以下のガイドはまだ日本語に翻訳されていないため、英語で表示しています。計算機自体はすべて日本語に対応しています。
この計算機の使い方
- Enter your monthly take-home pay, after taxes and payroll deductions.
- Keep the default 50/30/20 split or adjust the percentages so they total 100%.
- Optionally enter what you currently spend on essentials to see whether it fits the needs budget.
計算式
Each category is a percentage of take-home income. Needs are essentials such as housing, utilities, groceries, insurance and minimum debt payments. Wants are discretionary spending. Savings include emergency funds, retirement contributions and extra debt payments.
Needs = income × 50%
Wants = income × 30%
Savings & debt = income × 20%
Example
- Take-home pay $4,500/month.
- Needs $2,250; wants $1,350; savings and extra debt payments $900.
- That's $10,800 saved per year.
よくある質問
Where does the 50/30/20 rule come from?
It was popularized by Senator Elizabeth Warren and Amelia Warren Tyagi in the book All Your Worth as a simple framework for balanced spending.
What if my needs are more than 50%?
In high-cost areas that is common. Reduce wants first, or set a split such as 60/20/20 while working towards lower fixed costs.
Are debt payments needs or savings?
Minimum payments are needs. Any extra amount you pay to clear debt faster counts towards the savings category.