See what you keep on Amazon FBA after referral, fulfillment, shipping and ads.
Free · No login · Calculations run in your browser · Fees checked 29 Oct 2026 · $42.00 → Amazon $16.13
Two fees make up the Amazon fee: a referral fee and a fulfillment fee you enter yourself. Since 28 Oct 2026, the referral fee is calculated on price + shipping charged to the buyer (excluding tax), not price alone — the same base Etsy already uses. Default referral is 15% (15% in most categories; 8% electronics, 17% clothing above $20, 20% jewelry, 45% device accessories). Default FBA fee is $3.57 = $3.45 small-standard fulfillment + $0.12 (3.5% fuel/logistics surcharge since 17 Apr 2026). Holiday peak, 15 Oct 2026 – 14 Jan 2027, adds ~$0.21 per unit (small-standard).
Benchmark, guidance only: many successful Amazon FBA sellers target roughly 25–35% net margin — use it as a sanity check, not a guarantee.
⭐ Amazon FBA is first below because this is the Amazon FBA page — 🏆 still marks the highest profit overall, judged across all three platforms.
💪 Healthy level — based on 38.4% gross margin on Amazon FBA.
Level up tip (approx, before fee change): raise your price by about $0.67 on Amazon FBA to reach a 40% margin.
Focus platform for this page — highest overall is Shopify at $24.48 per order.
⭐ Focus on this page
Platform fee: $9.87
Referral 15% of price + shipping charged + FBA fee $3.57 (small-standard default)
Effective fee rate: 23.5% of revenue
Gross profit before ads: $16.13
Gross margin: 38.4%
Break-even ROAS: 2.60x
Max CAC (max ad spend per order): $16.13
Actual ROAS: —
Enter ad spend to check ROAS
🏆 Highest profit
Platform fee: $1.52
2.9% via Shopify Payments (Basic) + $0.30 — before monthly plan cost
Effective fee rate: 3.6% of revenue
Gross profit before ads: $24.48
Gross margin: 58.3%
Break-even ROAS: 1.72x
Max CAC (max ad spend per order): $24.48
Actual ROAS: —
Enter ad spend to check ROAS
Platform fee: $4.44
$0.20 + 6.5% + 3% + $0.25 — before Offsite Ads
Effective fee rate: 10.6% of revenue
Gross profit before ads: $21.56
Gross margin: 51.3%
Break-even ROAS: 1.95x
Max CAC (max ad spend per order): $21.56
Actual ROAS: —
Enter ad spend to check ROAS
Bars are scaled to the highest profit. 🏆 still marks the highest profit overall.
Max CAC, in plain words: the most you can spend on ads for one order before you start losing money. Example, Amazon FBA above: Max CAC $16.13 — spend $10 on ads for that order and you keep $6.13; spend $16.13 and you break even at $0; spend $17 and you lose $0.87 on that order, even though you made a sale.
Actual ROAS, in plain words: actual revenue divided by actual ad spend, per order. Actual ROAS 10.00x means for every $1 of ad spend, you get $10 of sales revenue — for example $3.50 ad spend and $35.00 revenue. It is revenue, not profit: compare it with Break-even ROAS on the same card. Above break-even = ads are profitable; below break-even = ads lose money, even if ROAS looks high. If ad spend is $0, Actual ROAS shows —, not a number.
Pick one to keep going.
At 100 orders per month, net profit per month (after ad spend, before monthly plan costs) is:
| Platform | Monthly net | 40% price | Break-even price |
|---|---|---|---|
| 🛍️ Shopify | $2,448.00 | $28.55 | $16.79 |
| 🎨 Etsy | $2,156.00 | $32.57 | $18.18 |
| 📦 Amazon FBA | $1,613.00 | $43.49 | $23.02 |
Target price is approximate: raising price also raises percentage fees, so the exact 40% price is slightly higher. Monthly profit = net profit per order × orders per month. 40% price = the selling price that would leave 40% gross margin before ads at your current costs and fees. If it is below your current price, you already beat 40%; if above, that is how high you would need to go to reach 40%. 40% is a healthy-margin example, not a rule. Break-even price = the selling price where profit is $0.
Follow the money, step by step:
Then check your ads:
Max CAC = Gross profit. If ad spend per order is higher than Max CAC, you lose money on that order — even if ROAS looks high.
