Small business tax deductions: a complete guide for 2026

Published Tuesday 26 May 2026

Table of contents

• Why tax deductions matter
• What is a tax deduction?
• What business expenses can I deduct from my taxes?
• Common deductible expenses
• More deductions to lower your tax bill
• QBI deduction for sole proprietors
• Non-deductible expenses
• How to claim and track tax deductions
• Streamline your tax preparation with Xero
• FAQs on small business tax deductions

Key takeaways

• Small business tax deductions reduce your taxable income dollar for dollar, so tracking every legitimate expense throughout the year can save you thousands at tax time.
• Common deductible expenses include home office costs, vehicle mileage, advertising, business insurance, and professional services, plus newer deductions like depreciation under Section 179 and the qualified business income (QBI) deduction.
• Organized record keeping is the foundation of successful tax deductions; save all receipts, separate business and personal finances, and use cloud-based tools to store documentation year-round.
• The QBI deduction allows eligible sole proprietors and pass-through business owners to deduct up to 20% of qualified business income, and it's now a permanent part of the tax code.

Why tax deductions matter

Tax deductions lower the amount of income you pay taxes on, which directly reduces your tax bill. For small business owners, every deductible expense counts toward keeping more of the money you've earned.

If your business earns $80,000 in revenue and you claim $20,000 in deductions, you're only taxed on $60,000. At a 22% tax rate, that's $4,400 in savings. The more accurately you track and claim your expenses, the less you owe.

As a sole proprietor, you and your business are the same legal entity for tax purposes. That means your business expenses reduce your personal taxable income, making deductions especially valuable.

What is a tax deduction?

A tax deduction is a legitimate business expense that reduces your taxable income dollar for dollar. When you claim deductions, you subtract qualifying expenses from your gross income, which lowers the amount of tax you owe.

To qualify, an expense must be both "ordinary" and "necessary" for your trade or business. Ordinary means the expense is common and accepted in your industry. Necessary means it's helpful and appropriate for running your business.

What business expenses can I deduct from my taxes?

Most ordinary and necessary costs of running your business qualify as tax deductions. These range from everyday office supplies to larger expenses like equipment, insurance, and professional services.

Deductible business expenses generally fall into a few categories:

• Operating costs: rent, utilities, office supplies, software subscriptions
• Professional services: legal fees, accounting costs, consulting
• Equipment and assets: computers, printers, furniture, machinery
• Travel and transportation: business trips, mileage, meals with clients
• Marketing: advertising, website hosting, social media campaigns

Some costs are not deductible, including purely personal expenses and most entertainment. See the "Non-deductible expenses" section below for more detail.

Common deductible expenses

These are the everyday business costs that most small business owners can deduct. Each subsection explains what qualifies, how to calculate the deduction, and what records to keep.

Workplace (including home offices)

If you rent or own a dedicated business location, workplace expenses like rent, utilities, maintenance, and insurance are fully deductible. For home-based businesses, you can claim a home office deduction if you use part of your home exclusively and regularly for business.

You have two ways to calculate the home office deduction:

• Actual expense method: divide your office square footage by your total home square footage, then apply that percentage to your home expenses like utilities, rent or mortgage interest, insurance, and maintenance.
• Simplified method: the IRS allows $5 per square foot of home office space, up to a maximum of 300 square feet, for a maximum deduction of $1,500 per year.

Your home office must be used exclusively for business to qualify under either method. Talk with a tax advisor to confirm which option works best for your situation.

Internet and phone

Internet and phone expenses are deductible for the business portion of your usage. If you work from home and share your internet connection between personal and business use, calculate the business percentage and deduct that amount.

To determine your business usage, track how you use your phone and internet for one month and apply that ratio to your annual costs. A dedicated business phone line is fully deductible, while a shared personal and business line requires you to document the split.

Advertising and website

Advertising costs are deductible business expenses, whether you're running social media ads, paid search campaigns, or print materials. Even small test campaigns count, so keep records of all marketing spend.

Your website is a business expense too. You can deduct production costs, domain name registration, web hosting fees, and any design or development services you pay for.

Office supplies

Stationery, printing consumables, postage, and other day-to-day supplies are fully deductible. You can also deduct the cost of office equipment like printers, scanners, furniture, and computers.

For items costing $2,500 or less, you can use the de minimis safe harbor election to deduct them immediately rather than depreciating them over time. Items above this threshold may need to be depreciated (see the "Depreciation and Section 179" section below).

Vehicle expenses

If you use your personal vehicle for business, you can deduct those costs. The IRS offers two methods for calculating your vehicle deduction.

The standard mileage method lets you claim a flat rate for each business mile driven. For 2026, the IRS standard mileage rate is 72.5 cents per mile. The actual expense method lets you calculate your total vehicle costs for the year and deduct the business-use percentage. This includes gas, insurance, repairs, and depreciation.

Whichever method you choose, record the date, distance, and purpose of each business trip. Consistent mileage logs are essential if the IRS asks for documentation.

