That classification can affect whether the Section 199A QBI deduction is available, especially when taxable income is above the SSTB income thresholds for the year.

Common Mistakes and Edge Cases

When One Business Might Be More Than One Trade or Business

The de minimis test applies at the trade or business level. The result can change if activities that look like one company are treated as more than one trade or business for Section 199A purposes.

Hypothetical examples:

IRS guidance often ties the trade or business concept to the Section 162 standard. An activity generally needs a profit motive and regular, continuous operations to qualify as a trade or business. 

Note: Mislabeling the trade or business boundary can cause the wrong de minimis result. It can also create mismatches between accounting records and how items are reported for Section 199A.

Related Party Rules That Can Create an SSTB Portion

The regulations include a rule that can create an SSTB portion even when the activity does not look like an SSTB on its own. This happens when a trade or business provides property or services to an SSTB and there is at least 50% common ownership between them.

In that case, the portion of the non SSTB business that provides property or services to the commonly owned SSTB is treated as a separate SSTB. This rule is a common reason “clean” rental income or management fee income becomes connected to SSTB treatment for Section 199A.

This issue often comes up with owners who run an operating SSTB and also own a separate entity that leases property to it. It can also come up when one entity provides back office services to an SSTB under common ownership.

Where to Self Check on IRS Forms

Two forms are commonly used for the QBI deduction. Form 8995 is the simpler form and is generally used when taxable income is at or below the threshold for the year. Form 8995 A is used for other situations, including when taxable income is above the threshold and limitations apply.

Self check items that commonly catch errors:

Also read: The Ultimate Guide to Qualified Business Income (QBI)

The Bottom Line

Start with clean numbers. Measure total gross receipts for the trade or business. Classify which receipts are attributable to SSTB services using a consistent method. Keep documentation that supports the split.

Next, apply the correct de minimis threshold. Use 10% or 5% based on the gross receipts test. Then complete Form 8995 or Form 8995-A using the IRS instructions. Consistent reporting across records and forms can help reduce filing errors.

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