Small Business Tax Write‑Offs and Deductions

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Editor’s Note: Updated to reflect current federal small business tax rules for the 2025 tax year. Tax laws change frequently; always consult a tax professional.

Every year at tax time, many small business owners leave money on the table. Sometimes it’s because deductions are overlooked. Other times, it’s because the rules feel complicated or advice found online is outdated.

The good news? With a clear understanding of today’s tax rules and a little organization, you can make more confident decisions and avoid missing deductions and credits your business may be eligible for.

This guide explains what a tax write‑off is, highlights common small business deductions and shares practical tips to help you stay organized when it’s time to file.

What Is a Tax Write‑Off?

A tax write‑off, also called a deduction, is an ordinary and necessary business expense that can be subtracted from your business’s gross income. Deductions reduce your taxable income, which can lower the amount of tax you owe.

In general, the IRS allows businesses to deduct expenses that are:

Ordinary: Common and accepted in your trade or industry
Necessary: Helpful and appropriate for running your business

Understanding which expenses qualify and keeping good records can make a meaningful difference during tax time.

What Can You Write Off on Taxes?

Most businesses can deduct a wide range of expenses tied directly to operating their business. While every situation is different, common deductible expenses often include:

Employee pay and benefits
Rent and utilities
Insurance premiums
Business travel and vehicle expenses
Equipment, technology, and software
Certain taxes, fees, and professional services

Below are some of the most common small business write‑offs owners ask about.

Common Small Business Tax Write‑Offs

Employee Pay and Benefits

Businesses can generally deduct compensation paid to employees for services performed. This includes wages, salaries, bonuses, commissions and paid time off. Many fringe benefits, such as employer‑paid health insurance, certain retirement plan contributions, and educational assistance, may also be deductible when structured properly.

Rent and Utilities

If you lease the space used for your business, rent payments are typically deductible. Utility expenses such as electricity, gas, water, phone service, and internet access may also qualify if they’re related to business use.

For home‑based businesses, a portion of these costs may be deductible depending on how the space is used.

Insurance Premiums

Many types of business insurance are generally deductible, including:

Workers’ compensation insurance
Commercial property insurance
Liability insurance
Commercial auto insurance
Professional or malpractice insurance
Employer‑paid health and life insurance

If your business has fewer than 25 full‑time equivalent employees and offers health insurance, you may also want to explore the Small Business Health Care Tax Credit.

Business Travel and Vehicle Expenses

If your business requires travel, certain expenses may be deductible. This can include airfare, lodging, transportation and other costs directly related to business travel. For 2025, the standard mileage rate for the cost of operating your car, van, pickup or panel truck for each mile of business use during 2025 increased to 70 cents a mile.

Vehicle expenses may be deducted using either actual costs or the IRS standard mileage rate, which is updated annually. Be sure to use the rate that applies to the tax year you’re filing.

Meal deduction rules can vary by year and circumstance, so it’s important to review current guidance or talk with a tax professional.

Hiring Veterans and Other Targeted Groups

Businesses that hire employees from certain targeted groups, such as qualified veterans, may be eligible for the Work Opportunity Credit (WOTC). Employees who are members of other targeted groups, such as qualified ex-felons or summer youth employees, may also entitle you to the credit. Eligibility depends on employee qualifications and proper certification, so documentation is essential.

Disaster Losses

If your business was affected by a federally declared disaster, you may be able to deduct certain uninsured property losses. While personal casualty loss rules have become more limited in recent years, business‑related disaster losses generally remain deductible when properly documented.

Key Tax Provisions to Know About

20% Deduction for Pass‑Through Businesses

Many small businesses operate as pass‑through entities, such as sole proprietorships, partnerships, S corporations or LLCs taxed as pass‑throughs.

Eligible owners may be able to deduct up to 20% of qualified business income. This deduction is now a permanent part of the tax code, but eligibility and limits depend on factors such as income level, business type, wages paid and business assets. Because the rules are complex and thresholds are adjusted annually, it’s smart to review your eligibility each year.

Section 179 Deductions for Business Equipment/Property

Section 179 allows businesses to expense qualifying equipment, software and certain property in the year it’s placed in service, rather than depreciating it over time.

The allowable deduction amount and phase‑out limits are updated regularly and indexed for inflation. Section 179 can be a powerful option for businesses investing in equipment, but it’s subject to income limitations and specific eligibility rules.

Starting in 2025, you can deduct up to $2.5 million for qualifying equipment and property under Section 179. However, if your total purchases for the year go over $4 million, that deduction starts to shrink.

Bonus Depreciation

Bonus depreciation allows businesses to deduct a large portion — or in many cases, all — of the cost of qualifying property in the year it’s placed in service. Under current law, 100% bonus depreciation is available for eligible property.

This option can offer flexibility when planning major purchases, especially when coordinated with Section 179.

Research and Development (R&D)

Businesses that invest in research, innovation or software development may be eligible for the R&D tax credit. However, under current rules, many research and development costs must be capitalized and amortized over time rather than deducted immediately.

Because the credit and deduction rules operate separately, this is an area where professional guidance can be especially helpful.

Stay Organized to Maximize Deductions

Strong organization supports accurate filing and helps ensure you don’t miss potential write‑offs.

Maintain Good Records

Keep receipts, invoices, payroll records and tax documents in a secure place. Many businesses rely on digital tools to simplify tracking and storage.

In general, tax records should be kept for at least three to seven years, depending on the type of document and your filing situation.

File Electronically When Possible

Many small businesses are eligible to e‑file their tax returns, which can speed processing and reduce errors. Electronic filing also makes it easier to set up direct payments or receive refunds.

Watch for Identity Theft

Tax‑related identity theft remains a concern. If you receive unexpected IRS notices or suspect suspicious activity, take action promptly and follow official IRS guidance.

Final Word

Tax rules change, but understanding today’s small business deductions can help you make smarter financial decisions all year — not just during tax season. By staying informed, keeping good records, and working with a trusted tax professional, you can approach filing time with more confidence and fewer surprises.

For more information on preparing and filing taxes for your small business, or for more information regarding any of the deductions or credits mentioned here, please contact your tax professional or visit the IRS Small Business and Self-Employed Tax Center.