Business travel

Business travel expenses are deductible when the primary purpose of the trip is business-related. This includes meeting clients, attending conferences, and receiving job-related training.

Fully deductible travel costs include:

• Flights, train tickets, and car rentals
• Hotel rooms and lodging
• Taxis, rideshares, and public transit at your destination

Meals during business travel are partially deductible at 50%. Keep receipts and note the business purpose of each meal.

Meals

You can deduct 50% of the cost of meals when you're traveling for business or meeting with a client. The temporary 100% deduction for restaurant meals expired at the end of 2022, so the standard 50% limit applies for 2023 and beyond.

To claim meal deductions, save your receipts and note who attended, the business relationship, and the purpose of the meal. Meals must have a clear business connection to qualify.

Professional memberships and publications

Memberships in trade associations, chambers of commerce, and professional licensing bodies are deductible when they're directly related to your business. You can also deduct the cost of business magazines, trade journals, professional books, and industry research reports.

Social clubs, country clubs, and recreational memberships are not deductible, even if you occasionally discuss business there.

Interest on business loans

You can deduct the interest you pay on business loans, but not the principal. This deduction also applies to interest on business expenses charged to personal loans or credit cards, as long as the funds were used for business purposes.

Check your loan statements to see how much interest you paid during the year. Keep these records with your other tax documentation.

Business insurance

Premiums on policies that protect your business are deductible. This includes general liability insurance, professional liability coverage, commercial property insurance, and business interruption insurance.

If a policy covers both business and personal use, only the business portion is deductible. Keep your policy documents and payment records organized for tax time.

More deductions to lower your tax bill

Beyond everyday operating costs, several other deductions can significantly reduce your tax burden. These are especially relevant if you're hiring employees, investing in equipment, or just getting started.

Startup costs

If you launched a new business, you can deduct up to $5,000 in startup costs during your first year of operation. This covers expenses like market research, advertising before opening, travel to meet potential suppliers, and training for employees.

If your total startup costs exceed $50,000, the $5,000 first-year deduction begins to phase out. Any remaining startup costs can be amortized over 15 years. These costs must have been incurred before your business opened its doors.

Employee salaries and benefits

Wages, salaries, bonuses, and commissions you pay to employees are fully deductible. Benefits you provide, including paid leave, education assistance, and employee wellness programs, also qualify as business expenses.

Payroll taxes you pay as an employer (your share of Social Security and Medicare) are deductible too. If you use a payroll service, those fees are an additional deductible expense.

Contract labor

Payments to independent contractors and freelancers are deductible business expenses. If you pay any individual contractor $600 or more during the tax year, you're required to issue them a Form 1099-NEC.

Keep records of all contractor agreements, invoices, and payments. Accurate 1099 reporting protects both you and your contractors at tax time.

Depreciation and Section 179

When you purchase equipment, vehicles, or other business assets that last more than one year, you typically deduct the cost over the asset's useful life through depreciation. Section 179 of the tax code lets you deduct the full purchase price of qualifying equipment in the year you buy it, rather than spreading it over several years.

For 2026, the Section 179 deduction limit is $2,560,000. In addition, 100% bonus depreciation has been restored for property acquired after January 19, 2025. This means you can write off the entire cost of qualifying assets in the first year.

Qualifying assets include machinery, office furniture, computers, software, and certain vehicles used for business. Talk with your tax advisor to determine which depreciation method best fits your situation.

Retirement plan contributions

Contributions to retirement plans for yourself and your employees are deductible. As a self-employed individual, you can contribute to a Simplified Employee Pension (SEP) IRA or a Solo 401(k), both of which offer significant tax advantages.

SEP IRAs allow contributions of up to 25% of your net self-employment earnings. Solo 401(k) plans let you contribute as both employer and employee, potentially allowing higher total contributions. The exact limits change annually, so check current IRS guidelines for your tax year.

Health insurance premiums

If you're self-employed and not eligible for a spouse's employer-sponsored health plan, you can deduct 100% of the premiums you pay for medical, dental, and vision insurance for yourself, your spouse, and your dependents.

This deduction is taken on your personal tax return (Form 1040) rather than on Schedule C. It reduces your adjusted gross income, which can lower both your income tax and self-employment tax.

Charitable contributions

Charitable donations can be deductible, but the rules depend on your business structure. Sole proprietors claim charitable deductions on their personal tax return as an itemized deduction, not as a business expense on Schedule C.

To qualify, donations must go to IRS-recognized tax-exempt organizations. Keep receipts for all contributions, and get a written acknowledgment from the charity for any single donation of $250 or more.

QBI deduction for sole proprietors

The qualified business income (QBI) deduction is one of the most valuable tax breaks available to sole proprietors and other pass-through business owners. It allows eligible taxpayers to deduct up to 20% of their qualified business income, which can lead to significant savings.

