Privacy policy

Last updated: 9 May 2026

Who runs this site

This site is run by an individual operator based in the Netherlands (referred to below as "the operator"). For privacy questions, contact financial-instruments@proton.me.

What data we collect directly

None. The calculator runs entirely in your browser. There is no sign-up, no contact form, and no comment system. The numbers you enter are encoded into the URL so you can share a scenario; that URL is not transmitted to any server controlled by the operator.

Cookies and third-party advertising

This site uses Google AdSense to serve advertisements. Google and its partners may set cookies in your browser to deliver ads, including personalised ads based on your visits to this and other sites. Google's use of advertising cookies and your opt-out options are described at policies.google.com/technologies/ads and google.com/settings/ads. You can also opt out of personalised advertising by third-party vendors at aboutads.info/choices and youronlinechoices.eu.

Analytics

This site does not use first-party analytics — no Google Analytics, no Plausible, no behavioural fingerprinting. Standard server logs at the hosting provider may briefly record IP addresses for abuse prevention.

Your rights under the GDPR

If you are in the European Economic Area you have the right to access, rectify, erase, restrict, and object to processing of your personal data, and to data portability. Because this site collects no personal data directly, most of these rights apply to advertising cookies set by Google — manage them via the links above. For complaints in the Netherlands, contact the Autoriteit Persoonsgegevens (autoriteitpersoonsgegevens.nl).

Children

This site is not directed at children under 16 and does not knowingly collect their data.

Changes to this policy

Material changes are reflected by updating the "Last updated" date above.