Privacy

Two things live here, and they are different.

The calculators

Nothing you type leaves your browser

Each calculator is a static page. The tax engine runs in your browser tab, on your device. Your salary, pension contributions, children and student loan are not transmitted anywhere; there is no server behind these pages to receive them.

No cookies, and no cookie banner

The calculator pages set no cookies and use no local storage. There is no banner because there is nothing to consent to.

The one thing that persists is the address bar: your figures are mirrored into the URL so a result can be linked and shared. That happens in your browser. A link you share carries the figures in it.

Analytics

If analytics are enabled on a deployment of this site, they are cookieless and collect no personal data and no cross-site identifiers: a page view, a referrer and a country.

The app

The email field on the front page starts an account at app.nomogram.uk. The address is passed to the app’s sign-in page, which sends a sign-in link through Supabase, the hosting and sign-in provider, in Ireland. Once you have an account the app stores your household — accounts, balances, holdings, income — in a database there, isolated to your household and readable by no one else. Holdings are priced once a day by a job that sends the ticker of each instrument, and nothing about who holds it, to a public market-data source.

The full notice — who is responsible, every processor, retention, and your rights — is the app’s privacy page.

Who is responsible

Nomogram is built and operated by its author, Enrique Alabort, in the United Kingdom. Contact hello@nomogram.uk. You can complain to the Information Commissioner’s Office at ico.org.uk.