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50/30/20 Budget Calculator

Plan your budget with the 50/30/20 rule.

How it is calculated

The tool takes one number, your monthly income, and multiplies it by three fixed shares: needs = income × 0.50, wants = income × 0.30, savings = income × 0.20. The three shares always add up to 100% of the figure you enter, so nothing is left over. There are no other inputs: the percentages cannot be changed, and the tool does not know your rent, debts or tax. Amounts are shown in dollars with two decimals, and a negative or empty income returns no result. Because the split is applied to whatever number you type, it matters whether you enter take-home pay or gross pay; the 50/30/20 idea is normally applied to the money that actually reaches your account.

Worked example

Take a monthly take-home income of 3,200. Needs: 3,200 × 0.50 = $1,600.00. Wants: 3,200 × 0.30 = $960.00. Savings: 3,200 × 0.20 = $640.00. Check: 1,600 + 960 + 640 = 3,200. If your rent, utilities, groceries and minimum loan payments already add up to more than $1,600.00, the plan tells you that your essentials are above the 50% target.

Try this example →

Common mistakes

  • Entering gross salary instead of take-home pay, which inflates all three buckets.
  • Entering a yearly amount: the buckets are meant as monthly targets, so a yearly figure gives yearly buckets that are not comparable with monthly bills.
  • Putting minimum debt payments under "wants" or "savings"; they are a fixed obligation and belong with needs.
  • Treating the result as a rule to hit exactly. In a high-rent area needs may honestly be above 50%; the split is a benchmark to compare against, not a calculation of what you owe.

Sources

About this calculator

This calculator applies the 50/30/20 rule, a budgeting framework popularized by Senator Elizabeth Warren, which splits after-tax income into three buckets: 50% for needs (rent, groceries, utilities), 30% for wants (dining out, entertainment, subscriptions), and 20% for savings and debt repayment beyond the minimum.

It's aimed at people building their first budget who want a simple starting ratio rather than tracking every category from scratch, as well as financial coaches and counselors who use the framework as a quick diagnostic before drilling into a client's specific spending habits.

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Comments (1)

  • Editorial team

    The 50/30/20 split is a rule of thumb, and the percentages here are fixed. If your actual rent, bills and minimum debt payments already exceed the needs line, the plan is pointing at where the squeeze is, not telling you that you are doing something wrong. Enter take-home pay rather than gross. Which other split, such as one with a larger savings share, would you like to be able to try?

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