Common Bonus Depreciation Mistakes That Cost Businesses Thousands

Key IRS Concepts: Common Bonus Depreciation Mistakes

Businesses making common bonus depreciation mistakes risk losing significant deductions and triggering IRS audits. Under IRC Section 168(k), bonus depreciation allows businesses to immediately deduct a large percentage of qualifying asset costs — but errors in application can result in costly tax liabilities and penalties.

Common bonus depreciation mistakes affect thousands of businesses annually, leading to underclaimed deductions or IRS compliance issues. Bonus depreciation — a powerful first-year expensing tool — has undergone significant changes under the Tax Cuts and Jobs Act (TCJA). According to the IRS, bonus depreciation dropped from 100% in 2022 to 80% in 2023, 60% in 2024, and continues phasing down through 2027. Misunderstanding these shifts is costing businesses real money. This guide identifies critical mistakes and how to avoid them.

Key IRS Concepts: How Bonus Depreciation Rules Work

Bonus depreciation under IRC Section 168(k) lets businesses deduct a set percentage of qualifying property costs in the year placed in service — rather than depreciating over years. Qualifying property generally includes machinery, equipment, computers, and certain improvements with a recovery period of 20 years or less.

The current phase-down schedule, per IRS guidance:

1. 2022 — 100% deduction
2. 2023 — 80% deduction
3. 2024 — 60% deduction
4. 2025 — 40% deduction
5. 2026 — 20% deduction
6. 2027 — 0% (full phase-out)

Many businesses mistakenly apply the 100% rate past its expiration. According to IRS Publication 946, applying the wrong depreciation percentage directly contributes to return errors flagged during examination.

Bonus vs. Section 179: A Common Confusion

Section 179 and bonus depreciation are often confused. Section 179 has annual deduction caps and cannot create a net operating loss, while bonus depreciation has no deduction cap and can generate losses. Misapplying one in place of the other creates filing inconsistencies that attract IRS scrutiny.

Common Tax Challenges: Eligibility and Timing Errors

The most damaging common bonus depreciation mistakes involve misclassifying assets or missing placed-in-service dates. The IRS requires that property be placed in service during the tax year the deduction is claimed — not simply purchased or ordered.

Frequent eligibility mistakes include:

• Claiming bonus depreciation on real property (buildings generally do not qualify)
• Missing the qualified improvement property (QIP) rules updated by the CARES Act
• Applying bonus depreciation to used property that fails the original-use requirement
• Overlooking the requirement that property must be acquired after September 27, 2017

The Used Property Trap

The TCJA expanded bonus depreciation to used property — but only if the taxpayer or predecessor hasn’t previously used that specific property and didn’t acquire it from a related party. According to Treasury Regulation 1.168(k)-2, violating these acquisition rules is one of the most frequently corrected errors during IRS examination.

Misidentifying used property eligibility can trigger not only repayment of the deduction but accuracy-related penalties under IRC Section 6662 — typically 20% of the underpayment.

Proven Tax Solutions: Fixing Bonus Depreciation Mistakes Before They Escalate

If you’ve already made common bonus depreciation mistakes on filed returns, options exist to correct them without triggering enforcement action. The IRS allows taxpayers to file an amended return (Form 1040-X for individuals or Form 1120-X for corporations) or use a Form 3115 — Change in Accounting Method to correct depreciation errors prospectively.

Steps to address bonus depreciation errors:

1. Conduct a depreciation review with a tax professional
2. Identify years with incorrect deductions or missed assets
3. Determine whether amended returns or Form 3115 applies
4. File corrections proactively before IRS contact

Proactive correction signals good faith and may reduce or eliminate penalties. Waiting for IRS notice eliminates that advantage entirely.

When a Tax Attorney Becomes Necessary

If correcting bonus depreciation mistakes reveals substantial underpayments — particularly exceeding $10,000 — working with a tax debt attorney becomes critical. The IRS can assess civil penalties, impose interest, and in cases of willful misrepresentation, pursue criminal tax fraud charges under IRC Section 7201.

Take Control Now: Resolve Common Bonus Depreciation Mistakes with Expert Help

Unresolved bonus depreciation errors don’t disappear — they compound with IRS interest and penalties. A qualified tax debt attorney can review your depreciation history, identify exposure, and negotiate resolutions that protect your business. Whether through amended filings, penalty abatement, or installment agreements, professional guidance turns costly mistakes into manageable outcomes. Request a free case review today, explore available tax debt relief options, or learn how exclusive tax debt leads connect attorneys with clients who need immediate help.