Section 179 Raised to $2.5M (Phaseout Starts at $4M): Compliance Planning for Equipment Buys

Author: Gloria Liu, CPA ｜ YCL Tax, Accounting & Advisory

Bottom line in one breath

OBBBA (P.L. 119-21) raised the IRC §179 expensing limit to $2.5 million. When the cost of §179 property placed in service in the tax year exceeds $4 million, the limit falls dollar-for-dollar and reaches zero around $6.5 million of placements. The change applies to tax years beginning after December 31, 2024 (calendar-year taxpayers: 2025+). The deduction still cannot exceed taxable income from active trades or businesses (with carryforward), and you must elect it on the return (typically Form 4562). For North Carolina clients, the sharper point is that NC does not match federal dollar limits—large federal §179 often means a state add-back and later recovery. As of September 2026, model both federal and NC books before buying equipment—compliance planning. The already-published 100% bonus depreciation article is cross-referenced only; this pack does not restate it.

Background

After TCJA, §179 limits were inflation-adjusted (roughly ~$1.25M class dollar limit and ~$3.1M class phaseout heading into 2024). OBBBA, signed July 4, 2025, reset the dollar limit to $2.5 million and the investment phaseout threshold to $4 million, with inflation indexing of the new base amounts beginning after 2025. The policy goal is larger same-year expensing for small and mid-size businesses. NCDOR has long stated that NC uses separate dollar and investment limits (its 2024 page shows $25,000 / $200,000), adds back 85% of the federal-vs-NC difference, then allows 20% of that add-back as a deduction in each of the next five years—confirm whether 2025/2026 state limits still match those figures before filing (待核).

Old vs. new

1. Federal dollar limit: Old (inflation-adjusted ~$1.25M class) → new $2.5 million (from 2025 tax years; later inflation figures 待核).

2. Phaseout start: Old (~$3.13M class) → new: reduce the limit dollar-for-dollar once placements exceed $4 million.

3. Full phaseout: Around $6.5 million of §179 property cost → $0 §179 limit for the year.

4. Taxable-income limit: §179 cannot create or increase an overall loss from active businesses (unlike bonus depreciation’s usual loss-allowing profile).

5. vs. 100% bonus: Bonus has its own qualification and election rules (separate published article). The two are often combined, but they are not the same election and neither erases NC add-backs.

6. Property: Generally tangible personal property and certain elected qualified real property used in an active trade or business—placed-in-service timing matters.

7. Vehicles: SUV / certain vehicle §179 sub-limits still apply (inflation-adjusted dollars 待核); business-use % and listed-property logs still matter.

8. North Carolina: State limits are far below federal; owners receiving federal §179 on a K-1 often face NC add-backs—待核 current D-400 / corporate instructions.

Self-check: does this affect you?

1. Your company or Schedule C is buying machinery, computers, furniture, software, or qualifying improvements in 2025/2026 and wants same-year expensing.

2. Related entities’ combined placements approach or exceed $4 million, risking phaseout.

3. You bought a costly SUV/truck and heard “§179 it all” without checking the vehicle sub-limit and business-use %.

4. Federal profit supports a large §179, but the NC return shows a surprise add-back.

5. A partnership/S corp allocated §179 on the K-1, and the owner must apply limits again at the owner level.

Simplified examples (illustration only; ignores bonus elections, state tax, vehicle caps, §280F)

Example A — within federal room: Cary company places $800,000 of qualifying equipment in service in 2025 with ample active business taxable income and elects §179. Illustration: well under $2.5M and $4M → federal expensing of that cost may be available if the property qualifies.

Example B — phaseout: Same year, $4.5 million of §179 property placed in service. Illustration: $500,000 over the $4M threshold cuts the $2.5M limit to about $2.0 million—not the full $2.5M.

Example C — NC add-back (simplified): Federal return takes a large §179; NC still computes a much smaller state-limited amount, adds back 85% of the difference, then allows 20% of that add-back in each of the next five years. Illustration: “fully expensed federally” ≠ same-year NC result—exact state limits and form lines 待核.

Action timeline

1. Before buying: List asset type, expected placed-in-service date, business-use %, and whether a related group might exceed $4M.

2. Model: Run federal §179 vs bonus options and an approximate NC add-back cash-tax view (待核 state limits).

3. Placed-in-service year: Keep invoices and evidence; elect correctly on Form 4562; prepare NC K-1 statements for pass-throughs.

4. Vehicles: Check the current SUV/listed-property dollar cap and mileage logs before locking a §179 amount.

5. Multi-state: Confirm each state’s conformity to federal §179—待核.

What YCL can do

1. Measure federal §179 room, phaseout, and the taxable-income limit against your placement list.

2. Contrast §179 vs bonus at a high level without duplicating the published bonus article.

3. Build NC add-back / five-year recovery workpapers against the latest NCDOR guidance (待核).

4. Review vehicle and listed-property substantiation to reduce exam risk.

5. Bilingual help from Cary (RTP) and Shanghai with CPA Chenchen Liu and Gloria—compliance planning.

FAQ

Q: Can I expense everything up to $2.5 million automatically?

A: No. You still face the $2.5M cap, $4M phaseout, taxable-income limit, property qualification, and any vehicle sub-limits.

Q: If 100% bonus exists, do I still need §179?

A: Often yes as a planning choice—the rules, caps, income limit, and state outcomes differ. See the published bonus article for §168(k); this piece focuses on §179.

Q: Will North Carolina also allow a $2.5 million deduction?

A: Generally not at the federal amount. NC has long used much lower state limits with add-backs—follow current NCDOR instructions (待核).

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Disclaimer

This article is general tax information only and is not tax, legal, or investment advice for any person or business. Application depends on property type, placed-in-service timing, business-use percentage, taxable income, related-group aggregation, and current federal and state law. Follow the latest IRS and NCDOR releases. Items marked 待核 require verification before purchasing or filing. Consult a licensed professional for advice specific to you.