If you’re self-employed, a freelancer, independent contractor, or small business owner, filing Schedule C (Profit or Loss From Business) allows you to deduct ordinary and necessary business expenses.
However, many taxpayers forget deductions that could significantly reduce their taxable income.
Below are some of the most commonly missed Schedule C deductions for the 2025 tax filing year (returns filed in 2026).
1. Home Office Deduction
One of the most overlooked Schedule C deductions for 2025 is the home office deduction.
If you use part of your home regularly and exclusively for business, you may qualify.
You can use:
Simplified Method
- $5 per square foot
- Maximum 300 square feet
- Maximum deduction: $1,500
OR
Actual Expense Method
Deduct a portion of:
- Rent or mortgage interest
- Utilities
- Property taxes
- Home insurance
- Repairs and maintenance
This deduction is common for freelancers, online sellers, consultants, and remote professionals.
2. Business Vehicle Use
If you use your vehicle for business, you may deduct those miles.
Commonly forgotten business trips include:
- Driving to meet clients
- Trips to the bank
- Picking up supplies
- Driving between job locations
You can use either:
Standard Mileage Rate
or
Actual Vehicle Expenses
Such as:
- Gas
- Repairs
- Insurance
- Registration
- Depreciation
3. Self-Employed Health Insurance
Self-employed taxpayers can deduct 100% of health insurance premiums for:
- Themselves
- Their spouse
- Dependents
This includes:
- Medical insurance
- Dental insurance
- Long-term care insurance
This deduction reduces adjusted gross income, which can also increase eligibility for other credits.
4. Phone and Internet Used for Business
Many people forget to deduct the business portion of their phone and internet bills.
Examples include:
- Client calls
- Video meetings
- Online work platforms
- Business email
If your phone is used 50% for business, you can deduct 50% of the bill.
5. Software and Online Tools
Many businesses rely on digital tools to operate.
These expenses are deductible if they are used for business purposes.
Examples include:
- Accounting software
- Website hosting
- Domain names
- Email marketing software
- Design tools
- Cloud storage
6. Office Supplies and Equipment
Small expenses add up and are often forgotten.
Common deductions include:
- Printer paper
- Ink and toner
- Pens and notebooks
- Shipping supplies
- Small tools
Tracking these purchases throughout the year can increase your deductions.
7. Advertising and Marketing
Marketing costs are fully deductible business expenses.
Examples include:
- Website design
- Social media ads
- Google ads
- Flyers and brochures
- Business cards
- Logo design
If you spend money to promote your business, it is likely deductible.
8. Business Insurance
Many self-employed taxpayers forget to deduct insurance costs.
These can include:
- General liability insurance
- Professional liability insurance
- Errors and omissions insurance
- Business property insurance
9. Education and Training
Education that improves your current business skills may qualify as a deduction.
Examples include:
- Online courses
- Industry conferences
- Certifications
- Workshops
- Professional training
10. Retirement Contributions
Self-employed individuals can reduce taxes by contributing to retirement plans.
Common options include:
- SEP-IRA
- Solo 401(k)
- SIMPLE IRA
These contributions may significantly reduce taxable income.
Final Thoughts
Understanding Schedule C deductions for 2025 can help self-employed taxpayers reduce taxable income and increase refunds.
Many deductions are missed simply because taxpayers do not track expenses during the year.
Working with a tax professional ensures you claim every deduction you’re entitled to.
Need Help Filing Self-Employment Taxes?
If you’re self-employed or run a small business, our tax team can help you maximize deductions and file accurately.
Contact us today to schedule your appointment.