Tracking profit and fees for flippers

Reselling · 8 min read

Ask a flipper how an item did and you will usually hear two numbers: what it cost at the auction and what it sold for. The space between those numbers is not profit. It is a story with the fees edited out. A tracker exists to put the fees back — and for auction buyers it has one job most reseller advice never mentions: splitting one lot's all-in cost across the many items inside it, honestly.

Why 'sold price minus what I paid' is not profit

Reseller-tracking guides make the same point with a bracing example: an item bought for £3 and sold for £25 on eBay ends up yielding only £8.75 of real profit once every expense is counted. The missing money is a familiar list — the costs sellers most often forget to track are entry or lot fees, fuel and transport, parking, packaging, postage, and platform fees — and those guides warn the hidden costs often cut perceived profit in half or more. Auction flippers have it worse: the "what I paid" number itself is wrong until the buyer's premium, the tax on the whole invoice, and any per-lot charges are folded in. Bidding discipline starts with knowing a house's all-in multiplier — on the runs behind this site, a $100 hammer at one house lands around $131 all-in, and at another the working multiplier is hammer × 1.356. Your tracker should store the all-in cost, never the hammer price, as the item's cost.

The columns that matter (and the lot problem)

A workable per-item tracker needs, at minimum: item description, source (which house, which lot), purchase date and all-in cost, listing date, sale date and sale price, the platform it sold on, platform fees, shipping/packaging cost, and net profit — calculated as sale price minus all-in cost minus fees minus shipping. Standard reseller spreadsheets use exactly this spine, because the payoff is comparative: tracked over months, the sheet shows which sources and which categories actually make money, and sourcing effort follows the numbers instead of hunches.

The lot problem: a liquidation lot is one purchase and many items, some gold, some garbage. If the whole lot cost rides on the first item that sells, that item looks like a loss and everything after it looks like free money — both wrong, and both likely to steer your next bids badly. Allocate instead: split the lot's all-in cost across its sellable items by expected value (a reasonable split: each item carries cost in proportion to what you expect it to sell for), and write off the true duds at $0 recovered the day you decide they are duds. It is an estimate, but a consistent estimate beats a flattering fiction.

A worked example: one lot, real numbers

Fees checked October 13, 2026. A lot hammers at $100 at a house running about $131 all-in, and contains three sellable items:

Run the same lot the lazy way — "$185 sold minus $100 hammer is $85 profit" — and the tracker exposes the $42 gap: premium and tax at purchase, then platform fees at sale. Note what the per-item view also tells you: the local sale did the heavy lifting, and the little shipped bundle barely cleared its cost. That is a sourcing lesson for the next auction, and it only exists because the costs were allocated per item.

The fees you will forget if the sheet does not force them

• Buyer's premium and tax at the auction — fold them into cost at purchase, via your house's all-in multiplier, not at tax time from memory.
• Platform fees at the sale — and remember eBay's final value fee is charged on the total amount of the sale, including shipping you charged the buyer. On eBay Canada that is 13.6% for most categories without a Store subscription, plus a $0.30 per-order fee on sales of $10 or less and $0.40 above that (schedule in effect for items sold on or after March 3, 2025; checked October 13, 2026). Local Marketplace pickup, by contrast, carries no selling fee — a difference your tracker should make visible per channel.
• Pickup costs — fuel, parking, and the per-lot charges some houses add. Allocate a trip's costs across the lots it collected.
• Packaging and postage — boxes, tape, labels, and the difference between the postage you charged and the postage you paid.
• Losses — dead items, returns, and refunds are rows too. A tracker that only records wins will teach you to repeat your worst buys.

Set up the tracker in six steps

1. Pick the tool you will actually open. Tracking guidance converges on a simple rule: a spreadsheet is fine at low volume — one guide puts the crossover at roughly 20 items a month — and above that a dedicated reseller app earns its keep by cutting data-entry time. The best system is the one still being updated in month three.
2. Create one row per item, not per lot, with a lot ID column tying siblings together.
3. Log at the point of purchase: photograph the item, record the house, the lot, and the all-in cost the same day — memory decays faster than inventory.
4. Allocate the lot cost across sellable items by expected sale value; zero out confirmed duds immediately.
5. Close the row at sale with sale price, platform, the exact fees from the payout (not an estimate), and shipping/packaging actuals, letting the net-profit formula do the subtraction.
6. Keep the receipts behind the rows. In Canada, the CRA requires records with enough information to work out the tax you owe and support every deduction or credit, backed by original documents — electronic documents are acceptable — and supporting documents and records must be kept for six years from the later of the end of the tax year they relate to, or the date the return was filed. A tracker folder that satisfies that rule is the same folder that makes your accountant cheap and your April calm.

Success looks like this: any item on your shelf can be traced, in under a minute, to its lot, its all-in cost, its listing, and its eventual profit or loss — and the month's total is a number you would be willing to show the CRA.

The monthly review: where the tracker pays you back

Logging is bookkeeping; reviewing is management. Once a month, read three numbers. First, unsold inventory value: the all-in cost of everything still on the shelf. On the buying runs behind this site, that figure is the one watched most closely — a rising pile of unsold cost is the cue to promote the older items, check that their photos are still doing them justice, and cut prices before the space runs out. Second, net profit by source and category: which houses and which kinds of lots actually paid, so the next month's bidding follows evidence. Third, your pay. A standing rule from the same runs: pay yourself out of the operation on purpose — do not roll every dollar of profit back into more auction stock. Profit you never take out feels theoretical; taking it is what keeps the work enjoyable, and the tracker is what proves the amount is really profit and not cash that belongs to next month's fees.

One more review item for Canadian sellers: watch the running revenue total. The CRA requires self-employed sellers to report income from any business they run, and a GST/HST registration becomes mandatory once business income exceeds $30,000 in a single calendar quarter or over the last four consecutive calendar quarters. Your tracker sees that threshold coming months before a calendar does.

FAQ

Do I really need to track small items? Yes — small items are where forgotten fees do the most damage proportionally. A $0.40 per-order fee is rounding error on a $95 sale and a real bite on a $6 one. If it is worth listing, it is worth a row.

Spreadsheet or app? Start with a spreadsheet: free, transparent, and enough at low volume. Move to an app when data entry, not selling, becomes the bottleneck — around a few dozen items a month by most guidance — and export your history before switching.

Is this tax advice? No. This article is general information about record-keeping habits, not tax or accounting advice. The CRA publishes self-employed guidance and offers a free Liaison Officer service for small businesses; for your own situation, a Canadian accountant who knows resellers is money well spent.

General information only, not financial or tax advice. Fee schedules change; verify current platform rates and your own tax obligations.

Back to all guides →