Tax Deduction Calculator · 2026

Section 179 Deduction Calculator 2026

First-year equipment write-off, bonus depreciation, and total tax savings — side by side with straight-line comparison.

Equipment / Asset Cost ($)

Total purchase price including installation and setup

Business Use (%)

Must be >50% to qualify for Sec 179

Asset Type

Total Equipment Placed in Service ($)

All business purchases this year (for phase-out check)

Your Tax Rate (%)

Federal + state combined rate

2026 Deduction Summary

Eligible cost (business-use portion)—

Section 179 deduction—

Remaining basis after Sec 179—

Bonus depreciation (20%)—

Year-1 regular MACRS depreciation—

Total first-year deduction—

Estimated tax savings—

vs. Straight-line (5-yr): year-1 deduction—

Accelerated savings advantage—

Phase-out utilization—

See how this write-off affects your quarterly estimated taxes and annual tax plan.

Quarterly Tax Calculator SE Tax Calculator

Section 179 vs. bonus depreciation: Many business owners combine both to maximize first-year deductions. Section 179 lets you choose which assets to expense; bonus depreciation applies automatically to all qualifying property placed in service during the year. For equipment with high immediate cash needs, Section 179 is taken first — bonus depreciation applies only to the remaining basis. Always confirm your final deduction with a CPA, especially for listed property and vehicles.