Reseller Profit Margin Calculator: Margin and Markup on a Resale
Work out the profit margin, markup, and gross profit on a resale item from your buy cost and sell price — the numbers that tell a reseller whether a flip is worth the effort and how to price the next one.
Adjust the inputs and select Calculate for a full breakdown.
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Profit margin | Markup | Profit |
|---|---|---|---|
| $18 cost · $45 price (60%) | 60.00% | 150.00% | $27.00 |
| $5 cost · $20 price (75%) | 75.00% | 300.00% | $15.00 |
| $60 cost · $90 price (33%) | 33.33% | 50.00% | $30.00 |
| $120 cost · $150 price (20%) | 20.00% | 25.00% | $30.00 |
How This Calculator Works
Enter your selling price and your cost of goods. The calculator returns gross profit in dollars, the margin as a percent of the selling price, and the markup as a percent of your cost. For a true picture, fold platform and shipping fees into your cost or subtract them from the price first.
The Formula
Profit Margin and Markup
Markup = (Revenue − Cost) / Cost × 100 — the same profit measured against cost instead of revenue
Worked Example
Buy an item for $18 and sell it for $45 and you make $27 gross profit — a 60% margin and a 150% markup. That sounds great until platform fees (often 10% to 15%), shipping, and your time come out of it. Resellers commonly aim for high markups precisely because fees and the occasional dud erode the headline number — a 150% markup can shrink to a thin real margin after a marketplace's cut and the cost of items that don't sell.
Key Insight
Reselling math is deceptive because the markup looks huge but the real margin is eaten by costs that don't show up in the buy price. Three things separate profitable resellers from hobbyists: counting all costs (platform fees, payment processing, shipping, supplies, returns) before celebrating the markup, pricing on the slow-moving inventory and duds that never sell (your winners have to cover them), and valuing your time — sourcing, listing, and shipping hours are real labor. A 60% margin on a single item is meaningless if you only sell a few a month; the business works when the margin holds across volume after every fee is counted.
Reselling segments + platform economics
THRIFT FLIPPING.
Substantial — substantial Goodwill, estate sales, garage sales.
Substantial — substantial COGS $0.50-$10/item.
Substantial — substantial retail $15-$100+.
Substantial — substantial gross 70-90%.
Substantial — substantial substantial time intensive.
Substantial — substantial 1-3 hours per item averaged (source + clean + photograph + list).
RETAIL ARBITRAGE.
Substantial — substantial buy retail (Target clearance, Walmart).
Substantial — substantial resell Amazon, eBay.
Substantial — substantial Amazon FBA substantial.
Substantial — substantial 30-60% gross margins.
Substantial — substantial substantial volume scale.
ONLINE ARBITRAGE.
Substantial — substantial similar but online sources.
Substantial — substantial Slickdeals, RetailMeNot.
Substantial — substantial substantial substantial.
WHOLESALE / LIQUIDATION.
Substantial — substantial pallets, lots.
Substantial — substantial B-Stock, Liquidation.com.
Substantial — substantial $500-$10K+ pallets.
Substantial — substantial substantial substantial risk.
BRANDED RESELLING (sneakers, electronics).
Substantial — substantial Nike Dunks, Yeezys, iPhones.
Substantial — substantial COGS $50-$300.
Substantial — substantial retail $100-$1,000+.
Substantial — substantial gross 25-50%.
Substantial — substantial StockX, GOAT, eBay primary platforms.
Substantial — substantial authentication substantial.
Substantial — substantial substantial substantial fees ~10-15% StockX seller fee + payment processing.
VINTAGE / DESIGNER.
Substantial — substantial substantial substantial substantial substantial premium.
Substantial — substantial The RealReal, Vestiaire Collective.
Platform fees + scaling + tax
EBAY.
Substantial — substantial 13.25% final value fee most categories.
Substantial — substantial first 250 listings/month free.
Substantial — substantial Promoted Listings 2-15%.
Substantial — substantial Top Rated Plus discount.
POSHMARK.
Substantial — substantial 20% above $15.
Substantial — substantial $2.95 flat below $15.
Substantial — substantial fashion + accessories focus.
MERCARI / DEPOP.
Substantial — substantial 10% + processing.
Substantial — substantial young demographic.
STOCKX.
Substantial — substantial Level 1 9% seller fee → Level 5 5%.
Substantial — substantial Level based on annual sales.
Substantial — substantial + 3% payment processing.
Substantial — substantial authentication included.
Substantial — substantial substantial sneakers + streetwear.
GOAT.
Substantial — substantial 9.5-19% commission (tier-based).
Substantial — substantial substantial substantial.
AMAZON FBA.
Substantial — substantial 15% referral most categories.
Substantial — substantial fulfillment fee per unit.
Substantial — substantial monthly storage fees.
Substantial — substantial substantial scale.
Substantial — substantial substantial substantial.
FACEBOOK MARKETPLACE.
Substantial — substantial 5% sold sales (shipped).
Substantial — substantial local pickup free.
Substantial — substantial growing platform.
SHIPPING substantial.
Substantial — substantial USPS Priority Mail.
Substantial — substantial eBay / PayPal shipping discounts substantial.
