Amazon FBA Fee Calculator — True Take-Home After Referral, Fulfillment & Storage (2026)

The four fees that determine whether FBA makes sense

Amazon FBA has four line-item fees and two surcharges that sneak up on the balance sheet. The calculator above rolls them all into a net-per-unit number. Here's what each piece actually costs in 2026.

1. Referral fee — a flat percentage of the sale price

Referral is Amazon's take for the marketplace. It's 15% on most categories, with category exceptions that matter:

• Consumer electronics over $100: 8% — this is the one category where scaling price is rewarded.
• Consumer electronics under $100: 15%.
• Clothing and accessories: 17%.
• Jewelry over $250: 5% (jewelry under $250 is 20%).
• Amazon Device Accessories: 45% — yes, really.
• Grocery over $15: 15%; under $15: 8%.
• Books: 15% plus a $1.80 closing fee per unit.
• Beauty over $10: 15%; under $10: 8%.

Minimum referral is $0.30 per unit. On a $2.99 add-on pack, that's a 10% effective floor.

2. FBA fulfillment fee — size tier × weight

Amazon classifies every SKU into a size tier based on longest side, median side, shortest side, and dimensional weight. The tiers that matter for most DTC brands:

• Small standard: <15 × 12 × 0.75 in, <1 lb. Fulfillment $3.22 (<0.25 lb) to $3.99 (1 lb).
• Large standard: <18 × 14 × 8 in, <20 lb. $4.35 to $6.95+ scaling with weight.
• Small oversize: <60 in longest side, <70 lb. Starts $9.73 plus weight handling at $0.42/lb.
• Medium oversize: <108 in longest, <150 lb. Starts $19.05.
• Large oversize: Over 108 in or over 150 lb. Starts $89.98 — you really don't want to be here.

The tier jumps are the biggest trap. A polybag item that measures 15.1 × 12 × 0.75 in crosses from small-standard into large-standard — fulfillment jumps from $3.99 to $4.99+ on the same unit. Re-engineer packaging to stay in small-standard if you possibly can; a ~$1 savings per unit at 2,500 units/month is $30K/year.

3. Monthly storage — and the October surge

Storage is where most FBA P&Ls get surprised in Q4. 2026 rates:

• Small/large standard: $0.78/cu ft Jan-Sep, $2.40/cu ft Oct-Dec — 3.08x.
• Oversize: $0.56 off-peak, $1.40 peak — 2.5x.

A 0.04 cu ft small-standard unit costs $0.031/mo off-peak and $0.096/mo during peak. Sounds trivial — until you have 8,000 units averaging 45 days of cover. 8,000 × 0.04 × $2.40 × 1.5 months = $1,152 per Q4 quarter per SKU. Multiply by 25 SKUs and it's $28,800/quarter.

Operator rule: ship only 60-75 days of Q4 cover into FBA. Hold the rest at a 3PL and use IPI-aware replenishment.

4. Inbound freight and prep

Not technically an Amazon fee, but it's unavoidable FBA overhead. Typical numbers:

• LTL freight from port to FBA: $0.15-0.35/lb landed, or $0.25-0.65 per small-standard unit.
• Prep (labeling, polybag, bundle): $0.35-1.20 per unit via 3PL prep services.
• FBA Partnered Carrier offers discounted inbound when you use UPS/Amazon freight but requires pre-booked SPD/LTL shipments.
• AWD (Amazon Warehousing & Distribution): Amazon's pre-FBA 3PL. $0.48/cu ft/mo flat storage + $1.50 processing per unit to FBA. Useful for Q4 buffering.

The hidden fees nobody puts in their model

• Long-term storage surcharge: $0.50/cu ft/mo for 181-270 days in FBA; $1.50 for 271-365; $6.90/cu ft/mo or $0.15/unit (whichever is greater) after 365. A $3 unit sitting 14 months is not a $3 unit anymore — it's a liability.
• Returns processing fee: Free for most categories; $1.50-$5 per returned unit on apparel, shoes, watches, and bags starting 2023. Keep return rate under 12% to avoid the aged-return flag.
• FBA Inventory Placement Service: $0.30-$1.30/unit to have Amazon allocate inbound across fulfillment centers for you instead of shipping yourself. Usually not worth it above 200 units per SKU.
• Low-inventory-level fee (new 2024): $0.32-$1.10/unit if you run below a 28-day historical cover. This is why being aggressive on runway without chasing IPI can actually cost you margin.
• Disposal/removal: $0.97 small standard, $1.63 large standard, $3.22 oversize per unit if you pull dead inventory.
• Sponsored Products spend: Not an FBA fee per se, but 90% of FBA sellers run at ACOS 25-40%. Add to fee stack for honest net.

