Self-Employed Tax Deductions: 30+ Write-Offs for 2026

If you’re self-employed, tax deductions are the single biggest lever you have to reduce what you owe. Every legitimate expense you miss is money left on the table.

But here’s what most guides get wrong: they only cover Schedule C deductions. Schedule C is important, but it’s not the full picture. Self-employed individuals can claim deductions across multiple parts of their tax return, including above-the-line deductions on Form 1040, retirement contributions, health insurance premiums, and more. This guide covers all of them.

Below: 30+ deductions organized by category, with dollar examples, IRS references, and the exact line numbers where each one goes.

What deductions can self-employed people claim?

Self-employed individuals can deduct ordinary and necessary business expenses on Schedule C (advertising, supplies, home office, vehicle, insurance, professional services), plus additional deductions on Form 1040 including the deductible half of self-employment tax (the Social Security portion is capped; Medicare is not), self-employed health insurance premiums (100%), Solo 401(k) contributions (up to $72,000), and the 20% qualified business income deduction under Section 199A. The average self-employed taxpayer claims $30,000 to $60,000 in total deductions depending on industry and income level.

Key Takeaways

• The home office deduction saves $1,500 to $5,000+ – Choose the simplified method ($5/sq ft, max $1,500) or the regular method based on actual expenses prorated by business-use percentage
• Vehicle deductions add up fast at $0.725/mile – The IRS standard mileage rate covers gas, insurance, maintenance, and depreciation in one simple calculation
• Retirement contributions are your biggest single deduction – A Solo 401(k) lets you contribute up to $72,000 in 2026 ($80,000 if you’re 50+), reducing both income tax and potentially self-employment tax
• Half your self-employment tax is deductible – You’ll pay 15.3% SE tax on net earnings, but the IRS lets you deduct 50% of that amount on Form 1040 line 15
• Health insurance premiums are 100% deductible – Self-employed individuals deduct premiums for themselves, their spouse, and dependents as an above-the-line deduction on Form 1040 line 17
• The QBI deduction can cut your tax bill by 20% – Section 199A lets qualifying self-employed filers deduct up to 20% of qualified business income, worth up to $37,000 on $185,000 of net profit

How Self-Employed Deductions Work

Your deductions land in different places on your return, and each affects your tax bill differently:

• Schedule C captures business expenses. Reducing net profit here lowers both income tax and self-employment tax.
• Form 1040 above-the-line deductions (SE tax deduction, health insurance, retirement) reduce your AGI and income tax but generally don’t reduce SE tax.
• Form 8995 calculates the QBI deduction, which reduces taxable income below the line.

This distinction matters. A $1,000 Schedule C deduction saves you more than a $1,000 above-the-line deduction because it reduces SE tax too.

Home Office Deductions

If you use part of your home regularly and exclusively for business, you qualify for the home office deduction. This applies whether you own or rent.

Simplified Method (Schedule C, Line 30)

• $5 per square foot, up to 300 square feet
• Maximum deduction: $1,500
• No depreciation calculations, no tracking individual expenses
• Good for small, dedicated workspaces

Regular Method (Form 8829)

Calculate your business-use percentage (office square footage divided by total home square footage), then apply it to:

The regular method produces a larger deduction in most cases, especially if your office takes up more than 10% of your home. But it requires more recordkeeping. IRS Publication 587 covers the rules in detail.

Vehicle and Mileage Deductions (Schedule C, Line 9)

If you drive for business, you have two options. You can’t switch methods for the same vehicle after the first year.

Standard Mileage Rate

• $0.725 per mile (2026 rate per IRS Notice 2026-10)
• Covers gas, oil, repairs, insurance, registration, depreciation
• Add parking fees and tolls separately
• Track every trip with date, destination, purpose, and miles

Example: 12,000 business miles x $0.725 = $8,700 deduction

See the full breakdown at our IRS standard mileage rate guide.

Actual Expense Method

Track all vehicle costs (gas, insurance, repairs, tires, registration, lease payments, depreciation) and multiply by your business-use percentage.

Example: $9,600 total costs x 70% business use = $6,720 deduction

This method often works better for expensive vehicles. If you purchased a qualifying vehicle, you may also claim a Section 179 deduction for the full purchase price in year one.

Insurance Deductions

Self-Employed Health Insurance (Form 1040, Line 17)

This is an above-the-line deduction, meaning it reduces your AGI even if you don’t itemize. You can deduct 100% of premiums for:

• Your own health, dental, and vision insurance
• Your spouse’s coverage
• Your dependents’ coverage
• Long-term care insurance (subject to age-based limits)

Long-term care premiums are also deductible, subject to age-based limits ($480 to $5,960 depending on age in 2026).

Limitation: You can’t claim this deduction for any month where you were eligible for employer-subsidized health coverage (including through a spouse’s employer plan). IRC Section 162(l).

