Hi, I’m Andrew. I built this because FIF tax made no sense to me either.

A couple of years back I had a handful of overseas shares and a looming IR3. The FIF rules read like a foreign language, and the spreadsheet I cobbled together took a whole weekend and still felt wrong.

So I built the thing I wished existed: a calculator that does FDR and the comparative-value method, picks the lower one, and shows its working against the IR461 examples. In plain English, for free.

It runs entirely in your browser. There’s no account to make and no server collecting your portfolio. Your numbers never leave this device. Exchange rates come straight from IRD’s published tables, so you can check every figure against the source.

I keep it accurate because I use it myself. If something looks off, or a broker changes its export and an import breaks, I genuinely want to hear about it. That feedback is what keeps the tool honest.