Three real FBA scenarios — what the P&L actually looks like

Scenario A — Supplement gummy, $24.99 retail, small-standard

A clean-ingredient sleep gummy: 0.42 lb packaged, 0.035 cu ft, grocery >$15 category. Unit COGS $5.20 landed (raw + bottle + label + freight + duty). Monthly sales 1,200 units. Season: peak.

Referral: $24.99 × 15% = $3.75. Fulfillment: $3.44 (0.5 lb small-standard). Storage: 0.035 × $2.40 = $0.084. Inbound/prep: $0.55. Sponsored at 22% ACOS = $5.50. All-in fees + ad: $13.32 per unit. Net before overhead: $24.99 − $5.20 − $13.32 = $6.47 (26% margin). Monthly net contribution: $6.47 × 1,200 = $7,764. Analysis: healthy for FBA supplements; peak storage is trivial because unit is small. Levers: push price to $27.99 (category elasticity supports it) adds $2.66 margin per unit = +41% monthly net.

Scenario B — Kitchen gadget, $18.99 retail, large-standard

Silicone egg-bite mold, 1.2 lb packaged, 0.12 cu ft, Home & Kitchen (15%). Unit COGS $3.80. Monthly sales 900 units. Season: off-peak.

Referral: $2.85. Fulfillment: $5.12 (1.2 lb large-standard). Storage: 0.12 × $0.78 = $0.094. Inbound/prep: $0.75. Sponsored at 32% ACOS = $6.08. Total fees: $14.89. Net: $18.99 − $3.80 − $14.89 = $0.30 per unit (1.6% margin). Monthly contribution: $270 — basically break-even. Analysis: <$20 retail + large-standard + 32% ACOS is the FBA death zone. Raise price to $24.99 or bundle as 2-pack at $34.99. At $34.99 single SKU, fees drop as % and net jumps to $5.28 per unit (15% margin) — $4,752/mo net.

Scenario C — Skincare serum, $48 retail, small-standard, peak

30 ml glass bottle in secondary box, 0.55 lb packaged, 0.04 cu ft, Beauty >$10 (15%). COGS $9.80. Monthly sales 2,100 units. Season: peak.

Referral: $48 × 15% = $7.20. Fulfillment: $3.72 (0.75 lb small-standard). Storage: 0.04 × $2.40 = $0.096. Inbound/prep: $0.80. Sponsored at 18% ACOS = $8.64. Total fees: $20.46. Net: $48 − $9.80 − $20.46 = $17.74 (37% margin). Monthly: $37,254. Analysis: premium beauty in small-standard is the best FBA line item. High AGV ($48), low unit volume cost, low storage footprint, defensible ad spend. Levers: optimize ad ACOS to 14% (still high enough for scale) adds $1.92 margin per unit.

When FBA stops being the answer

Five situations where FBM (Merchant Fulfilled) or SFP beats FBA:

• Sale price under $15 with standard fulfillment — fees eat >50%. Either bundle up or go MFN via USPS Ground Advantage at $4.20-$5.50.
• Oversize categories (over 60 in) — FBA pays $9.73-$89.98 base. Your own 3PL on SmartPost or UPS Ground usually lands $7-$25 for comparable dimensions.
• Low-velocity SKUs (<5 units/week) — long-term storage fees will eat you. Move to MFN if you still carry for catalog breadth.
• DG, perishable, or regulated categories — Amazon restrictions plus specialty fees make MFN simpler.
• Bundles and kits you need to control — FBA sometimes co-mingles or disassembles. MFN or an FBA Custom service.

How referral math interacts with price ladders

Every $1 of retail price includes $0.15 referral plus ~$0.01 long-tail. So a $5 price increase nets you $4.20 incremental contribution before ad spend — the 15% haircut is the Amazon tax on top-line. This is why pricing tests on Amazon are asymmetrical: a $2 increase captures 85% flow-through to margin; a $2 decrease costs you only 85% of the gross-margin dollars but often 30-50% more unit velocity. Use the product pricing calculator to sanity-check before experimenting.

