Privacy policy
Irish Car Import Calculator (browser extension) · last updated 8 September 2026
This is an unofficial browser extension. It is not affiliated with AutoTrader, Cazoo, CarGurus, DoneDeal, or the Irish Revenue Commissioners.
What runs locally and sends nothing
Everything the on-page badge shows — the GBP→EUR conversion and the estimated VRT, VAT, customs duty, NOx levy and landed-cost total — is computed in your browser from data already on the car-listing page, plus tax tables and an exchange rate bundled with the extension (and refreshed from the endpoints below). No listing you view, and no estimate you see, is sent anywhere.
What the extension fetches (outbound GET, no personal data)
| From | What | When |
|---|---|---|
api.frankfurter.dev | the GBP→EUR reference rate | daily, in the background |
atie-calibration.atie123.workers.dev/v1/calibration | the pooled calibration data (see below) | daily, in the background |
| the optional tax-table / NOx-lookup URLs in the extension's Options (empty by default) | updated tax bands | daily, in the background |
These are plain GET requests. As with any web request the receiving server sees your IP address at the network level; none of these requests carry an account, an install identifier, or anything identifying you, and the calibration service never reads or stores the IP address.
What the extension sends — only after you click “Verify”
“Verify” drives Revenue's public eVRT calculator (ros.ie) for the
specific car in a background tab. On a successful Verify, and
only then, the extension sends one anonymous record to the calibration
collector (atie-calibration.atie123.workers.dev, a Cloudflare
Worker; its source is in the project's open-source repository):
POST /v1/submit
- make, model, registration year and month, fuel type, engine size
- the listing's asking price converted to euros
- Revenue's returned Open Market Selling Price, VRT total, and the NOx figure the calculator was given
POST /v1/alias
Sent only if the automated Verify could not match the car in Revenue's dropdowns and you completed the lookup by hand:
- the listing's make, model and fuel type
- the make and model you selected in Revenue's dropdowns
What is deliberately not sent
- No listing URL, listing ID, dealer name, seller name, or phone number
- No postcode or location
- No user account, browser fingerprint, or per-install identifier
- No timestamp finer than the calendar day
- No cookies, no browsing history, no data from any other tab or page
The payloads are attributes of a third-party car listing
plus the output of a public government calculator. The
collector stores running totals only — one row per
distinct vehicle specification, accumulating sums and counts — never the
individual submissions, and the aggregation it publishes back
(/v1/calibration) is medians and ratios by coarse segment.
Why there is no on/off switch
Because there is nothing about you in any of it, and the estimate
only improves for everyone if the contribution is on by default. If you would
still rather send nothing, the extension is open source — set
COLLECTOR_URL to an empty string and build it from source; that
disables both the contribution and the calibration fetch.
Local storage
The extension stores, in your browser only
(chrome.storage / localStorage), the cached tax
tables, exchange rate and calibration data, your Options settings, and a
per-listing cache of any Verify result so it is not re-run. Removing the
extension, or clearing its data, removes all of it.
Data sale and use
No data is sold or transferred to third parties. Nothing collected is used for any purpose other than calculating and refining the import-cost estimate, and none of it is used to assess creditworthiness or for lending.
Contact
This is a personal open-source project. Please raise an issue on the project's repository.