Free Amazon FBA Profit Calculator

How to use this calculator

2026 Amazon FBA fees used here

Three different charging mechanics sit inside one FBA payout, and this calculator keeps them separate because they behave differently. The referral fee is a percentage of the total sales price, set by fee category on Amazon’s pricing page: 15% for most categories, 8% for electronics and computers, 12% for automotive, 17% for clothing above $20 (the band is 5% at $15 or less and 10% up to $20), and 20% for jewelry on the first $250, dropping to 5% above it. Almost every category carries a $0.30 per-item minimum, which this calculator now applies — on a $1.50 add-on item the minimum, not the percentage, is the real fee. The fulfilment fee is not a percentage at all: it is a per-unit charge set by size tier and shipping weight, so a $12 item and a $60 item in the same tier pay the same fulfilment fee. The tier fees prefilled here are approximations — your exact fee is in Seller Central’s Revenue Calculator. Since April 2026 Amazon adds a 3.5% fuel and logistics surcharge on the fulfilment fee in the US and Canada; the checkbox adds it. Storage is charged per cubic foot per month and entered here as your per-unit share; the dedicated storage calculator models it properly, including the October–December peak.

Sources: Amazon’s selling plans and pricing page (referral fees and minimums), checked 10 November 2026. Fulfilment and storage rates vary by product — confirm yours in Seller Central.

Amazon FBA inbound placement fee (2026): what it does to your margin

Amazon's inbound placement fee is the charge most sellers forgot to model. When you create a shipment, Amazon offers three split options: Amazon-optimized (Amazon decides where inventory goes — lowest or no placement fee), partial splits, and minimal splits (fewer destinations, higher per-unit fee). The fee is charged per unit and varies by size tier, and the 2026 schedule made it a bigger line item than many sellers expected.

The trade-off is real: shipping to fewer locations saves on inbound freight but raises the placement fee; shipping to more locations does the opposite. Heavy and bulky products feel it most, because the per-unit fee scales with size tier. Three practical ways to keep it down: use Amazon-optimized splits where your freight cost allows it, consolidate shipments instead of sending dribs and drabs, and — most importantly — model it. The calculator above covers referral, fulfillment, storage and the fuel surcharge; add your per-unit placement fee to the inbound shipping field and it folds straight into your true margin.

FBA vs FBM: which margin is actually better?

FBA wins on the Prime badge and Buy Box share, but stacks fulfillment, storage and placement fees on every unit. FBM keeps Amazon's per-unit fees low, but you pay the shipping and lose Prime eligibility. The honest rule of thumb: fast-moving, standard-size products usually win on FBA; slow-moving, heavy or oversized products often win on FBM. When you're unsure, model both — run your numbers here, then check the break-even calculator to see which model pays for itself first.

Sources: Amazon's published 2026 US FBA fee schedules. Confirm your exact placement fee in Seller Central (Inbound Performance Summary) before pricing.

Worked example: a clothing item, every line costed

Invented round numbers \u2014 type them into the calculator and check us. A clothing item sells for $42. Clothing carries a 17% referral fee: $7.14. It ships in the large-standard tier at $5.20 fulfilment, plus the 2026 fuel & logistics surcharge of 3.5% on that fee: $0.18. Storage adds $0.40 a unit, inbound shipping $1.50, ad spend $5.00, and the product itself cost $13.00. Add the stack: $7.14 + $5.20 + $0.18 + $0.40 + $1.50 + $5.00 + $13.00 = $32.42 of total cost. Net profit: $42.00 \u2212 $32.42 = $9.58 per unit \u2014 a 22.8% margin, and an ROI of 29.5% on the $32.42 each unit ties up.

The number worth memorising is the break-even price the calculator derives from the same stack: $30.46. Below it, this item loses money at a 17% referral rate no matter how many units sell; above it, every sale contributes. Most sellers only discover their floor after a fee change or a PPC spike \u2014 run yours while the price is still yours to choose.

Common FBA profit mistakes

Forgetting the inbound placement fee. Unless your shipments are split the way Amazon wants, placement fees apply per unit received — small per unit, decisive across a full shipment.

Missing the 3.5% fuel & logistics surcharge. It sits on top of the fulfilment fee in the US and Canada at the time of writing, and most spreadsheet templates built before 2026 do not include it.

Modelling storage at January rates all year. Monthly storage roughly triples in October–December. A product that is profitable in March can be a storage loss-maker in November.

Ignoring returns. In return-heavy categories, refunds, return processing and unsellable units belong in the per-unit maths, not in a year-end surprise.

Calculating margin on the list price. Coupons, discounts and deal fees reduce the price the referral fee and margin are actually based on. Model the price buyers really pay.

Worked example: a $32 kitchen product, run through this calculator

Invented round numbers — type them in above and check us. A mid-sized kitchen product sells at $32.00. Product cost plus inbound freight comes to $10.30 a unit, and ad spend is set to zero so the run shows the product’s clean margin before advertising:

That $10.92 is profit before ad spend — and it is the number your break-even ACoS is built from (here, $10.92 ÷ $32.00 = 34.1%). Whether the product itself works is one judgement; whether the advertising is efficient is another. Keep them separate, and run both — the break-even calculator takes the second one.