Quick Answer
Online sales are generally taxable income if you profit from buying and reselling items or sell personal items for more than you paid. In 2026, platforms report sellers who receive $600+ in payments. You'll owe both income tax and potentially self-employment tax on profits.
Best Answer
James Okafor, EA
Best for W-2 employees who sell items online for extra income and need to understand their tax obligations
When online selling becomes taxable income
Online selling becomes taxable when you're doing it as a business activity or selling items for more than you originally paid. According to IRS Publication 334, if you're buying items specifically to resell them for profit, you're operating a business and must report all income.
The key distinction is between:
Example: $15,000 in annual online sales
Let's say you earn $75,000 from your W-2 job and make $15,000 selling items online, with $10,000 in costs (inventory, shipping, fees). Your taxable profit is $5,000.
Your $5,000 profit will be subject to:
The $600 reporting threshold in 2026
Starting in 2026, payment platforms like PayPal, Venmo, and eBay must send you Form 1099-K if you receive $600+ in payments during the year. This is down from the previous $20,000 threshold.
Important: Just receiving a 1099-K doesn't automatically mean you owe taxes. You still only owe taxes on your actual profit.
Key factors that affect your taxes
What you should do
1. Track everything: Use a spreadsheet or app to log every purchase, sale, and expense
2. Separate business from personal: Don't mix selling old clothes with buying inventory to flip
3. Make quarterly payments: If you expect to owe $1,000+ in tax on your side hustle, pay quarterly estimates
4. Consider a business bank account: Keeps your selling activity separate from personal finances
Key takeaway: Online selling profits are taxable business income subject to both regular income tax and 15.3% self-employment tax. The $600 1099-K threshold means more sellers will receive tax forms, but you only owe tax on actual profits.
Key Takeaway: Online selling profits are taxable business income subject to both regular income tax and 15.3% self-employment tax. Track all expenses to reduce your taxable profit.
Tax treatment comparison for different types of online selling
| Type of Sale | Tax Treatment | Forms Needed |
|---|---|---|
| Personal items sold at loss | Not taxable | None |
| Personal items sold for profit | Capital gains tax | Schedule D |
| Items bought to resell | Business income + SE tax | Schedule C |
More Perspectives
Alex Torres
Best for people who just started selling online and are confused about whether they owe taxes
Don't panic — start with the basics
I get it. You sold some stuff online to make extra money, and now you're wondering if you've accidentally started a business. The good news? Most casual sellers don't owe much in taxes, and it's not as complicated as it seems.
The simple test: Are you making profit?
If you're just selling personal items (clothes, books, electronics) for less than you paid, you probably don't owe any taxes. The IRS considers this a personal loss, not taxable income.
But if you're buying items specifically to resell — like thrifting clothes to flip on Poshmark or buying wholesale products — then you're running a business and need to report the income.
Real example from my experience
When I first started selling online, I made $3,000 in sales but spent $2,200 on inventory and fees. My actual profit was only $800. That $800 got added to my regular job income and cost me about $275 in extra taxes.
The key lesson: Track your expenses! Every platform fee, shipping cost, and purchase price reduces your taxable profit.
What to do right now
1. Add up your actual profit — sales minus all costs
2. If profit is under $400, you probably don't owe self-employment tax
3. If profit is over $400, you'll need to file Schedule C and pay self-employment tax
4. Start tracking everything going forward — don't stress about perfect records for this year
Key takeaway: Most new online sellers owe less tax than they expect because expenses reduce taxable profit. Focus on tracking costs, not just sales revenue.
Key Takeaway: Most new online sellers owe less tax than they expect because expenses reduce taxable profit. Focus on tracking costs, not just sales revenue.
James Okafor, EA
Best for experienced side hustlers who want to optimize their tax strategy
Advanced strategies for regular online sellers
If you're making consistent money from online sales, you're running a business — embrace it and optimize for taxes.
Business expense opportunities
Quarterly estimated taxes
Once your side hustle profit exceeds $1,000 annually, you should make quarterly estimated tax payments to avoid penalties. The self-employment tax alone (15.3%) can create a significant tax bill.
For a $5,000 annual profit, you'd owe roughly $1,865 in extra taxes. Spread this across four quarterly payments of ~$466 each.
Business structure considerations
If your side hustle grows beyond $10,000-15,000 in annual profit, consider forming an LLC or S-Corp to potentially save on self-employment taxes and create clearer business/personal separation.
Key takeaway: Treat consistent online selling as a real business with proper record-keeping, quarterly tax payments, and strategic expense deductions.
Key Takeaway: Treat consistent online selling as a real business with proper record-keeping, quarterly tax payments, and strategic expense deductions.
Sources
- IRS Publication 334 — Tax Guide for Small Business
- IRS Form 1099-K Instructions — Payment Card and Third Party Network Transactions
Related Questions
Reviewed by James Okafor, EA on February 28, 2026
This content is for educational purposes only and is not a substitute for professional tax advice. Consult a qualified tax professional for advice specific to your situation.