Gross profit before ads: $11.67 Gross margin: 33.4% Break-even ROAS: 3.00x Max CAC (max ad spend per order): $11.67 Actual ROAS: —
Enter ad spend to check ROAS
📊 Profit comparison — net profit per order
🛍️ Shopify$19.18
🎨 Etsy$16.72
📦 Amazon FBA$11.67
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, Shopify above: Max CAC $19.18 — spend $10 on ads for that order and you keep $9.18; spend $19.18 and you break even at $0; spend $20 and you lose $0.82 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.
🛍️ Your numbers work best on Shopify Start selling on Shopify → Affiliate link: Shopify pays up to $150 per qualified referral in the US, Canada, Australia, UK and much of Europe, once the merchant reaches a full-price paid plan.
AFFILIATE PLACEHOLDER — not a live link yet
Your ROAS is below break-even for the winning platform. When Alice has a Semrush affiliate account, this will link there as the fix-ads next step.
Earlier research: $200 per sale + $10 per trial.
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
$1,918.00
$25.92
$15.24
🎨 Etsy
$1,672.00
$29.60
$16.52
📦 Amazon FBA
$1,167.00
$40.16
$21.26
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.
Future display ad slot — empty until launch.
📊 How it works
Follow the money, step by step:
1💰 Revenue — Price + shipping charged
↓ minus
2➖ Product cost
↓ minus
3➖ Shipping cost
↓ minus
4➖ Platform fee
↓ minus
5➖ Ad spend
↓ equals
6✅ Net profit
Then check your ads:
1Net profit + ad spend = Gross profit
↓ divide by revenue
2Gross profit ÷ Revenue = Margin %
↓ invert
31 ÷ Margin % = Break-even ROAS
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.
ROAS rule, visual: ❌ Below break-even (e.g. 1.82x for this Shopify example) = losing money on ads | ✅ Above break-even = profitable ads.
Show full fee table and formulas (for detail lovers)
Net profit = price + shipping charged − product cost − shipping cost − platform fee − ad spend. Gross profit before ads = net profit + ad spend. Margin % = gross profit ÷ revenue. Break-even ROAS = 1 ÷ margin %. Actual ROAS = revenue ÷ ad spend, when ad spend > 0.
Shopify (via Shopify Payments, Basic): 2.9% × (price + shipping charged) + $0.30. Plans $39 / $105 Grow / $399 per month are not in per-order profit — v1 profit is “before monthly plan cost”. Third-party gateway adds 2% on Basic.
Etsy: $0.20 + 6.5% + 3% + $0.25 = 9.5% × (price + shipping charged) + $0.45, before Offsite Ads (15% under $10k/365 days, 12% at $10k+, capped at $100, excluded from v1).
Amazon FBA: referral (default 15%, 15% in most categories; 8% electronics, 17% clothing above $20, 20% jewelry, 45% device accessories) × (price + shipping charged, excluding tax) + manual FBA fee. Default $3.57 = $3.45 small-standard + $0.12 (3.5% surcharge since 17 Apr 2026). Peak 15 Oct 2026–14 Jan 2027 ~$0.21 (small-standard). Storage, inbound and aged-inventory surcharges excluded.
Locked test case: $34.99 / $14.50, no shipping/ads → Shopify $19.18, Etsy $16.72, Amazon $11.67 (peak $11.46). Fees checked 29 Oct 2026.
❓ Frequently asked questions
Tap a question to see the answer.
🧮 What is a seller profit calculator?
A seller profit calculator shows what you actually keep after product cost, shipping, platform fees and ad spend — not just your selling price.
📈 What is break-even ROAS?
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.
🎯 What is Max CAC?
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.
💰 What is Actual ROAS?
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.
🎨 How are Etsy fees calculated?
In this calculator: $0.20 listing + 6.5% transaction + 3% + $0.25 payment processing, before Offsite Ads.
📦 How are Amazon FBA fees calculated?
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.
🔑 Do I need an account to use this calculator?
No. It is free, with no login and no signup, and all calculations run in your browser.
This will clear your current inputs and return to the defaults: price $34.99, cost $14.50, shipping $0, ad spend $0, orders per month 100, referral 15%, FBA fee $3.57, both checkboxes off.