Support
The Kopi Notes is free. A kopi keeps it that way.
Everything here — the guides, the 120+ calculators, the free Playbook and the weekly email — is free, and stays free. There is no paywall, and the site is kept deliberately ad-light.
If something here saved you a decision, or an afternoon of spreadsheet wrangling, and you feel like saying thanks, you can buy me a kopi. It is completely optional, and reading is thanks enough.
One-off, any amount, no account needed. It goes straight to keeping The Kopi Notes independent.
Rather not, or not right now? That is genuinely fine. The best support costs nothing: read the free Playbook, use the calculators, and forward a Sunday email to someone it would help.