QBI Deduction for LLC Owners 2026: The 20% Pass-Through Tax Break Explained

The QBI Deduction in One Paragraph

Since the 2017 Tax Cuts and Jobs Act, LLC owners and other pass-through business owners can deduct up to **20% of their qualified business income** (QBI) on their personal tax return. For a consultant earning $100K net profit, that's a $20K deduction — reducing federal taxable income to $80K and saving ~$4,800 at the 24% marginal rate.

**But**: the deduction has income phaseouts, W-2 wage tests for high earners, and exclusions for "specified service" businesses like law, medicine, consulting, and finance above certain income thresholds. The rules are complex but the savings are real.

**The deduction sunsets December 31, 2025** — but Congress has repeatedly extended it, and both parties have indicated 2026 extension is likely. Budget on it continuing, but plan for possibility of change.

Who Gets the Deduction

You can claim QBI if:

- You own a **pass-through business**: sole proprietorship, partnership, S-Corp, LLC, or single-member LLC - You're a **US taxpayer** (resident alien or citizen) - Your business produces **qualified business income**: net income from a US-based active trade or business

You CANNOT claim QBI on:

- C-Corp income (corporations already got a rate cut under TCJA) - W-2 employee wages - Investment income (dividends, capital gains, interest) - Foreign-source income - Guaranteed payments to partners - Reasonable compensation paid by an S-Corp to its shareholders

The Income Phaseout Thresholds (2026)

Three income tiers determine how QBI applies to you:

Tier 1: Below the threshold (simple)

For 2026 (tentative indexing): - Single / Head of Household: **~$210,700** - Married Filing Jointly: **~$421,400**

Below these thresholds, you get the full 20% deduction regardless of business type or W-2 wages. This is the simplest case.

Tier 2: In the phaseout range

Single: $210,700 - $260,700 MFJ: $421,400 - $521,400

In this range, the deduction begins phasing out for specified service trades or businesses (SSTBs) and non-SSTB businesses get the W-2 wage / UBIA of property test applied partially.

Tier 3: Above the threshold

Single: above ~$260,700 MFJ: above ~$521,400

Above these thresholds:

- **SSTB owners (doctors, lawyers, consultants, accountants, financial advisors)**: **$0 deduction**. The QBI deduction completely phases out. - **Non-SSTB owners**: deduction limited to the **greater** of (a) 50% of W-2 wages paid by the business, or (b) 25% of W-2 wages + 2.5% of unadjusted basis of qualified property.

What Are "Specified Service Trades or Businesses" (SSTBs)?

SSTBs are businesses whose principal asset is the reputation or skill of 1+ employees or owners. Specific categories:

- **Health**: doctors, dentists, veterinarians, psychologists, nurses, physical therapists - **Law**: lawyers, paralegals, legal services - **Accounting**: CPAs, bookkeepers, tax preparers - **Actuarial science** - **Performing arts**: actors, directors, musicians - **Consulting**: business consultants, management consultants (broadly interpreted) - **Athletics**: professional athletes, coaches - **Financial services**: investment advisors, wealth managers, brokers, insurance agents - **Brokerage services**: real estate agents, real estate brokers (controversial) - **Investing and investment management**

Businesses whose income depends on the owner's skill or reputation generally qualify as SSTB.

**Not SSTB** (and therefore eligible for QBI even at high incomes): manufacturing, real estate rentals, software/SaaS, e-commerce, restaurants, retail, construction, agriculture, publishing.

How to Calculate Your QBI Deduction

Step 1: Calculate Qualified Business Income

For an LLC taxed as disregarded entity (single-member): - QBI = net profit from the business - Subtract half of self-employment tax (which is deductible elsewhere) - Subtract self-employed health insurance premiums - Subtract retirement plan contributions (SEP, Solo 401(k), etc.)

For multi-member LLC (partnership): - QBI = your share of partnership ordinary business income (from K-1 box 1) - Subtract guaranteed payments (these aren't QBI)

For S-Corp: - QBI = your share of ordinary S-Corp income (from K-1 box 1) - W-2 wages you received are NOT QBI (they're wages, not pass-through income)

Step 2: Calculate Tentative Deduction

Tentative deduction = 20% × QBI

Step 3: Apply Income Threshold Test

If taxable income (before QBI) < Tier 1 threshold: full 20% applies, regardless of business type.

If above Tier 3 threshold and you're an SSTB: deduction = $0.

If above Tier 3 threshold and you're not an SSTB: deduction = min(20% × QBI, max(50% × W-2 wages, 25% × W-2 wages + 2.5% × UBIA))

Step 4: Final Cap

Total QBI deduction can't exceed 20% of (taxable income - net capital gains).

Real-World Examples

Example 1: Freelance designer (sole prop / SMLLC)

Julia earns $85K net profit from freelance design. No employees. Single, taxable income $72K.

- QBI = $85K (minus half SE tax, health insurance, retirement — let's say $75K after adjustments) - 20% × $75K = $15,000 - Taxable income ($72K) is below the $210K threshold → no phaseout - Final deduction: **$15,000** - At her 22% marginal rate, saves ~$3,300

Example 2: Law firm partner earning $320K

Mike is a lawyer, so his LLC is an SSTB. Single, taxable income $320K.

