Personal finance
Monthly budget and surplus
Convert supplied income and spending frequencies into monthly equivalents, then separate debt payments and planned savings to show a surplus or shortfall.
Your inputs
Complete the fields for your selected method. Zero means intentionally zero, not unknown. Currency selection labels amounts; it does not convert exchange rates.
How this calculation works
monthly surplus = monthly-equivalent take-home income - monthly-equivalent expenses - separate debt payments - savings set-asides
A one-time monthly-equivalent budget, not an ongoing tracker, account balance or payment calendar. Weekly and biweekly amounts use52 and26 occurrences per year; actual payroll/calendar years can differ. Use income after actual chosen withholdings; no take-home tax estimate is made. Enter housing/debt payments and savings only once. Variable income, bill due dates and irregular timing can cause cash shortages even with a positive monthly average.
What information do I need?
Use records for the same job, equipment or accounting period. Only the fields for your selected entry method are required. An unknown amount is not zero.
Input definitions and where to find them
- Income after chosen withholdings: Use matching records or a clearly stated assumption for the indicated period. Prefilled figures are illustrative. An unknown value is not zero.
- Income source: Use matching records or an explicitly identified assumption for income source. Unknown is not the same as zero.
- Amount per occurrence (selected currency): Use matching records or an explicitly identified assumption for amount per occurrence. Unknown is not the same as zero.
- Receipt frequency: Use matching records or an explicitly identified assumption for receipt frequency. Unknown is not the same as zero.
- Expenses excluding separately entered debt and savings: Use matching records or a clearly stated assumption for the indicated period. Prefilled figures are illustrative. An unknown value is not zero.
- Expense: Use matching records or an explicitly identified assumption for expense. Unknown is not the same as zero.
- Amount per occurrence (selected currency): Use matching records or an explicitly identified assumption for amount per occurrence. Unknown is not the same as zero.
- Expense frequency: Use matching records or an explicitly identified assumption for expense frequency. Unknown is not the same as zero.
- Monthly debt payments not already in expenses (selected currency): Use matching records or a clearly stated assumption for the indicated period. Prefilled figures are illustrative. An unknown value is not zero.
- Planned monthly savings not already in expenses (selected currency): Use matching records or a clearly stated assumption for the indicated period. Prefilled figures are illustrative. An unknown value is not zero.
Use the Where to find this value controls beside the inputs for available work-it-out helpers. Estimates remain your assumptions; a helper does not verify the source figures.
Worked example
Example amounts use US dollars (USD).
Example answer: Monthly surplus or shortfall after planned allocations is $500.00 for the illustrative inputs below.
Example inputs
- Income after chosen withholdings
- Income source: Take-home pay
- Amount per occurrence: $3,000.00
- Receipt frequency: Monthly
- Expenses excluding separately entered debt and savings
- Expense: Living expenses
- Amount per occurrence: $2,000.00
- Expense frequency: Monthly
- Monthly debt payments not already in expenses: $300.00
- Planned monthly savings not already in expenses: $200.00
- Monthly surplus or shortfall after planned allocations
- $500.00
- Average monthly take-home income entered
- $3,000.00
- Average monthly non-debt expenses entered
- $2,000.00
- Separate monthly debt payments
- $300.00
- Separate monthly savings set-asides
- $200.00
- Budget comparison
- Supplied income exceeds planned allocations
These illustrative values are not recommended rates or industry averages. Replace every example input with your own figures.
Use the result well
Convert supplied income and spending frequencies into monthly equivalents, then separate debt payments and planned savings to show a surplus or shortfall.
Keep inputs on the same scope and time basis. Calculations retain precision internally; displayed values generally round to two decimal places, with extra precision for very small values and whole-unit rounding where required. Economic comparisons describe your supplied assumptions and do not guarantee future results.
This tool provides business arithmetic. It does not approve engineering designs, establish legal or tax treatment, select equipment or certify safe operating conditions.