E-Commerce & Marketplace Fees Guide

Every marketplace charges sellers through some combination of these fee types. Understanding the structure matters because the advertised rate — the one you see on the platform's pricing page — almost never reflects your actual cost.

Referral fees are the percentage the marketplace takes from each sale. Amazon charges 8-45% depending on category, with most products falling at 15%. Etsy charges 6.5% transaction fee. eBay charges 13.25% for most categories. These are the fees sellers know about, and they are usually the largest single charge.

Payment processing fees are charged for handling the buyer's payment. Shopify charges 2.9% + $0.30 per transaction on its Basic plan, dropping to 2.4% + $0.30 on Advanced. Etsy charges 3% + $0.25 for Etsy Payments. Amazon buries this in the referral fee — there is no separate payment processing charge. eBay includes payment processing in its final value fee since moving to managed payments.

Subscription or listing fees are fixed costs for using the platform. Amazon Professional sells for $39.99/month. Shopify Basic costs $39/month, Standard $105/month, Advanced $399/month. Etsy charges $0.20 per listing that lasts four months. eBay offers 250 free listings per month for personal sellers, then charges $0.35 per additional listing.

Fulfillment fees apply when the marketplace handles storage and shipping. Amazon FBA charges $3.22 for a small standard item and up to $11.88+ for large oversize items, plus monthly storage fees of $0.87 per cubic foot from January-September and $2.40 per cubic foot October-December. These fees alone can exceed the referral fee for low-priced items.

Advertising fees are technically optional but increasingly necessary. Amazon's average cost-per-click has risen to $1.20-$1.80 depending on category. On competitive products, advertising spend often reaches 10-20% of revenue. Etsy Ads run on a cost-per-click model with a minimum daily budget of $1. Shopify sellers typically spend on Google and Meta ads rather than on-platform advertising.

The combined effect of these layers means your true take rate — the total percentage the platform ecosystem extracts from each sale — is usually 1.5 to 3 times the headline referral fee.

Amazon is the most expensive mainstream marketplace, and also the one with the most complex fee structure. Understanding every layer matters because Amazon now accounts for nearly 40% of US e-commerce.

Referral fees by category. Most categories pay 15% — electronics, home, toys, sports, and general merchandise. Some categories are lower: consumer electronics accessories at 8%, personal computers at 6%, video game consoles at 8%. Some are higher: Amazon device accessories at 45%, jewelry at 20% (with 5% above $250). Fine art tops out at 20% on the first $100, then drops to 15% and 10% for higher amounts.

FBA fees for a typical product. Take a 12-ounce consumer product in standard packaging. The FBA fulfillment fee runs about $3.68. Add monthly storage at $0.87/cubic foot, which for a small item translates to roughly $0.15-0.30 per unit per month. If it sits in Amazon's warehouse during Q4 (October-December), storage jumps to $2.40/cubic foot. Items stored over 271 days incur aged inventory surcharges starting at $0.50 per cubic foot per month.

Worked example — $29.99 product. Referral fee at 15%: $4.50. FBA fulfillment: $3.68. Monthly storage: $0.20. Payment processing: included in referral. Total Amazon fees: $8.38, or 27.9% of the sale price. Add advertising at 12% of revenue ($3.60) and the effective take rate hits 40%. On the $29.99 sale, you keep about $17.90 before product cost.

FBM (Fulfillment by Merchant) eliminates FBA fees but adds your own shipping costs and reduces your Buy Box eligibility. A seller shipping via USPS Priority Mail pays roughly $4-8 per package depending on weight and zone. You trade Amazon's fulfillment fee for your own shipping cost — which can be higher or lower depending on volume discounts.

Amazon fees that catch sellers off guard: inbound placement service fees for splitting inventory across warehouses ($0.27-$1.58 per unit), removal order fees when you want products sent back ($0.97-$1.10 per unit), refund administration fees (20% of the referral fee on returned items, minimum $5), and the low-inventory-level fee for consistently understocking popular items.

Shopify is not a marketplace — it is an e-commerce platform where you build your own store. That distinction matters because Shopify does not bring you customers. You trade lower platform fees for higher customer acquisition costs.

Subscription plans. Basic at $39/month handles everything a new seller needs. Standard at $105/month adds staff accounts and better shipping discounts. Advanced at $399/month provides custom reporting and the lowest transaction rates. Plus starts at $2,300/month for enterprise features.

Payment processing through Shopify Payments. Basic plan: 2.9% + $0.30 per online transaction. Standard: 2.7% + $0.30. Advanced: 2.5% + $0.30. In-person rates are lower at 2.6%, 2.5%, and 2.4% respectively. Using a third-party payment provider adds an additional 2%, 1%, or 0.6% transaction fee on top of whatever the provider charges.