The QBI deduction has been made permanent under the One Big Beautiful Bill Act, giving small business owners long-term certainty. For 2026, the income thresholds are $197,300 for single filers and $394,600 for married couples filing jointly. Below these thresholds, most sole proprietors qualify for the full 20% deduction regardless of business type.

Above those income levels, additional limitations apply based on your industry and the amount of wages you pay. Service-based businesses like consulting, law, and accounting may face restrictions at higher income levels. A tax professional can help you determine your exact eligibility and calculate the deduction correctly.

Non-deductible expenses

Not every business-related cost is deductible. Understanding what you can't deduct helps you avoid errors on your tax return and potential issues with the IRS.

These expenses are generally not deductible:

• Personal expenses: personal meals, clothing, entertainment, and personal travel
• Government fines and penalties: traffic tickets, tax penalties, and regulatory fines
• Political contributions: donations to political candidates or campaigns
• Personal portions of mixed-use items: only the documented business percentage of shared expenses like vehicles or phone plans is deductible

For mixed-use expenses, keep detailed records showing how you calculated the business and personal split. Items costing more than $2,500 may need to be depreciated over time rather than deducted immediately, unless they qualify for Section 179 expensing.

How to claim and track tax deductions

Claiming your deductions starts with filing the right forms and keeping solid records all year. Good record keeping protects your deductions if the IRS ever asks for proof.

Filing your deductions

If you're a sole proprietor, independent contractor, or single-member LLC, you report business income and deductions on IRS Schedule C, which you attach to your personal Form 1040. Learn more in Xero's guide to Schedule C.

The basic steps are straightforward:

1. Report all business income on Schedule C.
2. List each deductible expense in the appropriate category.
3. Calculate your net profit or loss.
4. Attach Schedule C to your Form 1040 when filing your personal return.

Record-keeping best practices

Organized records are the foundation of successful tax deductions. Without proper documentation, you risk losing deductions entirely if you're audited. Here are the essentials:

• Open a dedicated business bank account to separate all business transactions from personal expenses.
• Save every receipt and invoice, regardless of the amount. Digital copies are acceptable.
• Add detailed notes to each expense, including the date, amount, business purpose, and any attendees for meals or events.
• Store records securely using cloud-based systems. The IRS generally requires you to keep tax records for at least three years.
• Review expenses monthly so nothing falls through the cracks at year-end.

Accounting software like Xero Accounting Software with Hubdoc can pull bills and receipts into your system automatically. This saves time on manual data entry and keeps your expense records organized year-round.

Common mistakes to avoid

Even experienced business owners make errors with deductions. Watch out for these common pitfalls:

• Mixing personal and business expenses in the same account, which makes it harder to prove deductions.
• Forgetting to track small, recurring expenses like subscriptions, parking fees, and tolls. These add up over the year.
• Claiming the full cost of mixed-use items without calculating and documenting the business percentage.
• Missing deductions because you didn't keep receipts. If you can't prove the expense, you can't deduct it.

Streamline your tax preparation with Xero

Staying on top of your tax deductions doesn't have to be stressful. With the right tools, you can track expenses, organize receipts, and get a clear view of your finances all year. That makes tax time smoother and helps you feel confident you're claiming every deduction you're entitled to.

Xero Accounting Software simplifies your bookkeeping so you can focus on running your business, not your books. From capturing receipts on the go to running detailed financial reports, Xero gives you the tools to manage your deductions with ease. See how Xero can support your business and get one month free.

FAQs on small business tax deductions

Here are answers to frequently asked questions about small business tax deductions.

What is the $2,500 expense rule?

The de minimis safe harbor election lets you immediately deduct business assets costing $2,500 or less per item or invoice, rather than depreciating them over multiple years. This applies to businesses without an applicable financial statement and covers items like electronics, tools, and small equipment.

What business expenses are 100% deductible?

Many ordinary and necessary business expenses are fully deductible, including office supplies, rent for your business premises, software subscriptions, advertising costs, and professional fees. The expense must be common in your industry and helpful for running your business.

What is the 20% tax deduction for small businesses?

This is the qualified business income (QBI) deduction, which allows eligible pass-through business owners, including sole proprietors, to deduct up to 20% of their qualified business income. The deduction has been made permanent and can significantly lower your overall tax bill.

Can I deduct startup costs for a new business?

Yes, you can deduct up to $5,000 in startup costs during your first year of business, covering expenses like market research, pre-opening advertising, and employee training. If your total startup costs exceed $50,000, the $5,000 deduction phases out and remaining costs are amortized over 15 years.

What records do I need for tax deductions?

Keep receipts, invoices, bank statements, and mileage logs for every business expense, noting the date, amount, business purpose, and names of anyone involved. The IRS generally requires you to retain tax records for at least three years from the date you filed your return.

How do I calculate the home office deduction?

The simplified method lets you deduct $5 per square foot of your home office, up to 300 square feet, for a maximum of $1,500 per year. The actual expense method requires you to calculate the business-use percentage of your home and apply it to total home expenses like rent, utilities, and insurance.