Reseller bookkeeping for people who sell on everything
Poshmark, Mercari, Depop, StockX, GOAT, Whatnot, Facebook Marketplace, eBay: every platform nets a different fee stack on a different schedule, and every one sends its own 1099-K. We turn the whole tangle into clean books, sourcing runs included.
Reseller accounting is harder than most ecommerce accounting, not easier. A DTC brand buys 5,000 identical units with one invoice. You buy a $400 bin lot that yields 60 sellable one-of-one items, list them across four platforms, and get paid net of four different fee structures. Generalist bookkeepers don't have a category for that. We built one.
Whether you flip sneakers on StockX and GOAT, clothes on Poshmark and Depop, or run live Whatnot auctions three nights a week, the same three jobs decide whether your numbers mean anything: gross sales rebuilt per platform, sourcing costs allocated to the items they produced, and January's stack of 1099-Ks tied to the books.
The reseller problems generalist bookkeepers can't handle
The 1099-K panic
Most reselling businesses grew out of a personal account, so the 1099-K that arrives reports your garage-sale history and your business inventory in one gross number. Filed wrong, you either pay tax on your own used furniture or claim business deductions against personal stuff. We separate the streams so each dollar gets its correct treatment, documented.
One thrift receipt, fifty future listings
A $85 thrift run produces nine items that sell over the next eight months on three platforms. Expense the receipt when you paid it and every month's profit reflects how much you sourced, not how much you sold. Real reseller COGS means allocating sourcing costs to items at intake and recognizing them as each item sells.
Five platforms, five fee mazes
Poshmark takes a flat $2.95 under $15 and 20% above it. StockX charges a seller fee plus 3% processing that drops as your level rises. Whatnot stacks an 8% commission on top of payment processing. Mercari rewrote its fee model twice in 2024 alone. Blend it all into one 'selling fees' line and you can't tell which platform actually pays you best.
Live selling breaks normal bookkeeping
A three-hour Whatnot stream can produce 240 sales, a dozen giveaways and a stack of bundle deals. Giveaways are marketing cost that looks like shrinkage, bundles scramble per-item pricing, and per-order posting would flood any accounting file. We post summary-level per stream night, with giveaway costs booked as the marketing they are.
What we do every month
- Every platform's payouts rebuilt to gross sales, fees and refunds
- Sourcing-run costs allocated across the items they produced
- Per-platform P&L: Poshmark vs eBay vs StockX vs Whatnot
- 1099-K reconciliation for every platform that sends one
- Personal-item sales separated from business inventory
- Shipping label costs matched to the right platform
- Death-pile tracking and aged-inventory write-downs
- Books closed by the 10th business day in your own QuickBooks
Sourcing-run COGS, the heart of reseller accounting
The method matters more than the tool. For lots and bulk runs, we allocate cost across sellable items at intake: by count when items are similar, by expected resale value when they're not, with the junk portion written off immediately. A $250 pallet with 40 sellable units carries $6.25 per unit; the vintage jacket from the $85 thrift run carries its own share. From then on, each sale recognizes its real cost, dead inventory shows its real loss, and you can finally answer whether bin lots or thrift racks earn more per sourcing hour.
That answer is worth actual money every weekend you go sourcing, and it's the number gut feel gets wrong most often. Sellers who track it usually discover one sourcing channel subsidizing another.
Built for the platforms nobody else supports
Look for a bookkeeping firm with a Poshmark page or a Whatnot page. There aren't many, because specialist firms built for Shopify brands and treat resale platforms as rounding errors. Meanwhile the platforms themselves offer little accounting tooling: no A2X connector, exports that change format, payouts that mix sale proceeds with shipping credits. We do the settlement rebuild manually where tooling doesn't exist, the same way we do for refurbished-electronics marketplaces.
Most resellers we work with run four to six platforms off one inventory pool. Everything consolidates into one set of books with per-platform margins, which is the report that tells you where the next hour of listing effort should go.
Closed by day 10, or 50% off
Your prior month is reconciled and delivered by the 10th business day, guaranteed in writing. Miss it and that month's fee is half price. No competitor guarantees anything.
You own your books
We work inside your QuickBooks, Xero or NetSuite file, not ours. Leave any time and everything stays with you, diligence history included.
Exit-grade, always
Accrual books with landed-cost COGS and a maintained addback schedule. If a buyer or lender called tomorrow, your books would be ready.
Published pricing, no lock-in
Our full rate card is on the website and engagements run month-to-month. Every ecommerce-exclusive competitor hides pricing behind a sales call. We don't.
Reseller bookkeeping FAQs
Do I have to pay taxes on my Poshmark, Mercari or Depop sales?
If you're sourcing items to resell for profit, yes: that's a business, and net profit is taxable plus 15.3% self-employment tax, whether or not a 1099-K arrives. Selling your own used things at less than you paid isn't taxable income, but it may still show up in a 1099-K and needs to be reported correctly to avoid an IRS mismatch. Our reseller taxes guide covers the whole picture.
How do I track COGS from thrift stores and garage sales?
Keep every receipt, photograph the haul, and allocate the run's cost across the sellable items at intake, by count or by expected resale value. Cash buys with no receipt need a log entry made the same day: date, place, items, amount. We set up and maintain this allocation as part of the monthly work, and it's the difference between real margins and guesses.
I sell on six platforms. Can you consolidate all of them?
Yes, that's the standard reseller setup: one QuickBooks file, per-platform income and fee accounts, one monthly close. Poshmark, Mercari, Depop, StockX, GOAT, Whatnot, Facebook Marketplace, eBay and Amazon all land in the same books with their own margin lines.
What does a bookkeeper for resellers cost?
Our Books Lite tier runs $149 to $249 a month for growing resellers, and our specialist tiers start at $1,250/mo when you're doing $100K+ a month across platforms. The full rate card is public on our pricing page. Either way it's month-to-month, in a QuickBooks file you own.
I got a 1099-K on my personal account and I'm panicking. What now?
Don't ignore it: the IRS gets a copy. The fix is books that split business flips from personal-item sales, report each correctly, and reconcile to the form's gross number. If you've never kept books, that's a catch-up project, and it's much cheaper before a mismatch notice than after.
We'll do last month's books free, and show you what your bookkeeper missed
The free Ecommerce Books Audit: connect read-only access and within 3 business days you get a clean month of books plus a 10-minute recorded teardown of every margin leak, COGS error and sales-tax risk we found. Keep it all, even if you never hire us.
- ✓ Books closed by day 10, guaranteed in writing
- ✓ Everything stays in your QuickBooks, Xero or NetSuite file
- ✓ Published pricing, month-to-month, no lock-in