Are Whatnot fees tax deductible?
Generally yes for a business seller. Which selling costs count, why inventory works differently, and the records that prove it.
The short answer
For a seller running a business, generally yes: platform selling fees are a cost of earning the income, and costs of earning income are the textbook case of a deductible expense. Sellers treated as hobbyists face different and less generous rules, and every rule here varies by country and situation, so the visible fine print first: this is records guidance, not tax advice, and your own case belongs with a professional.
The fees, and the costs around them
Whatnot takes two fees per sale, commission and payment processing, and the Weekly Order Report itemises both per transaction in their own columns, which makes them the easiest numbers in your business to substantiate. The rates and the current promotions live in our fees guide.
The same logic generally reaches the other costs of selling: shipping labels you paid for, the shipping on giveaways (a real selling cost with its own line in the report), supplies like sleeves and toploaders, and where tax lands on the fees themselves, GST or VAT, those amounts sit in the file's two fee tax columns with everything else.
Those wider families, inventory timing, postage, card supplies, equipment and software, get a page of their own in Whatnot seller tax deductions.
Is buying inventory a business expense?
The searcher's other question: is buying inventory a business expense? Generally not at the moment you buy it. What you pay for a case, a collection or a pallet is typically the cost of goods, and cost of goods generally counts against income as the goods sell, not when the money leaves your account. Buy a $1,200 case in December and sell it across January and February, and the cost belongs with those sales, not with December.
This is exactly the lot problem: one purchase price, spread across dozens of sales in different weeks. It is also why inventory that never sells matters: a written-off lot is a real cost and a real, realised loss, and BreakCount's sales history records it that way.
The record that proves it
A deduction is only as good as the record behind it. The combination that answers every question an accountant asks: every sale with its exact fees (the report, weekly), each purchase lot's cost and what sold from it, and the other costs of the operation. The wider picture of what gets taxed is in Whatnot taxes for sellers.
BreakCount holds all three: import the weekly file, add one cost per lot, and the fees, the allocations and the write-offs stay reconciled per show and per year, exportable as CSV whenever the question comes. The same records reconcile a 1099-K when one arrives; does Whatnot send tax forms covers when that happens.