How is the Amazon FBA fulfillment fee calculated?

It is a flat per-unit charge determined by the product's size tier, its shipping weight and, since 15 January 2026, its selling price. Amazon assigns a size tier from the packaged dimensions and weight, then looks up the fee for that tier, weight band and price band — under $10, $10 to $50, or over $50. A small standard unit at 2 oz costs $3.32 in the $10–$50 band and $2.43 under $10; a large standard unit at 2 lb costs $5.82. Add 3.5% to any of these for the fuel and logistics surcharge.

What are the Amazon FBA size tiers?

There are four main groupings for the US marketplace. Small Standard is up to 16 oz and 15 × 12 × 0.75 inches. Large Standard is up to 20 lb and 18 × 14 × 8 inches. Large Bulky is up to 50 lb and 59 × 33 × 33 inches with longest side plus girth of 130 inches or less. Extra-Large covers anything beyond that, split into weight bands at 50, 70 and 150 lb.

What is billable weight?

For Large Bulky and Extra-Large tiers, Amazon charges on the greater of the actual unit weight or the dimensional weight, calculated as length × width × height ÷ 139. This means a light but bulky item is charged as though it were heavier. Standard-size tiers are charged on unit weight.

Is there a 3.5% surcharge on FBA fulfillment fees?

Yes. Amazon applies a fuel and logistics-related surcharge of 3.5% to all FBA fulfillment fees in the US and Canada, effective 17 April 2026, extended to Multi-Channel Fulfillment and Buy with Prime on 2 May. It is not built into the published rate card, so the figure you see quoted anywhere — including the tables on this page — needs multiplying by 1.035 to get what you are actually billed. Amazon calls the surcharge temporary but has published no end date.

Is there a peak season FBA fee surcharge?

Yes. Holiday peak fulfillment fees run from 15 October 2026 to 14 January 2027 and average roughly $0.32 more per unit in the US (about CAD $0.39 in Canada). It is not a flat band surcharge — Amazon publishes a full peak rate card, so the increase scales with size and weight: about $0.19 on a 2 oz small standard unit, around $0.39 on a t-shirt and several dollars on heavy oversize. The 3.5% fuel and logistics surcharge applies on top, and it lands in the same quarter as peak storage rates.

What is Low-Price FBA?

Since 15 January 2026 it is no longer a separate discount but the under-$10 column of the fulfillment rate card, worth roughly $0.86 less per unit on average. A small standard item at 2 oz costs $2.43 under $10 against $3.32 in the $10–$50 band. It applies automatically based on your selling price, which means crossing above $10 raises your fulfillment fee as well as your referral fee.

Do apparel products pay a higher FBA fee?

Yes. Apparel pays roughly $0.40 more per unit than the non-apparel rate for the same size and weight tier, reflecting higher handling and return rates in the category.

Amazon FBA Fulfillment Fees 2026: Rates by Size Tier

Scope: the rates on this page are for the US marketplace (Amazon.com), in USD. Amazon publishes a separate fee schedule and currency for every other marketplace, so these figures do not carry over to the UK, Germany, Japan or elsewhere. SellerGuards tracks 13 marketplaces and applies each one's own fee schedule to your orders automatically — this page documents the US rates specifically.

What the fulfillment fee covers

The FBA fulfillment fee pays for picking, packing, shipping, customer service and returns handling. It is charged per unit shipped, and it is driven entirely by physical characteristics — size tier and weight — and, since 15 January 2026, by selling price band as well.

The banding softens that but does not remove it: a $3.96 fee is trivial on a $40 product and painful on a $12 one, and why the fee is often the deciding factor in whether a low-priced product can work on FBA at all.

Size tier definitions

Size tier	Max weight	Max dimensions
Small Standard	16 oz (1 lb)	15" × 12" × 0.75"
Large Standard	20 lb	18" × 14" × 8"
Large Bulky	50 lb	59" × 33" × 33"; longest side + girth ≤ 130"
Extra-Large (0–50 lb)	50 lb	Exceeds Large Bulky limits
Extra-Large (50–70 lb)	70 lb	Same
Extra-Large (70–150 lb)	150 lb	Same
Extra-Large (150+ lb)	Unlimited	Same

Billable weightFor Large Bulky and Extra-Large tiers, the charge is the greater of actual unit weight or dimensional weight (L × W × H ÷ 139). A light, bulky product is billed as if it were heavy.

Small Standard rates (US, non-apparel)

Since 15 January 2026 the rate card is banded by selling price as well as weight. The under-$10 column is what used to be called Low-Price FBA; it is no longer a separate programme but a column on the same card. Weight is measured in 2-oz intervals for small standard and 4-oz for large standard.

All figures below are Amazon's published rates. Add the 3.5% fuel and logistics surcharge to get what you are actually billed.

