Bonus depreciation under IRC Section 168(k) is one of the most powerful tools a business can use to reduce taxable income when purchasing fixed assets like machinery, tractors, or equipment. Electing bonus depreciation in a year when the business already has, or will create, a net operating loss raises a critical question: does this deduction actually help, or does it create unnecessary complexity at the state level?
The answer depends on several factors, including which states the business files in, whether those states conform to federal bonus depreciation rules, and how the resulting NOL carryforward interacts with future tax years. Businesses that fail to consider the full picture risk delayed deductions, surprise state notices, and even penalties. The Internal Revenue Code governs the federal deduction under IRC Section 168(k), but each state sets its own conformity rules on top of that.
Why state conformity matters for bonus depreciation
Not all states follow the federal government’s approach to bonus depreciation, and this inconsistency is the single biggest reason to think carefully before making the election. Some states have historically accepted the federal bonus depreciation deduction in full, while others have decoupled or partially decoupled, and conformity can shift as states respond to new federal law. Several states, including Ohio and North Carolina, have complex add-back requirements that create additional compliance burdens.
These differences mean that a depreciation deduction claimed on the federal return may need to be partially or fully added back on one or more state returns. Some widely used tax software packages do not track these add-backs accurately, which forces practitioners to maintain separate spreadsheets and attach supporting PDF documents to state filings. Skipping this step can result in unwelcome notices from state tax authorities months or years later.
For businesses operating in multiple states, the decision to elect or elect out of bonus depreciation becomes a multi-jurisdictional planning exercise rather than a simple federal tax question. Coordinating that analysis is a core part of our tax advisory services, where the federal election and every affected state filing are evaluated together.
Ohio’s unique bonus depreciation rules explained
Ohio has its own set of rules around bonus depreciation that out-of-state tax preparers, professionals, and taxpayers need to understand clearly. The state does not simply disallow the deduction outright. Instead, it requires businesses to spread the bonus depreciation over multiple years, as detailed in Ohio Revised Code Section 5733.04.
The 5/6 rule: Ohio’s standard recovery period
Under Ohio’s well-known 5/6 rule, a business that does not have a federal net operating loss adds back five-sixths of its federal bonus depreciation and then deducts that added-back amount in equal installments over the following five years. In effect, instead of recovering the full deduction in the year of purchase, the business spreads most of it across several future years. When a federal net operating loss is present, a stricter version applies: the entire amount is added back and recovered one-sixth at a time over six years.
The 3-year rule: a reward for growing Ohio payroll
A lesser-known provision rewards businesses that increase their Ohio employer payroll withholding by at least 10% compared to the previous year. A qualifying business that did not incur a federal net operating loss adds back only two-thirds of the bonus depreciation and recovers it over a shorter three-year window rather than the standard five, effectively accelerating the state-level deduction. This rule gets little attention in practice, but it can be a significant benefit for rapidly growing companies with Ohio employees.
How a net operating loss disqualifies Ohio bonus depreciation
The most consequential Ohio rule applies when a business has a net operating loss on page 1 of the federal return. This includes an NOL created by electing Section 168(k) bonus depreciation on the current year federal return, as well as NOL carryback or NOL carryforward situations.
When a federal net operating loss exists, Ohio does not allow any deduction for bonus depreciation in that tax year. The state requires the entire bonus depreciation amount to be added back and carried forward. Even more critically, prior-year allocations under the 1/6 or 1/3 schedules are also disallowed and must be carried forward to the next year.
If a business has three consecutive years of net operating losses at the federal level, all disallowed bonus depreciation accumulates and remains unused until the federal return shows taxable income. The good news is that Ohio allows a business to deduct all unused disallowed bonus depreciation in the first year that federal taxable income occurs.
A practical example of Ohio’s NOL and bonus depreciation interaction
Consider XYZ Company, which did not qualify for the three-year rule and had the following federal results:
| Year | Federal Taxable Income / (Net Operating Loss) |
| — | — |
| 20×1 | ($10,000) |
| 20×2 | ($20,000) |
| 20×3 | $60,000 |
XYZ Company elected to take bonus depreciation under Section 168(k) as follows:
- Year 20×1: $6,000 in bonus depreciation (allocated at $1,000/year under the 1/6 rule)
- Year 20×2: $12,000 in bonus depreciation (allocated at $2,000/year)
- Year 20×3: $3,000 in bonus depreciation (allocated at $500/year)
Because XYZ had federal net operating losses in years 20×1 and 20×2, Ohio required the company to add back the entire $6,000 and $12,000 of bonus depreciation in those years. In year 20×2, the expected allocation from year 20×1’s depreciation was also disallowed, even though it normally would have been deductible in that year.
