Is Whatnot Tax Exempt? Income, Self-Employment, and Sales Tax

Whatnot is not tax exempt for sellers. The money you make selling on Whatnot is taxable income, and if you sell often enough to look like a business, you also owe self-employment tax of 15.3% on your net profit. That’s true whether or not Whatnot sends you a Form 1099-K, and true whether you stream weekly or offloaded a single collection.1Internal Revenue Service. Are You Making Extra Cash Selling Stuff or Providing a Service

Not Getting a 1099-K Doesn’t Mean You Don’t Owe

This is where most sellers get the wrong idea. Whatnot only has to send you a Form 1099-K if your payments through the platform exceed $20,000 in gross sales and more than 200 transactions in a calendar year. That threshold reverted under the One, Big, Beautiful Bill Act.2Internal Revenue Service. IRS Issues FAQs on Form 1099-K Threshold Under the One, Big, Beautiful Bill

The threshold controls paperwork, not tax liability. If you sell $2,000 worth of cards and never see a form, that income is still reportable and still taxed.1Internal Revenue Service. Are You Making Extra Cash Selling Stuff or Providing a Service The IRS position is straightforward: report all income, form or no form.

When a 1099-K does arrive, the gross number on it will overstate what you actually owe tax on. It bundles in shipping the buyer paid, refunds, and Whatnot’s fees. You reconcile that gross figure with your real profit by subtracting your costs on Schedule C.3Internal Revenue Service. What to Do With Form 1099-K

What You Actually Owe: Income Tax Plus Self-Employment Tax

If your Whatnot activity qualifies as a business, your net profit gets taxed twice over in a sense: once at your ordinary federal income tax rate, and again through self-employment tax when net profit hits $400 or more. Self-employment tax is 15.3% total, made up of 12.4% for Social Security and 2.9% for Medicare.4Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes) For 2026, the Social Security portion applies to the first $184,500 of net self-employment earnings; the Medicare portion has no cap.5Social Security Administration. Contribution and Benefit Base

The 15.3% often surprises new sellers. As an employee, you’d see half that on your paycheck and your employer would cover the other half. Selling for yourself, you’re both parties. You can deduct the employer-equivalent half as an adjustment to gross income on your Form 1040, which cuts your income tax but not the self-employment tax itself.4Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)

A rough planning rule for a first-year seller: set aside 25% to 30% of your net profit as you go. That covers federal income tax and self-employment combined for most people in the lower and middle brackets. You’ll refine the number after you see your actual effective rate.

Business or Hobby: The Classification That Changes Everything

Whether the IRS treats your selling as a business or a hobby decides whether your expenses reduce what you owe. Business sellers report revenue on Schedule C and deduct their costs against it.6Internal Revenue Service. Instructions for Schedule C (Form 1040) Hobby sellers report gross income on Schedule 1 as “Other Income” and cannot deduct expenses at all. The Tax Cuts and Jobs Act suspended the hobby expense deduction starting in 2018, and the One, Big, Beautiful Bill Act made that permanent.7Taxpayer Advocate Service. Itemized Deductions Reported on Schedule A (Form 1040)

The math is unforgiving under the hobby label. Earn $3,000 in gross sales, spend $2,500 on the inventory, and you pay income tax on the full $3,000 anyway.

The IRS looks at whether you put in consistent time and effort, keep business-like records, depend on the income, and change your approach to improve profitability. Turning a profit in at least three of five consecutive years generally creates a presumption of business status.8Internal Revenue Service. Know the Difference Between a Hobby and a Business Sellers who stream regularly, maintain inventory, and actively try to grow will typically qualify as a business.9Internal Revenue Service. Here’s How to Tell the Difference Between a Hobby and a Business for Tax Purposes

What You Can Subtract Before Tax Hits

Your taxable profit is not the gross number in your Whatnot dashboard. It’s what remains after cost of goods sold and business expenses. Getting this calculation right often makes a four-figure difference in what you owe.

Cost of Goods Sold

For most Whatnot sellers, COGS is the biggest deduction. Take your inventory value at the start of the year, add everything you bought during the year, and subtract what’s still on the shelf at year-end. Include acquisition costs like shipping from a supplier or auction fees.

For unique items (trading cards, vintage clothing, collectibles), track each item’s exact cost and match it to its sale price. When individual tracking isn’t practical on bulk lots of similar items, first-in, first-out assumes the oldest inventory sold first.10Internal Revenue Service. Publication 538 – Accounting Periods and Methods Stay consistent year to year.

