Key Takeaways
- Common and accepted business expenses.
- Helpful and appropriate for operations.
- Tax-deductible if directly business-related.
- Personal expenses are never deductible.
What is Ordinary and Necessary Expense (O&NE)?
Ordinary and Necessary Expense (O&NE) refers to business costs that are both common and accepted in your industry ("ordinary") and helpful or appropriate for business operations ("necessary"), making them deductible under tax law. These expenses reduce your taxable income by offsetting business revenue but must be directly related to your trade or profession to qualify.
The IRS emphasizes these criteria to distinguish legitimate business expenses from personal spending, aligning with rules applied to entities such as a C corporation.
Key Characteristics
O&NE must meet specific conditions to be deductible. Key traits include:
- Ordinary: Common and accepted in your trade or profession; not unusual or extravagant.
- Necessary: Helpful and appropriate for your business, though not strictly indispensable.
- Directly related: Expenses must be incurred while actively carrying on the business.
- Documented: Proper records and receipts support deductions and reduce audit risk.
- Exclusions: Personal expenses or those unrelated to business activities do not qualify.
How It Works
To claim O&NE deductions, you must ensure expenses occur during your tax year and relate directly to your business operations. The IRS does not provide an exhaustive list, so you justify deductions through documentation and business purpose.
For sole proprietors, these expenses are typically reported on Schedule C, while other business structures like a C corporation have their own reporting forms. Allocating mixed-use expenses, such as home office costs, requires dividing expenses based on the percentage used for business.
Examples and Use Cases
Common examples illustrate what qualifies as O&NE in different industries:
- Airlines: Delta and American Airlines incur ordinary expenses such as fuel, employee wages, and airport fees essential to their operations.
- Software subscriptions: Subscriptions necessary for managing business processes are deductible as they support daily operations.
- Travel costs: Airfare, lodging, and transportation for business trips qualify when traveling away from your tax home.
- Labor-related expenses: Understanding the labor market helps employers determine reasonable employee compensation as an ordinary expense.
Important Considerations
Be mindful that personal expenses, even if paid with business funds, are disallowed. The IRS scrutinizes unusually large or lavish costs to ensure they align with the scale of your business. Careful record-keeping and clear separation of business and personal spending are essential to substantiating deductions.
For managing expenses and credit, consider consulting resources such as best business credit cards to streamline your financial operations while maximizing deductions.
Final Words
Ordinary and necessary expenses must be clearly linked to your business activities and align with industry norms to qualify for tax deductions. Review your expenses carefully and maintain thorough documentation to ensure compliance and maximize your allowable deductions.
Frequently Asked Questions
Ordinary and Necessary Expenses are business costs that are common and accepted in your industry (ordinary) and helpful or appropriate for your business operations (necessary). These expenses are tax-deductible under Section 162(a) of the Internal Revenue Code.
The IRS defines an ordinary expense as one that is normal and widespread within your specific trade or business. It must be a common cost accepted by others in the same industry.
A necessary expense is one that is helpful and appropriate for your business, but it doesn't have to be absolutely essential. It just needs to be useful for carrying out business activities.
No, personal expenses are not deductible as O&NE, even if paid with business funds. The expense must be directly tied to business activities to qualify for a tax deduction.
Common examples include wages and employee compensation, rent or lease payments for business space, interest on business loans, insurance premiums, business software, travel expenses related to business, work uniforms, and home office costs proportional to business use.
You should keep detailed records like receipts and proof of the business purpose for each expense. Proper documentation is essential since the IRS requires justification that the expense is both ordinary and necessary.
Unusually large expenses may not qualify if they are disproportionate to the scale of your business. The IRS and courts look at whether the expense is reasonable and typical within your industry.
Sole proprietors report these expenses on Schedule C (Form 1040), while other business types use their respective tax forms. Mixed-use expenses, like a home office, must be allocated based on the percentage used for business.


