The Power of First-Year Deductions
In the world of tax planning, "a dollar today is worth more than a dollar tomorrow." This is why Section 179 and Bonus Depreciation are two of the most popular strategies for small to mid-sized businesses. Both allow you to bypass the traditional multi-year MACRS schedule and write off a massive portion (or all) of an asset's cost in the very first year.
What is Section 179?
Section 179 is an immediate expense deduction that allows you to deduct the full purchase price of qualifying equipment and software. It was designed specifically to help small businesses grow.
- 2025 Limit: $1,290,000 (indexed for inflation).
- Spending Cap: The benefit begins to phase out if you purchase more than $3,220,000 in equipment.
- Benefit: You can choose exactly which assets to apply it to, down to the dollar.
What is Bonus Depreciation?
Bonus depreciation is another form of accelerated depreciation. Unlike Section 179, it doesn't have a dollar-for-dollar limit, but it typically applies to specific classes of "new" or "used" property with a recovery period of 20 years or less.
The OBBBA Impact: Under previous laws, bonus depreciation was scheduled to drop to 60% in 2024 and 40% in 2025. However, the **One Big Beautiful Bill Act (OBBBA)** permanently restored **100% Bonus Depreciation** for assets placed in service after January 19, 2025.
Key Differences at a Glance
| Feature | Section 179 | Bonus Depreciation |
|---|---|---|
| Annual Limit | $1.29M (2025) | No Dollar Limit |
| Flexibility | Flexible; Choose by Asset | Mandatory for the Asset Class |
| Business Loss | Cannot create a loss | Can create/increase a loss |
| Asset Types | Equipment, Software, QIP | Property < 20-year life |
Which One Should You Choose?
Most tax professionals recommend using **Section 179 first** for its flexibility. Since Section 179 cannot create a business loss (it can only zero out your income), you use it to minimize your tax liability to $0. If you still have equipment costs remaining after reaching the Section 179 limit, you then apply **Bonus Depreciation** to the remainder.
Because Bonus Depreciation *can* create a net operating loss (NOL), it is a powerful tool if you need to carry back a loss to a previous year to get a refund of taxes already paid.
Summary and Recommendations
- Check your spending: If you spend less than $1.29M, Section 179 covers everything.
- Consider profitability: If you are having a "down" year but bought equipment, Bonus Depreciation is your only way to claim a deduction that creates a loss.
- Look at the OBBBA rules: Ensure your equipment was placed in service after January 19, 2025 to qualify for the 100% bonus rate.
Plan Your Tax Strategy
Use our specialized calculators to see the real-world impact of these deductions on your bottom line.
MyDepreciation Editorial Team
Tax & Accounting Experts
Last reviewed: March 2026
Our editorial team includes tax professionals and financial analysts who review every calculator and guide for accuracy. All content is cross-referenced with IRS Publication 946 and current tax legislation.