Is Your Product Worth Selling? Amazon FBA Profit Calculator

The 2026 Fee Stack, In the Order Amazon Deducts It

Amazon does not take one commission. It deducts four separate fees in a fixed sequence, and each one is calculated on a different base. The calculator above does the arithmetic; the sequence is what tells you which line to question when your own numbers disagree with the payout report.

1. Referral fee — first, and on the whole order total. Most categories pay 15%, with a $0.30 per-unit minimum. The base is the total sales price the buyer pays, which includes any shipping you charged them. Sellers who model 15% of the item price alone understate this line on every order where shipping is billed.
2. Fulfillment fee — by size tier and by price band. A 1 lb large-standard unit costs $3.78 to fulfil at a price under $10, $4.60 between $10 and $50, and $4.86 above $50. Since April 17, 2026 a 3.5% fuel and logistics surcharge is applied on top of this line, about $0.17 per unit on average. The calculator models the published card, so add the surcharge yourself to see what actually leaves the account.
3. Monthly storage — by volume, and the rate changes on October 15. $0.78 per cubic foot from January through September, $2.40 from October through December. It is billed on the daily average volume, not on whatever is sitting in the warehouse on the last day of the month.
4. Aged inventory surcharge — only if the unit sits. Nothing for the first 180 days. From day 181 the rate starts at $0.50 per cubic foot and climbs in steps, reaching $7.90 per cubic foot or $0.35 per unit, whichever is greater, past 456 days.

Read the sequence, not the total. A product can look healthy after step 1 and lose money by step 4, which is what happens to slow-moving stock bought for the fourth quarter. A base error at step 1 shows up as a uniform percentage gap against your own model; a size-tier or storage error shows up as a flat dollar difference that does not move when the price does. That difference is the fastest way to tell the two apart.

Referral Fee: 15% Is a Default, Not a Rate

Two things in that table matter more than the headline percentages, because both change what you should type into the referral field. First, in Beauty, Baby and Grocery the 8% rate stops at a price threshold — so a $9.99 item and a $10.01 item in the same category pay different percentages, and the cheaper one can carry the higher rate. Second, where a fee is split at a break point the effective rate falls as the price rises: a $3,000 watch pays 16% on the first $1,500 and 3% on the rest, which is an effective 9.5%, not 16%. Entering the headline number for an expensive item in one of those categories overstates your fee, sometimes by several hundred dollars a unit.

The Fee Grid Behind the Single Number You Got

The calculator returns one fulfillment fee for the weight you entered. Underneath it is a two-dimensional grid: 13 shipping-weight bands across three price bands for large standard alone. You only ever see one cell, which is why the boundaries are where products get expensive by accident. Rates below are Amazon's published US card for January 15 to October 14, 2026, before the 3.5% fuel surcharge. Shipping weight is the greater of unit weight or dimensional weight, and it includes the packaging.

Storage Nearly Triples on October 15 — and the Timing Is What Costs You

The seasonal jump on standard-size storage is the largest single step change in the FBA fee card, and it is also the one most often modelled wrongly. The peak rate does not depend on when the unit arrived. It depends on whether the unit is in a fulfilment centre during the peak months.

• Oversize is cheaper per cubic foot, not cheaper overall. An oversize unit pays $1.40 instead of $2.40 in peak, but it occupies far more cube, so the line item still comes out larger. Compare the product of volume and rate, never the rate alone.
• A separate utilisation surcharge stacks on top. Sellers holding more than 25 cubic feet on average whose stock covers more than 22 weeks of sales pay an extra $0.44 to $1.88 per cubic foot, on top of the base rate, and only on units aged over 30 days. Stocking deep for Q4 can trigger it in January, when the sales that justified the stock have already happened.
• The cheap lever is arrival timing. Stock that lands in September and clears in December pays three months at the peak rate. The same stock landed in November pays one or two. Arriving earlier does not lower the rate; it lengthens the exposure.

The calculator takes storage as a manual per-unit input rather than estimating it, because the honest number depends on your average daily volume, your packaged dimensions and the month. Use the two cards above to pick the rate, multiply by your unit volume in cubic feet, and enter that figure.

Aged Inventory: It Starts at Day 181, But the Cliff Is at Day 271

The aged inventory surcharge is assessed on an inventory snapshot taken on the fifteenth of each month, on top of the monthly storage fee. It has eight steps, but only two of them change what a rational seller does. The first three steps cost cents. The fourth is a 3.6x jump that turns a slow mover into a liability within a single month.

