Your salary and inputs
The calculators run entirely in your browser. When you type a salary or pick a region, the result is worked out on your device; nothing is sent to a server to do it.
Your inputs are kept in the page address, so a result can be bookmarked or shared. That means:
- Anyone you send a link to sees the salary and options in it.
- Your browser keeps the address in its history, like any other page.
- When you open a link that already has inputs in it, the address, inputs included, reaches our web host along with the request for the page (see Our web host).
- PostHog records the address, inputs included, with the page views and clicks it counts (see Visitor statistics).
Copy link and Copy image put the link or a picture of your result on your own clipboard. The picture is drawn on your device and isn't uploaded anywhere. PostHog is told that you copied a link or a picture, but not what was in it.
Visitor statistics
We use two tools to see which pages and calculators people use, and to find errors in the site. Neither is told your name or email, and we don't use them for ads.
PostHog
PostHog is run by PostHog, Inc. We use its EU cloud, so your browser sends the data to eu.i.posthog.com, and loads PostHog's settings and some of its code from eu-assets.i.posthog.com. Our pages carry PostHog's code with them, so it runs on every page.
With every page you open, and with the clicks below, your browser sends PostHog:
- The page address, including any salary and options in it, the page title, and the site you came from, if your browser says.
- Your browser and its version, operating system, device type, screen and window size, language and time zone.
- A random ID for your browser and one for your visit, so PostHog can tell one visitor from many. It isn't linked to your name or email.
- Clicks on links and buttons and changes to form fields: which element it was and its label, but not what you type into a field. The address sent with them includes your current inputs.
- Four actions by name: starting a comparison (the two countries and the period), copying a calculator link, sharing a result picture (copied or downloaded), and opening or copying our email address. Each is also sent as a short log line with the page address.
- Errors in the page: the error message and where in our code it happened.
PostHog also receives your IP address, like any server, and uses it to estimate your country and city, which are kept with the data. Our PostHog project is set to discard the IP address itself rather than store it.
We haven't turned on PostHog's session recording or heatmaps, and we don't tell PostHog who you are.
There is no switch on the site to turn PostHog off yet, and it doesn't follow your browser's Do Not Track or Global Privacy Control setting. A content blocker that blocks PostHog stops all of it. Clearing this site's data in your browser deletes PostHog's cookie and ID, so you start as a new visitor.
Vercel Web Analytics
Vercel, Inc. is also our web host (see Our web host). Its Web Analytics script comes from our own address, and sends a page view to our own address each time you open a page.
A page view holds the page address, the site you came from, your country and region (worked out from your IP address), your browser, operating system and device type, and the time. Vercel says it keeps only filtered query parameters from the address, such as ?ref=, and doesn't store the IP address with the page view.
It sets no cookies and saves nothing in your browser. To count visitors, Vercel uses a code worked out from your request that changes every day, so it can't follow you from one day to the next or across sites.
A content blocker that blocks Vercel Web Analytics stops it.
What we save in your browser
Our theme and currency settings, and PostHog's ID for your browser: one cookie and a few entries in your browser's storage. Vercel Web Analytics saves nothing.
| Name | What it holds | Where | How long |
|---|---|---|---|
| netlands-theme | "light" or "dark", when you switch the theme | Your browser's local storage. Never sent to us | Until you clear your browser's site data |
| netlands-currency | A currency code such as "EUR", when you pick a currency in the top bar | Your browser's local storage. Never sent to us | Until you pick "Local currency" again or clear your browser's site data |
| ph_…_posthog | PostHog's random IDs for your browser and your visit, and the first address you opened on the site, inputs included | A cookie for this site only. Read by PostHog's code in the page, which sends the IDs with every event | One year from your last visit, or until you clear your browser's site data |
| ph_…_posthog | The same IDs and first address, and PostHog's settings for this site | Your browser's local storage | Until you clear your browser's site data |
| ph_… | An ID for the open tab, and how you arrived on the site | Your browser's session storage | Until you close the tab |
If you never switch the theme or pick a currency, nothing is saved for them: the site follows your system's light or dark setting and shows each country in its own currency.
When you open the site's main address, it sends you to the homepage in the first language your browser asks for that we have. Nothing is saved; you can switch language from the menu on any page.
Fonts
The site's two typefaces, Handjet and Schibsted Grotesk, are served by our own web host along with the pages (see Our web host). Your browser doesn't connect to Google or any other font service.
Our web host
The site is a set of static pages served by a web host, Vercel. Like every web server, the host receives your IP address, the page you ask for (including any inputs in its address), the time, and your browser's name and version. It uses them to deliver the page and to keep the service running and secure, and may keep them in short-lived server logs. We don't use these logs to count or follow visitors; the visitor statistics above are separate.
If you email us
If you write to us from the contact page, we receive your email address, your message and anything you attach. We use them only to reply and to fix the site, never for newsletters or marketing. We keep the email for as long as we need it to follow up, and delete it when you ask. PostHog counts that you opened or copied our address, but never sees your email.
What we don't do
- Ask for your name, email or any account
- Tell PostHog or Vercel who you are
- Use advertising or social media trackers
- Use cookies for ads or to follow you on other sites
- Sell or share anything about you, or use it for ads
We added PostHog and Vercel Web Analytics on 15 November 2026. For a few hours that day this page still said netlands used no analytics and set no cookies; it now describes both. If we add anything else, we'll update this page first and date the change in the changelog.
Your rights
Under the EU's General Data Protection Regulation you can ask what personal data we hold about you, have it corrected or deleted, and object to how it's used. We keep no accounts, but PostHog holds the statistics described above under a random ID. We can't tell which ID is yours unless you tell us: it's in the cookie whose name starts with ph_.
To make a request, email us.
You can clear the theme and currency settings and PostHog's cookie and ID yourself at any time by clearing this site's data in your browser. You also have the right to complain to the data protection authority in your country.
Changes to this page
When this page changes, we update the date at the top and note what changed in the changelog.
Updated 15 Nov 2026.