Kakeibo Budget Calculator (Japanese Budgeting Method)
Plan a month the kakeibo way: income minus fixed costs and your savings goal gives the money you can spend, split by week into the four pillars — needs, wants, culture and extras.
How it works
Money to spend = income − fixed costs − savings goal · weekly allowance = money to spend ÷ weeks in the month · each pillar = money to spend × its share (extras = 100% − needs − wants − culture)
Kakeibo (家計簿, “household account book”) is a Japanese budgeting method created by journalist Hani Motoko in 1904. At the start of each month you write down income and fixed costs, decide how much to save, and spend only what is left — tracked by hand, week by week, in four pillars: needs (food, transport, medicine), wants (eating out, shopping), culture (books, museums, courses) and extras or unexpected costs. At the end of the month you reflect on what went well. The method’s strength is mindfulness, not complex software.
Worked example
With 3,000 of income, 1,400 of fixed costs and a 450 savings goal (a 15.00% savings rate), you have 1,150.00 to spend this month — 287.50 a week over 4 weeks. Split 50/30/10/10, that is 575 for needs, 345 for wants, 115 for culture and 115 for extras.
Sources: Wikipedia — Kakeibo · SoFi — What is the kakeibo budgeting method?
Frequently asked questions
What is the kakeibo method?
A Japanese budgeting journal from 1904: set a savings goal first, write every expense by hand in four categories, review weekly and reflect at month end on how to save more.
What are the four kakeibo categories?
Needs (survival: groceries, transport, medicine), wants (optional: dining out, shopping), culture (books, music, classes, museums) and extras (unexpected: repairs, gifts).
How much should I save with kakeibo?
Kakeibo lets you choose, but 10% to 20% of income is a common goal. You decide the amount before spending, so savings come first.
Do I need a special notebook?
No. Any notebook or this calculator plus a simple spreadsheet works; the key is recording every purchase and reviewing it weekly.
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Educational estimate, not financial advice. Your income, prices, taxes and returns will differ — use it to plan, then check the numbers against your own bank statements and, for big decisions, a qualified adviser.