Etsy Fee Calculator Extension for Chrome

The Etsy Fee and Tariff Calculator extension puts the real profit of an Etsy listing on the listing page itself. Open any listing, yours or a competitor’s, and a popover appears under the price: the profit number collapsed, and behind one click the full 2026 fee breakdown, every line with its rate, including the 15% Etsy fee on the DDP tariff charge that most fee tools still skip. It asks Chrome for a single permission, runs its math entirely in the browser, and has been live in the Chrome Web Store since September 5, 2026. This guide covers installing it, running a breakdown, and checking what any fee extension does with your data.

What the extension shows on a listing page

The extension is a content script: it runs on Etsy listing pages and only there. When a page shows a price, it reads that price and the shipping the buyer pays from the page, and anchors a popover directly under the price block. Collapsed, it shows the profit. Expanded, it shows the fee lines behind that number:

Fee line	Rate	Applies to
Listing fee	$0.20	every item sold, a fixed US sum
Transaction fee	6.5%	item price plus the shipping charged, computed on the tariff-free base
Payment processing	3% plus $0.25	the same base, US shops
Offsite Ads fee	15%, or 12%	the full order value, only on orders ads brought; 12% for shops over $10k in 12 months
DDP tariff charge	your rate	the duty inside a US price, the customs value times the rate
Etsy fee on the tariff	15%	the tariff dollars inside the price

Every input is editable in place: the tariff rate for the buyer country, your cost of goods, the shipping the carrier actually invoices you, and the Offsite Ads position. The breakdown re-renders when you change one. Etsy renders prices in the viewer’s currency, so the extension works in the listing’s currency, labels the two fixed US sums as US facts, and makes every rate overridable. Where each rate comes from is written out, with sources, in the 2026 fee schedule guide on this site.

How to install the Etsy fee calculator extension

1. Open the extension’s page in the Chrome Web Store, or open the store and search for it by name, Etsy Fee and Tariff Calculator.
2. Confirm the install. Chrome will tell you the extension can read and change your data on www.etsy.com: that is how Chrome words host access for a script that draws a popover on listing pages. Nothing broader is requested.
3. No account and no sign-up exist. The install finishes in seconds; there is nothing to configure before first use.
4. Open any Etsy listing. When the page shows a price, the popover appears under it.

If you would rather check the math before adding anything to Chrome, the same fee engine runs as a web calculator on this site, with the full formula written out and nothing to install.

How to run a breakdown

Open the listing, expand the popover, and set four inputs:

1. Tariff rate for the buyer country. For US orders, the HTS duty rate for your product category and country of origin. Orders to buyers outside the United States take a 0, and the 0 run doubles as the rest-of-world scenario.
2. Cost of goods. Your materials or wholesale cost for one unit.
3. Your real shipping cost. What the carrier invoices you, not what you charge the buyer.
4. The Offsite Ads position. Off for a clean run, then 15%, then 12% if your shop passed $10,000 in the trailing 12 months. One run per position, because the answer is a range, not a number.

On a worked $65 print shipped to a US buyer at a 30% rate, the chain keeps $16.07 of the $70 the buyer pays; with Offsite Ads on, $5.57; with the rate at 0, $31.90. The full arithmetic, line by line, is in the fee calculator guide, and the tariff extraction itself, why the duty is the rate over (1 plus the rate) of the price rather than a share of it, is worked through in the Etsy tariffs guide.

Your inputs persist in browser storage on the device, so the rate and costs you set follow you to the next listing you open.

What is free, and what Pro adds

The full breakdown on your first listing is free, tariff line included. From the second distinct listing on, the full breakdown is part of Pro, announced at $3 a month: profit on every listing in your shop, tariff modeling per destination country, and margin alerts. Payments open with the first Pro release, and until then the Pro button opens a waitlist on the landing page rather than a checkout. The web calculator keeps the whole engine free with no listing limit, so single runs never depend on the tier.

What the extension does with your data

Nothing leaves your device. The permission list is storage plus Etsy listing pages, and the code carries no fetch, no XMLHttpRequest, and no beacon anywhere; a build-time test fails the build if any committed file adds a network call. There is no account, no analytics, and no tracking, and your inputs live in browser storage locally. That frugality is also a standard worth holding any fee extension to: if one asks for broad permissions, tabs, history, or wide host access, the fee math does not need them, and you should ask what does.

The same no-network rule carries my other browser extension: Trial Radar reads the subscriptions and free trials already sitting in your Gmail, lists what is about to charge in the next seven days, and takes you to the right cancel page in one click. Your mail never leaves the device there either.

Four checks before you trust any Etsy fee extension

1. Does the fee base include the shipping the buyer pays? The 6.5% transaction fee and payment processing apply to it. On a $65 item with $5 shipping, an item-only estimate misses real fee money.
2. Does the tariff math pull the duty out of a DDP price correctly? The duty inside a DDP price is the rate over (1 plus the rate) of it. Thirty percent of $65 is $19.50; the real duty is $15.00.
3. Is the 15% Etsy fee on the tariff money present? Since July 9, 2026, every US order from a shop outside the United States carries the duty inside the price and Etsy’s cut of it, the line most calculators still miss.
4. Does the tool point back to your statement? The monthly statement in the seller cabinet is the only exact record. Etsy’s own duty estimate runs through its partner Zonos, and sellers who checked it report a $1.99 handling fee and 10% of the duty on top, with the fee on the tariff itself not estimated at all.

The short version

Install it, open a listing, expand the popover, set the rate, your costs, and the ads position, and read the answer as a range. One permission, zero network calls, and the fee list that 2026 actually charges, tariff line included. The extension is young, live since September 5, 2026, and its public counters are tracked in the open on this site; how it is built and maintained is written up too. And when the fee stack, not your product, becomes the thing limiting the margin, the ecommerce services hub covers the builds that move a shop onto its own ground.