Amazon FBA Calculator

An Amazon FBA calculator shows your true per-unit profit after Amazon's cuts. Sell a $29.99 product with a 15% referral fee ($4.50), a $5.61 FBA fulfillment fee (2026 rate for a large standard item of 1.25 to 1.5 lb, including the 3.5% surcharge), a $7.50 product cost and $1.00 inbound shipping, and you keep $11.38: a 37.9% net margin and roughly 134% ROI on each unit. That gap between the sticker price and what lands in your account is exactly what this tool exists to show, and the 2026 fee table below turns it into an FBA fee calculator for any size and weight.

Related tools cover the pieces around this one: the Margin Calculator turns any cost and price into a margin, the Markup Calculator sets a price from a target markup, the Profit Margin Calculator compares gross vs. net margin across a whole business, and the Freight Class Calculator estimates the LTL shipping class that drives your inbound freight cost to Amazon. Use this FBA page for the full per-unit fee-and-profit picture.

How FBA profit is calculated

The math is a straightforward subtraction once you know each piece:

The referral fee is a percentage of the selling price (15% in most categories, with a $0.30 minimum per item in most). The fulfillment fee is a per-unit charge based on the product's size tier, shipping weight and price band. Product cost is what you pay your supplier per unit (COGS), and other costs bundle inbound shipping, prep, PPC, storage and returns. From net profit, two ratios tell the real story, the same two you would compute for any product on the Margin Calculator or Profit Margin Calculator:

Amazon's two main fees explained

FBA sellers pay two charges on almost every sale. The referral fee is Amazon's commission for the sale itself, charged as a percentage of the total price including any shipping you collect. The FBA fulfillment fee pays for Amazon to pick, pack and ship the order and to handle customer service and returns for that unit. Crucially, the referral fee scales with price while the fulfillment fee is set mostly by size and weight (with a step between price bands), so a cheap, heavy item can be eaten alive by fulfillment costs while an expensive, small item gives most of its fee budget to the referral fee.

2026 FBA fulfillment fees for standard-size items

Amazon's 2026 US rate card took effect on January 15, 2026 (an average increase of $0.08 per unit for standard-size items priced $10 to $50). The fee depends on the size tier, the shipping weight and the item's price band. Holiday peak fees apply from October 15, 2026 to January 14, 2027, based on the date the unit ships. Use the row for your product as the fulfillment fee input:

Source: Amazon Seller Central, "2026 US FBA fulfillment fee changes" (non-apparel, non-dangerous goods). Non-peak rates apply January 15 to October 14, 2026; the peak column applies October 15, 2026 to January 14, 2027. A 3.5% fuel and logistics surcharge applies on top of these fees from April 17, 2026 (for example $5.42 becomes about $5.61). Items priced exactly $10 or $50 use the $10 to $50 rates. Apparel, dangerous goods and bulky items have separate rate cards.

Two details trip up many sellers. First, large standard and bulky items are charged on the greater of unit weight and dimensional weight, which Amazon calculates as length × width × height in inches divided by 139, so a light but boxy product can land in a heavier row. Second, a price change can move an item between bands: a product repriced from $10.49 to $9.99 drops into the cheaper under-$10 column, while one raised above $50 pays the higher over-$50 rate.

How to use this FBA calculator

You only need a few numbers to get a realistic profit estimate. Work through the fields in order:

1. Selling price: enter your list price (or planned price). This is the figure Amazon's referral fee is calculated against.
2. Product cost (COGS): the all-in per-unit cost from your supplier.
3. Referral fee %: use your category's rate. Tap the 8% / 15% / 17% quick buttons or type an exact value; the calculator applies the $0.30 minimum automatically.
4. FBA fulfillment fee: enter the per-unit fee for your product's size tier, weight and price band from the 2026 table above, plus the 3.5% surcharge.
5. Shipping & other costs: add per-unit freight to Amazon, plus PPC, prep, storage and returns.

Results update as you type: read your net profit per unit at the top, then check the margin, ROI, fee breakdown and break-even price below. If an entry is invalid (a price of $0 or a negative cost, for example), the calculator says what to fix.