Worked example — same $29.99 product on Shopify Basic. Payment processing: $0.87 + $0.30 = $1.17. Monthly subscription amortized: if you sell 200 orders/month, that is $0.20 per order. Total Shopify fees: $1.37, or 4.6% of the sale price. That is dramatically lower than Amazon's 28-40%. But you need to drive your own traffic.

The customer acquisition gap. Shopify sellers typically spend 15-30% of revenue on paid advertising to generate traffic. Facebook and Instagram ads average $0.50-$2.00 per click with conversion rates of 1-3%. Google Shopping ads run $0.30-$1.50 per click. At a 2% conversion rate and $1.00 CPC, acquiring one customer costs $50. For a $29.99 product, that makes no sense — you need either higher-priced products, repeat purchase behavior, or organic traffic sources.

When Shopify wins over Amazon: products with strong brand identity (customers search for you, not the category), subscription products with high lifetime value, products in Amazon's restricted categories, and businesses where you already have an audience through social media, content, or an email list.

Hidden Shopify costs sellers miss: theme purchases ($150-$400), paid apps for reviews, email marketing, and upsells ($20-$200/month), custom domain ($15/year), and the time investment in managing your own marketing, customer service, and shipping logistics.

Each marketplace has its own fee logic, and the cheapest one depends entirely on what you sell and how much you sell.

Etsy works best for handmade, vintage, and craft supplies. The fee stack: $0.20 listing fee per item (renewed every four months or upon sale), 6.5% transaction fee, 3% + $0.25 payment processing, and an optional 15% Offsite Ads fee on sales generated through Etsy's external advertising (mandatory for sellers earning $10,000+). Total take rate: roughly 10-12% before Offsite Ads, or 22-27% with them. Etsy's advantage is its built-in audience of buyers specifically searching for unique and handmade products — a type of traffic that costs significantly more to generate independently.

eBay charges a final value fee of 13.25% for most categories, which includes payment processing. Additional fees: $0.30 per order, optional promoted listings at 2-20% of the sale price, and $0.35 per listing beyond the free monthly allotment. Total take rate: 13.5-15% without promotion, 15-33% with aggressive promoted listings. eBay works best for used items, collectibles, electronics, and auto parts — categories where its auction and best-offer formats add genuine value.

Walmart Marketplace charges referral fees of 6-20% depending on category, with most falling at 8-15%. No monthly subscription fee. Walmart Fulfillment Services (WFS) charges are competitive with FBA. The catch: getting approved requires an established business with existing e-commerce history, UPC barcodes on all products, and competitive pricing. Walmart's total take rate of 10-18% makes it the cheapest major US marketplace for established sellers.

TikTok Shop charges a 5% referral fee plus 2.86% + $0.30 payment processing. That 8% total take rate is the lowest of any major marketplace with built-in traffic. The tradeoff: your products need to work in a video-first format, and the audience skews young. For impulse-buy products under $50, TikTok Shop is worth testing.

Comparison at $29.99 price point:

- Amazon FBA: ~$8.38 (28%) + ads

- Shopify Basic: ~$1.37 (4.6%) + traffic costs

- Etsy: ~$3.30 (11%) + potential Offsite Ads

- eBay: ~$4.27 (14.2%)

- Walmart: ~$3.00-4.50 (10-15%)

- TikTok Shop: ~$2.40 (8%)

The fee schedule is the beginning, not the end. Several costs consistently blind-side first-time marketplace sellers.

Returns processing. Amazon's average return rate is 5-15% depending on category. Apparel runs 20-30%. When a customer returns a product on Amazon, you lose the outbound FBA fee, potentially pay a return processing fee, and the item may come back unsellable. On a $29.99 item with $8 in marketplace fees, a 10% return rate adds roughly $3.70 in lost fees per returned unit, plus the product cost if the item cannot be resold. Factor a realistic return rate into your per-unit economics from day one.

Currency conversion on cross-border sales. Amazon charges 1.5% on currency conversion when selling on international marketplaces. eBay adds a 3% international fee. Etsy charges 2.5% currency conversion. A US seller on Amazon.co.uk selling a product for 24.99 GBP loses $0.37 to conversion before any other fee. For sellers with significant international revenue, these percentages compound meaningfully.

Inventory aging and storage penalties. Amazon's aged inventory surcharge starts at $0.50/cubic foot for items stored 271-365 days and escalates to $6.90/cubic foot beyond 365 days. A slow-moving product taking up half a cubic foot costs $3.45/month after one year, which can exceed the product's entire profit margin. Seasonal products sent to FBA too early can accumulate hundreds of dollars in storage fees before the selling season begins.

