Amazon FBA Calculator
Estimate your net profit, margin & ROI after Amazon fees
📦 Product & fees
Per-unit, by size & weight tier
Shipping & other costs (optional)
PPC, prep, returns, storage
Last updated June 2026
Method: Net profit = selling price minus the referral fee (a percentage of price), the FBA fulfillment fee (a flat per-unit charge by size/weight tier), product cost, inbound shipping, and other per-unit costs. Margin is profit / price; ROI is profit / cost.
Included: Referral fee, FBA fulfillment fee, product cost, inbound shipping, optional other costs, net margin, ROI, total fees, and a break-even selling price.
Not included: Live Amazon rate cards, monthly storage and long-term storage fees, PPC spend, prep and return costs, and sales tax. Add these as "other costs." Results are estimates, not an official Amazon quote.
Amazon FBA calculator: everything you need to know
Sell a product for $29.99 and it looks like a tidy win - until Amazon takes its cut. After a 15% referral fee ($4.50), an FBA fulfillment fee ($5.40), a $7.50 product cost, and about $1.00 of inbound shipping, your real take-home is roughly $11.59 per unit - a net margin near 39% and an ROI around 136% on the money you put into each unit. That gap between the sticker price and what you actually keep is exactly what this Amazon FBA calculator exists to show: the profit that lands in your account after every fee and cost.
How FBA profit is calculated
The math is a straightforward subtraction once you know each piece:
Net profit = Price − Referral fee − Fulfillment fee − Product cost − Other costs The referral fee is a percentage of the selling price (usually about 15%). The fulfillment fee is a flat per-unit charge based on the product's size and weight tier. 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:
Margin = Net profit ÷ Price • ROI = Net profit ÷ Cost 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, ship, and handle customer service and returns for that unit. Crucially, the referral fee scales with price while the fulfillment fee is fixed by size and weight, so a cheap, bulky item can be eaten alive by fulfillment costs while an expensive, small item gives most of its margin to the referral fee.
How to use this FBA calculator
You only need a few numbers to get a realistic profit estimate. Work through the fields in order:
- Selling price: enter your list price (or planned price). This is the figure Amazon's referral fee is calculated against.
- Product cost (COGS): the all-in per-unit cost from your supplier, ideally landed at the factory or freight-forwarder.
- Referral fee %: use your category's rate. Tap the 8% / 15% / 17% quick buttons or type an exact value.
- FBA fulfillment fee: enter the flat per-unit fee for your product's size and weight tier from Seller Central.
- Inbound shipping & other costs: open the optional section to add per-unit freight to Amazon, plus PPC, prep, storage, and returns.
Hit Calculate profit and read your net profit per unit at the top, then check the margin, ROI, fee breakdown, and break-even price below.
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 a fee change 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 standard-size tier. The referral fee at 15% is $4.50, the fulfillment fee is $5.40, the product costs $7.50 from the supplier, and inbound shipping is $1.00 per unit. Net profit is $29.99 - $4.50 - $5.40 - $7.50 - $1.00 = $11.59. That is a net margin of about 38.6% and an ROI of about 136% 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 about $8.09 - a workable product.
Worked example: a low-price product that loses money
Now take a $12.99 item with a $5.20 fulfillment fee (it is light but bulky), a 15% referral fee of $1.95, a $4.00 product cost, and $0.80 shipping. Net profit is $12.99 - $1.95 - $5.20 - $4.00 - $0.80 = $1.04 - an 8% margin before a single dollar of advertising. Add $2.00 of PPC and the unit goes negative. This is the classic trap of cheap, bulky products: the fixed fulfillment fee is too large a share of a low price.
Worked example: a high-ticket product
A $89.99 product with a $8.40 fulfillment fee, a 15% referral fee of $13.50, a $28.00 product cost, and $3.00 shipping nets $89.99 - $13.50 - $8.40 - $28.00 - $3.00 = $37.09, a 41% margin and a 120% 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.
Typical referral fees by category
Referral percentages vary by category. The table below shows commonly cited ranges to use as planning defaults - always confirm your exact rate and any per-item minimum in Seller Central, because Amazon updates its fee schedule periodically.
| Category (examples) | Typical referral fee |
|---|---|
| Most categories (default) | ~15% |
| Consumer electronics | ~8% |
| Computers | ~8% |
| Clothing & accessories | ~17% |
| Jewelry | ~20% (tiered) |
| Health & personal care | ~8-15% (tiered) |
Ranges are illustrative planning defaults. Many categories use price tiers and per-item minimums (often around $0.30). Use the live figures in your Seller Central account for pricing decisions.