Who this calculator is for

Anyone trying to turn a selling price into a real profit number benefits from running it. That includes:

• Product researchers vetting a potential winner before placing a first order.
• Private-label sellers pricing a new launch and stress-testing it against PPC and returns.
• Online arbitrage and wholesale sellers checking whether a buy box price still leaves a profit after fees, then setting a resale price with the Markup Calculator.
• Existing sellers re-pricing inventory after the 2026 fee changes, the fuel and logistics surcharge or rising freight costs.
• Anyone budgeting who wants the true per-unit economics, not just the headline price.

Worked example: a healthy private-label product

Take a $29.99 kitchen gadget in the large standard-size tier with a 1.25 to 1.5 lb shipping weight. The referral fee at 15% is $4.50, the fulfillment fee is $5.61 ($5.42 plus the 3.5% surcharge), the product costs $7.50 from the supplier, and inbound shipping is $1.00 per unit. Net profit is $29.99 − $4.50 − $5.61 − $7.50 − $1.00 = $11.38. That is a net margin of about 37.9% and an ROI of about 134% on the $8.50 invested per unit. Even after adding, say, $3.00 of PPC and $0.50 of storage as "other costs," the unit still nets $7.88, a workable product.

Amazon FBA fee breakdown: where a $29.99 sale goes

This step-by-step table follows a single $29.99 sale from the top line down to take-home, subtracting each cost in order. It shows both the "checkout" profit (after Amazon's two fees, product cost and freight) and the real profit once a PPC and storage buffer is applied.

Computed with net profit = price − referral − fulfillment − COGS − other costs. PPC and storage are example figures you should replace with your own per-unit numbers.

Worked example: a low-price product that barely breaks even

Now take a $12.99 item that is light but large-standard size (1 to 1.25 lb), so its fulfillment fee is $5.22 ($5.04 plus the surcharge). The 15% referral fee is $1.95, the product cost $4.00 and inbound shipping $0.80. Net profit is $12.99 − $1.95 − $5.22 − $4.00 − $0.80 = $1.02, a 7.9% margin before a single dollar of advertising. Add $2.00 of PPC and the unit loses $0.98. This is the classic trap of cheap products: the fulfillment fee is too large a share of a low price.

Worked example: a high-ticket product

An $89.99 product weighing 4 lb lands in the over-$50 band, where the 2026 large standard fee is $7.23 for the first 3 lb plus $0.08 for each 4 oz above it: $7.55, or $7.81 with the surcharge. With a 15% referral fee of $13.50, a $28.00 product cost and $3.00 shipping, it nets $89.99 − $13.50 − $7.81 − $28.00 − $3.00 = $37.68, a 41.9% margin and a 122% ROI. Higher-priced items often carry healthier dollar profits, but they tie up more cash per unit and the referral fee (not fulfillment) becomes the dominant Amazon cost.

How much do you make on Amazon FBA by selling price?

This matrix shows net profit, margin and ROI across common price points, holding the model constant so you can see how the same product economics scale. It assumes a 15% referral fee, the $5.61 fulfillment fee from the example (all prices shown fall in the $10 to $50 band), product cost at 30% of price, and $1.00 inbound shipping per unit.

Illustrative model. Because the fulfillment fee is a fixed $5.61 here, low-price units keep the smallest share; the bottom of the pricing range is where thin FBA margins live. Enter your own fees above for a real result.

What is the break-even price for an FBA product?

The break-even price is where net profit hits zero. Because the referral fee is a percentage of price, it uses break-even = fixed costs ÷ (1 − referral %), where fixed costs are fulfillment fee + product cost + shipping + other. Find your total per-unit fixed cost in the left column and read across to your category's referral rate.

Any selling price below the figure shown loses money on every unit. Add a PPC and returns buffer into fixed costs before you treat a price as safe. For very cheap items the $0.30 minimum referral fee takes over, so break-even becomes fixed costs plus $0.30.