IPI (Inventory Performance Index) and the storage cap

Amazon scores sellers 0-1000 on IPI each week. Score below 400 and you get a storage cap that limits total FBA inventory. Levers that move IPI:

• Sell-through rate (30-day velocity vs on-hand). Aim for 2.5+.
• Excess inventory (over 90 days of cover is dinged).
• Stranded inventory (units unsellable due to listing issues). Fix weekly.
• In-stock rate for Buy-Box-winning SKUs.

Protect IPI by trimming aged inventory quarterly (removal orders or liquidation) and keeping sell-through high on A-SKUs.

FBA prep checklist — before you ship inbound

Before every inbound shipment, run through this eight-point checklist. Skipping any of these is the fastest way to eat a $2-$5 per-unit receiving or relabel fee.

1. FNSKU labels on every unit, not the manufacturer barcode. Use Amazon's print service ($0.55/label) if not prepped by your 3PL.
2. Polybags over 5 inches with suffocation warning printed and 1.5-mil minimum thickness.
3. Expiration dates on consumables — MM-DD-YYYY, outside of the unit box, at least 50 days of shelf life inbound.
4. Multi-packs labeled "Sold As Set — Do Not Separate" on the outside polybag.
5. Carton labels (FBA box ID and UPS PRO label if using Partnered Carrier) on the carton's biggest face.
6. Box weight and dim confirmed with a calibrated scale and tape — discrepancies over 10% trigger inbound performance hits.
7. Max 50 lb per carton standard (or heavier with "Team Lift" label).
8. No fragile items shipped in mailers — use double-walled corrugated.

Seasonal playbook — shipping plan by quarter

• Q1 (Jan-Mar): Clear aged inventory from Q4 with removal or liquidation. Set IPI recovery as a goal. Raise min-purchase-quantity from suppliers.
• Q2 (Apr-Jun): Heaviest year for on-hand inventory because storage is cheap. Pre-build Prime Day inventory by mid-June.
• Q3 (Jul-Sep): Inbound Prime Day + BFCM inventory through mid-September. After Sep 20, storage surcharges for Q4 begin accruing.
• Q4 (Oct-Dec): Don't inbound more than 60-75 days of cover. Use AWD or 3PL for overflow. Monitor for stranded units weekly — they bill at peak rates.

The broader fee calculator stack

FBA is one of several marketplace/fee decisions for a scaling DTC brand. Compare the all-in cost against:

• Walmart Marketplace fees — 8-15% referral, WFS fulfillment similar to FBA, often 10-15% cheaper on small-standard.
• Shopify cost calculator — direct-to-consumer channel's effective rate.
• TikTok Shop fees — new alternate with 8% referral and shipping subsidies.
• Etsy fees — relevant if handmade/vintage/print-on-demand.
• Stripe fees — if running MFN with direct checkout.

FAQ

What's the referral fee on Amazon in 2026?

15% on most categories. Consumer electronics over $100 drops to 8%, jewelry over $250 is 5%, clothing is 17%, Amazon device accessories are 45%. Minimum referral $0.30.

How much does FBA storage cost in 2026?

$0.78/cu ft Jan-Sep for standard size, $2.40/cu ft Oct-Dec. Oversize: $0.56 off-peak, $1.40 peak.

What's the FBA fulfillment fee for a 1 lb small-standard?

Approximately $3.99. Tiers: 0.25 lb $3.22, 0.5 lb $3.44, 0.75 lb $3.72, 1 lb $3.99.

Does FBA make sense for items under $15?

Rarely — fees eat 50%+. Bundle into multipack or run MFN via USPS Ground Advantage.

What are aged-inventory surcharges?

$0.50/cu ft/mo at 181-270 days, $1.50 at 271-365, $6.90 or $0.15/unit (greater) after 365.

Should I use FBA or Seller-Fulfilled Prime?

FBA wins for Prime badge and simplicity. SFP makes sense for oversize where FBA fees exceed $25-40/unit and you have a 3PL hitting 99%+ on-time 2-day.

How does the low-inventory-level fee work?

Charged $0.32-$1.10/unit when you run below 28-day historical cover. Introduced 2024 to push sellers toward steadier inbound cadence.

Can I negotiate FBA fees?

No. Fee schedule is published and uniform. What you can negotiate is inbound freight (with your freight forwarder), prep services (with your 3PL), and sometimes Amazon Vendor Central terms if you're invited.