What Are Personal Expenses? Definition, Deductions, and Exceptions

Personal expenses are the everyday costs of living — housing, food, clothing, commuting, entertainment, personal care — that aren’t tied to earning income through a business or investment. Under federal tax law, personal expenses are generally not deductible. Congress has carved out specific exceptions for costs it wants to encourage or subsidize, such as mortgage interest, charitable giving, and certain medical bills, but the default rule is that you pay for your life with after-tax dollars.¹

What Counts as a Personal Expense

Housing is the biggest one for most households. Rent, mortgage payments, utilities, property taxes, and homeowner’s insurance all sit in the personal column when the home is used only as a residence. Even the first phone line to your home is treated as personal under federal law, no matter how many work calls you take on it.¹

Food and clothing follow the same logic. Groceries and restaurant meals are personal no matter how necessary they feel. Clothing stays personal even when you wear it exclusively for work, as long as it could pass as everyday wear. A surgeon’s scrubs may qualify as a deductible uniform; a suit you bought for the office does not, because you could wear it to dinner.

Commuting, personal errands, streaming subscriptions, vacation travel, gym memberships, and haircuts all land in the same category. The IRS doesn’t care whether the spending feels essential to you. If it supports your life rather than generating income, it’s personal.

Why You Usually Can’t Deduct Them

The rule is short and blunt: no deduction is allowed for personal, living, or family expenses unless a specific provision in the tax code says otherwise.¹ That means the burden falls on you to prove an expense fits one of the exceptions. If you claim a personal cost as a business deduction and can’t back it up, the IRS can reclassify it and charge you additional tax plus interest.

The Exceptions That Are Deductible

Several categories of personal spending do qualify for a deduction if you itemize on Schedule A. Even if you currently take the standard deduction, these matter, because one expensive year — a surgery, a home purchase, a large charitable gift — can push your itemized total past the standard amount.

Medical and Dental Expenses

You can deduct unreimbursed medical and dental costs that exceed 7.5% of your adjusted gross income.² The threshold is steep. If your AGI is $80,000, only costs above $6,000 count. This one matters most in years with a major procedure, expensive ongoing treatment, or high insurance premiums paid out of pocket.

Mortgage Interest

Interest on mortgage debt used to buy, build, or substantially improve your primary home or a second home is deductible if you itemize. For mortgages taken out after December 15, 2017, the deduction applies to the first $750,000 of debt ($375,000 if married filing separately). Older mortgages may qualify under the previous $1 million cap.³

State and Local Taxes

The deduction for state and local taxes, commonly called SALT, covers state income or sales taxes plus local property taxes. The One Big Beautiful Bill Act raised the SALT cap from $10,000 to $40,000 for tax years 2025 through 2029, with a phaseout for high-income households. This helps homeowners in high-tax states who were previously locked into the $10,000 ceiling.

Charitable Contributions

Cash donations to qualifying public charities are deductible up to 60% of your AGI.⁴ Donations of appreciated property follow different, lower limits. You need written acknowledgment from the charity for any single gift of $250 or more, and you must itemize to claim the deduction.

Student Loan Interest

Up to $2,500 in student loan interest is deductible as an adjustment to income, so you can claim it even if you take the standard deduction.⁵ The deduction phases out at higher income levels, with thresholds adjusted annually for inflation.

Educator Expenses

Eligible K–12 teachers can deduct up to $300 in unreimbursed classroom supplies as an adjustment to income, without itemizing.⁶ The limit is per teacher, so a married couple who both teach can deduct up to $600 combined.

New Temporary Deductions for 2025 Through 2028

The One Big Beautiful Bill Act introduced three temporary deductions for costs that were previously nondeductible personal expenses.⁷ All three are available whether you itemize or take the standard deduction, and all three expire after the 2028 tax year unless Congress extends them.

Tips. Employees and self-employed workers in tipped occupations can deduct up to $25,000 in qualified tips. The deduction phases out above $150,000 in modified AGI ($300,000 for joint filers).
Overtime pay. The premium portion of overtime compensation required by the Fair Labor Standards Act is deductible up to $12,500 ($25,000 for joint filers), with the same income phaseouts.
Auto loan interest. Interest on a loan used to buy a vehicle for personal use is deductible up to $10,000 per year, subject to income phaseouts. Lease payments do not qualify.

Standard Deduction vs. Itemizing

Most taxpayers take the standard deduction because it beats the total of their itemizable expenses. For 2026, the amounts are $16,100 for single filers and married filing separately, $32,200 for married couples filing jointly, and $24,150 for head of household.⁸

Itemizing only helps when your combined deductible personal expenses — mortgage interest, SALT, medical costs above the threshold, charitable giving — add up to more than your standard deduction. If your total comes to $14,000 and you file as single, the standard deduction saves you more. But in a year with a home purchase, big charitable donations, or a medical emergency, run the numbers both ways.