Referral fees by category (2026)

Referral percentages vary by category, and some categories use price tiers. These rates are as listed on Amazon's US pricing page in October 2026; always confirm your exact category in Seller Central.

Source: Amazon, sell.amazon.com/pricing (October 2026). The calculator applies one percentage to the whole price, so for tiered categories enter the rate that applies at your price and check Seller Central for how the tiers are applied.

Key FBA terms explained

• COGS (cost of goods sold): your per-unit product cost from the supplier, ideally including factory-gate freight.
• Referral fee: Amazon's sales commission, a percentage of the total selling price.
• Fulfillment fee: the per-unit charge for Amazon picking, packing and shipping the order.
• Size tier: Amazon's classification of a product by dimensions and weight (small standard, large standard, bulky, extra-large), which sets the fulfillment fee together with weight and price band.
• Dimensional weight: length × width × height ÷ 139; Amazon uses it instead of unit weight when it is larger, for every tier except small standard and extra-large 150+ lb.
• ACoS / PPC: advertising cost; on Amazon, sponsored-ad spend that eats into per-unit profit and belongs in "other costs."
• Break-even price: the lowest price at which net profit is zero, given your costs and referral percentage.

What changes your FBA profit the most

If you adjust the inputs and watch the profit move, a few factors dominate:

• Product cost: the single biggest lever you control; negotiating COGS down flows straight to profit.
• Fulfillment fee: driven by size, weight and price band; shrinking packaging into a lighter row can save real money per unit.
• Selling price: raising price lifts profit but also raises the referral fee, can cut conversion, and can move the item into a different fulfillment price band.
• Referral percentage: a category at 8% versus 15% changes the math substantially on the same price.
• PPC and returns: often the difference between a model that "works" on paper and one that actually does.

How the result is used in real life

The net profit and margin from this calculator are the numbers to use when you decide whether to source a product, how aggressively you can price against competitors, and how much room you have for advertising. A practical approach is to set your own minimum margin and ROI (for example, 20% margin and 100% ROI after PPC) and reject any product that cannot clear it with a realistic buffer. The break-even price tells you the floor below which a sale or coupon turns into a loss, which is useful when planning Prime Day or clearance pricing.

Limitations and assumptions

This calculator is a planning estimate, not an official Amazon quote. Keep these assumptions in mind:

• The fulfillment fee is user-entered; the calculator does not look up your size tier, and Amazon's rate cards change over time and by season.
• It models one unit; it does not spread the $39.99 monthly Professional selling plan fee across your volume.
• Storage fees (monthly and aged inventory) and PPC belong in "other costs"; they are not added automatically.
• It does not model returns in detail; returned units may come back unsellable, and Amazon charges a returns processing fee on some products with high return rates.
• It excludes sales tax and income tax; net profit here is pre-tax operating profit per unit.

How it compares to related calculators

This page answers "what do I actually keep on this Amazon sale?" If your question is different, a sister tool fits better:

• To work out margin from cost and price on any product, use the Margin Calculator.
• To set a selling price from a target markup, use the Markup Calculator.
• To compare gross and net profit margins across a business, use the Profit Margin Calculator.
• To find the unit volume that covers your fixed costs, use the Break-Even Calculator.
• To add the sales tax a buyer pays at checkout, use the Sales Tax Calculator.
• To price your own labor when you prep or pack, use the Hourly to Salary Calculator.

FBA vs FBM: which is cheaper per unit?

Fulfillment by Amazon (FBA) is not your only option. With Fulfillment by Merchant (FBM), you store the inventory and ship each order yourself, so you skip the FBA fulfillment fee entirely, but you still pay the referral fee, and you take on packaging, postage and customer service. The right choice is a per-unit math problem, and this calculator helps you model the FBA side of it. For a small, light product, the FBA fulfillment fee is low and the Prime badge plus hands-off logistics usually win. For a large, heavy or slow-moving product, the fulfillment fee and storage charges can swallow the margin, and FBM (or a hybrid) may net more per unit.