- QBI = $320K - 20% × $320K = $64,000 tentative - Taxable income ($320K) is above the Tier 3 threshold ($260K) - Since he's an SSTB above the threshold: **deduction = $0** - Losing ~$15,000 in tax savings because of SSTB rules

Example 3: Software LLC with employees

SaaS LLC earns $500K net profit, pays $200K in W-2 wages to employees. Owner's taxable income $420K (MFJ).

- QBI = $500K - 20% × $500K = $100,000 tentative - MFJ taxable income ($420K) is below Tier 3 threshold ($521K for MFJ) → full deduction applies - Final deduction: **$100,000** - Saves ~$37,000 at their 37% marginal rate

Example 4: Same software LLC if owner earned more

If the same SaaS LLC owner has $650K taxable income (above the $521K MFJ threshold):

- Tentative: 20% × $500K = $100,000 - Non-SSTB, so wage-test applies: - 50% × W-2 wages ($200K) = $100,000 - 25% × $200K + 2.5% × $0 UBIA = $50,000 - Max of these: $100,000 - Final deduction: min($100,000 tentative, $100,000 wage cap) = **$100,000**

Because W-2 wages were high enough, the deduction didn't phase out. For owner-only LLCs with no employees, the wage cap can eliminate the deduction at high incomes.

The UBIA of Property Alternative

UBIA = Unadjusted Basis Immediately After Acquisition. It's the purchase price of depreciable business property (buildings, equipment, etc.) that your business owns.

For real estate investors and asset-heavy businesses, UBIA matters:

- Rental LLC owning a $1M building: UBIA = $1M (the purchase price) - Wage cap: 25% × W-2 wages + 2.5% × $1M = W-2 component + $25,000 - Even with no employees, you get a $25K wage-equivalent cap

This makes QBI valuable for real estate investors with significant property basis.

How to Maximize QBI

Strategy 1: Stay under the income threshold

If you're near the phaseout threshold, consider timing income to stay below: - Defer December invoicing to January - Accelerate deductible expenses into this year - Max out retirement contributions (SEP, Solo 401(k)): $69K for 2026

Strategy 2: S-Corp election to split income

For a sole proprietor SSTB, converting to an S-Corp can help. W-2 salary portion is NOT QBI, reducing your "pass-through" income — but also reducing the income you're testing against SSTB phaseout thresholds. Net effect depends on your numbers.

For non-SSTBs, the W-2 wage test actually makes S-Corp election more valuable for high-income QBI calculations, because W-2 wages paid through the S-Corp count toward the wage cap.

Strategy 3: Hire employees

For non-SSTB high earners, every dollar of W-2 wages paid by your LLC increases your wage cap. A business paying $0 wages has the lowest possible cap; one paying $500K in wages has a cap of $250K (50% × wages).

Strategy 4: Buy depreciable property

Purchasing real estate, heavy equipment, or other qualified property increases your UBIA, increasing your wage cap under the alternative formula. Useful for real estate investors and manufacturers.

Strategy 5: Aggregation for multiple businesses

You can aggregate multiple commonly owned businesses for the QBI wage test, combining their W-2 wages and property basis. Common ownership = 50%+ common ownership of each aggregated business.

This helps owners who have split a single business across multiple LLCs (e.g., an operating LLC that pays wages + a holding LLC that owns the building).

The 2025 Sunset and 2026+

The QBI deduction sunsets December 31, 2025 under the original TCJA. Without Congressional action, 2026 tax year would not include QBI.

Likelihood of extension (based on current legislative momentum as of 2026):

- **High** (both parties support) - Both House and Senate have proposed extensions - "Extended through 2028 or 2030" is the common proposal - Lobbying from small business / accounting groups is intense

Plan conservatively: assume QBI is available for 2025 filings. Watch for 2026 legislative action before making long-term decisions based on QBI continuation.

Common Mistakes

Mistake 1: Not claiming it

Some LLC owners don't realize QBI applies to them. It applies to almost every LLC owner below the income threshold. If you had positive net business income and filed Schedule C, E, or got a K-1 with ordinary business income, calculate QBI.

Mistake 2: Including non-QBI items

Capital gains, dividends, interest, investment income, and W-2 wages from your S-Corp are NOT QBI. Include them in QBI by mistake and the IRS will reassess.

Mistake 3: Applying the SSTB label incorrectly

SSTB rules are narrower than they first appear. A marketing agency might look like "consulting" but actually qualifies as a non-SSTB if it doesn't depend on specific skills. A CPA's practice is definitively SSTB.

If unclear, talk to a CPA. Incorrect classification costs thousands.

Mistake 4: Missing the aggregation opportunity

If you own multiple commonly controlled businesses, aggregating them for QBI purposes can unlock larger deductions. The aggregation election is irrevocable for 5 years, so plan it deliberately.

What to Do Next

Calculate your QBI deduction as part of tax planning — don't wait for April. Work with a CPA familiar with QBI.

If you're near an income threshold, consider tax-timing strategies (retirement contributions, expense timing) to stay below.

[FormifyAI forms your LLC](/sign-up) and connects you to qualified CPAs for tax prep through our partner network. We don't do tax prep ourselves, but we know who does it well for small business LLCs.