In year 20×3, the company finally had federal taxable income, which released the accumulated disallowed depreciation from both previous years. XYZ could deduct three-sixths ($3,000) of year 20×1 depreciation, two-sixths ($4,000) of year 20×2 depreciation, and the normal one-sixth ($500) of year 20×3’s bonus depreciation, for a total permitted deduction of $7,500.
This $7,500 deduction should be supported with an attachment to the Ohio return to avoid a potential notice from the state.
When to elect out of bonus depreciation during an NOL year
Deciding whether to elect out of bonus depreciation in a year with a net operating loss is a strategic tax planning decision that depends on the size of the potential deduction, the states in which the business files, and the business’s income outlook for future years.
There are three key reasons to consider electing out:
1. Reduce the current-year NOL. If the bonus depreciation deduction would create or enlarge a net operating loss, electing out of Section 168(k) could reduce the size of the NOL while preserving additional depreciation deductions for future years when they deliver more value. The IRS explains the federal NOL carryforward mechanics in Publication 536.
2. Avoid state add-back complexity. For businesses filing in non-conforming states like Ohio, electing out eliminates the need for bonus depreciation add-backs in the current tax year. This simplifies compliance and reduces the risk of errors that could trigger state notices.
3. Protect prior-year allocations. In Ohio specifically, creating federal taxable income by electing out of all or part of the current year’s bonus depreciation prevents prior-year bonus deduction allocations from being disallowed. This ensures that scheduled deductions from earlier years continue uninterrupted.
Every taxpayer’s situation is different. The interaction between federal bonus depreciation, state conformity rules, and NOL carryforward provisions requires a careful analysis of the big picture: not just the current year’s federal return, but the multi-year tax position across all jurisdictions.
The bottom line on bonus depreciation and net operating losses
Bonus depreciation under Section 168(k) remains a valuable depreciation deduction for businesses purchasing fixed assets. But taking it in a year with a federal net operating loss can create unintended consequences at the state level, particularly in states like Ohio that disallow the deduction entirely when a federal NOL exists.
Before automatically claiming bonus depreciation, businesses should evaluate whether electing out, either fully or partially, produces a better tax result across all returns being filed. The goal is to maximize total tax savings across years and jurisdictions while avoiding surprise notices and potential penalties from state tax authorities.
Consulting with a qualified tax professional who understands multi-state depreciation rules is essential for making the right decision for your specific circumstances. Our accounting services team can model the federal and state outcomes side by side before you file.
Frequently Asked Questions
Can bonus depreciation create a net operating loss?
Yes, bonus depreciation under Section 168(k) can create or increase a net operating loss on the federal return. The full cost of qualifying assets is deducted in the year placed in service, which can push taxable income below zero. Whether this is advantageous depends on the business’s ability to use the resulting NOL carryforward in future years.
Does Ohio allow bonus depreciation when a business has a federal NOL?
No, Ohio does not allow any bonus depreciation deduction in a tax year when the federal return shows a net operating loss. The state requires the entire amount to be added back and carried forward. Prior-year bonus depreciation allocations under the 1/6 or 1/3 schedules are also disallowed in that year.
What is the difference between the 5/6 rule and the 3-year rule in Ohio?
Under Ohio’s 5/6 rule, a business with no federal net operating loss adds back five-sixths of its federal bonus depreciation and recovers it over the following five years. The 3-year rule is available to businesses that increase their Ohio employer payroll withholding by at least 10% over the previous year; those businesses add back only two-thirds and recover it over three years instead. When a federal net operating loss exists, the full amount is added back and recovered over six years.
Should I elect out of bonus depreciation if my business has an NOL?
Electing out of bonus depreciation during an NOL year can make sense if it reduces the size of the net operating loss, avoids state add-back requirements in non-conforming states, or prevents prior-year depreciation allocations from being disallowed. The right choice depends on your multi-year income projections and the states in which you file.
Which states do not conform to federal bonus depreciation?
Several states do not fully conform to federal bonus depreciation rules. Pennsylvania is a notable example that decouples from the federal allowance and requires the cost to be recovered under its own depreciation rules. Ohio accepts it but requires most of the deduction to be added back and recovered over several future years. Other states like North Carolina have their own complex add-back requirements. Businesses filing in multiple states should check each state’s conformity status before electing bonus depreciation.
How long can disallowed Ohio bonus depreciation be carried forward?
Disallowed bonus depreciation in Ohio carries forward indefinitely until the federal return shows taxable income. In the first year that federal taxable income occurs, Ohio allows the business to deduct all accumulated unused bonus depreciation from prior years. There is no expiration on the carryforward.