To compare honestly, run the product through this calculator twice. First, model FBA with the real fulfillment fee for your size tier. Then model FBM by setting the fulfillment fee to zero and entering your actual per-order shipping, packaging and pick-and-pack labor under "other costs." Whichever path yields the higher net profit after a realistic PPC and returns buffer is the one to start with. Some sellers list bulky or seasonal items as FBM to avoid long storage periods, while keeping their fast movers in FBA for the conversion lift of Prime.

Storage fees: the cost that is easy to forget

The FBA fulfillment fee covers picking, packing and shipping a unit, but it does not cover the warehouse space your inventory occupies while it waits to sell. Amazon charges a monthly inventory storage fee based on the daily average volume (cubic feet) your stock occupies, with rates that depend on the size tier and the time of year: the off-peak period runs January to September, and October to December costs more. Inventory stored 181 days or longer also pays an aged inventory surcharge (formerly the long-term storage fee), some sellers with slow-turning stock pay a storage utilization surcharge, and a low-inventory-level fee applies when stock falls below 28 days of supply. None of these are deducted at checkout, so they never appear in a quick "fee preview." Estimate a per-unit storage cost (your monthly storage bill divided by units sold that month) and add it to "other costs." A product that turns over quickly carries almost no storage burden; a product that lingers can lose its entire margin to storage alone.

Why PPC quietly decides whether a product works

Advertising is the cost most often left out of a back-of-the-envelope FBA estimate, and for many products it is one of the largest variable expenses after product cost. New listings rarely rank organically on day one, so sponsored-product ads are how many launches get their first sales and reviews. The metric to watch is ACoS (advertising cost of sales): ad spend divided by ad-driven revenue. A 30% ACoS on a $29.99 product is about $9.00 of ad spend per advertised unit, which can erase a margin that looked comfortable on paper. Even mature listings usually run some defensive advertising, so a realistic FBA plan assumes a blended PPC cost across all sales, not just the advertised ones. When you model a product here, put your expected per-unit ad cost into "other costs" before you decide the numbers work. A product that only clears your threshold with zero advertising is not a product that clears your threshold.

Cash flow and reorder math

Profit per unit is only half the picture; cash flow is what keeps an FBA business alive. Between paying a supplier deposit, the balance, ocean or air freight, and the weeks of transit and inbound receiving, your money is tied up long before the first sale, and Amazon pays out only after units sell. This is why ROI matters as much as margin: a product with a 30% margin but a low unit cost recycles your cash faster than a product with a 40% margin and a high unit cost, letting you reorder sooner and grow without external funding. Use the ROI figure from this calculator to rank candidates by how hard your money works, then size your first order conservatively. If you are financing inventory rather than self-funding, model the financing cost per unit too: a Business Loan Calculator shows the monthly cost of an inventory line, which you can spread across expected unit sales and add to "other costs."

Tips for a more accurate estimate

• Use the real size tier. Measure the packed product (dimensions and weight including packaging), compare unit weight with dimensional weight, and look up the exact fulfillment fee rather than guessing.
• Add the surcharge and the season. Since April 17, 2026 the 3.5% fuel and logistics surcharge applies on top of the rate card, and peak fees apply to units shipped from October 15, 2026 to January 14, 2027.
• Land your product cost. Include the supplier price plus inbound freight and any prep, so COGS reflects the true per-unit cost, not just the factory quote.
• Always buffer for PPC and returns. Even a modest per-unit advertising and returns allowance keeps the result honest and prevents nasty surprises after launch.
• Re-run after every fee change. Amazon adjusts its rate cards periodically; a product that was profitable last year may need a price increase to stay viable.

Sources

• Amazon: Selling on Amazon fees and pricing (referral fee rates and minimums by category, selling plans).
• Amazon Seller Central: 2026 US FBA fulfillment fee changes (non-peak and peak rate cards, 3.5% fuel and logistics surcharge, dimensional weight).
• Amazon Seller Central: 2026 US referral and FBA fee changes summary (effective January 15, 2026).
• Amazon Seller Central: Monthly inventory storage fees and aged inventory surcharge.
• Amazon Seller Central: Revenue Calculator (official fee lookup by ASIN or dimensions).