Monthly Budget Calculator
See where your money goes each month with this free monthly budget calculator.
Enter your take-home income, regular expenses, debt payments, savings contributions, and other spending to calculate how much money you have left over each month — or whether your current expenses are higher than your income.
Your privacy matters: The calculator runs in your browser. The financial information you enter is not saved or transmitted by the calculator.
What Your Budget Results Mean
Your monthly balance is calculated by subtracting all of the expenses, debt payments, savings contributions, and other allocations you entered from your total monthly income.
A positive balance means you have money remaining after the amounts you entered.
A negative balance means your planned monthly spending and allocations are higher than your monthly income.
A balance close to zero means most or all of your income has already been allocated.
Having money left over does not necessarily mean you are spending too little, and having a small monthly margin does not necessarily mean your budget is unhealthy. Your circumstances, goals, income stability, debt, emergency savings, and other financial priorities all matter.
How to Use the Monthly Budget Calculator
Start with your average monthly take-home income. This is generally the amount deposited into your account after taxes, payroll deductions, and other deductions.
Then enter your typical monthly amounts for:
- home and essential expenses;
- debt payments;
- saving and investing;
- lifestyle and discretionary spending.
If an expense does not apply to you, leave the field blank or enter $0.
For expenses that change from month to month, consider using a reasonable monthly average rather than an unusually high or low month.
What Counts as Monthly Income?
For budgeting purposes, it is usually easiest to work with income you actually have available to spend.
Examples may include:
- employment take-home pay;
- self-employment income available for personal use;
- pension or retirement income;
- regular benefit payments;
- rental income available after relevant expenses;
- reliable side-income.
Avoid including uncertain future income simply to make the budget balance.
Don’t Forget Irregular Expenses
Some expenses do not arrive every month but still need to be paid.
Examples include:
- annual insurance premiums;
- vehicle maintenance;
- property taxes;
- gifts;
- holidays;
- school expenses;
- professional fees;
- home repairs;
- annual subscriptions.
One approach is to estimate the annual cost and divide it by 12.
For example, if you expect approximately $1,200 of vehicle repairs and maintenance during a year, budgeting $100 per month can make those costs easier to prepare for.
Should Savings Be Considered an Expense?
This calculator treats saving and investing as an allocation of your monthly income.
That means money you intentionally put toward an emergency fund, retirement, investments, or another savings goal reduces the amount shown as money left over.
This makes it easier to distinguish truly unallocated money from money you have already committed to a financial goal.
What If My Expenses Are Higher Than My Income?
A monthly shortfall means the expenses and allocations entered into the calculator are higher than the income entered.
That can be a useful signal to review your budget more closely.
You might examine:
- expenses that can be reduced;
- subscriptions or services you no longer use;
- discretionary purchases;
- debt payments and interest costs;
- opportunities to increase income;
- expenses that were entered incorrectly or counted twice.
The goal is not necessarily to cut every optional expense. A sustainable budget should still reflect your priorities and circumstances.
What Can I Do With Money Left Over?
If your calculator shows a monthly surplus, possible uses could include:
- building an emergency fund;
- paying down high-interest debt;
- saving for upcoming expenses;
- investing for long-term goals;
- increasing retirement contributions;
- creating additional room in your monthly budget.
The appropriate choice depends on your individual circumstances and priorities.
How This Calculator Works
The basic calculation is:
Monthly Balance = Monthly Income − Monthly Allocations
Monthly allocations include the expenses, debt payments, savings contributions, investments, and lifestyle spending entered into the calculator.
The category percentages are calculated as:
Category Percentage = Category Amount ÷ Monthly Income × 100
These percentages are provided to help you understand how your income is currently allocated. They are not targets or recommendations.
Calculator Assumptions
This calculator assumes:
- all amounts are entered on a monthly basis;
- all values use the same currency;
- income represents money available to budget;
- entered amounts reasonably reflect your typical monthly finances;
- blank fields represent $0.
The calculator does not account for taxes, inflation, investment returns, debt interest calculations, or changes in future income and expenses.
Frequently Asked Questions
Should I enter gross income or take-home income?
For a personal monthly budget, take-home income is generally the simplest number to use because it represents the money you actually have available after payroll deductions.
What if I’m paid every two weeks?
A biweekly pay schedule normally produces 26 pay periods per year rather than 24.
You can estimate average monthly take-home pay by multiplying your biweekly take-home pay by 26 and dividing the result by 12.
What if my income changes every month?
Consider calculating an average based on several representative months. If your income varies substantially, using a more conservative estimate may help you avoid building a budget around income that may not occur.
Should credit card purchases go under expenses or debt?
Regular purchases made with a credit card should normally be categorized according to what you purchased.
If you are paying down an existing credit card balance from previous spending, enter that repayment under debt payments.
This helps reduce the chance of counting the same purchase twice.
Should I include retirement contributions?
If the retirement contribution comes out of the take-home income you entered, include it under saving and investing.
If it was already deducted before the take-home pay reaches you, do not enter it again.
Does this calculator follow the 50/30/20 budget?
No. This calculator shows how your actual income is currently allocated without assuming that one budgeting method is appropriate for everyone.
You can use the separate 50/30/20 Calculator to compare your numbers with that framework.
Financial Disclaimer
Budget & Freedom provides calculators and educational information for general informational purposes only. Calculator results are estimates based on the information and assumptions entered and should not be considered financial, investment, tax, accounting, or legal advice.
Actual financial outcomes may differ. Consider your individual circumstances and, when appropriate, consult a qualified professional before making important financial decisions.