The average small business claims roughly $15,000–$30,000 in deductions a year, yet many owners still miss common write-offs: home office, mileage, health insurance, retirement contributions, and Section 179 equipment. This is a practical 2026 checklist of 30+ deductions for freelancers and small businesses, with typical ranges and a way to estimate the tax impact before you file.
1. Home Office Deduction
If you use a dedicated space in your home exclusively for business, you can deduct a portion of:
| Expense | What's Deductible | Est. Annual Value |
|---|---|---|
| Rent or Mortgage Interest | % of home used for business | $3,000–$8,000 |
| Utilities (Electric, Gas, Water) | % of home used for business | $600–$1,500 |
| Internet | Business % (often 50-100%) | $600–$1,200 |
| Homeowner's/Renter's Insurance | % of home used for business | $200–$500 |
Two methods:
- Simplified: $5 per sq ft × up to 300 sq ft = max $1,500 deduction
- Regular: Calculate actual expenses × % of home used for business (bigger deduction if you have a large office)
2. Vehicle & Mileage Deductions
If you use your vehicle for business purposes, you can deduct:
| Method | Rate (2026) | Best For |
|---|---|---|
| Standard Mileage Rate | 70 cents per mile | Lower-cost vehicles, high mileage |
| Actual Expense Method | Business % of all costs | Expensive vehicles, low mileage |
If you drove 10,000 business miles in 2026, that's $7,000 deduction using the standard rate. Keep a mileage log — apps like MileIQ make this automatic.
3. Health Insurance Premiums
Self-employed individuals can deduct 100% of health, dental, and long-term care insurance premiums — for yourself, your spouse, and dependents. This deduction reduces your AGI directly.
4. Retirement Contributions
One of the most powerful tax deductions available. You can contribute AND deduct in the same year:
| Plan Type | 2026 Limit | Best For |
|---|---|---|
| SEP-IRA | $70,000 or 25% of income | High earners, simple setup |
| Solo 401(k) | $70,000 ($23,500 + employer) | Max savings, Roth option |
| Traditional IRA | $7,000 ($8,000 if 50+) | Quick and easy |
| SIMPLE IRA | $16,500 + match | With employees |
Contributing $20,000 to a SEP-IRA could save you $6,600+ in taxes (assuming 33% marginal rate).
5. Other Major Deductions
| Deduction | Details | Typical Savings |
|---|---|---|
| Office Supplies & Equipment | Paper, ink, furniture, monitors | $1,000–$5,000 |
| Software & Subscriptions | Adobe, QuickBooks, project tools | $500–$3,000 |
| Business Travel | Flights, hotels, meals (50% food) | $2,000–$10,000 |
| Professional Services | Accountant, lawyer, consultant | $1,000–$5,000 |
| Advertising & Marketing | Google Ads, social media, branding | $1,000–$8,000 |
| Phone & Communications | Business % of phone bill | $300–$800 |
| Education & Training | Courses, books, conferences | $500–$3,000 |
| Bank & Merchant Fees | PayPal, Stripe, bank charges | $500–$2,000 |
| Business Insurance | Liability, E&O, property | $500–$2,500 |
| Vehicle Maintenance | Gas, repairs, insurance (biz %) | $1,000–$4,000 |
6. Section 179: Equipment Write-Off
Section 179 lets you deduct the full purchase price of qualifying equipment in the year you buy it — instead of depreciating over several years. In 2026, the limit is $1,250,000.
Qualifying purchases include computers, vehicles over 6,000 lbs, office furniture, machinery, and certain software.
Self-Employment Tax Deduction (Don't Forget This!)
As a self-employed individual, you pay 15.3% SE tax. The good news: you can deduct 50% of your SE tax from your income. On $100,000 net income, that's a $7,650 deduction.
Deduction Checklist by Category
Save this checklist and review it before filing:
🏠 Home & Office
- Home office (simplified or regular)
- Internet (business %)
- Office supplies & furniture
- Co-working space rent
🚗 Vehicle
- Business mileage log
- Gas & maintenance (biz %)
- Car insurance (biz %)
- Parking & tolls
💰 Health & Retirement
- Health insurance premiums (100%)
- SEP-IRA / Solo 401(k) contributions
- HSA contributions
- 50% SE tax deduction
📋 Business Operations
- Software & subscriptions
- Professional services
- Advertising & marketing
- Business insurance
Frequently Asked Questions
The most common small business tax deductions include home office expenses, vehicle and mileage, health insurance premiums, retirement plan contributions (SEP-IRA or Solo 401k), office supplies and equipment, business travel, professional services, and advertising and marketing costs.
Yes. If you use a dedicated space in your home exclusively and regularly for business, you can deduct a portion of rent, mortgage interest, utilities, and internet using either the simplified method ($5 per sq ft, up to 300 sq ft) or the regular method based on actual expenses and percentage of home used.
Self-employed individuals can deduct all legitimate business expenses that are ordinary and necessary. Common deductions include the full self-employment tax deduction (50% of SE tax), health insurance premiums, retirement contributions (up to $70,000 in 2026), home office expenses, and business-related travel and meals.
For most freelancers, Schedule C business deductions are claimed separately from itemized vs. standard deduction. Business expenses reduce your gross income on Schedule C, while itemized vs. standard deduction applies to personal taxes. Many freelancers benefit from both: Schedule C deductions plus the standard deduction.
Yes. Self-employed individuals can deduct 100% of health, dental, and long-term care insurance premiums for themselves, their spouse, and dependents. This deduction is taken on Schedule 1 and reduces your adjusted gross income (AGI). In 2026, this can save you $6,000 to $12,000+ depending on your plan.
Quick Answer
Small business owners and freelancers in 2026 can deduct home office expenses ($1,500+), vehicle mileage ($7,000+ at 70¢/mile), 100% of health insurance premiums ($7,200–$20,000), retirement contributions (up to $70,000 with SEP-IRA), and all ordinary business expenses including software, advertising, travel, and professional services. Total potential deductions range from $30,000 to $60,000+ for a solo freelancer. Use BizCalcLab's Self-Employment Tax Calculator to see how deductions impact your tax bill.