Shipping weight	Under $10	$10 – $50	Over $50
≤ 2 oz	$2.43	$3.32	$3.58
2–4 oz	$2.49	$3.42	$3.68
4–6 oz	$2.56	$3.45	$3.71
6–8 oz	$2.66	$3.54	$3.80
8–10 oz	$2.77	$3.68	$3.94
10–12 oz	$2.82	$3.78	$4.04
12–14 oz	$2.92	$3.91	$4.17
14–16 oz	$2.95	$3.96	$4.22

Large Standard rates (US, non-apparel)

Shipping weight	Under $10	$10 – $50	Over $50
≤ 4 oz	$2.91	$3.73	$3.99
4–8 oz	$3.13	$3.95	$4.21
8–12 oz	$3.38	$4.20	$4.46
12–16 oz	$3.78	$4.60	$4.86
1–1.25 lb	$4.22	$5.04	$5.30
1.25–1.5 lb	$4.60	$5.42	$5.68
1.5–1.75 lb	$4.75	$5.57	$5.83
1.75–2 lb	$5.00	$5.82	$6.08
2–2.25 lb	$5.10	$5.92	$6.18
2.25–2.5 lb	$5.28	$6.10	$6.36
2.5–2.75 lb	$5.44	$6.26	$6.52
2.75–3 lb	$5.85	$6.67	$6.93
3–20 lb	$6.15 + $0.08 / 4 oz	$6.97 + $0.08 / 4 oz	$7.23 + $0.08 / 4 oz

Large Bulky & Extra-Large rates

⚠ This table has not been restructured for 2026 yetThe 15 January 2026 change also split Large Bulky into a new Small Bulky tier (longest side 18–37 in, 20–50 lb, roughly 21–23% cheaper) and a narrower Large Bulky. Published sources disagree on where the new boundary sits, so rather than print a tier definition that might route you to the wrong rate card, these rows are left as the pre-split figures. Confirm bulky and extra-large rates in Seller Central.

Size tier	Base fee	Per lb above threshold
Large Bulky (≤50 lb)	$9.73	+ $0.42/lb above 1 lb
Extra-Large 0–50 lb	$26.33	+ $0.38/lb above 1 lb
Extra-Large 50–70 lb	$40.12	+ $0.75/lb above 51 lb
Extra-Large 70–150 lb	$54.81	+ $0.75/lb above 71 lb
Extra-Large 150+ lb	$194.95	+ $0.19/lb above 151 lb

Surcharges and discounts on top

Fuel and logistics-related surcharge: +3.5% on every fee below. Applied from 17 April 2026 to all FBA fulfillment fees in the US and Canada, and to Remote Fulfillment into Canada, Mexico and Brazil. It is not included in the rate tables above — Amazon publishes the rate card without it and adds 3.5% at billing, so multiply any published fee by 1.035. Multi-Channel Fulfillment and Buy with Prime joined on 2 May 2026. Amazon describes it as temporary but has set no end date. The 2026 fee change timeline shows how it stacks with January's restructure and the holiday peak card.
Apparel surcharge: roughly $0.40 more per unit than the non-apparel rate for the same size and weight.
Holiday peak fulfillment fees (15 Oct 2026 – 14 Jan 2027): a separate peak rate card, averaging about $0.32 more per unit in the US and CAD $0.39 in Canada. The increase scales with size and weight rather than being flat — roughly $0.19 on a 2 oz small standard unit, about $0.39 on a t-shirt, and several dollars on heavy oversize. The 3.5% surcharge applies on top, and it coincides with peak storage rates, so Q4 gets hit twice. It also covers Remote Fulfillment, MCF and Buy with Prime.
Low-Price FBA is now the under-$10 column. It is built into the rate card above rather than applied as a separate discount, and averages roughly $0.86 less per unit. A 2 oz small standard item costs $2.43 under $10, against $3.32 in the $10–$50 band.

⚠ The rate tables on this page exclude the 3.5% surchargeThey show Amazon's published rate card, which is what Seller Central and every fee guide quotes. Your actual charge is 1.035× those figures. On a $5.00 fulfillment fee that is $5.18 — small per unit, and $1,800 a year at 1,000 units a month.

The $10 cliffCrossing from $9.99 to $10.49 raises the referral fee and moves you out of the under-$10 column. On a 2 oz small standard item the fulfillment fee alone goes from $2.43 to $3.32 — $0.89 of extra cost for $0.50 of extra revenue, before the referral fee even changes.

Why the tier boundary matters more than the rate

Within a tier, the steps are small — a few cents per weight band. Between tiers they are not. A product at 16.1 oz is Large Standard rather than Small Standard, and the fee moves from $3.96 to $5.04 in the $10–$50 band: $1.08 per unit for one tenth of an ounce.

The same applies to dimensions. Small Standard tops out at 0.75 inches thick; a package at 0.8 inches is charged as Large Standard regardless of weight. Before finalising packaging, check which side of each boundary you land on — reducing box thickness by a fraction is among the cheapest margin gains available.

Work out the full picture for a specific product — fulfillment, referral, storage and cost of goods together — with the FBA profit calculator, which detects the size tier automatically. For every other Amazon charge, see the complete guide to Amazon seller fees.

Amazon FBA Fulfillment Fees