Ordinary Business Expenses

After COGS comes the usual list:

  • Whatnot’s platform fees and commissions come off in full.6Internal Revenue Service. Instructions for Schedule C (Form 1040)
  • Shipping and packaging: postage, boxes, tape, bubble wrap, poly mailers.
  • Streaming equipment: cameras, ring lights, tripods used for your broadcasts.
  • Internet and phone at the business-use percentage, documented and reasonable. The base cost of a first home phone line isn’t deductible, but additional business-attributable charges are.6Internal Revenue Service. Instructions for Schedule C (Form 1040)
  • Mileage to source inventory at estate sales, thrift stores, or card shows, at 72.5 cents per mile for 2026.11Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile
  • Startup costs in your first year: up to $5,000 deducted immediately, remainder spread over 15 years. The $5,000 phases out dollar-for-dollar once total startup costs pass $50,000.12Office of the Law Revision Counsel. 26 U.S. Code 195 – Start-up Expenditures

Home Office

Space used exclusively and regularly for the business (a streaming room, a packing station, a dedicated inventory area) can support a home office deduction. The simplified method pays $5 per square foot up to 300 square feet, capped at $1,500.13Internal Revenue Service. Simplified Option for Home Office Deduction The actual expense method on Form 8829 takes more paperwork but often yields more by allocating rent or mortgage interest, utilities, and insurance to the business portion.14Internal Revenue Service. How Small Business Owners Can Deduct Their Home Office From Their Taxes

“Exclusively” is the word that trips people. A guest room that doubles as your packing area doesn’t count. A permanent corner of the garage used only for shipping does.

Selling Off Personal Stuff Works Differently

Cleaning out a personal collection isn’t the same as running inventory. If you sell a personal item for less than you paid, that’s a nondeductible loss on personal-use property; you don’t report the sale.15Internal Revenue Service. Losses (Homes, Stocks, Other Property) If you sell it for more than you paid, the gain is taxable, usually as a capital gain rather than ordinary business income. If your 1099-K mixes personal sales with business sales, keep clear records separating the two.

Sales Tax: Whatnot Handles It

Sales tax sits separately from federal income tax, and here Whatnot sellers get a break. Marketplace facilitator laws in nearly every sales-tax state require the platform to collect and remit sales tax on transactions it processes. Whatnot confirms it charges buyers the applicable sales and use tax at checkout and sends it to the taxing authority; sellers don’t collect sales tax on orders placed through the Whatnot app.16Whatnot. How Tax Is Collected From Purchases on Whatnot

The obligation shifts back to you for anything you sell off the platform: direct sales through social media, at a flea market, or on your own website. That means registering for a sales tax permit with your state and filing periodic returns. Sales tax you collect isn’t your money; it’s held for the state.

Paying as You Go

Whatnot doesn’t withhold anything. If you expect to owe $1,000 or more in federal tax for the year (income tax plus self-employment tax, minus withholding from any other jobs), you’re required to make quarterly estimated payments. Skipping them triggers an underpayment penalty even if you settle up in full at filing.17Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty Payments are due four times a year, with the 2026 schedule listed on Form 1040-ES.18Internal Revenue Service. 2026 Form 1040-ES – Estimated Tax for Individuals

Total payments across the year need to cover at least 90% of your current-year tax or 100% of last year’s tax, whichever is smaller, to dodge the penalty. If your prior-year adjusted gross income exceeded $150,000, that 100% figure rises to 110%.17Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty

Records the IRS Expects You to Keep

Returns can be audited up to three years from filing, or six years if you understate gross income by more than 25%.19Internal Revenue Service. How Long Should I Keep Records Keep, at minimum:

  • Purchase receipts for everything bought for resale, with date, price, and source.
  • Sales records exported from Whatnot showing what sold, when, and for how much.
  • Expense documentation for shipping, packaging, equipment, and software.
  • Inventory logs updated as you buy and sell.
  • A mileage log with date, destination, purpose, and miles for each business trip.

Digital records meet the same standard as paper.20Internal Revenue Service. What Kind of Records Should I Keep Scanned receipts and a decent spreadsheet are enough. The sellers who lose audits usually claimed real deductions they couldn’t back up on paper.