THE NUMORIX GUIDE
How to use the Budget Calculator
Last reviewed September 14, 2026
What this calculator does
The budget totals housing, transportation, food, utilities, healthcare, insurance, savings, debt, entertainment, and other as monthly outflows.
Formula and method
The budget totals housing, transportation, food, utilities, healthcare, insurance, savings, debt, entertainment, and other as monthly outflows. Remaining income is monthly income minus that total. Savings rate and category percentages divide their respective amounts by monthly income; needs are housing, utilities, healthcare, insurance, and food, while wants are transportation, entertainment, and other.
Variables and inputs
Enter monthly income and ten monthly categories: housing, transportation, food, utilities, healthcare, insurance, savings, debt, entertainment, and other. Values are dollars per month. Savings is treated as an outflow in remaining cash and as its own percentage of income.
Worked example
Using $5,000 monthly income and the default categories, total outflows are 1,500 + 500 + 600 + 200 + 300 + 200 + 500 + 300 + 200 + 100 = $4,400. Remaining income is 5,000 - 4,400 = $600, savings rate is 500 / 5,000 = 10%, housing is 30%, needs are 2,800 / 5,000 = 56%, and wants are 800 / 5,000 = 16%.
How to interpret the result
The result shows whether entered monthly cash is allocated or left over and how selected categories compare with income. Because savings is included in total outflows, the remaining amount is cash after both spending and the planned savings transfer.
Common mistakes to avoid
Convert annual and irregular expenses into monthly amounts before entering them. Do not count the same debt payment in housing and debt. Keep savings separate if you want to distinguish planned saving from consumption, and remember the page's remaining figure already subtracts it.
Assumptions and limitations
The calculator has no dates, sinking funds, variable income, taxes, debt balances, interest rates, or annual expense schedule. Its needs and wants groups are fixed by the engine and should not be treated as a universal budgeting standard.