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Business taxation

What limitations exist when using Section 179 expenses from an LLC to offset S corporation profits on an individual tax return?

Last updated: 
Sep 2025
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Answer

When using Section 179 expenses from an LLC to offset S corporation profits on an individual tax return, several important limitations and rules must be considered. These limitations arise from the interaction of Section 179 with the pass-through nature of both LLCs (taxed as partnerships) and S corporations, as well as the specific requirements of Section 179 itself. Here is a comprehensive analysis:

1. Section 179 Deduction Overview

Section 179 allows taxpayers to elect to expense the cost of qualifying property, rather than depreciate it over time. The deduction is claimed in the year the property is placed in service, subject to certain limitations.

2. Section 179 Deduction Limits (2025)

  • Dollar Limitation: For 2025, the maximum Section 179 deduction is $2,500,000 per taxpayer, per year.
  • Phase-Out Threshold: The deduction is reduced dollar-for-dollar by the amount by which the cost of Section 179 property placed in service during the year exceeds $4,000,000. If the total cost exceeds $6,500,000, no Section 179 deduction is allowed.
  • Business Income Limitation: The Section 179 deduction cannot exceed the taxpayer’s aggregate taxable income from the active conduct of all trades or businesses during the year. Any disallowed amount due to this limitation is carried forward to future years.

3. Pass-Through Entities: LLCs and S Corporations

LLCs Taxed as Partnerships

  • The Section 179 deduction is determined at the entity level (the LLC), subject to the dollar and phase-out limits.
  • The deduction is then allocated to members (partners) and reported on their Schedules K-1.
  • Each member applies the business income limitation at the individual level, aggregating their share of Section 179 from all sources (including S corporations, other partnerships, and sole proprietorships).

S Corporations

  • The S corporation determines its Section 179 deduction at the entity level, subject to the same dollar and phase-out limits.
  • The deduction is allocated to shareholders and reported on their Schedules K-1.
  • Each shareholder applies the business income limitation at the individual level, aggregating their share of Section 179 from all sources.

Aggregation on the Individual Return

  • On the individual tax return, the taxpayer aggregates all Section 179 deductions passed through from all entities (LLCs, S corporations, sole proprietorships) and applies the overall dollar, phase-out, and business income limitations.

4. Key Limitations When Offsetting S Corporation Profits with LLC Section 179 Deductions

A. Dollar and Phase-Out Limits Are Aggregated

  • The Section 179 limits apply to the taxpayer, not to each business separately. If you receive Section 179 deductions from both an LLC and an S corporation, you must aggregate them and apply the $2,500,000 limit and the $4,000,000 phase-out threshold.

B. Business Income Limitation

  • The total Section 179 deduction you can claim (from all sources) cannot exceed your aggregate taxable income from the active conduct of all trades or businesses. This includes wages, salaries, tips, and other earned income, as well as your share of business income from LLCs, S corporations, and sole proprietorships.
  • If your Section 179 deduction exceeds your business income, the excess is carried forward to future years.

C. Passive Activity Limitations

  • If your interest in the LLC or S corporation is considered a passive activity (i.e., you do not materially participate), your ability to use the Section 179 deduction may be limited by the passive activity loss rules under Section 469. Passive losses generally cannot offset non-passive income, such as wages or active business income from other sources.

D. At-Risk Limitations

  • Section 465 limits losses (including Section 179 deductions) to the amount you have at risk in the activity. If your at-risk amount is less than the Section 179 deduction allocated to you, the excess is not currently deductible and is carried forward.

E. Estates and Trusts

  • Estates and trusts cannot claim the Section 179 deduction.

F. Property Must Be Used in an Active Trade or Business

  • Section 179 property must be used more than 50% in an active trade or business. Property used for investment or held for the production of income (not in a trade or business) does not qualify.

G. Recapture Rules

  • If the business use of Section 179 property drops to 50% or less during its recovery period, you must recapture (as ordinary income) the excess Section 179 deduction previously claimed.

5. Ordering Rules and Coordination

  • The Section 179 deduction is applied before bonus depreciation and regular MACRS depreciation.
  • If you have Section 179 deductions from multiple sources, you may allocate the deduction among your businesses, but the total deduction cannot exceed the overall limits.

6. Reporting on the Individual Return

  • Section 179 deductions from LLCs and S corporations are reported on Schedule E and flow to Form 1040.
  • The individual must complete Form 4562 to aggregate all Section 179 deductions and apply the overall limitations.

7. Example

Suppose you are a member of an LLC and a shareholder in an S corporation. The LLC allocates you $100,000 of Section 179 deduction, and the S corporation allocates you $50,000. Your total business income from all sources is $120,000.

  • You may claim up to $120,000 of Section 179 deduction on your individual return (the business income limitation).
  • The remaining $30,000 ($150,000 - $120,000) is carried forward to future years.
  • If you have passive losses or at-risk limitations, these may further restrict your ability to use the deduction in the current year.

8. Summary Table of Key Limitations

Limitation TypeApplies ToHow It Works
Dollar Limit ($2,500,000)AllAggregate all Section 179 deductions from all sources; cannot exceed this limit.
Phase-Out ($4,000,000)AllDeduction reduced dollar-for-dollar for costs above this threshold.
Business Income LimitationAllCannot deduct more than aggregate active business income; excess is carried forward.
Passive Activity LimitationPassiveSection 179 deduction may be limited if activity is passive; cannot offset non-passive income.
At-Risk LimitationAllCannot deduct more than amount at risk in the activity; excess is carried forward.
Estates and TrustsAllCannot claim Section 179 deduction.
Property UseAllMust be used >50% in active trade or business.
RecaptureAllIf business use drops ≤50%, recapture excess deduction as ordinary income.

9. Conclusion

You may use Section 179 expenses from an LLC to offset S corporation profits on your individual tax return, but you must aggregate all Section 179 deductions from all sources and apply the overall dollar, phase-out, and business income limitations at the individual level. Additionally, passive activity and at-risk rules may further limit your deduction. Any excess Section 179 deduction not allowed due to these limitations is carried forward to future years.

If you need more specific guidance based on your facts (e.g., amounts, passive/active status, at-risk basis), please provide additional details.

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