Kakeibo (家計簿, “household finance ledger”) is a budgeting method where you decide how much to save before the month starts, record every expense by hand, and review honestly at month end. Its power comes from the writing — the friction of recording a purchase is what changes behaviour. Budget Fury started life as a kakeibo app and keeps that loop intact.
Where kakeibo comes from
Kakeibo was published in 1904 by Hani Motoko, Japan's first female journalist, as a household ledger for women who ran the family finances but had no formal system for it. It spread because it worked, and because it required nothing but a notebook and a pen.
What separates it from a spending diary is the order of operations. A diary records what happened. Kakeibo decides what will happen — the saving target is set at the start of the month, before any spending — and then records against that decision. It is a plan with a ledger attached, not a ledger you hope will produce a plan.
The four questions
At the start of each month, kakeibo asks four questions. They look almost too simple. Answering them honestly is the whole method.
- How much money do you have? Income, and what you are actually starting the month with.
- How much would you like to save? Decided first, and treated as untouchable — not as whatever survives to the 30th.
- How much are you spending? Recorded as it happens, in the four traditional buckets below.
- How can you improve? Reviewed at month end, against the answer you gave to question two.
Question two is the one that does the work, and it is the one every automated finance app gets backwards. If saving is what is left over, it is never what is left over.
The four kakeibo categories
Traditional kakeibo sorts spending into four buckets, and the names matter because they force a judgement at the moment of recording:
- Survival (需要) — food, rent, transport, medicine. Things you genuinely cannot go without.
- Optional (欲求) — eating out, drinks, shopping. Things you chose.
- Culture (文化) — books, museums, music, courses. Spending that enriches you.
- Extra (予期せぬ) — gifts, repairs, the unexpected.
You will notice that this maps almost exactly onto the modern 50/30/20 rule — survival is needs, optional and culture are wants — with one addition that 50/30/20 lacks: a bucket for the irregular stuff, which is what sinking funds handle today.
Why writing it down still beats automatic tracking
The obvious modern objection is that a phone can log this automatically, so why do it by hand? Because the recording is the intervention.
When you type "$5.50 — coffee", three things happen in the same two seconds: you notice the amount, you assign it to a bucket (which forces you to admit whether it was survival or optional), and you see the running total move. That is a small feedback loop closing at the moment of the decision. An automated feed gives you a perfectly accurate report weeks later, when the loop is long closed and there is nothing to decide.
This is why people with three years of immaculately categorised bank data often have not changed a single habit, while people with a scruffy paper notebook cut their spending in two months. Kakeibo is not a bookkeeping method. It is an attention method.
Keeping a kakeibo on a phone
The paper version has two real weaknesses: the arithmetic is tedious and error-prone, and reviewing a year means flipping through twelve months of pages. Those are exactly the two things software is good at. Everything else about kakeibo should be left alone.
So a digital kakeibo has to keep the friction of recording (you still type each expense), keep the savings-first order (the target is set before spending), and add only the arithmetic and the review. An app that connects to your bank and categorises everything for you is not a kakeibo app — it has removed the only part that was doing the work.
Keep a kakeibo in Budget Fury
- Answer question one: what have you got?
On the Budget tab, enter your income for the month. Add your fixed expenses — rent, utilities, insurance — so the figure you are working with is what is genuinely available, not gross income.
- Answer question two: what will you save? Before anything else.
Go to Goals and add what you are saving for, with a target and a date. Budget Fury reserves the contribution at the top of the month. This is the kakeibo promise, made mechanical — the saving happens before the spending, not after.
- Set up your four buckets
In Categories, create categories matching the kakeibo buckets — survival, optional, culture, extra — or map them onto the Need / Want tags the app already uses. Then give the optional and culture spending monthly limits as Expense Envelopes.
- Answer question three: record every expense by hand
Use the + button as you spend, and choose the bucket each time. The arithmetic keyboard in the amount field handles splits and running totals, so you keep the habit without doing sums. This is the ledger, and it is meant to take a few seconds.
- Read the month like a ledger page
Open the calendar view. Each day shows what it cost, and tapping a day lists that day's entries — the digital equivalent of a kakeibo page, without flipping back through a notebook.
- Answer question four: review, and be honest
At month end, compare what you saved against what you said you would save, and look at the Need / Want split. Then set next month's target with what you learned. The review is not optional — it is where kakeibo does most of its work.
Common questions
What does kakeibo mean?
家計簿 — literally “household finance ledger”. It refers both to the notebook and to the method of keeping it.
Can you do kakeibo digitally, or does it have to be on paper?
Digitally works, as long as you still enter each expense yourself. What must not be automated is the recording — that is the part that changes behaviour. Automating the arithmetic and the monthly review is pure gain.
Is kakeibo the same as envelope budgeting?
They overlap but emphasise different things. Envelopes are about a spending limit you check before you pay; kakeibo is about awareness through recording and a savings target set in advance. They combine well, and in Budget Fury you can run both — envelope limits for the buckets, kakeibo's savings-first order for the goals.
Is Budget Fury a kakeibo app?
It began as one — the French App Store listing still carries the name — and the core loop is intact: decide savings first, record by hand, review the month. It has since grown a twelve-month forecast, envelopes and CSV import on top of that foundation.
A kakeibo that does the arithmetic and leaves the habit alone
Savings decided first, every expense entered by hand, and a calendar that reads like a ledger page. Free on iPhone, iPad and Mac.