Business Insurance (Schedule C, Line 15)

Business-specific insurance premiums are fully deductible: general liability ($500-$3,000/year), professional liability/E&O ($1,000-$5,000/year), business property, cyber liability, workers’ comp, and business interruption insurance.

Retirement Contributions

Retirement plan contributions are one of the largest deductions available to self-employed individuals. They go on Form 1040, Schedule 1, line 16.

Solo 401(k)

The most flexible option for self-employed individuals with no employees (other than a spouse).

• Employee contribution: Up to $24,500 in 2026
• Catch-up (age 50+): Additional $8,000
• Super catch-up (ages 60-63): Additional $11,250 instead of the standard catch-up
• Employer contribution: Up to 25% of net self-employment earnings (after the SE tax deduction)
• Combined maximum: $72,000 ($80,000 with catch-up, $83,250 with super catch-up)

A Solo 401(k) also offers a Roth option. See our Solo 401(k) Roth guide for details.

SEP IRA

Simpler to set up than a Solo 401(k), but with only employer contributions.

• Contribution limit: 25% of net SE earnings, up to $72,000 in 2026
• No employee contribution component
• Can be opened and funded up to your tax filing deadline (including extensions)

Other options: A SIMPLE IRA ($17,000 employee contribution in 2026) works for those with a few employees. A Traditional IRA ($7,500, $8,600 if 50+) is available if your income is below the deduction phaseout.

Office Supplies and Equipment

Supplies (Schedule C, Line 22)

Printer ink, paper, notebooks, postage, shipping materials, and cleaning supplies. Software subscriptions under $2,500 also qualify under the de minimis safe harbor election.

Equipment and Section 179

For equipment purchases over $2,500, you have options:

• Section 179 deduction: Deduct the full cost in year one, up to $1,250,000 in 2026 ($1,250,000 for 2025; 2026 limit adjusted for inflation) (Schedule C, Line 13)
• Bonus depreciation: 100% first-year bonus depreciation (restored permanently under the One Big Beautiful Bill Act, signed July 2025)
• Standard depreciation: Spread the cost over the asset’s useful life

Common Section 179 purchases for self-employed individuals:

See our Section 179 deduction guide for the complete rules and vehicle list.

Travel Deductions (Schedule C, Line 24a)

Business travel is deductible when you travel away from your tax home overnight: airfare, lodging, 50% of meals (IRC Section 274), baggage, ground transportation, dry cleaning, tips, and Wi-Fi fees.

Example: 3-day conference in Chicago. Airfare ($450) + hotel ($600) + meals ($180 x 50% = $90) + Uber ($85) + baggage ($70) = $1,295 deduction

Mixed trips require allocation. Only business days are deductible for lodging and meals. Airfare is still fully deductible if the trip is primarily for business.

Professional Services

Legal and professional fees (Line 17): CPA/accountant fees, attorney fees for business-related work, consultant fees, and bookkeeping services.

Contract labor (Line 11): Payments to freelancers, virtual assistants, and independent contractors. Report payments of $600+ on Form 1099-NEC.

Marketing and Advertising (Schedule C, Line 8)

Every dollar you spend promoting your business is deductible: website hosting, domain names, Google/Facebook Ads, business cards, SEO services, email marketing platforms, social media tools, sponsorships, event booths, and branded merchandise.

Education and Training (Schedule C, Line 27a)

Training that maintains or improves skills in your current business is deductible: courses, workshops, certifications, continuing education, books, industry subscriptions, conference registration, and coaching programs. Training for a new career is not deductible.

Example: A freelance web developer takes a $2,400 advanced JavaScript course. Fully deductible because it improves skills in their current profession.

Communication and Technology (Schedule C, Line 25)

Phone and Internet

If you use your phone and internet for both business and personal use, deduct the business-use percentage.

• Cell phone – $100/month x 60% business use = $720/year
• Internet service – $80/month x 40% business use = $384/year

Business software subscriptions (accounting, project management, cloud storage, industry tools) are deductible at their full business-use percentage.

Interest and Bank Fees (Schedule C, Line 16)

Interest on business credit cards, business loans (SBA, lines of credit), and the business-use portion of vehicle loans is deductible. Bank charges are also deductible: monthly account fees, merchant processing fees (Stripe, Square), wire transfer fees, and overdraft fees on business accounts.

Self-Employment Tax Deduction (Form 1040, Line 15)

This isn’t a business expense. It’s an above-the-line deduction that reduces your AGI. The IRS lets you deduct 50% of the self-employment tax you pay.

How it works: Your SE tax rate is 15.3% (12.4% Social Security + 2.9% Medicare) on 92.35% of net earnings. The deductible half goes on Form 1040 line 15.