Substantial — substantial Shippo, Pirate Ship.
Substantial — substantial 30-50% retail shipping savings.
TAX 1099-K substantial.
Substantial — substantial federal threshold $5K 2024.
Substantial — substantial transitioning $600 (delayed).
Substantial — substantial Schedule C.
Substantial — substantial self-employment tax 15.3%.
Substantial — substantial sales tax substantial — marketplace facilitator most states.
Substantial — substantial substantial substantial substantial.
SCALING.
Solo. $5-$50K/year typical.
Established 6-figure. $100-$300K/yr.
Multi-employee operation. $300K-$2M+.
Substantial — substantial substantial substantial.
AUTHENTICATION substantial.
Substantial — substantial counterfeits substantial substantial.
Substantial — substantial StockX, GOAT verification substantial.
Substantial — substantial substantial substantial.
Substantial — substantial substantial substantial IP risk.
Substantial — substantial DMCA / lawsuit substantial.
RETURNS.
Substantial — substantial 10-25% e-commerce.
Substantial — substantial substantial substantial substantial.
U.S. reseller profit margin benchmarks (2024)
Reference margins by segment + platform.
| Segment / Platform | Gross margin | Platform fee |
|---|---|---|
| Thrift flipping | 70-90% | Platform-specific |
| Retail arbitrage | 30-60% | Amazon 15% + fulfillment |
| Branded reselling (sneakers) | 25-50% | StockX 5-9%, GOAT 9.5-19% |
| Vintage / designer | 40-70% | TheRealReal 20-30% |
| Wholesale / liquidation | 30-60% | Variable |
| eBay fee | — | 13.25% + Promoted 2-15% |
| Poshmark fee | — | 20% above $15 |
| Mercari / Depop fee | — | 10% |
| Amazon FBA referral | — | 15% + fulfillment + storage |
| 1099-K threshold (federal 2024) | $5K | — |
| Returns rate | 10-25% | — |
| Solo reseller annual revenue | $5-$50K | — |
Time investment substantial — sourcing + listing + shipping. Platform fees stack (eBay 13.25% + payment + Promoted). StockX/GOAT authentication substantial for high-value. 1099-K threshold federal $5K 2024 (transitioning $600). Sales tax marketplace facilitator most states. Counterfeit IP risk substantial. eBay + Poshmark + StockX fee data.
Frequently Asked Questions
How is reseller profit margin calculated?
Gross profit is the selling price minus your cost; margin is gross profit divided by the selling price, times 100. Buy at $18, sell at $45, and you have $27 profit — a 60% margin and a 150% markup.
What's the difference between margin and markup?
Margin is profit as a percent of the selling price; markup is profit as a percent of your cost. The same $27 on an $18 cost is a 150% markup but only a 60% margin. Resellers often quote markup (it's bigger) but profitability is driven by margin.
Do platform and shipping fees count?
They should. Marketplace fees (often 10% to 15%), payment processing, shipping, and supplies all reduce your real profit. Either subtract them from the selling price or add them to your cost before reading the margin — otherwise the figure overstates what you actually keep.
What margin should a reseller target?
High — resellers often aim for markups of 100%+ (50%+ margins) because fees, returns, and unsold inventory erode the headline number. There's no universal target, but pricing thin leaves no room for the costs that inevitably appear, so build in cushion.
Why price for unsold items?
Because not everything sells. Some inventory sits, gets marked down, or never moves — and your profitable flips have to cover those losses. Pricing each item as if it'll definitely sell at full price ignores the duds, which is how resellers end up busy but not profitable.
When is this calculator unreliable?
Less reliable when labor time not allocated (sourcing + listing + shipping substantial 1-3 hrs/item averaged), when platform fees stack (eBay 13.25% + payment processing + Promoted Listings 2-15%), when returns/refunds substantial (10-25% e-commerce), when shipping included or extra differs, when supplies (boxes, polymailers) not allocated, when authentication services for high-value (StockX 5-9%, GOAT 9.5-19%) different economics, or when IP / counterfeit risk substantial (DMCA / lawsuit).
References & Authoritative Sources
- eBay seller fees — Selling Fees Schedule · consulted June 1, 2026 · Marketplace fees
- Poshmark / Mercari / StockX — Platform fee schedules · consulted June 1, 2026 · Marketplaces
- U.S. IRS — 1099-K Reporting + Hobby vs Business · consulted June 1, 2026 · Federal tax
Related Calculators
Methodology & Review
Reseller margin = (revenue − COGS − platform fees − shipping) / revenue. Thrift flipping: COGS $0.50-$10/item; retail $15-$100+; gross margin 70-90%. Branded reselling (sneakers, electronics): COGS $50-$300; retail $100-$1,000+; gross 25-50%. Net margin 15-40% after fees, time, returns. RELIABILITY: Reliable for documented unit costs. Less reliable when (a) labor time not allocated (sourcing + listing + shipping); (b) platform fees stack (eBay 13.25% + payment processing); (c) returns/refunds substantial (10-25% e-commerce); (d) shipping included or extra; (e) supplies (boxes, polymailers); (f) authentication services for high-value (StockX, GOAT); (g) IP / counterfeit risk.
Updated