Amazon FBA Calculator

Amazon FBA fee components

Amazon FBA unit economics stack three big costs on each sale: category referral fee (percentage of sale price, often 8%–15%), FBA fulfillment fee (size tier and weight based), and your landed product cost including inbound shipping to Amazon’s warehouse. Profit ≈ sale price − referral − FBA fulfillment − product cost − inbound shipping. Referral schedules are category-specific — electronics accessories can be 8%, many home goods 15%, apparel varies with price thresholds.

FBA fulfillment fees depend on product dimensions and weight after packaging — Amazon assigns a size tier (small standard, large standard, small oversize, etc.). A lightweight $30 gadget might pay $3.22 fulfillment while a bulky $30 pillow pays far more. Always copy the fulfillment fee from Seller Central’s Revenue Calculator or the FBA fee preview on your listing — guessing averages will wreck thin-margin SKUs.

Referral is calculated on the item sale price; FBA fulfillment is per unit shipped regardless of whether the buyer used Prime free shipping. Monthly inventory storage ( cubic foot per month ) and long-term storage surcharges on aged inventory are not in this per-unit calculator — add them when reviewing quarterly P&L. Returns processing and removal order fees hit categories with high return rates especially hard.

Worked example: $30 sale, 15% referral ($4.50), $4.50 FBA fulfillment from Revenue Calculator, $8 product cost, $1 inbound → Amazon fees $9.00, total cost $18.00, profit ≈ $12.00 (40% margin on sale). Drop sale price to $20 without changing size tier: referral $3.00, fulfillment still $4.50 — margin collapses because fulfillment is sticky while referral scales down.

FBA vs FBM: fulfilling yourself avoids FBA pick-pack fees but you lose Buy Box leverage and Prime badge on most offers. Compare FBA calculator output to self-ship postage plus your labor — many sellers hybridize with FBA for fast movers and FBM for oversized goods.

Multi-channel fulfillment, Remote Fulfillment, and Pan-EU programs use different fee tables. This tool targets US FBA defaults. Amazon Hub, Subscribe & Save discounts, and coupon clipping reduce sale price and therefore referral dollars but fulfillment stays tied to physical size.

Round-trip sanity check: sale − referral − fulfillment − product − inbound = profit. If referral used wrong category rate, entire spreadsheet shifts — verify category in Inventory → Manage All Inventory → fee preview link.

Monthly storage, ads (Sponsored Products), Vine enrollment, aged inventory surcharges, and reimbursement clawbacks are omitted. Calcometry is not affiliated with Amazon — use Seller Central fee schedule and Revenue Calculator as source of truth.

Low-price FBA fees and apparel category tier breaks can reduce referral on inexpensive fashion — check whether your SKU qualifies before using a flat 15% default. Inbound placement service and AWD upstream storage add per-unit inbound costs beyond the shipping line you enter here. Subscribe & Save and coupon clips reduce customer price and referral dollars together.

FBA Small and Light and remote fulfillment programs use different size tables — always paste the fee from Revenue Calculator after you choose the program. Inventory Performance Index and restock limits do not change per-unit referral but can strand storage fees on unsold units. Multi-pack bundles count as one FBA fee per customer shipment when shipped as one unit.

Amazon inbound defect fees and prep service charges hit before the unit ever sells — add expected prep per unit to COGS when comparing FBA vs FBM. Lightning Deals and coupons reduce customer price and referral dollars; fulfillment fee stays tied to size tier unless the SKU moves to a different FBA category.

Sponsored Brands and Sponsored Products ad spend is separate from referral and FBA fulfillment modeled here — add ACOS targets when building unit economics.