Hidden Fee / Offsite Ads Stress Tester.

What happens to profit when the costs nobody puts in the headline appear — Etsy Offsite Ads and refunds — shown base vs stressed, side by side.

FEE-ONLY · FEES CHECKED FROM OFFICIAL PAGES · LAST VERIFIED 4 NOV 2026

Your numbers

Platform

Refund rate (%)

Share of orders refunded. Your real rate, not a guess — check your dashboard.

Selling price (per item)

Shipping charged to buyer

Product cost (per item)

Your shipping cost (per order)

Orders per month

Include Etsy Offsite Ads (15%) in the stressed case

Etsy only. Standard 15% rate on ad-attributed sales. The 12% rate for shops over $10,000 in the prior 365 days, with its $100 cap, is not modelled.

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YOUR ANSWER — FEE-ONLY

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How it is calculated — and the one assumption, stated plainly

Base case: verified per-order fees only, no Offsite Ads, no refunds. Stressed case: the same fees plus Offsite Ads 15% of the order base when the toggle is on (Etsy only), plus your refund rate. A refunded order is modelled as: revenue $0, product + shipping costs still paid, platform fees assumed refunded. That assumption is stated here because it is not verified for every platform — some platforms keep part of the fee on a refund, which would make the stressed result worse. The tool therefore also shows a lower bound: stressed profit if fees were kept on every refunded order. The truth for your shop is between those two lines; check your seller dashboard for your platform's refund fee policy.

No other “hidden fees” are invented here. If a rate is not in the Fee Index and not entered by you, it is not in this calculation — that is the point of the test.

Worked example (defaults): Canada, Etsy, price $40, shipping charged $8, cost $15, shipping cost $6, 50 orders, 10% refunds, Offsite Ads on. Base fees $5.25 per order, base monthly net $1,087.50. Stressed fees $12.45 per order ($5.25 + 15% × $48 = $7.20). Stressed net per completed order $14.55; per refunded order −$21.00 (costs paid, fees assumed refunded). Expected stressed monthly = 50 × (0.9 × $14.55 + 0.1 × −$21.00) = $549.75. If fees were kept on refunds, stressed monthly falls by 50 × 0.1 × $12.45 = $62.25, to $487.50.

What this tool does NOT include — read before deciding

Discovery: marketplaces bring their own search traffic; your own store does not. A fee saving does not pay for the traffic you would need to replace.
Customer acquisition cost (CAC): not included unless a tool says so. Paid traffic can erase a fee saving — run the numbers with your real CAC.
Refunds and returns: not modelled unless a tool says so. Some platforms keep part of the fee on a refund; return shipping and restocking are extra.
Apps and plugins: your own store's apps, themes, and tools are not in the Shopify Basic subscription shown here.
Taxes: sales tax / VAT is excluded from the fee base. eBay Germany figures exclude 19% USt.
Fulfilment and storage: no FBA, 3PL, warehouse, or storage fees are included for any platform.
Currency conversion, international fees, and category variations: not modelled. Most-common category rates are used; your category may differ — check your seller dashboard.
Refund policy differences: each platform's actual refund fee retention is not modelled as a single rate — see the stated assumption and the lower bound above.

Why Amazon is not compared — explicit exclusion

Amazon is not in this tool, deliberately — not an oversight and not a “coming soon” badge. Amazon referral fees vary by category (roughly 8% to 45%) and FBA fees depend on size and weight, which this tool does not collect, and Amazon’s Seller Central schedule is login-gated and could not be verified from an official page. No Amazon numbers are shown rather than guessed ones. See the Fee Index for exactly what is missing.