amazon seller vs ebay

Business model: fulfillment vs. flexibility

Amazon's dominant model is FBA (Fulfillment by Amazon), where you ship inventory to Amazon warehouses and they handle picking, packing, shipping, and returns. That convenience comes at the cost of storage fees, fulfillment fees, and less control over your inventory once it's in Amazon's system. eBay, by contrast, is largely seller-fulfilled: you ship your own orders (or use your own 3PL), which means more manual work but more control over cost and timing.

This structural difference is the biggest driver of accounting complexity. FBA generates automated fee deductions, reimbursements, and inventory adjustments that need to be reconciled monthly. eBay's seller-fulfilled model puts more of that cost (shipping labels, packaging) directly into your books as a line item you control, rather than a fee schedule set by the platform.

Third-party sellers aren't a niche on Amazon; they're the majority of the business. Third-party sellers account for more than half of the physical gross merchandise sold on Amazon, which is why Amazon's fee structure, policies, and reimbursement rules matter so much to anyone building a business there.

The listing model differs too, and it shapes daily operations. Amazon works from a shared catalog: you attach your offer to an existing ASIN, compete for the Buy Box, and follow Amazon's content rules. eBay gives each seller their own listing with their own photos, title, and price, plus auction formats and best-offer negotiation that Amazon simply doesn't have. Sellers of used, refurbished, vintage, or one-of-a-kind items usually find eBay's model fits better; sellers of standardized new products usually convert better on Amazon.

If you're wondering how to sell multiple of the same item on eBay, that's a multi-quantity fixed-price listing, or a variation listing when sizes and colors differ. eBay's bulk and multi listing tools let you create and revise those in batches instead of one at a time, and the newer listing tool nudges you toward the catalog where one exists. Amazon handles the same situation through the shared catalog: one ASIN, your offer, your quantity. The practical difference is that a stalled eBay listing is yours to fix, while a stalled Amazon offer may be a Buy Box problem you don't control.

Fee structure and margin math

Both platforms charge referral/final value fees as a percentage of sale price, plus optional fulfillment fees if you use FBA or eBay's managed shipping. Amazon layers on FBA storage fees (standard and long-term), removal/disposal fees, and various surcharges depending on category and size tier. eBay's fee structure is comparatively simpler: a final value fee on the total sale amount, insertion fees in some categories, and optional store subscription tiers that reduce per-listing costs.

The auction side has line items Amazon has no analogue for, and it's worth knowing how an auction works for sellers before you use one. You set a start price, optionally set a reserve (the minimum you'll accept), and eBay charges a reserve price fee in the categories that allow reserves, on top of insertion fees once you're past your free listing allowance. Performance cuts the other way: sellers who meet eBay's Top Rated standards earn a discount on final value fees, so eBay fees for top rated sellers run below the headline rate. Amazon has no performance discount; your referral rate is set by category and that's the end of it.

Don't treat any fee percentage as fixed when you're modeling margins. Amazon and eBay both revise fee schedules periodically, sometimes by category. Always verify against the current published fee schedule before building projections, rather than relying on last year's numbers.

Where this gets tricky in the books is inventory-related adjustments. Since 2025, Amazon reimburses lost or damaged FBA inventory based on your manufacturing/sourcing cost rather than retail price, and if you haven't submitted your actual per-unit cost, Amazon uses its own estimate instead. That means underreported costs quietly shrink your reimbursements. eBay has no equivalent inventory-custody exposure since you typically hold and ship the product yourself.

A worked example: the same item on both platforms

Say you sell a refurbished tablet for $100 with $60 in product cost. These numbers are purely illustrative; check each platform's current fee schedule before trusting any of them for your own category.

On Amazon with FBA, assume a 15% referral fee ($15), a $6 fulfillment fee, and $0.50 in monthly storage at your turnover rate. You'd clear roughly $100 minus $15 minus $6 minus $0.50 minus $60, about $18.50 per unit before advertising and returns.

On eBay seller-fulfilled, assume a 13% final value fee plus a small per-order fee (call it $13.30 total), $5.50 in postage, and $1 in packaging. You'd clear roughly $100 minus $13.30 minus $6.50 minus $60, about $20.20 per unit, and you never gave up custody of the inventory.

