What Are Nondeductible Expenses? Fines, Meals, and Wash Sales

Nondeductible expenses are costs the IRS will not let you subtract from your taxable income, regardless of how ordinary or necessary they seem. The tax code starts from the position that all income is taxable unless a specific provision says otherwise, and the same logic runs in reverse: no expense reduces your tax bill unless a statute explicitly allows it.¹ Some of the disallowed items are obvious, like groceries or a commute. Others surprise people, like the fee you paid to prepare your personal return. Here is what falls outside the deduction rules, and why.

Personal, Living, and Family Costs

The largest bucket of nondeductible spending is simply the cost of running your life. Federal law prohibits deductions for personal, living, or family expenses unless a different section of the code carves out an exception.² Rent, groceries, utilities, household supplies, and basic clothing all count. IRS regulations make the point directly: amounts paid for rent, water, utilities, and domestic services are not deductible even if you sometimes work at home, unless part of the home qualifies as your place of business.³

Commuting sits inside this bucket. Bus fare, subway passes, gas, tolls, and parking at your regular workplace are personal costs. Distance from the office and calls taken during the drive do not change the result. Personal travel gets the same treatment: if the primary purpose of a trip is personal, the travel itself is nondeductible, though legitimate business expenses you incur at the destination can still qualify.⁴

Life insurance premiums are nondeductible when you are, directly or indirectly, a beneficiary of the policy. That holds even if the policy insures a business partner or key employee, because the IRS treats you as a beneficiary whenever the policy protects you from financial loss on that person’s death.⁵

Entertainment, Club Dues, and Half of Business Meals

Business entertainment is a clean no. The code disallows any deduction for expenses related to entertainment, amusement, or recreation, or for any facility used in connection with those activities.⁶ Ballgame tickets, concert seats, and rented sporting suites are all nondeductible, even when real business gets discussed.

Club dues follow the same rule. Membership fees for any club organized for business, pleasure, recreation, or social purposes cannot be deducted. Country clubs, golf clubs, athletic clubs, and business luncheon clubs are all covered.⁶

Business meals are better but not whole. You can deduct 50% of food and beverage costs tied to your business if the meal is not lavish and the taxpayer or an employee is present.⁶ The other half is a nondeductible cost. Narrow exceptions exist for meals provided at company events or required by federal law for vessel crew, but those rarely apply to an ordinary filer.⁷

Fines, Penalties, and Illegal Payments

Any amount paid to a government in connection with a legal violation, or a government investigation into a potential violation, is nondeductible. That covers court judgments, settlements, and voluntary agreements alike.⁸ Traffic tickets, environmental fines, OSHA violations, and large civil settlements all fall in. If penalties were deductible, they would lose their bite.

Restitution and remediation payments are the narrow exception. If a court order or settlement specifically identifies an amount as restitution, property remediation, or a payment to come into compliance with the law, that amount escapes the general disallowance.⁹ The label matters. A lump-sum settlement with no breakdown is generally treated as fully nondeductible.

IRS penalties are also off the table. The late filing penalty alone runs 5% of unpaid tax per month, up to 25%.¹⁰ You owe the penalty and the tax, and neither reduces income.

Bribes and kickbacks to government officials are nondeductible, including payments that violate the Foreign Corrupt Practices Act. The same rule reaches illegal payments to private parties under any federal or generally enforced state law that carries criminal penalties or loss of a business license. Healthcare providers face an additional prohibition: kickbacks, rebates, or bribes tied to Medicare or Medicaid services are always nondeductible.⁸

Businesses trafficking in Schedule I or Schedule II controlled substances face a harsher rule still. No deduction or credit of any kind is allowed for expenses of a drug trafficking business, whether the trafficking violates federal law or state law where it occurs.¹¹ This has hit state-licensed cannabis operations hard: because marijuana remains Schedule I under federal law as of 2026, these businesses cannot deduct rent, payroll, or advertising on their federal returns. Executive orders have signaled intent to reschedule cannabis, but until rescheduling is finalized the prohibition stands.

Political Contributions and Lobbying

Money spent trying to influence elections or legislation is nondeductible. Donations to political candidates, party committees, and campaign organizations do not reduce taxable income for individuals or businesses. Neither does lobbying aimed at federal or state legislators, attempts to influence the public on legislative matters or referendums, or direct communications with executive branch officials meant to shape official actions.¹²

This reaches professional dues too. Certain tax-exempt organizations, including business leagues and social welfare groups, must tell members how much of their dues goes toward lobbying and political spending. That share is nondeductible even when the rest of the dues would qualify as a business expense.¹³

Unreimbursed Employee Expenses, Tax Prep, and Investment Fees

Before 2018, employees could deduct unreimbursed job costs, investment advisory fees, and the price of preparing a personal tax return as miscellaneous itemized deductions subject to a 2% of AGI floor. The Tax Cuts and Jobs Act suspended those deductions from 2018 through 2025, and the One Big Beautiful Bill Act made the elimination permanent starting in 2026.

Unreimbursed employee expenses: tools, uniforms, continuing education, home office costs, and work-related travel that an employer does not reimburse are nondeductible for W-2 employees. Self-employed filers can still deduct these on Schedule C.
Tax preparation fees: the cost of having a professional prepare your personal return (commonly $200 to $800) is nondeductible. Fees for preparing the business portion of a return, such as Schedule C, may still be deductible as a business expense.
Investment expenses: fees paid to financial advisors, safe deposit box rentals, and subscriptions to investment publications are nondeductible for individual investors.

