Reseller Profit Margin Guide: What's a Good Margin on Each Platform?

Margin vs markup: don't confuse them

This is the single most common math error in reselling. Margin is profit as a percentage of your sale price. Markup is profit as a percentage of your cost. They are never the same number (except at 0%).

When people say "I aim for 50% margins," make sure they mean margin and not markup — the difference compounds across hundreds of sales. A reseller targeting "50% markup" is actually running a 33% margin, a meaningfully thinner business than they think.

Benchmark margins by business stage

• Below 20% margin: Fragile. A single return, a shipping cost increase, or a fee schedule change can push individual sales negative. Sustainable only at very high volume with tight operations.
• 20-35% margin: Workable for side hustles and part-time resellers. Room for occasional returns and slow movers, but tight enough that fee accuracy matters on every sale.
• 35-50% margin: Healthy for a full-time reselling business. Absorbs platform fee increases, return rates, and seasonal slowdowns without threatening profitability.
• 50%+ margin: Strong — typical for handmade/craft goods (Etsy), vintage finds bought far below resale value, or items with significant brand premium.

Platform-specific margin considerations

eBay: The 13.35% + $0.40 fee means low-priced items ($10-20) take a disproportionate hit from the flat $0.40. Items $30+ are more margin-friendly on eBay's percentage structure.

Etsy: The 6.5% + 3% + $0.25 + $0.20 stack adds up to roughly 9.75-10.5% before offsite ads. Handmade items with high perceived value (low COGS, high price) can sustain 50-70% margins even after fees.

Poshmark: The $15 bracket threshold means margin planning differs sharply above and below that line. Below $15, the flat $2.95 fee is actually higher, in dollar terms, than what Mercari would charge on the same item — see our Mercari vs Poshmark breakdown for the full math. Above $15, the flat 20% is predictable but the heaviest percentage-based cut of the five platforms here.

Amazon: Referral fees (15% standard) plus FBA fulfillment plus advertising can easily consume 35-45% of revenue before COGS. Amazon resellers typically need higher absolute price points to maintain healthy margins after all four cost layers.

Mercari: The ~13% effective rate (10% + 2.9% + $0.50) is predictable and, contrary to older assumptions about Poshmark's low-price fee, tends to preserve margin better than Poshmark at nearly every price point — not just above $15.

Worked example: comparing margin across platforms

Take a $50 item that cost you $15, with $5 shipping cost to you and $0 shipping charged to the buyer:

Amazon assumes 15% standard referral fee, FBM with shipping cost folded into the $5 figure (no separate FBA fulfillment fee modeled). Ranked by margin, highest first. Run your exact numbers in the comparison tool.

Common mistakes that quietly wreck your margin

• Pricing off cost alone, ignoring platform fees. A "50% markup" price can still be a losing sale once a 15-20% platform fee and shipping cost come out — always price backward from your target margin, not forward from cost.
• Averaging margin across your whole shop instead of per-item. A few high-margin bestsellers can mask several near-breakeven or negative-margin items dragging down your real profitability.
• Not re-checking margin after a fee schedule change. Platforms adjust referral and processing rates periodically. An item priced correctly six months ago may now be underpriced for the current fee structure.
• Forgetting returns and chargebacks in the margin math. A 40% margin on paper can be a 30% margin in practice once a realistic return rate is factored in for your category.

Setting your own margin target

A practical approach: decide your target margin (e.g. 40%), then use the pricing calculator to reverse-solve the minimum price for each item given your cost and the platform's fee structure. If the resulting price is unrealistic for the market (too high to sell), either source cheaper inventory or accept a lower margin on that specific item — but track it, so it doesn't silently drag down your overall numbers.