So eBay wins on paper here by under two dollars. But if the Amazon listing sells three units for every one on eBay because of Prime placement and catalog traffic, Amazon generates far more total profit despite the thinner unit margin. Velocity times margin is the comparison that matters, which is why serious sellers track contribution margin per channel rather than eyeballing fee percentages.

Returns tilt the math further. Amazon's return policies are famously buyer-friendly, and FBA returns can come back unsellable while still costing you the fulfillment fee. eBay gives sellers more policy control (restocking fees where permitted, tighter return windows in some categories), so a high-return product can carry meaningfully different true margins on each platform even when the headline fees look similar. Fold your real return rate into the per-channel math before declaring a winner.

Sales tax and 1099-K reporting

Both platforms now collect and remit sales tax on your behalf in most states, thanks to marketplace facilitator laws. Nearly every U.S. state with a sales tax now requires platforms like Amazon and eBay to collect and remit tax on third-party sales. That's a relief compared to the pre-2018 world, where sellers had to track economic nexus themselves. This entire framework traces back to a single Supreme Court case: South Dakota v. Wayfair let states require out-of-state sellers to collect tax based on sales/transaction thresholds, not just physical presence, the ruling that made marketplace facilitator laws possible in the first place.

Where sellers still need to pay attention is 1099-K reporting. The IRS threshold for third-party platform reporting has been phased in over several years rather than staying fixed at the old level, so the dollar figure that triggers a 1099-K from Amazon or eBay may differ year to year. Check the current IRS guidance rather than assuming last year's threshold applies.

If you sell on both platforms, you'll likely receive two separate 1099-Ks reporting gross payment volume, which won't match your actual revenue after fees, refunds, and chargebacks. Reconciling gross 1099-K totals against your P&L is a recurring headache for multichannel sellers, and it's exactly the kind of gap that causes mismatched filings if it's done by hand.

Running both: what changes in your books

Most sellers who start on one platform eventually add the other: Amazon for volume and discoverability, eBay for margin control, auction-style demand, or categories (used goods, collectibles, oddball sizes) that don't fit Amazon's catalog rules well. The moment you're on both, your accounting needs to normalize two very different data feeds: Amazon's FBA settlement reports with fee codes and reimbursements, and eBay's seller payouts with their own fee and refund structure.

The payout mechanics differ in ways that matter for reconciliation. Amazon settles in batches, typically every two weeks, with one net deposit covering hundreds of transactions and dozens of fee types. eBay's managed payments pay out on a schedule you choose (daily or weekly), with fees already deducted per order. Neither deposit equals your sales, so booking deposits as revenue understates income and hides fees on both platforms, just in different shapes. Each channel needs its own clearing account and its own fee mapping.

Inventory is the other split. If the same units can sell on either platform, you need one stock pool feeding two channels without overselling, and you need COGS to follow each unit through whichever channel sold it. That's the job of multi channel inventory management software, and it's worth setting up before a double-sale forces the issue with an angry buyer and a defect on your account.

Manually reconciling both in spreadsheets works until it doesn't, usually right around the time you have a sales tax notice, a 1099-K mismatch, or an FBA reimbursement dispute to sort out. That's the gap that purpose-built ecommerce accounting software for every channel is meant to close: pulling Amazon and eBay data into one clean ledger so your P&L reflects actual revenue, not gross platform payouts.

Mistakes multichannel sellers make

The classic error is judging platforms on fee percentage alone. A lower fee on a listing nobody sees earns you nothing. Compare channels on contribution margin times realistic velocity, using your own sales data once you have it.

Second, sellers often let one channel's bookkeeping standards slip. Amazon's settlement reports force some structure on you; eBay's simpler payouts tempt sellers into loose categorization. Then the 1099-Ks arrive and only one channel's books can be tied to gross volume. Hold both channels to the same standard: gross sales, fees, refunds, and shipping each in their own accounts, per channel.

Third, blending COGS across channels. If eBay sells your returns and B-stock while Amazon gets new inventory, the two channels have genuinely different unit costs. Averaging them makes eBay look worse and Amazon look better than reality. Track cost by channel and by condition, or the comparison you're running is fiction.

None of this requires heroic effort with the right tooling. When you integrate eBay with QuickBooks through a proper connector, a good ebay quickbooks integration posts eBay payouts as summarized, fee-split journals the same way Amazon connectors handle settlements, so both channels land in one ledger with matching structure.