In plain words: type what you take home each month and what you spend on the main categories. The calculator subtracts spending and savings from income, shows what is left and tells you what share of your income each category uses.
Last updated by Hira Science Academy. Educational tool; see the limitations section below.
What this monthly budget calculator does
This monthly budget calculator compares your take-home income with your main spending categories and planned savings, then shows what is left. You get the remaining balance, the share of income each category takes, your savings rate and a comparison with the 50/30/20 rule of thumb. It is deliberately simple: a snapshot you can build in a minute and adjust as often as you like. A positive balance means some income is unassigned. A negative balance means the amounts you entered exceed income. Once you know your monthly surplus, project what it could become in the savings calculator, or see whether a loan payment fits using the loan repayment calculator.
How to use the monthly budget calculator
- Enter your monthly take-home income: the pay that reaches your bank account after tax.
- Enter a monthly amount for each category. If a bill is quarterly or yearly, divide it to get a monthly figure.
- Enter the amount you plan to save each month.
- Press Calculate. Read the remaining balance, then the category shares and the 50/30/20 comparison.
- Adjust one category at a time to see the effect, or press an example chip to see a ready-made budget.
The budget formulas
The same arithmetic can be checked with the percentage calculator.
Worked examples
Example 1: the default budget on $3,000 a month
- Spending: 900 + 250 + 450 + 200 + 150 + 250 = $2,200. Planned savings: $300.
- Total allocated: $2,500. Remaining: \(3{,}000 - 2{,}500 = \) $500 a month, or $6,000 a year.
- Budget used: \(2{,}500 / 3{,}000 \times 100 = \) 83.3%. Savings rate: 10.0%.
Example 2: a budget that overspends
- Income $2,400. Housing 1,100, utilities 300, food 500, transport 250, debt 200, other 250, savings 100.
- Total allocated: $2,700, which is 112.5% of income.
- Remaining: \(2{,}400 - 2{,}700 = \) −$300 a month. The calculator shows the shortfall in red.
- Options: cut "other" spending, renegotiate a bill, pause savings briefly or raise income.
Example 3: a zero-based budget in PKR
- Income ₨150,000. Housing 45,000, utilities 15,000, food 40,000, transport 12,000, debt 8,000, other 15,000, savings 15,000.
- Total: ₨150,000. Remaining: ₨0. Every rupee has a job, which is the idea of zero-based budgeting.
- Choose PKR in the currency list to try it.
Example 4: applying 50/30/20 to $4,000 a month
- Needs: \(0.50 \times 4{,}000 = \) $2,000.
- Wants: \(0.30 \times 4{,}000 = \) $1,200.
- Savings and extra debt repayment: \(0.20 \times 4{,}000 = \) $800.
- If your housing alone is $1,800, you may need to flex the split. The percentages are a starting point.
What a typical split looks like
The table shows the default budget as shares of a $3,000 income. Housing is often the largest single line, and comparing your own shares with a sample helps you spot categories worth reviewing.
| Category | Amount | Share of income |
|---|---|---|
| Housing | $900 | 30.0% |
| Utilities and phone | $250 | 8.3% |
| Food and groceries | $450 | 15.0% |
| Transport | $200 | 6.7% |
| Debt payments | $150 | 5.0% |
| Other spending | $250 | 8.3% |
| Planned savings | $300 | 10.0% |
A sample for illustration, not a recommendation. Costs differ widely by country, city and household.
What to include in each category
- Housing
- Rent or mortgage payments, plus any regular building or service charges you pay monthly.
- Utilities and phone
- Electricity, gas, water, internet and mobile bills.
- Food and groceries
- Groceries and household food. Many people track restaurant meals under other spending.
- Transport
- Fuel, public transport, parking, vehicle insurance and maintenance.
- Debt payments
- Minimum monthly payments on loans and cards. Extra repayments can be entered under planned savings.
- Other spending
- Eating out, subscriptions, clothes, entertainment, gifts, health costs that are not covered elsewhere.
- Planned savings
- Emergency fund, retirement or long-term investing, and goal funds. Entered as an amount you commit, not what happens to be left.
Budgeting methods you can try with this calculator
- 50/30/20 rule
- About 50% of take-home pay for needs, 30% for wants and 20% for savings and debt repayment. A simple starting guideline; high-cost areas may need a different split.
- Zero-based budget
- Assign every unit of income to a category until the remaining balance is exactly zero. Use the remaining balance as your checker.