Because the deduction is gone for the foreseeable future, an employer’s accountable plan that reimburses work-related costs is worth more than it used to be. Those reimbursements are not taxable income to you.

Capital Expenditures Are Deferred, Not Lost

Money spent acquiring, improving, or restoring an asset with a useful life beyond the current year cannot be deducted all at once. You capitalize the cost, adding it to the asset’s basis and recovering it through depreciation or when you sell.¹⁴ The line between a deductible repair and a nondeductible improvement matters here. Patching drywall or fixing a leaky faucet maintains the property and is generally deductible for business or rental property. Replacing a roof or building an addition extends the life or increases the value, so those costs must be capitalized.

Hobby Losses

If the IRS treats an activity as a hobby rather than a business, expenses from that activity are capped at the income it produces. All hobby income must be reported, but a hobby cannot generate a net loss on your return.¹⁵

Starting in 2026, the One Big Beautiful Bill Act tightened this further. Even when hobby expenses are otherwise allowable, you can deduct only 90% of them against hobby income. At least 10% of hobby income is taxable no matter what you spent. Someone selling handmade goods at craft fairs and earning $5,000 will owe tax on at least $500 even if actual expenses exceeded $5,000.

The hobby-versus-business call turns on a multi-factor test: whether you keep separate books, how much time you devote to the activity, your history of profits and losses, and whether you depend on the income. A rough rule of thumb: if the activity shows a profit in at least three of the last five years, the IRS presumes it is for profit.¹⁵ A long string of losses combined with personal enjoyment is where questions start.

Wash Sale Losses

Selling a stock or security at a loss and buying a substantially identical one within 30 days before or after the sale triggers the wash sale rule, which disallows the loss. The rule stops taxpayers from harvesting a paper loss while keeping the same investment position.¹⁶

The 30-day window runs in both directions, producing a 61-day blackout. Buying the stock, entering a contract to acquire it, or buying an option on it all count. The disallowed loss is not gone forever: it gets added to the cost basis of the replacement shares, deferring the tax benefit until you eventually sell those shares without triggering another wash sale.¹⁶ It is a common trap for active traders and for anyone tax-loss harvesting in December who reinvests too quickly.

Federal Taxes and the SALT Cap

Federal income taxes cannot be deducted on a federal return. Deducting the tax from the income that produced it would just loop.¹⁷¹⁸ Federal estate, inheritance, and gift taxes are also nondeductible.

Self-employed filers get a partial break: they can deduct the employer-equivalent half of self-employment tax (half of the combined 15.3% rate) as an adjustment to income. The employee half stays nondeductible, and W-2 workers get no deduction for FICA withheld from their paychecks.

State and local taxes are deductible only up to a cap. For 2026, the limit is $40,400 in combined state and local income, sales, and property taxes. Anything above the cap is nondeductible. The cap drops to $10,000 once modified adjusted gross income exceeds $500,000, with a phaseout narrowing the benefit further. Rules vary by filing status, so check current IRS guidance for your situation.

Deductions With Thresholds That Wipe Out the Benefit

Some deductions technically exist but rarely produce a tax benefit because of built-in floors. Medical and dental costs are deductible only to the extent they exceed 7.5% of adjusted gross income. On an AGI of $80,000, the first $6,000 of medical spending produces nothing. For most healthy households the threshold means medical costs are effectively nondeductible in a typical year.

Personal casualty and theft losses work the same way. Starting in 2026 they are no longer limited to federally declared disasters and can include state-declared disaster losses, but they still must clear a per-event floor and a 10% of AGI threshold before any deduction applies.¹⁹ Everyday mishaps like a stolen bicycle or a broken window remain nondeductible.

1
Office of the Law Revision Counsel. 26 U.S.C. 61 – Gross Income Defined
2
Office of the Law Revision Counsel. 26 U.S.C. 262 – Personal, Living, and Family Expenses
3
eCFR. 26 CFR 1.262-1 – Personal, Living, and Family Expenses
4
Internal Revenue Service. Publication 463 (2025), Travel, Gift, and Car Expenses
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eCFR. 26 CFR 1.264-1 – Premiums on Life Insurance Taken Out in a Trade or Business
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Office of the Law Revision Counsel. 26 U.S.C. 274 – Disallowance of Certain Entertainment, Etc., Expenses
7
Internal Revenue Service. Topic No. 511, Business Travel Expenses
8
Office of the Law Revision Counsel. 26 U.S.C. 162 – Trade or Business Expenses
9
Internal Revenue Service. TD 9946 – Denial of Deduction for Certain Fines, Penalties, and Other Amounts
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Internal Revenue Service. Get the Facts About Late Filing and Late Payment Penalties
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Office of the Law Revision Counsel. 26 U.S.C. 280E – Expenditures in Connection With the Illegal Sale of Drugs
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Office of the Law Revision Counsel. 26 U.S.C. 162(e) – Denial of Deduction for Certain Lobbying and Political Expenditures
13
Internal Revenue Service. Nondeductible Lobbying and Political Expenditures Notification and Reporting Requirements
14
Office of the Law Revision Counsel. 26 U.S.C. 263 – Capital Expenditures
15
Office of the Law Revision Counsel. 26 U.S.C. 183 – Activities Not Engaged in for Profit
16
Office of the Law Revision Counsel. 26 U.S.C. 1091 – Loss From Wash Sales of Stock or Securities
17
Office of the Law Revision Counsel. 26 U.S.C. 275 – Certain Taxes
18
Internal Revenue Service. Topic No. 751, Social Security and Medicare Withholding Rates
19
Internal Revenue Service. Casualty Loss Deduction Expanded and Made Permanent