When an Expense Is Partly Personal, Partly Business

The trickiest personal expenses aren’t the purely personal ones. They’re the costs that serve both your personal life and a business or side income. The IRS expects you to split these with documentation that holds up to scrutiny.

Home Office

If you use part of your home regularly and exclusively as your principal place of business, you can deduct a portion of your housing costs.⁹ The key word is “exclusively.” A kitchen table where you also eat dinner doesn’t count. You need a dedicated space, even if it’s a corner of a room, used only for work.

There are two ways to calculate the deduction. The regular method compares the square footage of your workspace to the total area of your home, then applies that percentage to actual expenses like rent, mortgage interest, utilities, and insurance.¹⁰ If your office is 200 square feet in a 1,600-square-foot home, 12.5% of those costs become deductible. The simplified method skips the math and gives you $5 per square foot, up to a maximum of 300 square feet or $1,500.¹¹

One detail catches people off guard. W-2 employees generally cannot claim the home office deduction, even if they work from home every day. It’s available to self-employed individuals and independent contractors.

Vehicle Use

When you use the same car for personal errands and business driving, you need to separate the two. The IRS requires a contemporaneous log that records the date, destination, business purpose, and miles driven for each trip.¹² You also need total miles for the year to calculate a business-use percentage. Your daily commute between home and a regular workplace counts as personal, not business.

For 2026, the standard mileage rate for business driving is 72.5 cents per mile. For deductible medical travel, the rate is 20.5 cents per mile.¹³ Without a detailed mileage log, the entire vehicle expense can be reclassified as personal.

Hobby Income

If you earn money from an activity the IRS considers a hobby rather than a business, the income is taxable but the related expenses are not deductible.¹⁴ The worst outcome is paying tax on the revenue while being denied deductions for the costs, leaving you taxed on gross receipts instead of profit.

What Happens If You Get It Wrong

Claiming personal costs as business deductions increases your audit risk and can trigger the accuracy-related penalty, which adds 20% on top of any tax you underpaid.¹⁵ You’ll also owe interest on the unpaid balance, calculated from the original due date of the return.

Intentional misrepresentation is a different category. Tax evasion is a felony carrying a fine of up to $100,000 and up to five years in prison.¹⁶ The line between honest mistakes and willful fraud is drawn after the fact by auditors reviewing your records, and sloppy documentation that makes personal expenses look like business costs can create an appearance of intent even when none existed.

Keeping Records to Support Your Deductions

The IRS requires you to keep records supporting any item on your return until the statute of limitations expires. The standard retention period is three years, measured from the filing date or the return’s due date, whichever is later. It stretches to six years if you failed to report income exceeding 25% of the gross income shown on the return, and there’s no time limit at all if you didn’t file or filed a fraudulent return.¹⁷

Property records deserve special attention. Keep the purchase price of your home, improvement receipts, and depreciation schedules until at least three years after you sell or dispose of the property.¹⁰ People frequently toss home improvement receipts after a renovation, then can’t establish their cost basis when they sell years later. That oversight can mean paying capital gains tax on money you actually spent.

The simplest way to avoid a classification mess is to keep personal and business spending in separate accounts from the start. A dedicated checking account and credit card for business purchases means you never have to untangle mixed transactions at tax time. For mixed-use expenses that can’t be fully separated at purchase, like a phone bill or internet, log the business percentage each month as you go. Records created at the time of the expense carry far more weight than records reconstructed from memory in April.

1
Office of the Law Revision Counsel. 26 U.S.C. 262 – Personal, Living, and Family Expenses
2
Internal Revenue Service. Topic No. 502, Medical and Dental Expenses
3
Internal Revenue Service. Publication 936, Home Mortgage Interest Deduction
4
Internal Revenue Service. Publication 526, Charitable Contributions
5
Internal Revenue Service. Topic No. 456, Student Loan Interest Deduction
6
Internal Revenue Service. Topic No. 458, Educator Expense Deduction
7
Internal Revenue Service. One, Big, Beautiful Bill Act: Tax Deductions for Working Americans and Seniors
8
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
9
Office of the Law Revision Counsel. 26 U.S.C. 280A – Disallowance of Certain Expenses in Connection With Business Use of Home
10
Internal Revenue Service. Publication 587, Business Use of Your Home
11
Internal Revenue Service. Simplified Option for Home Office Deduction
12
Internal Revenue Service. Publication 463, Travel, Gift, and Car Expenses
13
Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile
14
Internal Revenue Service. Know the Difference Between a Hobby and a Business
15
Office of the Law Revision Counsel. 26 U.S.C. 6662 – Imposition of Accuracy-Related Penalty on Underpayments
16
Office of the Law Revision Counsel. 26 U.S.C. 7201 – Attempt to Evade or Defeat Tax
17
Internal Revenue Service. How Long Should I Keep Records