Free calculator
Split your income with the 50/30/20 rule
Use the rule as a starting point, not a rigid requirement. Adjust it if essential needs exceed 50%.
- Amounts are calculated in your browser and are not sent to Smart Expenses.
- Educational tools. They do not replace financial, tax, accounting, or legal advice.
Methodology
Needs = 50%, wants = 30%, savings and debt = 20% of after-tax income.
Practical example
With $3,000 after tax: $1,500 needs, $900 wants, and $600 savings or debt.
How to interpret the result
The 50/30/20 rule is flexible: needs, wants, and savings/debt can shift when rent or income creates pressure.
Recommendations
- Log categories to see whether needs exceed 50% or wants absorb more than planned.
- Review the result before large flexible purchases.
Limitations
Educational tools. They do not replace financial, tax, accounting, or legal advice. It does not account for inflation, interest, taxes, or unexpected emergencies.
Frequently asked questions
Does the calculator store my data?
Amounts are calculated in your browser and are not sent to Smart Expenses.
What happens with invalid values?
The form asks you to correct empty, negative, or non-numeric fields before showing a result.
What are needs?
Rent, basic food, utilities, essential transport, and minimum payments.
Do savings and debt belong together?
The rule groups them, but tracking them separately is clearer.
What if needs exceed 50%?
Do not force the rule; use it to identify pressure.
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Build the habit in Smart Expenses
Install Smart Expenses to log daily expenses, review balances, and use reminders without connecting a bank account.