FBA Profit Calculator Methodology
Estimates per-unit FBA profit after unit cost, referral fee, closing fee where applicable, Amazon's 2026 FBA fulfillment fee for the size tier, shipping weight and price band (non-peak or holiday peak by date, including the 3.5% fuel and logistics surcharge), and blended storage multiplied by per-product months on hand.
Amazon FBA is active. Other marketplace modules stay marked as planned until audited.
Estimates per-unit FBA profit after unit cost, referral fee, closing fee where applicable, Amazon's 2026 FBA fulfillment fee for the size tier, shipping weight and price band (non-peak or holiday peak by date, including the 3.5% fuel and logistics surcharge), and blended storage multiplied by per-product months on hand.
Fee basis: source-state planning estimate; modeled fee basis is under review and not a Seller Central reconciliation. Last source-state review: 2026-06-07.
planning estimate. Planning estimate — fee basis is source-dated and under review, not a Seller Central reconciliation.
Modeled evidence still current
- fba fulfillment fee 2026 — Verified against source; last verified 2026-10-09.
- referral fee 2026 — Fee basis review is overdue (stale after 2026-10-23); shown as a planning estimate pending re-verification. report_mode
- monthly storage fee — Fee basis review is overdue (stale after 2026-10-23); shown as a planning estimate pending re-verification. report_mode
- fba fuel logistics surcharge 2026 — Included in the FBA fulfillment fee: Amazon applies a 3.5% fuel and logistics-related surcharge to US FBA fulfillment fees from April 17, 2026.
Explicitly excluded
- inbound placement service fee — Excludes Amazon inbound placement service fees (vary by split shipments and placement choices).
- low inventory level fee — Excludes Amazon low-inventory-level fees (depend on your days-of-supply, not modeled here).
Primary source register: Amazon fee schedules · Amazon Revenue Calculator.
Formula
net_profit = selling_price - product_cost - referral_fee - closing_fee - fulfillment_fee - (storage_fee_monthly × months_on_hand)
Includes
- Price-banded referral fee with category-specific minimum; use total sale price including buyer-paid shipping and gift wrap
- Media closing fee where applicable
- Amazon 2026 FBA fulfillment fee by size tier, shipping weight and price band (<$10, $10-$50, >$50), apparel table for apparel
- Non-peak or holiday peak (Oct 15 - Jan 14) rates by date
- 3.5% fuel and logistics-related surcharge on the fulfillment fee from April 17, 2026
- Blended monthly storage estimate
- Per-product months-on-hand storage residence
- Per-unit net margin classification
Excludes
- Inbound Placement Service Fee unless you add it to product cost
- Low-Inventory-Level Fee
- Aged inventory surcharge beyond the storage estimate
- Returns Processing Fee
- Dangerous-goods (hazmat) fulfillment rates
- Ships in Product Packaging discounts and packaging fees
- Overmax handling fee
- PPC/ACoS
- Coupons and promos
- Sales tax/VAT
- Multi-Channel Fulfillment
2026 fee-category audit
| Fee component | Status |
|---|---|
| 2026 baseline FBA fulfillment-fee schedule | included or not applicable |
| Q4 storage seasonal spike | included in inventory storage assumptions |
| Inbound Placement Service Fee | explicitly excluded unless user enters |
| Low-Inventory-Level Fee | explicitly excluded |
| Aged Inventory Surcharge | explicitly excluded |
| Returns Processing Fee | modeled in return cost planning |
| Fuel and logistics-related surcharge (3.5% of FBA fulfillment fees from April 17, 2026) | modeled in fba fulfillment fee |
| PPC / ACoS impact | modeled in break even ad spend |
| Coupons and promotional discounts | explicitly excluded unless user enters |
| Sales tax / VAT pass-through math | explicitly excluded |
| Multi-Channel Fulfillment fee differential | explicitly excluded |
Diagnostic output: Margin status, largest fee component, approximate price floor, max COGS, implied max ACoS before the unit turns negative, and the explicit distinction that FBA months-on-hand is per-product storage residence while aggregate turn rate belongs in the Inventory Carrying Cost calculator.
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