Keeping the work
Your answer should outlive the tab — without us keeping a copy.
There is no account, no cookie and no local database. Everything you enter lives in the address bar, which means the link is the saved calculation: it restores every answer, and it works on someone else’s machine.
For anything you need to hand over, each calculator prints a one-page A4 statement carrying your inputs, the full working, the sources and their verification dates — the artifact you send to a conveyancer, accountant or migration agent.
Why the link is the save
A saved calculation normally means a row in someone's database, which means an account, which means an email address and a password and a record of what you earn. The address bar already holds every input, so it can do the same job with none of that. Copy it and you have saved the calculation. Send it and the other person opens exactly what you saw.
It also fails better. An account can be locked out, deleted or breached. A link is a string you keep.
What happens when the rules change
An old link recomputes against today's ruleset rather than replaying a stored answer. That is deliberate: if a rate moved between when you saved it and when you opened it, you want to know. The A4 statement is the opposite — a dated snapshot of what the rules said on the day, which is what makes it worth handing to someone.
- ShareCopy the address bar. The whole calculation travels with it.
- PrintA4 position statement, one page, sources and dates included.
- Re-checkOpen an old link and it recomputes against today's ruleset, so a rate change shows up.
- Nothing keptStatement inputs sit in the URL fragment, which browsers never send to a server.