A sale is not profit after Amazon takes its fees.

Amazon FBA Fee Calculator

Stress-test the SKU after size-tier fulfillment, Q4 storage, placement fees, low-inventory penalties, returns and PPC—not the clean margin in your sourcing sheet.

Model reviewed July 20, 2026. Official Amazon pricing source. Override defaults with current SKU-specific Fee Preview or Revenue Calculator values.

Instant mobile decision

LOW PROFIT CUSHION

A size change, Q4 fee increase, or more returns could erase the month.

PROFIT / ORDER

$2.11

TRUE MARGIN

7.0%

Try an example scenarioAmazon packaged size tierFBA fulfillment fee from Fee Preview

Selling price, Amazon fees, and ads

Selling price paid by the customer

Amazon referral fee

Average coupon or deal discount

Amazon ad cost per order

Product and inbound costs

Product cost, including currency conversion

Shipping and import duty per unit

Amazon inbound placement fee per unit

Prep and labeling cost per unit

Storage and inventory fees

Packaged size per unit

ft³

Monthly storage rate per cubic foot

Average months stored

Aged-inventory fee per cubic foot/month

Low-inventory fee per unit sold

Returns and monthly volume

Customer return rate

Return processing cost per returned unit

Returned units that can be sold again

Monthly FBA orders

Amazon Professional plan per month

Total Amazon fees

$8.79

Product + import cost

$10.07

Storage + aged fees

$0.12

Average return loss

$1.44

Most you can spend on ads

$8.11

Maximum ad cost of sales (ACoS)

27.0%

Minimum return on ad spend (ROAS)

3.70x

Monthly profit

$1,053.20

Bad-case cost test

Shows monthly profit if fulfillment rises $0.50, placement rises $0.30, returns rise 4 percentage points, and ad cost rises 20%.

MONTHLY PROFIT AFTER COST INCREASES

-$580.72

Start with the profit you want to keep

Target Take-Home Profit Pricer

Reverse the exact FBA model above: referral cut, fulfillment, storage, inbound placement, returns, PPC and account allocation stay attached.

Profit you refuse to give up per order ($)

MINIMUM PRICE

$40.43

PRICE MOVE

+$10.44

Current price $29.99 produces $2.11 take-home profit/order. Uses your current editable assumptions; confirm live SKU fees in Seller Central.

Costs a basic FBA calculator may leave out

Amazon fees

Referral, fulfillment, storage, aged inventory, inbound placement, and low-inventory fees.

Product and return costs

Product cost, currency conversion, freight, prep, return processing, and inventory that cannot be sold again.

Maximum ad spend

The calculator shows the most you can spend on ads per order before profit reaches $0.

Amazon FBA fee questions that surface after inventory lands

How are Amazon FBA fees calculated?

A realistic model combines the category referral percentage, size-tier fulfillment fee, inbound freight and placement, prep, monthly storage volume, inventory penalties, return damage, PPC and account overhead. Amazon revenue is not contribution profit.

Why does Q4 storage change FBA profitability?

Amazon publishes higher October–December storage rates. Standard-size storage is shown at $2.40 per cubic foot versus $0.78 from January–September, so slow inventory can suffer a sharp seasonal margin hit.

What causes an FBA size-tier fee spike?

Amazon uses packaged dimensions and shipping weight. A packaging change, measurement correction or dimensional re-tier can move a SKU into a more expensive fulfillment and storage tier. Verify dimensions in Fee Preview rather than trusting a supplier carton sheet.

What is the low-inventory-level fee?

It is a potential per-unit charge for eligible standard-size products with inventory levels that remain low relative to sales. Enter the actual Fee Preview amount because eligibility and rates depend on Amazon account data.

Is this a replacement for Amazon Revenue Calculator?

No. Use this model to stress-test costs Amazon calculators often show separately, then confirm current SKU-specific charges in Revenue Calculator, Fee Preview and Seller Central before purchasing inventory.

Next decision: fee preview is not a profit plan

Full FBA profit model FBA vs FBM Break-even ROAS

Already selling this SKU?

Check your actual Amazon payout file.

Upload a settlement CSV to subtract product cost and outside ad spend, then calculate the selling price needed for your target profit.

Check true profit by SKU

Rate baseline: Amazon US public FBA pricing reviewed July 2026. Storage and fulfillment inputs remain editable because SKU measurements, category, market, dangerous-goods status and fee programs change. Confirm every launch using Amazon Revenue Calculator and Seller Central Fee Preview. Educational planning tool, not financial advice.