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Whatnot seller tax deductions beyond the fees
Inventory timing, postage, toploaders, equipment, software, the home office, and whether supplies count when you buy them or when you use them.
What can Whatnot sellers write off besides the fees?
A tax deduction, wherever you file, is a cost the system lets you set against income before tax is worked out, and which costs qualify is exactly what varies by country. The families a seller running a business usually ends up with: inventory through cost of goods, postage and shipping supplies, card supplies like toploaders and sleeves, equipment, software subscriptions, and in some situations a share of the home. Each one below is described as it is commonly treated, not as a rule for your return.
The fine print first, because it governs every line that follows. BreakCount keeps records; it does not give tax advice. This page is educational, it names no rates, thresholds or forms, and the rules differ by country, by state and by whether your selling is a business or a hobby. Confirm all of it with your accountant. What never differs is that a deduction you cannot evidence is a deduction you do not have.
The platform fees themselves are their own question with its own answer, already covered in are Whatnot fees tax deductible, so this page starts where that one stops.
Inventory, and why its timing is different
Inventory is the one family on this page that is not really a deduction, and are Whatnot fees tax deductible works through the timing in full. The short version: what you pay for cards is commonly treated as cost of goods rather than an expense on the day you pay it. Confirm it with your accountant.
What that means in practice, and the reason it earns a place here at all, is that the work is per lot: one purchase price, spread across the sales it produced, which is exactly how to split a lot's cost across Whatnot sales. For breakers that is the difference between a coherent year and a confusing one: a heavy buying month with light selling can look like a disaster, and the reverse can look like a windfall, when neither is true.
Inventory that never sells belongs in the same story. A lot written off is a real cost of a real business, and the record of when it died is worth keeping alongside the record of what it cost. When that record never existed, because the cards were bought years before any of this was a business, selling cards with no receipts is the starting point.
Postage and shipping supplies
Shipping you paid for is commonly treated as a cost of earning the income, and for a live seller it is one of the larger ones: postage and labels, bubble mailers, boxes, tape, and the shipping on giveaways, which is a real cost even though nothing sold. Confirm the treatment with your accountant.
Two records make this family easy. Whatnot itemises the shipping you paid in the Weekly Order Report, so that half arrives weekly without any effort. The supplies you buy elsewhere do not appear in any Whatnot file, so they need their own line in whatever you keep, entered when you buy them rather than reconstructed in January.
Toploaders, sleeves and team bags
Card supplies are commonly treated the same way as shipping supplies: consumables bought to sell the goods. Toploaders, penny sleeves, team bags, semi-rigids, magnetic holders, the card savers you send off for grading in. Individually trivial, collectively not, and the reason they get missed is that they are bought in small amounts constantly. Confirm the treatment with your accountant.
Grading fees and the postage to send cards away sit near this family too, though whether they attach to the item's cost or stand as their own expense depends on how the spend ties to specific cards, and on your accountant's call. That one has its own article now: are grading fees tax deductible walks through both treatments and what a submission does to a lot's numbers.
Do you deduct supplies when you buy them or when you use them?
Both treatments exist, and which one applies to you is your accountant's call. One deducts supplies in the period you pay for them, so a box of toploaders is a cost of that period. The other holds unused supplies back until they are used, which is the stricter reading. Neither is claimed here as yours.
The distinction sellers actually get wrong is a different one: supplies are not the cards. What you paid for the cards is cost of goods, counted as they sell, and the two are never mixed. That split, and the two methods of counting it, are in cost of goods for card resellers.
Either way the record is identical, and it is the part worth getting right: a dated receipt saying what you bought and what it cost, kept as you go. Reconstructing a year of small supply purchases in January is the one version of this that never works.
Equipment and software
Equipment bought to run shows, cameras, lights, a phone stand, a label printer, a monitor, is commonly treated as a business asset or expense depending on the item and where you are, and larger purchases are often spread across years rather than claimed at once. That split is jurisdiction-specific and belongs with your accountant.
Software subscriptions are commonly treated as ongoing business expenses: the tools you pay for monthly to run the operation, a bookkeeping subscription, a design tool, and yes, a profit tracker like this one. Confirm with your accountant. The record that matters is the same for all of them, a receipt with a date and an amount, kept where you will find it again.
Where an item is used both privately and for the business, the business share is what is commonly at issue rather than the whole amount. How that share is worked out varies, so it is another accountant question.
The home office, in one paragraph
If you stream from a dedicated space at home, some share of the costs of that space is commonly deductible, and the method for working out the share, along with whether you qualify at all, varies enough between countries that no honest article can give you a number. Confirm it with your accountant before claiming anything, and if you do qualify, keep the measurement and the bills that support it.
The record is the deduction
Every family above rests on the four records the tax pillar lists, which Whatnot taxes for sellers sets out alongside the wider picture of what gets taxed. The point worth adding here is narrower and harsher: a deduction you cannot evidence is not a deduction. A bank line saying the amount left your account is not the same as a record of what it bought, which is why the receipt matters as much as the spend, and why your accountant will ask for one.
When a form arrives it reports your gross rather than your profit, which is the subject of does Whatnot send tax forms.
BreakCount keeps those records in one place. Import the weekly report, add one cost per lot, log the other costs as they happen, and the year's net profit is a number you can hand over rather than a shoebox you owe someone. Your data exports as CSV whenever you or your accountant want it.