Section 179 Deduction: 2026 Limits and Form 4562

For tax years beginning in 2026, the maximum Section 179 deduction is $2,560,000. That limit starts declining dollar for dollar when qualifying property placed in service exceeds $4,090,000. Your usable deduction also depends on the property, business-use percentage, and income limit.

Section 179 reduces taxable income. It is not a cash grant or a dollar-for-dollar tax credit. A $20,000 deduction would reduce federal income tax by $4,400 at a hypothetical 22% marginal rate, before other tax interactions, rather than pay the business $20,000.

Use the limits for the correct tax year

For 2026, $4,200,000 of qualifying property reduces the general limit by $110,000 to $2,450,000 before the income limit. At $6,650,000 or more, the general deduction limit is fully phased out. These calculations concern property placed in service, not simply purchase orders or deposits.

The SUV figure is a Section 179 limit for certain vehicles, not a promise that every business vehicle can be fully deducted. Passenger automobile depreciation limits, vehicle classification, business use, and other depreciation rules can also matter.

Which purchases qualify?

Qualifying property can include purchased new or used machinery, equipment, certain off-the-shelf software, and eligible improvements to nonresidential real property. Land and the ordinary purchase price of a building do not become Section 179 equipment simply because they are used for business. Related-party purchases and property leased to others have additional restrictions.

The property must be used in the active conduct of a trade or business. If it has both business and personal use, business use must exceed 50% in the service year, and only the business portion of cost enters the calculation. A $10,000 item used 70% for business starts with $7,000 of business cost, subject to the remaining limits.

Being purchased is different from being placed in service

Equipment is placed in service when it is ready and available for its intended business use. For a calendar-year business seeking a 2026 deduction, delivery, assembly, and any necessary setup must support that service date within 2026. Paying in December for machinery that becomes usable the following year does not establish a December service date.

Keep the invoice, purchase agreement, financing documents, installation record, and evidence of the service date. For vehicles and other mixed-use property, retain the records establishing business use.

The income limit and carryforward

The deduction is limited by taxable income from the active conduct of trades or businesses, calculated under the Section 179 rules. That calculation can include more than the profit of the business that bought the asset, including qualifying wages and other active business income. Partnerships and S corporations can have limits at both the entity and owner levels.

An elected amount disallowed by the business-income limit can generally carry forward. That does not turn an amount excluded by the general dollar limit or purchase phaseout into the same carryforward. Track the actual disallowed amount on Form 4562.

Make the election on Form 4562

1. List each eligible asset, cost, business-use portion, and placed-in-service date.
2. Apply the correct year's dollar limit and purchase phaseout, then calculate the business-income limit.
3. Complete Part I of Form 4562 and attach it to the appropriate federal tax return. Complete the listed-property sections when required.
4. Keep the election, remaining asset basis, and any income-limited carryforward with your depreciation schedule.

This is a tax-return election, not an SBA application. Your accountant or tax preparer can compare Section 179, bonus depreciation, and regular depreciation for the actual assets and entity structure. State tax treatment can differ from the federal election.

What happens if business use later drops?

If business use falls to 50% or less during the applicable recovery period, part of the Section 179 benefit may have to be recaptured as income. Selling the property can also affect the tax result. Keep the business-use records after the first year rather than treating the original deduction as the end of the paperwork.