• Clothing, shoes, bags, jewelry and watches skip the first three steps entirely. For those categories the $0.50, $1.00 and $1.50 rates do not apply, so the first surcharge lands at day 271 — and it lands at $5.45, with no cheap steps in between. A clothing seller has a longer grace period but a harder landing than a seller in any other category.
• Two calculations, and you pay the larger. Amazon computes the surcharge by cubic footage and by unit count, then bills whichever is higher. For dense, high-volume products the cubic-foot method wins; for small light items the per-unit charge often wins. The worked examples on Amazon's own page show a 20-unit toy at 457 days billed $16.12 on cube against $7.00 per unit.
• The deadline is the 14th, not the snapshot date. Removal orders submitted before 23:59 Pacific on the fourteenth of the month remove the units from that month's assessment, even if they have not physically left the building yet.

The Same Product in Three Marketplaces

Switch the marketplace selector above and the fulfillment fee changes shape, not just size. In the United States the fee is set by two variables at once — the shipping weight and the sale price. In Germany and Japan the sale price does not enter the calculation at all. That single structural difference decides whether raising your price in a new market costs you money or not.

The example is one 0.5 kg standard-size unit at a mid-band price, converted at the same rates the calculator uses. It is not a claim that one marketplace is cheaper to sell in — the referral fee, inbound freight and tax position all move too. It is a claim about behaviour under repricing. In the United States, moving an item from $9.99 to $10.49 shifts its fulfillment cell from the low band to the mid band and raises the fee by roughly $0.82 on a 1 lb unit, so a price test has a cost baked in before any customer responds. In Germany and Japan the same move changes nothing on the fulfillment line, which makes price testing materially cheaper there.

• Boundary pricing is a US-specific problem. Near a band edge — $10, $50, or a weight step — a cent of price or an ounce of packaging can move a unit into a more expensive cell permanently. Measure the packed dimensions, not the product.
• In Europe, the parcel size tier is the lever. The same product in a smaller box can drop a parcel tier and cut the fulfillment fee, with no repricing at all. Package redesign is the cheapest fee reduction available in DE, and it does not exist as a lever in the US once the weight band is fixed.
• Currency converts the comparison, not the fee. The calculator converts EUR and JPY at fixed monthly averages so the profit column stays in dollars. Your actual landed fee will move with the exchange rate, so re-check sold-marketplace mix before committing a quarter of inventory.

Amazon FBA Profit Margin Benchmarks by Product Category

Profit margins vary significantly by product category on Amazon FBA. Understanding these benchmarks helps you set realistic pricing and product selection strategies.

Net margins of 20-30% are considered healthy for FBA. The difference between gross and net margin is typically 8-15 percentage points after accounting for PPC advertising, returns, and storage fees. Low-competition categories like pet supplies and office products often offer better margins than electronics. Use this calculator to find your exact net margin and ROI for each product.

Amazon FBA Seasonal Trends: Best Times to Sell by Category

Amazon sales are highly seasonal. Knowing when demand peaks for your product category helps you plan inventory, advertising, and pricing strategies. Below is a seasonal calendar showing when different categories see peak demand.

Q4 holiday season is the most profitable time for Amazon sellers, with many categories seeing 2-3x normal demand. However, standard-size storage rates more than triple on October 15 and stay at that level through December, so inventory planning is critical. The key to seasonal success is preparation — research shows that products listed and optimized 60-90 days before peak season perform 2-3x better than those listed at the last minute. Use this Amazon FBA calculator to model your seasonal profit margins.

The Cost of Exit: Returns and Removals

Two costs sit outside every fee card, because neither is charged per sale. One arrives when a sale reverses; the other, when you give up on the inventory behind it. The table below is the clean-sale model the calculator produces — the two sections after it are what that model leaves out.

A return costs more than the refund

Budget a returns allowance of roughly 3-5% of revenue for most categories, and materially more for apparel and electronics, where return rates run far higher. The allowance is not the same thing as the refund. A returned unit is inspected, repackaged and often resold at a discount, and it has already consumed its inbound freight and one fulfilment fee, neither of which comes back; some categories add a returns processing fee on top. A 4% return rate on a thin-margin product can therefore erase a double-digit share of profit, which is why the allowance belongs in the per-unit model rather than in a year-end adjustment. Raise the returns line in the calculator and watch what it does to the net figure.

Removal and disposal: the exit is not free

When a product fails, the inventory does not disappear with it. Removal orders and disposal both carry per-unit fees, so exiting a SKU has a price on top of the loss already booked — a failed product never costs zero to close. The useful frame is recurring against one-off: storage and aged-inventory charges repeat every month, a removal fee is paid once. Once a slow mover's monthly carry cost exceeds the one-off cost of pulling it, every further month is a decision rather than a cost being absorbed. The reason this stays invisible is that the two costs never appear on the same line — carry costs sit under storage, removal sits under its own heading, and nothing in the payout report adds them together. Build the comparison when a SKU first stalls, not when the surcharge has already become its largest cost.

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