About this site

Kakeibo Method is published by MomentumLab AI, an Australian company that also makes the Kakeibo app for iPhone and iPad. You should know that before you read anything else here, because it is the obvious reason to be sceptical of a site explaining why kakeibo is worth your time.

Why the site exists

Because the existing English material on kakeibo is interchangeable. Almost every page ranking for the subject is a prose explainer of the same length repeating the same four categories, and none of them will do the arithmetic with you, cite where household money actually goes, or tell you which of the four envelopes your savings target has to come out of.

So this site is built the other way round: 6 calculators that run in your browser, 294 savings targets worked out in3 currencies, 130 everyday expenses sorted into the four envelopes, and 3 guides for the places people actually get stuck. The reading is there when you want it and never in front of the number you came for.

The rules we publish under

• No unsourced statistics. The claim that kakeibo saves 20 to 35 percent circulates everywhere in this niche, including on a page our own parent company published before this site existed. We could not find a primary source for it, so we do not repeat it, and we say so on the pages where the temptation would be strongest.
• No invented testimonials or download counts. There are no quotes from imaginary users on this site and no install figures.
• Numbers come from the data. Every count in our copy is computed at build time from the file it describes, so a page cannot claim a library larger than the one it has.
• Honesty about alternatives. Our comparison pages say plainly where YNAB or the 50/30/20 rule is the better answer, because a comparison in which our own subject wins every category is an advertisement.
• No email wall. Nothing here is gated. When the printable pack lands it will be free and ungated too.

On the method itself

Kakeibo (家計簿) was published by Hani Motoko in 1904, and we have tried to tell that story accurately rather than exotically. She was Japan's first female newspaper journalist, the ledger appeared in the household magazine she edited with her husband, and it was written to give women a documented record of work they were already doing without recognition. It is a practical invention from the early twentieth century, not an ancient secret, and the full account is on the pillar page.

About the app

The app keeps the same four envelopes, the safe to spend figure and the monthly reflection questions on your phone, so the entry happens at the counter instead of from memory later. It has a free tier with ads and a paid tier without them. That is the extent of the commercial relationship between this site and that product: nothing here is gated behind it, and every calculator works whether or not you ever install it.

Contact

Corrections, particularly on the history or on anything numerical, are genuinely welcome: admin@momentumlab.ai. If you can point us at a primary source for the savings claim above, we will publish it and credit you.

Published by MomentumLab AI Pty Ltd, Australia. Nothing on this site is financial advice: it is arithmetic and a method, and your circumstances are not known to us.