Account-level fees and deductions. Amazon's product liability insurance requirement kicks in once monthly sales exceed $10,000 ($500-$2,000/year depending on product category). eBay's seller performance standards can trigger additional fees for below-standard accounts. Shopify's chargeback fee is $15 per dispute regardless of outcome.

Platform-specific taxes. Marketplace facilitator laws in most US states mean Amazon, eBay, and Etsy collect and remit sales tax automatically — but this increases the buyer's total cost, which can reduce conversion rates on price-sensitive items. International sellers face VAT registration requirements when selling into the EU, UK, or other jurisdictions through these platforms.

Our Platform Commission Calculator helps quantify these layered costs across different marketplaces and product configurations.

The number that matters is not the platform's fee percentage — it is what lands in your bank account after every charge, deduction, and cost is subtracted from the sale price.

The true cost formula:

Net Revenue = Sale Price - Referral Fee - Payment Processing - Fulfillment Cost - Storage Cost - Advertising Cost - Returns Allowance - Subscription (amortized)

Then:

True Profit = Net Revenue - Product Cost (COGS) - Packaging - Inbound Shipping

Worked example — candle business selling a $24.99 candle on Amazon FBA:

Sale price: $24.99

Referral fee (15%): -$3.75

FBA fulfillment: -$3.68

Monthly storage: -$0.22

Advertising (15% of revenue): -$3.75

Returns (5% rate, cost per return $8): -$0.40

Total platform costs: $11.80 (47.2%)

Net revenue: $13.19

Product cost (COGS): -$4.50

Packaging: -$0.80

Inbound shipping to FBA: -$0.65

True profit per unit: $7.24 (29.0% margin)

Same candle on Etsy with self-fulfillment:

Sale price: $24.99

Listing fee: -$0.20

Transaction fee (6.5%): -$1.62

Payment processing (3% + $0.25): -$1.00

Shipping cost (USPS, seller-paid): -$4.50

Advertising (10% of revenue): -$2.50

Returns (3% rate, cost per return $6): -$0.18

Total platform + fulfillment costs: $10.00 (40.0%)

Net revenue: $14.99

Product cost: -$4.50

Packaging: -$0.80

True profit per unit: $9.69 (38.8% margin)

The Etsy seller keeps $2.45 more per candle despite Etsy's seemingly similar fee structure, primarily because FBA fulfillment fees and higher Amazon advertising costs add up. But the Amazon seller might move five times the volume due to Amazon's traffic advantage — making total profit higher on Amazon despite lower per-unit margins.

Volume changes the math. A Shopify seller with strong organic traffic and 500 monthly orders pays roughly 5% in total platform costs. The same seller on Amazon FBA pays 30-40%. At 500 units with $7 gross profit each, the Shopify seller nets $3,500/month in platform fees versus the Amazon seller's $1,750. But if Amazon generates 2,000 monthly orders versus Shopify's 500, Amazon delivers $7,000 in total profit versus Shopify's $3,150.

You cannot negotiate referral fees. But you can structure your business to minimize total platform costs.

Price strategically around fee breakpoints. Amazon's FBA fees increase at specific size and weight thresholds. A product weighing 15.9 ounces pays substantially less in fulfillment than one at 16.1 ounces because it crosses the large standard boundary. Similarly, a product one inch over the small standard dimensions jumps to the next fee tier. Redesigning packaging to stay within cheaper tiers can save $0.50-2.00 per unit.

Reduce advertising dependency. Organic ranking on Amazon depends on sales velocity, reviews, and listing quality. Sellers who invest in keyword-optimized titles, high-quality images, and A+ Content reduce their advertising spend over time as organic placement improves. The goal is advertising at 8-12% of revenue, not 20-30%.

Use multi-channel fulfillment. Amazon MCF lets you fulfill orders from other channels (your website, Walmart, eBay) using your FBA inventory. The fees are higher than standard FBA but lower than shipping from your own warehouse in most cases. This consolidates inventory and reduces total warehousing costs.

Manage inventory velocity. Send inventory in quantities you can sell within 60-90 days. This avoids aged inventory surcharges and reduces storage costs. Use Amazon's Inventory Performance Index (IPI) dashboard to track velocity and identify slow-moving SKUs before they become expensive to store.

Bundle products. Selling a bundle of three items for $39.99 incurs the same per-order FBA fee as a single item at $14.99 but generates nearly three times the revenue. The referral fee stays at the same percentage, but fulfillment and per-order fees are effectively cut by two-thirds relative to selling each item separately.

Consider the Shopify + Amazon hybrid. Many established sellers maintain a Shopify store for repeat customers and brand-building while using Amazon for discovery and volume. First-time buyers find you on Amazon; you include a brand insert encouraging them to buy directly next time. Your Shopify store captures repeat purchases at 5% total cost instead of 30% on Amazon.