Whether you drive for a rideshare company, freelance on the side, or sell products online, the IRS considers your side hustle income taxable. The rules are different from W-2 employment, and failing to follow them can result in penalties. Here is what you need to know in 2025.
All Side Income Is Taxable
Any income you earn — regardless of the amount — must be reported on your tax return. This is true even if you do not receive a 1099 form. Common sources of side income include freelancing, rideshare driving, food delivery, selling goods online, tutoring, consulting, and renting property.
The IRS expects you to report this income even if the payer does not report it to them. However, the reporting landscape is changing.
1099-K Reporting Threshold
Starting in 2025, payment platforms (PayPal, Venmo, Stripe, Cash App, Etsy, etc.) must issue a Form 1099-K if your transactions exceed $600 in gross payments during the year. This is a significant drop from the previous $20,000 / 200 transaction threshold.
Important: The 1099-K reports gross payments, not your profit. If you sold $5,000 worth of items on eBay but your cost of goods was $3,000, the 1099-K will show $5,000. You are responsible for reporting the correct net income on your return.
Personal transactions (splitting dinner, receiving gifts) should not be included, but platforms may not always distinguish between personal and business payments. Keep clear records.
Self-Employment Tax
Side hustle income is not just subject to income tax — it also triggers self-employment (SE) tax of 15.3% on net earnings. This covers both the employer and employee portions of Social Security (12.4% up to $176,100 in 2025) and Medicare (2.9% with no limit).
You can deduct the employer-equivalent portion (half of SE tax) as an above-the-line deduction on your Form 1040, which reduces your adjusted gross income.
For example, if your net side hustle income is $20,000, your self-employment tax is approximately $2,826 (92.35% of $20,000 times 15.3%). You can deduct half ($1,413) from your AGI.
When to Pay Estimated Taxes
If you expect to owe $1,000 or more in tax after subtracting withholding and credits, you must make quarterly estimated tax payments to avoid an underpayment penalty.
The 2025 quarterly deadlines are:
- Q1: April 15, 2025
- Q2: June 16, 2025
- Q3: September 15, 2025
- Q4: January 15, 2026
Use Form 1040-ES to calculate and submit your payments. A safe harbor approach is to pay at least 100% of your prior year’s total tax (110% if your AGI exceeded $150,000) spread across the four quarters.
If you also have a W-2 job, another strategy is to increase your withholding at your employer to cover the additional side hustle tax. This avoids the need for separate quarterly payments.
Common Deductions for Gig Workers
Side hustlers who operate as a business (not a hobby) can deduct ordinary and necessary expenses on Schedule C:
- Vehicle expenses: Standard mileage rate of 70 cents per mile in 2025, or actual expenses. Track every business mile.
- Home office: If you use a dedicated space regularly and exclusively for business. The simplified method allows $5 per square foot up to 300 square feet ($1,500 max).
- Supplies and equipment: Computers, phones, software, tools, and materials used for the business.
- Internet and phone: The business-use percentage of your monthly bills.
- Professional services: Accounting, legal, and tax preparation fees.
- Marketing and advertising: Website hosting, domain names, social media ads.
- Health insurance premiums: Self-employed individuals can deduct 100% of health insurance premiums as an above-the-line deduction.
Keep receipts and detailed records for all deductions. The IRS can disallow expenses without adequate documentation.
Hobby vs. Business: Why It Matters
The IRS distinguishes between a hobby and a business. If your activity is classified as a hobby, you cannot deduct expenses against the income (hobby losses were eliminated by the Tax Cuts and Jobs Act).
Factors the IRS considers include:
- Do you carry on the activity in a businesslike manner?
- Does the time and effort you put in indicate an intent to make a profit?
- Have you made a profit in at least 3 of the last 5 years?
- Do you depend on the income for your livelihood?
If your side hustle consistently loses money and you are using it to offset your W-2 income, the IRS may reclassify it as a hobby and disallow the losses.
Practical Example
Jessica has a full-time job earning $65,000 (W-2) and earns $25,000 from freelance graphic design on the side. Her business expenses total $5,000 (computer, software, home office, internet).
- Net self-employment income: $20,000
- Self-employment tax: approximately $2,826
- SE tax deduction (half): $1,413
- Taxable income from side hustle: $20,000 minus $1,413 = $18,587
- Federal income tax on side income (at 22% bracket): approximately $4,089
- Total additional tax from side hustle: approximately $6,915
- Effective tax rate on side income: about 27.7% after deductions
Without claiming her $5,000 in expenses, Jessica would owe roughly $1,700 more in taxes — highlighting the importance of tracking deductions.
Bottom Line
Side hustle income is fully taxable and subject to self-employment tax on top of regular income tax. Stay on top of quarterly estimated payments, keep meticulous records of expenses, and ensure your activity qualifies as a business rather than a hobby to claim deductions. See IRS Publication 334 (Tax Guide for Small Business) and Publication 535 (Business Expenses) for detailed guidance.