Example — one $42.00 Amazon FBA sale, visual split:
🟧 Cost $16.00 (38.1%) 🟦 Fee $9.87 (23.5%) 🟩 Profit $16.13 (38.4%) — Total $42.00
ROAS rule, visual: ❌ Below break-even (e.g. 2.60x for this Amazon example) = losing money on ads | ✅ Above break-even = profitable ads.
Tap a question to see the answer.
A seller profit calculator shows what you actually keep after product cost, shipping, platform fees and ad spend — not just your selling price.
Break-even ROAS is 1 ÷ your gross margin %. At 40% margin, break-even ROAS is 2.5x. Below that, you are losing money on ads even if ROAS looks positive.
Max CAC is the most you can spend to get one order — on ads — before you lose money. It equals your gross profit before ads. Example: if gross profit is $19.18, spending $10 per order leaves $9.18, spending $19.18 breaks even, and spending $20 loses $0.82 on that order.
Actual ROAS is your actual revenue divided by your actual ad spend, per order. 10.00x means $10 of sales revenue for every $1 of ad spend — for example $3.50 ad spend and $35.00 revenue. It is revenue, not profit, so always compare it with Break-even ROAS: above break-even is profitable, below break-even loses money even if the number looks high.
In this calculator: $0.20 listing + 6.5% transaction + 3% + $0.25 payment processing, before Offsite Ads.
Referral fee (15% in most categories; 8% electronics, 17% clothing above $20, 20% jewelry, 45% device accessories, on price + shipping charged, excluding tax) plus a manual FBA fee, default $3.57 for a small-standard item including the 3.5% surcharge. FBA fees vary by size, weight and price band, which is why v1 asks you to enter your fee.
No. It is free, with no login and no signup, and all calculations run in your browser.
Fulfillment varies by size, weight and price band, so a single default would mislead most sellers. $3.57 is only the small-standard default — replace it with your own rate if you know it.
Storage, inbound placement and aged-inventory surcharges are excluded from v1, and the calculator says so.
It adds ~$0.21 per unit (small-standard) for 15 Oct 2026 – 14 Jan 2027. In the worked example it takes profit from $16.13 to $15.92.
Try these numbers in the calculator above: selling price $42.00, product cost $16.00, no shipping, no ad spend, FBA fee $3.57, referral 15%.
Amazon fee = 15% × $42.00 + $3.57 = $6.30 + $3.57 = $9.87. Net profit = $16.13. Gross margin = 38.4%, break-even ROAS = 2.60x, Max CAC = $16.13. With the holiday peak box checked, the FBA fee becomes $3.78 and profit falls to $15.92.
Shipping example: $25 item + $5 shipping charged at 15% gives a referral fee of 15% × $30.00 = $4.50, not $3.75.
Why do I have to enter my FBA fee? Fulfillment varies by size, weight and price band, so a single default would mislead most sellers. $3.57 is only the small-standard default — replace it with your own rate if you know it.
What is excluded? Storage, inbound placement and aged-inventory surcharges are excluded from v1, and the calculator says so.
What does the peak uplift change? It adds ~$0.21 per unit (small-standard) for 15 Oct 2026 – 14 Jan 2027. In the example above it takes profit from $16.13 to $15.92.
Net profit = price + shipping charged − product cost − shipping cost − platform fee − ad spend. Gross margin % = gross profit before ads ÷ revenue. Break-even ROAS = 1 ÷ gross margin %. Max CAC = gross profit before ads. Amazon referral is on price + shipping charged (excluding tax), updated 28 Oct 2026. Full fee table, diagram and launch checklist are on the home page: Methodology. Fees are web-search findings from 27–28 Oct 2026, not official-page checks — re-check against official Shopify, Etsy and Amazon pages and date-stamp before launch.
🏠 Seller Profit Calculator (home) · 🎨 Etsy profit calculator 🛍️ Shopify profit calculator 📦 Amazon FBA profit calculator（本页） 📈 Break-even ROAS calculator · 📖 Methodology
This will clear your current inputs and return to the defaults: price $42.00, cost $16.00, shipping charged $0, shipping cost $0, ad spend $0, orders per month 100, referral 15%, FBA fee $3.57.