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 flat per-unit charge for Amazon picking, packing, and shipping the order.
- Size tier: Amazon's classification of a product by dimensions and weight, which sets the fulfillment fee.
- 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 and weight; shrinking packaging to a smaller tier can save dollars per unit.
- Selling price: raising price lifts profit but also raises the referral fee and can cut conversion.
- 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 you should use to decide whether to source a product, how aggressively you can price against competitors, and how much room you have for advertising. Sellers commonly set a minimum margin or ROI threshold (for example, 20% margin and 100% ROI) and reject any product that cannot clear it with a realistic PPC buffer. The break-even price tells you the floor below which a sale or coupon turns into a loss - 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:
- Fees are user-entered; it does not pull live Amazon rate cards, which change over time and by category.
- It models one unit; it does not include the monthly Professional selling-plan subscription spread across volume.
- Storage fees (monthly and long-term) and PPC belong in "other costs" - they are not added automatically.
- It does not model returns and refunds in detail; Amazon refunds most of the referral fee, but unsellable returns still cost you.
- 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. Many sellers list bulky or seasonal items as FBM to dodge long-term storage fees, 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 monthly inventory storage fees based on the volume (cubic feet) your stock takes up, and those fees rise sharply in the fourth quarter when warehouse space is tight. On top of that, slow-moving inventory that sits for many months can trigger long-term (aged) storage fees and, increasingly, low-inventory and capacity-overage surcharges. None of these are deducted at checkout, so they never appear in a quick "fee preview." Estimate a per-unit storage cost - take your monthly storage bill, divide 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 it is frequently the largest variable expense after product cost. New listings rarely rank organically on day one, so sponsored-product ads are how most 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, push 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 then pays out on a roughly two-week cycle. 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) and look up the exact fulfillment fee in Seller Central rather than guessing.
- 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.
- Check the per-item referral minimum. Many categories charge a minimum referral fee (commonly around $0.30), which matters on low-priced items where the percentage would be tiny.
- 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
⚠️ Common mistakes & edge cases
Forgetting PPC and storage
Referral and fulfillment fees are only the fees Amazon charges at checkout. Advertising (PPC) and monthly/long-term storage can quietly cost several dollars per unit. Add them to "other costs" or your margin is fiction.
Using the wrong size tier
The fulfillment fee is set by dimensions and weight, not price. Guessing a small-standard fee for an oversize item understates costs by dollars per unit. Look up the exact tier in Seller Central.
Assuming a flat 15% referral fee
Electronics can be ~8%, apparel ~17%, and some categories use price tiers with per-item minimums. Using 15% everywhere can over- or under-state your real profit. Confirm your category rate.
Ignoring returns
Higher-return categories (apparel, electronics) erode profit even though Amazon refunds most of the referral fee. A returned unit may come back unsellable. Build a returns buffer into "other costs."
❓ Frequently asked questions
How does an Amazon FBA calculator work?
It subtracts every per-unit cost from your selling price to show what you actually keep. The main deductions are Amazon's referral fee (a percentage of the price, usually around 15%), the FBA fulfillment fee (a flat per-unit charge based on the product's size and weight tier), your product cost (COGS), and any inbound shipping or other costs. Net profit = selling price - referral fee - fulfillment fee - product cost - other costs.
What is the Amazon referral fee?
The referral fee is the commission Amazon charges on each sale, calculated as a percentage of the total selling price (item price plus shipping). For most categories it is 15%, but it ranges from about 8% on some products up to 17% or more on others, and many categories carry a per-item minimum of around $0.30. Always confirm your category's exact rate in Seller Central.
What is the FBA fulfillment fee?
The FBA fulfillment fee is a flat per-unit charge that covers Amazon picking, packing, and shipping the order to the customer, plus customer service and returns handling. It is based on the product's size tier and shipping weight, not its price, so a small light item costs much less to fulfill than a large heavy one. Enter the fee for your specific size/weight tier for an accurate result.
What is a good profit margin for Amazon FBA?
Many experienced sellers target a net margin of at least 15-20% after all Amazon fees, product cost, and shipping. Some private-label sellers aim higher to leave room for advertising (PPC), returns, and price competition. A margin that looks healthy before PPC and storage can shrink quickly once those variable costs are included, so build them into the 'other costs' field.