Example on $100,000 net earnings: – SE tax base: $100,000 x 92.35% = $92,350 – SE tax: $92,350 x 15.3% = $14,130 – Deductible half: $14,130 / 2 = $7,065

Learn more in our self-employment tax guide.

Qualified Business Income Deduction (Form 8995)

Section 199A lets self-employed individuals deduct up to 20% of their qualified business income. This is a below-the-line deduction that reduces taxable income but not AGI or SE tax.

2026 thresholds: Full 20% deduction below $201,775 (single) / $403,500 (MFJ). Above those amounts, phaseouts apply over wider ranges ($75,000 single / $150,000 MFJ per OBBBA) based on W-2 wages and/or property held. Verify current thresholds at IRS.gov, as these figures are adjusted annually for inflation.

Example: $150,000 QBI x 20% = $30,000 deduction, saving $7,200 at the 24% bracket.

Read our QBI deduction guide for full rules and planning strategies.

Other Commonly Missed Deductions

• Business gifts – Up to $25 per recipient per year (IRC Section 274(b), Schedule C Line 27a)
• State and local business taxes – License fees, gross receipts taxes (Line 23)
• Bad debts – Uncollectible accounts receivable (Line 27a)
• Start-up costs – Up to $5,000 in year one, amortize the rest over 180 months (IRC Section 195)
• Parking and tolls – Deductible even when using the standard mileage rate
• Uniforms and work clothing – Only if required and not suitable for everyday wear
• Penalties and fines – NOT deductible (IRC Section 162(f))

Quick Reference: Where Each Deduction Goes

Schedule C lines: 8 (advertising), 9 (vehicle), 11 (contract labor), 13 (depreciation/Section 179), 15 (business insurance), 16a-b (interest), 17 (legal/professional), 18 (office), 22 (supplies), 23 (taxes/licenses), 24a (travel), 24b (meals at 50%), 25 (utilities), 27a (other: education, dues, bank fees), 30 (home office).

Form 1040 deductions: Line 15 (50% of SE tax; applies to the Social Security component only since Medicare has no wage cap), Line 17 (self-employed health insurance, 100% of premiums), Schedule 1 Line 16 (retirement: up to $72,000+), Form 8995 (QBI deduction, 20% of QBI).

Frequently Asked Questions

Can I deduct expenses if I’m a part-time freelancer with a W-2 job?

Yes. Your side business is reported on Schedule C regardless of your employment status. You can deduct all ordinary and necessary business expenses against your freelance income. You’ll pay self-employment tax on the net profit. The only deduction you can’t claim is self-employed health insurance if you’re eligible for your employer’s plan.

What records do I need to keep for deductions?

Keep receipts for expenses over $75 and maintain all business expense records for at least three years (six years is safer). For vehicles, maintain a mileage log with date, destination, purpose, and miles. Digital records are acceptable.

Can I deduct business expenses that exceed my income?

Yes, creating a net operating loss (NOL). NOLs are limited to 80% of taxable income and carry forward only. Be aware that consistent losses may trigger an IRS hobby loss inquiry under IRC Section 183.

What’s the difference between this list and Schedule C deductions?

Schedule C deductions cover only the expenses reported on Schedule C itself. This guide includes every deduction available to self-employed individuals, including above-the-line deductions (health insurance, SE tax deduction, retirement), the QBI deduction, and deductions that appear on other forms. Think of Schedule C as one piece of a bigger puzzle.

Are home office deductions a red flag for audits?

The home office deduction used to have a reputation for triggering audits, but that’s largely outdated. The key is meeting the “regular and exclusive use” test. Your office space must be used regularly for business and not double as a guest bedroom or playroom. If you meet the test and keep documentation, the deduction is straightforward.

Can I deduct meals with clients?

Business meals are 50% deductible under IRC Section 274 when you’re discussing business with a client, customer, or business associate. Keep the receipt and note who attended, the business purpose, and the date. The temporary 100% deduction for restaurant meals expired after 2022.

How do I deduct a vehicle I use for both business and personal?

Track business and personal miles separately. If 10,000 of 15,000 total miles are for business (67%), apply that percentage to actual expenses or multiply business miles by the standard mileage rate ($0.725 per mile). Commuting to a regular office is never deductible. Driving from your home office to a client site is.

When should I work with a CPA on deductions?

If your net self-employment income exceeds $50,000, a CPA can often identify deductions you’d miss on your own. In our experience, self-employed taxpayers commonly overlook $3,000 to $8,000 in legitimate deductions. A CPA also helps with quarterly estimated payments, entity selection, and retirement plan optimization.

For a broader look at how all these deductions fit into your tax obligations, see our Self-Employed Tax Guide or the Small Business Tax Deductions guide for entity-specific strategies.

Ready to make sure you’re not leaving deductions on the table? Get started with SDO CPA.