How do you split your income with the 50/30/20 rule?
Take your income after tax and split it three ways: 50% for needs, 30% for wants, and 20% for savings and debt repayment. Put in your monthly income to see each amount in your currency, change the split if it does not fit you, and add what you spend now to compare.
What is the 50/30/20 rule?
A rule of thumb for splitting your income after tax into three parts: half for needs, 30% for wants, and 20% for savings and debt repayment. A worksheet from the US Consumer Financial Protection Bureau sets it out like this:
“Use the 50/20/30 rule to manage spending - apply 50 percent of your take-home pay to needs, 20 percent to savings and debt payments, and no more than 30 percent to your wants.”
The US Consumer Financial Protection Bureau, My spending rule to live by (checked 19 Sept 2026)
The worksheet gives the same three parts in another order, as 50/20/30, under the heading “A common rule of thumb”, and goes on: “Don’t feel discouraged, you can decide on your own personal rule to live by that works for your financial situation.”
That is why the calculator lets you change the percentages. It shows what a split gives each part and where your own spending sits against it. It does not tell you what to spend, and it is not financial advice.
What counts as needs, wants, and savings and debt repayment?
Needs are the costs you would still have to pay if you cut back everything you could. The worksheet counts mortgage or rent, food, clothing, transportation, utilities and child care.
Wants are the things you could stop or put off for a while, such as eating out, holidays, entertainment and most subscriptions.
Savings and debt repayment is money you put aside or use to pay down what you owe. The worksheet counts credit card payments, retirement savings and emergency savings. Some guides count the minimum payments on a debt as a need instead. Where a cost goes is your decision, so choose once and keep to it.
How do you compare the split with what you spend?
Put in what you spend in a month on needs and on wants. The calculator shows each beside its part of the split, and the difference. You do not type what goes to savings and debt repayment: it is what your income leaves after the other two, and the calculator works it out.
A month from your own records is better than a guess, because small costs are easy to forget. If your spending changes from month to month, a typical month works too.
How does the worked example add up?
You take home $4,200 a month after tax. Rent, food, utilities, insurance and getting to work come to $2,350 a month, and eating out, streaming and weekends away come to $1,100.
The 50/30/20 rule gives $2,100 to needs, $1,260 to wants, and $840 to savings and debt repayment. Your needs are $250 above their part and your wants $160 below theirs, so you have $750 left for savings and debt repayment, $90 below its part.
Whether to change what you spend or change the split is your decision. The calculator only shows where the figures sit.
How is it worked out?
For one month, in one currency:
needs = income × needs %, rounded
wants = income × wants %, rounded
savings and debt = income − needs − wants
left, as you spend = income − spent on needs − spent on wants
difference = what you spend (or have left) − its part of the split
Needs and wants are each rounded to the smallest unit your currency uses, such as a cent, or a whole yen for the Japanese yen. Savings and debt repayment is what is left, so the three parts always add up to exactly your income, and any rounding difference, never more than one unit, is in that part. Percentages are counted to two decimal places.
The calculator does not know your taxes or deductions, so start from the income that actually reaches you.
Questions
- What is the 50/30/20 budget rule?
- A rule of thumb for splitting your income after tax into three parts: 50% for needs, 30% for wants, and 20% for savings and debt repayment. A worksheet from the US Consumer Financial Protection Bureau gives it as a common rule of thumb: “apply 50 percent of your take-home pay to needs, 20 percent to savings and debt payments, and no more than 30 percent to your wants.” It is a starting point, not a requirement, and you can change the percentages to fit your own situation.
- Is the 50/30/20 rule based on income before or after tax?
- After tax: the money that actually reaches you each month, often called take-home pay or net income. If tax, pension contributions or insurance are taken from your pay before you receive it, start from what is left. If your income changes from month to month, a typical month gives you a figure to work with.
- What counts as needs, and what counts as wants?
- Needs are the costs you would still have to pay if you cut back everything you could, such as rent or mortgage payments, food, utilities, transport, clothing and childcare. Wants are the things you could stop or put off, such as eating out, holidays, entertainment and most subscriptions. Guides differ on debt: the Consumer Financial Protection Bureau's worksheet counts credit card payments with savings and debts, while others count the minimum payments as needs. Where a cost goes is your decision, so choose once and keep to it.
- What if my needs take more than 50% of my income?
- Then what you spend differs from the rule. The 50/30/20 calculator shows by how much, for each part, in your currency, and does not judge it. The rule is a rule of thumb: you can type your own percentages, such as 60/20/20, and see what each part comes to.
- Can I change the 50/30/20 split?
- Yes. Type your own percentages for needs, wants, and savings and debt repayment. They have to add up to 100, and the calculator says so when they do not. Needs and wants are rounded to the smallest unit of your currency, such as a cent, and savings and debt repayment is the rest, so the three parts always add up to exactly your income.
- Is anything I type into the 50/30/20 calculator sent anywhere?
- No. The 50/30/20 calculator works everything out in your browser and sends no request of its own. Your income, your percentages and what you spend never leave it.
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