Hannah cross-lists the same closet on eBay, Poshmark, and Mercari. Same items, same photos, same descriptions. What she could not figure out for a year was which platform paid her best—because every platform's payout statement uses different language for the same dollar of cost. Once she normalized the math, the answer turned out to depend heavily on price band, item category, and how often she used in-app offers.
Here is the head-to-head fee comparison she now uses, with worked examples at four price points and a decision matrix for which channel to list first. Verify current rates on each platform's official fee page before pricing—platforms adjust regularly and promotional periods muddy the math.
The Fee Structures, Plain
| Platform | Headline seller fee | Payment processing | Other notes |
|---|---|---|---|
| eBay (no Store) | ~13.6% final value fee (most categories) | Included in FVF (managed payments) | Plus $0.30 per-order; insertion fees beyond free allotment |
| eBay (Store, Basic+) | ~12.7% final value fee | Included in FVF | Free insertions and category discounts vary by tier |
| Poshmark | $2.95 flat on sales < $15 | Included in flat / 20% rate | 20% on sales $15 and above |
| Mercari (Jan 2025+) | 10% on item price | Combined into 10% | Previous separate payment processing fee removed in 2025 |
One quick scan reveals why side-by-side feels confusing—Poshmark's flat tier rewards low-price items, eBay's category discounts reward Store sellers, and Mercari's flat 10% is simple but no longer always the cheapest.
Worked Examples at Four Price Points
Assumes domestic shipping cost not netted (buyer pays separately in most cases). Numbers rounded.
| Item price | eBay (no Store) | eBay (Store) | Poshmark | Mercari | Best net |
|---|---|---|---|---|---|
| $10 | $10 − $1.66 = $8.34 | $10 − $1.57 = $8.43 | $10 − $2.95 = $7.05 | $10 − $1.00 = $9.00 | Mercari |
| $25 | $25 − $3.70 = $21.30 | $25 − $3.48 = $21.52 | $25 − $5.00 = $20.00 | $25 − $2.50 = $22.50 | Mercari |
| $60 | $60 − $8.46 = $51.54 | $60 − $7.92 = $52.08 | $60 − $12.00 = $48.00 | $60 − $6.00 = $54.00 | Mercari |
| $150 | $150 − $20.70 = $129.30 | $150 − $19.35 = $130.65 | $150 − $30.00 = $120.00 | $150 − $15.00 = $135.00 | Mercari |
Calculations use ~13.6% / ~12.7% on eBay (rough approximations including $0.30 per-order) and Poshmark's published $2.95 / 20% structure.
At a glance, Mercari wins on pure fee math at every band. But fee math is only one input. Velocity, audience, return rate, and offer culture matter—often more.
What the Table Doesn't Show
Audience and Velocity
Poshmark's sharing-based discovery mechanic creates daily traffic for closets that work it, even at higher fees. Many sellers report meaningfully faster sell-through there than on Mercari for fashion. Faster cash flow at a worse rate can beat slower cash flow at a better one.
Buyer Offer Behavior
Poshmark's offer-to-likers feature drives a high share of sales for active sellers. Mercari has its own offer system but with different cadence. eBay best offers vary by category and buyer pool. The fee table is computed at asking price; your actual selling price is usually lower because of offers.
Returns and Disputes
Each platform handles disputes differently. eBay's Money Back Guarantee tilts toward buyers more aggressively for clothing than Poshmark's. Mercari's middle ground varies by category. A "wins on fees" platform that costs you more in returns is not actually winning.
Cross-Listing Cost
If you list one item on all three, your true cost is fee + opportunity cost of management time. The platform that takes 20 minutes per listing is not necessarily the platform that nets you the most per hour, even if it nets you the most per item.
A Decision Matrix Hannah Uses
| Item profile | List first on | Why |
|---|---|---|
| $10–$25 fashion item, fast trend | Poshmark | Sharing community + offer-to-likers velocity |
| $10–$25 commodity item, no fashion angle | Mercari | Best net at the price band |
| $25–$60 brand-known item | eBay (Store) | Buyer pool + auth options + low fee burden |
| $60+ niche or collectible | eBay | Search intent + global reach |
| Designer or authenticated | eBay (Authenticity Guarantee, where eligible) | Buyer trust premium |
| Aged inventory (90+ days) | Cross-list aggressively + drop price | Velocity matters more than fee |
The Fee Habit Worth Building
Hannah does one thing weekly: she pulls the platform payouts, copies the totals into her tracker, and checks the implied effective fee rate—total fees divided by gross sales for that week. The number rarely matches the headline rate. Returns, offer reductions, and small shipping over/unders move the average.
Knowing your actual effective rate by platform is more useful than memorizing fee tables. Yours will not match the table above precisely.
The Mistake the Comparison Doesn't Prevent
It is easy to read a fee table and decide "Mercari wins" and then list everything there. But fees are one of several inputs to net profit. The metric that matters is still the one in the framing piece, Why Revenue Isn't Profit—net per hour, by channel, over a meaningful sample.
How to Use This Comparison
- Pick three items in different price bands you currently sell.
- Compute net at each platform using your weights.
- Compare to actual sell-through across two weeks.
- Adjust listing order based on which platform pays best after velocity weighting.
Hannah's net per hour climbed almost 20% in the quarter she stopped reflexively cross-listing and started listing strategically by item profile. Same closet, same buyer pool, better routing.
Fees do not pay you. Net profit does. The table is a starting point—the discipline is the work.