- Pay yourself first
- Set the savings amount first, then fit spending around it. Enter savings first and adjust the other categories until the balance is not negative.
- Envelope or category caps
- Give each flexible category a fixed monthly cap. The calculator's category shares show whether a cap is realistic.
Handling irregular income and yearly bills
- Irregular income. Use a conservative figure, such as your lowest typical month, and treat any extra as a bonus to assign later.
- Yearly or quarterly bills. Divide by 12 (or 3 for a monthly view of a quarterly bill) and include the result each month so the money is there when the bill arrives. Use the average calculator to smooth uneven months.
- Joint households. Enter combined take-home income and combined spending, or run one budget per person.
- Cash and gifts. Include a realistic "other spending" amount. Budgets that leave no room for it tend to fail.
Common mistakes to avoid
- Entering gross pay. Use take-home income after tax, or the percentages will look better than they are.
- Mixing time periods. Convert every amount to monthly before entering it.
- Forgetting irregular costs. Annual insurance, school fees, repairs and festivals can break an otherwise balanced month.
- Treating savings as leftovers. Entering a fixed savings amount first usually works better than saving whatever remains.
- Setting the budget once. Review it every month and after any change in income, rent or debt.
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Assumptions and limitations
- Monthly amounts only. Convert weekly, quarterly and yearly costs to a monthly figure before entering them.
- Take-home income. Enter income after tax and deductions.
- Simple categories. Seven spending lines are enough for a snapshot but not for detailed tracking.
- Guidelines are not rules. The 50/30/20 comparison is a rule of thumb; your circumstances may justify a different split.
- Privacy. The maths runs in your browser. The numbers you type are not sent to a Hira Academy calculation server. Like the rest of the site, the page loads Google Analytics and advertising scripts; see the Privacy Policy.
Frequently asked questions about the Monthly Budget Calculator
How do I make a monthly budget?
List your monthly take-home income, then your regular costs: housing, utilities, food, transport and debt payments. Add other spending and a planned savings amount. Subtract the total from your income. If the result is negative, reduce flexible categories until it is zero or positive.
What is the 50/30/20 rule?
The 50/30/20 rule suggests spending about 50% of take-home pay on needs, 30% on wants and putting 20% towards savings and extra debt repayment. It is a rule of thumb for getting started, not a requirement, and may need adjusting where housing costs are high.
What counts as a need and what counts as a want?
Needs are costs you must pay to live and work, such as housing, basic food, utilities, transport and minimum debt payments. Wants are optional, such as dining out, subscriptions and entertainment. Where an item sits can be a personal judgement.
How much of my income should I save?
Many guidelines suggest around 20% for savings and extra debt repayment, but the right amount depends on your income, costs, goals and emergency fund. Any consistent amount is better than none. Use the savings calculator to see what it could grow to.
What if my remaining balance is negative?
Your entered spending and savings exceed your income. Look for the largest flexible category to trim, check for subscriptions you do not use, review whether planned savings can be reduced temporarily, or look for ways to raise income. Small cuts in several areas are often easier to sustain.
Should debt payments be part of my budget?
Yes. Enter the minimum monthly payments in the debt field. If you plan to pay extra, you can add the extra amount to planned savings or other spending, and use the loan repayment calculator to see how much interest it saves.
How do I include yearly or quarterly bills?
Divide the bill by 12 (or by 3 for a quarterly bill) and include that monthly amount in the right category. Setting that money aside each month means it is there when the bill arrives.
What is a zero-based budget?
A zero-based budget assigns every unit of income to a category so that income minus spending and savings equals zero. It does not mean spending everything; savings and debt repayment count as assignments.
How big should an emergency fund be?
A common rule of thumb is three to six months of essential spending. Your own number depends on job security, dependants and insurance. Total your essentials here, then set it as a goal in the savings calculator.
Is this a replacement for budgeting software?
No. It is a quick planning snapshot. It does not track actual transactions, link to bank accounts or store your numbers. For detailed tracking, use a tool that records spending over time.
Is my data stored or sent anywhere?
No. The calculation runs in your browser and the values you type are not sent to a Hira Academy calculation server.
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The maths behind them
- Percentage Calculator for checking category shares
- Average Calculator for averaging uneven monthly bills
- Ratio Calculator for comparing needs, wants and savings
- Fraction Calculator for fractions of income
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