Executive Summary: IRS Form 4562 Purpose
IRS Form 4562 (Depreciation and Amortization) is the mandatory federal tax form used to make Section 179 elections, claim Special Depreciation Allowance (Bonus Depreciation), and report MACRS depreciation for commercial assets placed in service during the tax year. Form 4562 must be attached to your primary business return (Form 1040 Schedule C, Form 1065, Form 1120, or Form 1120-S).
1. Line-by-Line Guide: Form 4562 Part I (Election to Expense Property)
Enter the statutory maximum deduction threshold for 2026: $1,250,000 (adjusted annually for inflation under Rev. Proc. 2024-40). For married filing separately, see special allocation rules.
Enter the total cumulative purchase price of all Section 179 property placed in service during the tax year. If this total exceeds $3,130,000, your allowable Section 179 deduction is reduced dollar-for-dollar on Line 3.
Itemize each qualifying piece of equipment:
• Column (a): Description of property (e.g. "Haas VF-2 CNC Vertical Machining Center").
• Column (b): Total acquisition cost basis (e.g. $115,000).
• Column (c): Elected Section 179 expensing amount (e.g. $115,000).
Enter your aggregate active trade or business taxable income (before the Section 179 deduction). Your allowable deduction on Line 12 cannot exceed Line 11.
Enter the smaller of your calculated deduction (Line 10) or your business income ceiling (Line 11). Carry this amount to your main tax return (e.g., Schedule C Line 13 or Form 1120 Line 20).
If your Section 179 election exceeded your active business income limitation, the disallowed portion is entered on Line 13 and carried forward indefinitely to future tax years under IRC § 179(b)(3)(B).
2. Form 4562 Part II: Line 14 Special Depreciation Allowance
If your equipment spending exceeds the $1,250,000 Section 179 threshold or you elect not to use Section 179, claim Bonus Depreciation under IRC § 168(k) on Line 14 (Special Depreciation Allowance for Qualified Property).
Unlike Section 179, Bonus Depreciation reported on Line 14 is NOT subject to an active business income ceiling and CAN create or increase a Net Operating Loss (NOL), which can offset other corporate income or be carried forward under IRC § 172.
3. Form 4562 Part V: Listed Property & Commercial Vehicles
Vehicles used for both business and personal driving are classified as Listed Property. On Part V Page 2 (Lines 24 through 29), taxpayers must disclose:
- Line 24a: "Do you have evidence to support the business/investment use claimed?" (Must check YES).
- Line 24b: "If 'Yes,' is the evidence written?" (Contemporaneous mileage log required).
- Line 26 Column (c): Business/investment use percentage (must exceed 50% for Section 179).
- Line 26 Column (i): Elected Section 179 cost for the listed vehicle.
Frequently Asked Questions: Form 4562
Can I revoke a Section 179 election on Form 4562 after filing?
Yes. Under Treasury Regulation § 1.179-5, taxpayers can revoke or amend a Section 179 election by filing an amended federal return (e.g. Form 1040-X or Form 1120-X) for the applicable tax year without requiring IRS Commissioner consent.
Do state returns require a separate state depreciation form?
In non-conforming states (such as California, Pennsylvania, and New York), you must attach a state depreciation adjustment form (e.g. California Form FTB 3805P, Pennsylvania Form REV-183, New York Form IT-225) to reconcile federal Form 4562 with state statutory caps.
Generate Your Form 4562 Line Estimates
Use our interactive tax calculator to compute exact Form 4562 Line 1, 6, and 14 outputs for your equipment purchases.
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