Kakeibo: the Japanese money diary, explained for any salary
Kakeibo is a 120-year-old Japanese way to budget by writing every spend down and asking four questions. Here is how it works, a worked example, and how to keep one on paper or your phone.
By Virat Chauhan · · 5 min readKakeibo (say ka-keh-bo) means household ledger. You write down your income and fixed costs at the start of the month, set a savings goal, record every spend by hand, and review it weekly and monthly with four questions: how much came in, how much do I want to save, how much did I spend, and how can I improve. It works with any income and any currency because it is about noticing, not about strict rules.
Most budgeting methods start with numbers. Kakeibo starts with a question: do you actually know where your money goes?
For a lot of us, the honest answer is "roughly". Rent, yes. Groceries, more or less. But the coffees, the delivery fees, the small online orders, the subscriptions you forgot you had? Those blur together, especially now that paying is a tap on a phone. We wrote about that blur in tap to pay made spending invisible.
Kakeibo is an old, very simple answer to it. You write things down, and you look at what you wrote.
What is kakeibo?
Kakeibo (家計簿, said roughly ka-keh-bo) is Japanese for household ledger. It is credited to Hani Motoko, a journalist often described as Japan's first female reporter, who introduced a household account book in 1904 to help women run a home on a limited budget and still save (Wikipedia, Big Think).
More than a century later, the method has spread well beyond Japan, because it fits any income, any currency and any spending style. It does not tell you what to cut. It makes you notice, and then lets you decide.
How does kakeibo work?
There are four parts: a monthly start, a daily habit, a weekly check and a monthly review.
1. At the start of the month
Write down three numbers:
- Income for the month, after tax.
- Fixed costs, the things that leave your account no matter what: rent or mortgage, loan payments, phone, insurance, school fees.
- A savings goal, the amount you want left at the end.
Income minus fixed costs minus savings is what you have for everything else. That is your spending money for the month.
2. Every day: write down each spend
Each time you spend, write it down. The amount, what it was, and which of four groups it belongs to:
| Group | What goes in it | Examples |
|---|---|---|
| Needs | Things you need to live and work | Groceries, transport, medicine |
| Wants | Nice, but optional | Takeaway, new clothes, a streaming service |
| Culture | Things that feed your mind | Books, a museum, a class, a concert |
| Unexpected | Things you did not plan for | A repair, a gift, a doctor's visit |
The group is not a judgement. Sometimes a takeaway is the right call after a long day. The point is that you see the pattern later.
Traditionally this is done by hand, and that is deliberate. Writing takes a few seconds longer than tapping, and in those seconds you notice what you are doing. Some people find that the act of writing "third coffee this week" changes their behaviour more than any rule.
3. Every week: add it up
Once a week, total each group and compare it with your spending money. Are you on track for the month? Is one group growing faster than you expected?
This takes five minutes, and it is where kakeibo quietly beats a once-a-month budget. You catch a bad week while there are still three weeks left to balance it.
4. At the end of the month: the four questions
Kakeibo's heart is four questions you answer every month:
- How much money did I have coming in?
- How much did I want to save?
- How much did I actually spend?
- How can I improve?
The fourth question is the useful one. Not "how can I spend less on everything", but one specific change. "Cook on Wednesdays." "Cancel the gym app I never open." "Put the savings in a separate account on payday, not at the end of the month."
Write that one change at the top of next month's page.
A kakeibo example with real numbers
Here is a month for someone earning the equivalent of 3,000 in their local currency after tax. Swap in dollars, euros, pesos or rupees; the shape is the same.
| Amount | |
|---|---|
| Income | 3,000 |
| Fixed costs (rent, phone, transport pass, insurance) | 1,550 |
| Savings goal | 300 |
| Spending money for the month | 1,150 |
At the end of the month, the totals look like this:
| Group | Spent |
|---|---|
| Needs | 610 |
| Wants | 390 |
| Culture | 60 |
| Unexpected | 140 |
| Total | 1,200 |
They went 50 over. Not a disaster, and the savings goal was mostly met. The review shows why: "Wants" was mainly food delivery on weeknights, and "Unexpected" was one phone screen repair.
So the one improvement for next month is concrete: cook two extra evenings a week, and set aside 20 a month for repairs so they stop being a surprise.
That is kakeibo. Notice, ask, change one thing.
Kakeibo vs the 50/30/20 budget
They work well together. The 50/30/20 rule gives you target proportions: roughly half for needs, a third for wants, a fifth for savings and debt. Kakeibo is the daily habit that tells you whether you are anywhere near those numbers.
If you like rules, start with 50/30/20 and use kakeibo to track it. If rules make you rebel, skip the percentages and just keep the diary. Many people find their spending improves simply from writing it down.
Tips that make kakeibo stick
- Log on the spot. Waiting until evening means half the small spends vanish. Ten seconds at the till is enough.
- Keep one place. One notebook or one app, not receipts in three pockets.
- Count cash and cards the same. A tap is still money.
- Include money you lend. If you cover a friend's share of dinner, write it down. It is real money until it comes back. We wrote a whole guide to tracking money lent to friends.
- Be kind in the review. The goal is to learn one thing, not to feel bad about thirty.
Can I keep a kakeibo on my phone?
Yes, with one condition: you still enter each spend yourself. Apps that silently import every bank transaction save time, but they skip the moment of noticing, which is the whole point of kakeibo.
doMahan works this way by design. You log a spend in a couple of seconds by typing or saying it, for example "spent 12 on lunch", in your own currency. It sorts spending into categories, including Lending for money you lend to friends, keeps a monthly budget, and puts your money on the same calendar as your tasks, so "what did I do today?" and "what did I spend today?" sit side by side. It never reads your SMS or bank messages. doMahan is free and in testing on Google Play, and you can join the beta here.
Paper is just as good. What matters is the habit: write it down, then ask why.
Quick answers
What does kakeibo mean?
Kakeibo is Japanese for household ledger or household account book. It is a simple budgeting method where you record income, savings goals and every expense, then reflect on your spending each week and month.
Who invented kakeibo?
Kakeibo is credited to Hani Motoko, often described as Japan's first female journalist, who introduced the household account book in 1904 to help women manage household money and save.
What are the four kakeibo questions?
How much money do I have coming in? How much would I like to save? How much am I spending? How can I improve? You answer the first two at the start of the month and the last two at the end.
Does kakeibo work on a phone or does it have to be on paper?
Traditionally it is handwritten, because writing slows you down and makes you notice each spend. A phone works too if you still log each expense yourself, rather than letting an app import transactions silently, and if you still do the weekly and monthly review.
Is kakeibo good for people with irregular income?
Yes. Freelancers and gig workers can use their lowest expected month as the starting income, then put anything above it straight into savings or a buffer. The weekly review is especially useful when income arrives unevenly.
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