Selling on Amazon involves layered fees beyond the monthly subscription: referral commissions, fulfillment costs, storage, advertising, and category-specific charges. Understanding the interplay between plan choice, product economics, and margin structure determines whether the marketplace amplifies or erodes profitability.
Amazon offers two seller accounts: Individual at no monthly fee but $0.99 per item sold, and Professional at $39.99 CAD per month with no per-item charge. The breakeven sits around 40 units monthly; above that threshold the Professional plan costs less and unlocks bulk listing tools, advanced reporting, and eligibility for Buy Box rotation. The Professional tier also opens API integrations and removes category restrictions on restricted brands. If you test fewer than 20 SKUs with uncertain demand, Individual makes sense. Once sales or SKU count climbs, the fixed monthly cost becomes negligible against saved per-transaction fees. Plan choice also signals intent: Professional suggests you're treating Amazon as a primary channel rather than a side experiment.
Every sale incurs a referral fee, Amazon's commission for access to buyers. Rates vary: electronics and office products default to 15%, jewelry climbs to 20%, Amazon Device Accessories hit 45%. Most consumer categories cluster around 15%, but small-item fees add $1.00 per unit if the total sale is under $10 CAD. Clothing and footwear carry tiered structures that drop the percentage as price rises. Books, music, and video remain lower at 15% but often compete with Amazon's own retail arm. When modeling margin, referral fees are the largest predictable cost; a 15% fee on a $50 item is $7.50, so a product with $30 landed cost leaves $12.50 before fulfillment, storage, and ads. Categories with higher percentages require proportionally stronger retail pricing or lower COGS to preserve contribution margin.
FBA shifts logistics to Amazon's warehouses. Fulfillment fees depend on size tier and weight: a standard-size item under 1 lb costs roughly $4-$5 CAD per shipment, while oversized or heavy goods can run $15-$30. Monthly storage is charged per cubic foot—around $0.83 per cubic foot September through December, then drops to $0.56 January through August. Long-term storage fees apply after 365 days, penalizing slow-turn inventory. Dimensional weight can inflate costs if packaging is inefficient; a light but bulky item pays for the space it occupies in the truck. FBA includes customer service and returns handling, which self-fulfilled (FBM) sellers must staff themselves. The tradeoff: FBA units typically win the Buy Box more often, but margin-sensitive or low-velocity SKUs may fare better with third-party 3PL or in-house fulfillment to avoid storage creep.
Sponsored Products, Sponsored Brands, and Sponsored Display let you bid on keywords and placements. Most competitive categories require ad spend to appear above organic results; expecting free discovery in saturated niches is unrealistic. Cost-per-click ranges from $0.30 for longtail terms to $3+ for high-intent commercial keywords. A conservative starting budget is 10-15% of revenue, though launches or seasonal pushes can spike higher. ACOS (Advertising Cost of Sale) expresses ad spend as a percentage of attributed revenue; keeping ACOS below gross margin ensures paid traffic remains profitable. New listings with few reviews often need higher spend to gather velocity; established products can dial back once organic rank stabilizes. Agency services managing Amazon campaigns typically charge flat retainers or percentage-of-spend, adding another layer when internal expertise is absent.
Beyond the headline costs, a series of smaller fees compounds. Inventory placement fees apply if you don't distribute inventory across Amazon's network; removal and disposal fees hit if you need to pull aged stock. High-return categories like apparel incur processing costs when customers send items back. Brand Registry, while free to join, requires a registered trademark—legal costs there run $1,000-$3,000 CAD depending on jurisdiction. A+ Content and Stores are free once enrolled, but producing quality assets (photography, copy, design) is an expense whether handled internally or outsourced. Variations and bundles require separate UPCs or Amazon's GTIN exemption. Refund administration fees claw back part of the referral when a return completes. Individually these are minor, but across dozens of SKUs and hundreds of transactions monthly they erode margin if not tracked granularly in unit economics.
Aggregating all fee layers—subscription, referral, FBA, storage, ads, ancillary charges—typically consumes 30-50% of gross revenue. A $40 product with $18 COGS, 15% referral ($6), $4.50 FBA, $2 in ads, and $1 in storage nets roughly $8.50 before overhead and returns. That 21% contribution margin must cover brand-building, product development, and working capital. High-turn, lightweight items with strong differentiation can achieve healthier economics; heavy, slow, or commoditized SKUs struggle. When evaluating whether Amazon fits your channel mix in 2026, model a representative SKU end-to-end rather than anchoring only on referral percentage. Include peak-season storage surcharges, returns rate by category, and the cost-of-capital tied up in inventory. If total platform fees exceed 50%, you either need pricing power unavailable on Amazon or a customer-acquisition strategy that treats Amazon as a top-of-funnel trial before migrating buyers to owned channels.
The Individual plan charges no monthly fee but adds $0.99 per item sold; the Professional plan costs $39.99 CAD monthly with no per-item fee. Professional also unlocks bulk upload tools, advanced reports, API access, and eligibility for Buy Box on new-condition listings. If you sell more than 40 units a month, Professional becomes cheaper and strategically necessary.
FBA fees depend on size tier and weight. A standard-size item under 1 lb typically costs $4-$5 CAD for pick, pack, and ship. Larger or heavier items can reach $15-$30. Monthly storage is roughly $0.56 per cubic foot off-peak and $0.83 September-December, with long-term fees after 365 days. Dimensional weight matters, so compact packaging reduces cost.
Advertising is not technically mandatory, but highly competitive categories rarely surface new or low-review listings organically. Sponsored Products and Brands let you bid on keywords; budget often starts at 10-15% of revenue. Without ads, you rely on SEO, external traffic, or extremely differentiated products. In practice, most sellers treat ad spend as a baseline channel cost.
Combining subscription, referral fees, FBA, storage, advertising, and ancillary charges usually totals 30-50% of gross revenue. The exact figure depends on category referral rate, product dimensions, ad intensity, and return rates. Lightweight, fast-turning items with strong pricing power land toward the lower end; heavy, slow, or commoditized SKUs push toward or above 50%.
Agency services help optimize listings, manage PPC, and navigate fee structures, but they add cost—typically flat retainers or percentage-of-spend. If you lack internal expertise or manage many SKUs, an agency can improve efficiency and ACOS. For smaller catalogs or teams with e-commerce experience, self-management is viable using Amazon's Seller Central tools and third-party analytics platforms.
Referral fees range from 8% to 45%. Most consumer goods (electronics, home, toys) sit at 15%. Jewelry is 20%, Amazon Device Accessories 45%, and apparel uses a tiered structure. Books, music, and video are 15% but compete with Amazon retail. Small-item fees add $1 CAD if the total price is under $10. Always check the category-specific fee schedule when modeling margin.