Will Your Amazon Margin Survive Scaling?
Model your unit economics with 2026 Amazon fees: referral, FBA, the fuel surcharge, storage, AWD, ads, product cost and overhead. Then stress-test what a fee hike, rising ACoS or a volume push does to the profit you actually keep.
What the Amazon Margin Calculator Shows You
What the Amazon Margin Calculator Shows You
Most calculators stop at profit per unit. This one shows what happens to that profit when costs move and you scale.
Most calculators stop at profit per unit. This one shows what happens to that profit when costs move and you scale.
Your true net margin.
Your true net margin.
Every cost in one place, from referral and FBA fees to AWD, ads and overhead, with each dollar of sales broken down.
Where cost increases hit.
Where cost increases hit.
See what a 5, 10 or 20 percent increase in fees, ACoS, product cost or overhead takes from your monthly profit.
How to absorb them.
How to absorb them.
Get the price change or extra volume you would need to hold today's margin when costs rise.
Where scale stops paying.
Where scale stops paying.
Model rising ACoS and overhead as you grow, and find the volume where more sales stop adding profit.
Model Your Amazon Margins
Model Your Amazon Margins
Start from the 2026 example numbers or enter your own. Everything updates as you type, and your inputs stay in your browser.
How To Calculate Your Amazon Profit Margin
Enter your costs
Price, units, landed cost, Amazon fees, fulfillment method, AWD, ad spend and overhead, starting from 2026 example rates.
See where the money goes
Net margin, break-even ACoS and price, and a breakdown of what each dollar of sales pays for.
Stress-test and scale
Push fees, ACoS, costs and volume to see which changes your margin can absorb, and which it can't.
Enter your costs
Price, units, landed cost, Amazon fees, fulfillment method, AWD, ad spend and overhead, starting from 2026 example rates.
See where the money goes
Net margin, break-even ACoS and price, and a breakdown of what each dollar of sales pays for.
Stress-test and scale
Push fees, ACoS, costs and volume to see which changes your margin can absorb, and which it can't.
Amazon's 2026 Fee Stack, Explained
US rates as of September 2026, after the January 15 fee update and the April 17 fuel and logistics surcharge. Fulfillment fees depend on size tier, weight and price, so confirm your exact numbers in Amazon's Revenue Calculator or Fee Preview report.
| Fee | How it's charged | 2026 US rate | In the calculator |
|---|---|---|---|
| Referral fee | Percentage of the total sale price, with a $0.30 minimum in most categories | 15% in most categories; 8% for electronics and computers; up to 45% for device accessories. Unchanged for 2026. | Modeled |
| Refund administration fee | Amazon keeps part of the referral fee when you refund an order | 20% of the referral fee, up to $5 per unit | Modeled in returns |
| Professional selling plan | Flat monthly subscription | $39.99 per month | Modeled |
| FBA fulfillment fee | Per unit, by size tier, shipping weight and price band | Up an average of $0.08 per unit on January 15, 2026. Large standard 1 to 1.25 lb: $5.04. Items under $10 get Low-Price FBA rates, $0.86 lower. | Modeled |
| Fuel and logistics surcharge | Percentage of the fulfillment fee, not the sale price | 3.5% since April 17, 2026, about $0.17 per unit on average. No end date announced. | Modeled |
| Holiday peak fulfillment fee | Seasonal per-unit increase on the base fee | October 15, 2026 to January 14, 2027, averaging $0.32 per unit, with the fuel surcharge on top | Add to the FBA fee for Q4 |
| Monthly storage fee | Per cubic foot of average daily FBA inventory | Standard size $0.78 per cu ft January to September, $2.40 October to December. Oversize $0.56 and $1.40. | Modeled |
| Storage utilization surcharge | Added when you hold more than 22 weeks of supply | $0.44 to $1.88 per cu ft extra for standard size | Raise the storage rate |
| Aged inventory surcharge | Units stored more than 181 days | 12 to 15 months: greater of $0.30 per unit or $6.90 per cu ft. 15+ months: $0.35 or $7.90. | Not modeled |
| Low-inventory-level fee | Supply below 28 days, measured per FNSKU | Per unit, by size tier and how low supply falls | Not modeled |
| Inbound placement fee | Per unit when you ship to fewer locations. Zero with Amazon-optimized splits. | Small standard $0.14 to $0.32; large standard up to 1.5 lb $0.20 to $0.50; 3 to 20 lb up to $1.50 | Modeled |
| Inbound defect and unplanned prep | Amazon stopped prepping inventory on January 1, 2026. Non-compliant shipments are charged. | Varies by issue and size | Not modeled |
| Returns processing fee | Returns above your category threshold, or every return for apparel and shoes | From about $1.78 per unit for small standard items | Not modeled |
| AWD storage | Per cubic foot per month, no Q4 surcharge | $0.48 per cu ft in most regions, $0.57 in the West | Modeled |
| AWD processing | Per box, inbound and again outbound | $1.40 per box each way | Modeled |
| AWD transportation | Per cubic foot moved into FBA; includes inbound placement | About $1.40 per cu ft, or $1.26 under Amazon-managed distribution | Modeled |
Sources: Amazon's 2026 US fee update, Retail Dive and CNBC coverage of the fuel surcharge, AMZ Prep's 2026 fee tables, and WarehousingCosts' AWD guide. Rates last checked September 2026.
A planning estimate, not a promise
The calculator models your margin from the numbers you give it and the example rates above. It is enough to see which costs your margin can absorb and where scaling stops paying. A live Trellis account works from your real fees, ad spend and sales instead of estimates. Results are for planning, not financial or tax advice.
Frequently Asked Questions
Yes. Enter your own numbers or start from the 2026 example rates, and it models your net margin, break-even points and scaling scenarios. No signup and no spreadsheet.
Referral fees, the refund administration fee on returns, FBA fulfillment fees with the 3.5% fuel and logistics surcharge, monthly storage, inbound placement, and AWD storage, processing and transport, plus shipping and 3PL costs if you fulfill orders yourself. Aged inventory, low-inventory and returns processing fees are not modeled.
Break-even ACoS is the ACoS at which your net profit reaches zero after every cost, including overhead. If your current ACoS sits close to it, a small rise in CPCs can wipe out your profit, and the calculator flags that.
Growth usually costs more per sale. Pushing volume means bidding on broader, pricier keywords, so ACoS rises, and overhead grows as you add people and tools. The profit-at-scale chart lets you set both and shows where extra volume stops adding profit.
No. The calculator stands alone, and your numbers stay in your browser. A live Trellis account works from your real fees, ad spend and sales instead of estimates.
No. Trellis charges a flat platform fee that does not grow as your ad spend grows, including during a surge. What you pay stays tied to the value you get, not to how much you spend.
Protect Your Margin as You Scale
Model your margins in minutes, then see how Trellis keeps ad spend tied to profit on your own catalog.
Model your margins in minutes, then see how Trellis keeps ad spend tied to profit on your own catalog.