What is the difference between margin and ROI?
Margin is net profit divided by the selling price - it tells you what share of each sale you keep. ROI (return on investment) is net profit divided by what you spent to get the unit ready to sell (product cost plus shipping and other costs) - it tells you how hard your money is working. A product can have a modest margin but a strong ROI if your unit cost is low, which matters for cash flow and reordering.
Does this calculator include Amazon PPC and storage fees?
Not automatically. PPC advertising spend, monthly and long-term storage fees, prep fees, and return costs are real but they vary a lot by product and season. Add an estimated per-unit amount for them in the 'other costs' field so your net profit reflects the true cost of selling, not just the fees Amazon charges at checkout.
How do I find my exact FBA fees?
Use Amazon's official FBA revenue calculator inside Seller Central or the public 'Revenue Calculator' tool, where you can look up an ASIN or enter dimensions to get the current referral percentage and fulfillment fee for your exact product. This calculator is a fast planning estimate; the figures in Seller Central are authoritative because Amazon updates rate cards periodically.
Why is my FBA profit lower than expected?
The most common reasons are an underestimated fulfillment fee (the wrong size tier), forgetting PPC and storage, ignoring returns and refunds (Amazon refunds the referral fee minus a small amount but you may not get the unit back in sellable condition), and using a referral rate that is too low for your category. Re-check each input against Seller Central and add a realistic 'other costs' buffer.
Is the referral fee charged on the shipping I collect?
Yes. Amazon calculates the referral fee on the total sales price, which includes any shipping charges you pass to the buyer (and gift-wrap charges where applicable). For most FBA sellers shipping is included in the item price, so entering your full selling price already captures this. If you sell merchant-fulfilled with separate shipping, include that amount in the price field.
What is the break-even price this calculator shows?
The break-even price is the lowest selling price at which your net profit is exactly zero, given your costs and the referral percentage. Because the referral fee is a percentage of the price, the formula accounts for the fee rising as the price rises: break-even price = (fulfillment fee + product cost + shipping + other costs) / (1 - referral %). Selling below it loses money on every unit.
Can I use this calculator before sourcing a product?
Yes - that is one of its best uses. Before you order inventory, plug in a target selling price, the supplier quote for product cost, an estimated fulfillment fee from a similar product's size tier, and a referral percentage for the category. If the margin and ROI do not clear your threshold with a realistic PPC buffer, the product likely is not worth sourcing.
Are these results an official Amazon quote?
No. This is an independent estimate to help you plan. Amazon's fee schedules change over time and depend on your exact category, product dimensions, weight, and any program enrollments. Always verify the current referral and fulfillment fees in your Amazon Seller Central account before committing to pricing or sourcing decisions.
Should I use FBA or FBM (fulfill myself)?
It depends on the per-unit math. With FBA you pay a fulfillment fee but get the Prime badge and hands-off logistics; with FBM (Fulfillment by Merchant) you skip the fulfillment fee but ship orders yourself and pay your own postage, packaging, and labor. Small, light, fast-moving products usually win with FBA, while large, heavy, or slow-moving items can net more with FBM. To compare, run the product through this calculator once with the real FBA fulfillment fee, then again with the fulfillment fee set to zero and your actual shipping and packing costs entered under 'other costs.'
Do FBA storage fees affect my profit?
Yes, but they are not charged at checkout, so they never show in a quick fee preview. Amazon bills monthly inventory storage fees based on the cubic feet your stock occupies (higher in Q4), plus long-term or aged-inventory and capacity surcharges for stock that lingers. Estimate a per-unit storage cost by dividing your monthly storage bill by units sold that month, and add it to 'other costs.' Fast-turning products carry almost no storage burden; slow movers can lose their whole margin to storage.
💡 Good to know
The "fee preview" you see is not your full cost
Amazon's checkout fees are only the referral and fulfillment fees. Your true cost per unit also includes product cost, freight, PPC, storage, and returns. Always compare net profit after all of those, not just after Amazon's fees.
Size tier is your biggest fulfillment lever
Because the fulfillment fee is set by dimensions and weight, slightly smaller packaging can drop you into a cheaper tier and save dollars per unit. Before sourcing, design the package to fit the lowest practical tier.
Check fees in Seller Central before pricing
Amazon updates its referral and fulfillment fee schedules periodically and they vary by category and product. Use the official FBA revenue calculator in Seller Central for the authoritative numbers before you commit to a price or a purchase order.
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