Budget Calculator
See what's left each month after tax and your spending, and how each category compares with common guidelines.
Change the values and press Calculate to work out your own figures.
Enter your income, tax rate and monthly spending by category.
| Category | A month | Of income | Guideline |
|---|---|---|---|
| Housing | $1,666.67 | 24.1% | 30% or less |
| Transportation | $478.33 | 6.9% | 15% or less |
| Debt payments | $250.00 | 3.6% | |
| Living | $1,000.00 | 14.5% | 15% or less |
| Healthcare | $200.00 | 2.9% | |
| Children and education | $100.00 | 1.4% | |
| Savings | $833.33 | 12% | 15% or more |
| Other | $691.67 | 10% |
Show the working
- left = income × (1 − tax) ÷ 12 − spending
How to use it
Enter your income, tax rate and monthly spending by category.
Enter amounts without commas or with them; rates are percentages (5 for 5%). Negative amounts are allowed where a sign means money paid out.
Key facts
left over = income × (1 − tax) ÷ 12 − spending
Guidelines
Common rules of thumb: housing no more than 30% of gross income, all transport under 15%, saving at least 15%.
Questions
What's left from $83,000 at 28% tax after $5,220 a month of spending?
About −$240 a month.
Formulas
left over = income × (1 − tax) ÷ 12 − spending
Sources
Limitations
- Results are estimates for planning, not offers or financial advice; lenders and banks may round, count days or time payments differently.
- Rates are nominal annual rates compounded as you choose; payments at a different frequency use the equivalent periodic rate.