Household budget calculator
Bring recurring income and spending onto one period to see the household surplus or shortfall and its annual equivalent.
Every row is converted through its annual equivalent before being shown in this period.
Amounts are compared without currency conversion.
Income exceeds the spending entered for this comparison period.
Included
- Two recurring income rows
- Housing, utilities, insurance and debt as fixed-cost rows
- Food, transport and other variable-spending rows
- Weekly, fortnightly, monthly and annual normalization
- Surplus or shortfall, spending ratio and annual equivalents
Not included
- Judging whether a budget is adequate or sustainable
- Tax, benefits, inflation, interest and investment returns
- Irregular dates, calendar-month day counts and cash-flow timing
- Bank connections, transaction imports and financial advice
What this means
Recurring amounts cannot be compared until they share one period. This calculator annualizes each row using 52 weeks, 26 fortnights or 12 months, then divides by the number of periods in the selected comparison view.
The remaining amount is income − fixed costs − variable costs. A positive amount is a surplus in the chosen period; a negative amount is a shortfall. The annual figures use the same normalized rows, so their reconciliation is exact apart from display rounding.
The calculator compares only the amounts entered. It does not decide whether spending is appropriate, and it does not convert currencies.
Formula & worked example
annual row = amount × periods per year period row = annual row ÷ selected periods per year total spending = fixed costs + variable costs remaining = income − total spending spending ratio = total spending ÷ income × 100
Compare a monthly household budget
- Income
- 6,000
- Fixed costs
- 2,900
- Variable costs
- 1,550
- Total spending
- 4,450
The monthly surplus is 1,550; spending uses 74.2% of income and the annual surplus is 18,600.