Free FBA Profit Calculator
See your real Amazon margin including PPC, returns, and tariffs — not just the headline number. Get the math before you commit to inventory.
Fee schedule last verified January 15, 2025
Your numbers
Headline vs real margin
Price minus COGS only — what most calculators show
After fees, PPC, returns, and tariffs
Most FBA calculators show 80.0% — your real margin is 60.2% lower after all Amazon costs.
Fee schedule last verified January 2025. Verify against Amazon's published rates.
How to calculate Amazon FBA profit
Your real FBA profit margin is your selling price minus every cost Amazon touches before money reaches your account: the Amazon referral fee (8–20% depending on category), the FBA fulfillment fee(picking, packing, shipping — set by your product's size and weight), monthly storage fees, your inbound shipping to Amazon warehouses, your advertising spend, a reserve for customer returns, and your cost of goods (including any import tariffs).
The formula: Net = Revenue − Referral − FBA fee − Storage − Shipping − PPC − Returns − COGS
Your real margin is Net ÷ Revenue × 100. Your break-even price is the minimum selling price where Net = 0 — useful for knowing how low you can go during deals or price wars.
Why most FBA calculators are wrong
Most FBA profit calculators — including Amazon's own — show you two numbers: the referral fee and the FBA fulfillment fee. That's it. The result looks like a healthy margin. The gap between that number and your real margin is where most FBA businesses quietly lose money.
What they miss:
- PPC (advertising) — the single biggest omission. Most sellers spend 10–20% of revenue on Amazon ads. Skip this and your margin looks 10–20 points higher than reality.
- Returns — clothing returns 15–30% of units. Each return costs you the return processing fee plus the probability the item can't be resold.
- Import tariffs — for sellers sourcing from China, tariffs add 30–145% to COGS. This alone can flip a profitable product to a losing one.
- Inbound shipping — freight to Amazon warehouses costs $0.50–$3.00+ per unit depending on your supplier location and shipment size.
The headline margin (price minus COGS) is the number that gets you excited about a product. The real margin is the number that determines whether you stay in business.
How Amazon FBA fees work in 2026
Amazon charges two primary fee categories for FBA sellers: referral fees (a percentage of the sale price, varying by category) and FBA fulfillment fees (a flat fee per unit based on size and weight tier).
Referral feesrange from 8% (electronics, cameras, cell phones) to 20% (jewelry) with most categories at 15%. Some categories have price-tiered rates — Baby Products and Health & Personal Care are 8% under $10, then 15% above.
FBA fulfillment fees are updated annually in January. Small standard products (under 1 lb) range from $3.22 to $3.77. Large standard products start at $3.86 for the lightest tiers and scale to $8.11+ for heavier items. Oversize products face substantially higher fees starting at $11.37.
Storage fees are $0.78/cubic foot from January to September and $2.40/cubic foot October through December (peak season surcharge). Long-term storage fees apply to inventory held over 365 days.
2024 fee changes: Amazon removed the fuel and inflation surcharge that had been in place since 2022. Inbound placement fees were introduced. Low-inventory fees apply when you have less than 28 days of cover in FBA.
Frequently asked questions
How accurate is this FBA calculator?
The fee schedule is based on Amazon's published 2025 rates and is verified regularly. The calculation is accurate when you input your real costs. The key variable most sellers underestimate is PPC — the default 15% is a reasonable average, but high-competition categories can be 25–40%. Always input your actual ACoS for the most accurate result.
Do FBA fees vary by product?
Yes. FBA fulfillment fees depend on your product's size tier (dimensions and weight). Referral fees depend on your category. Storage fees depend on how long inventory sits in Amazon's warehouse. This calculator lets you select your exact size tier and category to get accurate numbers.
What's a good FBA profit margin?
A real margin (after all costs including PPC) of 15–25% is healthy for most FBA businesses. Under 10% leaves you vulnerable to fee increases, ad cost inflation, and inventory variability. Over 30% is excellent. The key is knowing your real number — not the headline margin that excludes PPC and returns.
How do tariffs affect my FBA profits?
Tariffs are applied to your COGS (product cost). If you source from China and face a 30% tariff, a $5 product now costs $6.50 to land — that $1.50 difference comes straight out of your margin. For thin-margin products, tariffs at 30%+ can turn a profitable product unprofitable overnight. Use the tariff slider to model your exact exposure.
Should I include PPC in my margin calculation?
Absolutely. PPC (advertising) is one of the largest costs in your P&L and the most commonly omitted from "back of the napkin" margin math. Most Amazon sellers spend 10–20% of revenue on ads. If you ignore it, your real margin looks dramatically better than it actually is — which leads to bad sourcing and pricing decisions.
What's the difference between this and Amazon's FBA Revenue Calculator?
Amazon's calculator shows you fulfillment fees and referral fees only. It doesn't include PPC costs, return reserves, inbound shipping, or tariffs. Those omitted costs often represent 20–30 percentage points of real margin. This calculator shows you the full picture.
Can SellerForge calculate this for all my products automatically?
Yes. SellerForge's Listing Audit module connects to your Amazon account and pulls real data — actual ACoS, real return rates, and fee history — for every ASIN in your catalog. It automatically flags products losing money and shows where your margin is being eroded.
Want SellerForge to run this across your entire catalog?
Connect your Amazon account and our Listing Audit module automatically calculates real margins for every ASIN — using your actual ACoS, real return rates, and category-specific fees.
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