Monthly Budget Calculator

Q: What income amount should I enter — before or after taxes?

Enter your take-home pay (after taxes and deductions). If you want to start with your gross pay instead, enter it and then fill in the Blended Income Tax Rate field. The calculator will estimate your after-tax income for you.

Q: How is the budget health score calculated?

The score goes from 0 to 100 and is based on four things: Savings rate — are you saving at least 15% of income? (up to 30 points) Housing cost — is it 25% or less of income? (up to 25 points) Debt payments — are they 10% or less of income? (up to 20 points) Balance — is every dollar assigned with no deficit? (up to 25 points)

Q: What do the green, yellow, and red badges on each category mean?

Green means you are within the recommended range. Yellow (amber) means you are slightly over or under the target. Red means you are well outside the guideline and should review that category.

Q: What does surplus and deficit mean?

A surplus means you earn more than you spend. That leftover money can go toward savings or debt. A deficit means you spend more than you earn. You need to cut expenses or increase income to fix it.

Q: Can I add expenses that are not listed?

Yes. Click the Add Expense button inside any category to create a custom line item. Type a name and an amount. You can add as many custom expenses as you need and remove them with the trash icon.

Q: Why does the calculator say my savings are too low?

The tool uses a guideline of saving at least 15% of your income . This includes retirement contributions, emergency fund transfers, and other savings. If your total is below 15%, the calculator flags it so you know to try to save more.

Monthly Budget Calculator

Updated Jul 21, 2026 By Jehan Wadia

Introduction

A monthly budget is a simple plan for your money. It shows how much you earn, how much you spend, and how much you have left over. When you know where your money goes, you can pay your bills on time, save for the future, and stop living paycheck to paycheck.

This monthly budget calculator makes the process easy. Enter your income, fill in your expenses across nine common categories like housing, food, transportation, and savings, and the tool does the math for you. It adds up your totals, compares your spending to recommended guidelines, and gives you a budget health score from 0 to 100. You also get a visual chart of your spending, step-by-step calculations, and clear alerts if any category is too high or too low.

Whether you are building your first budget or checking in on one you already have, this calculator helps you see the full picture of your finances in minutes. Start by entering your income below, and the tool will suggest a starting budget you can adjust to fit your real life.

How to Use Our Monthly Budget Calculator

Enter your income and expenses below to see a full monthly budget breakdown, a budget health score, and tips to improve your spending plan.

Choose Monthly or Annually: Pick how you want to enter your amounts. If you choose "Annually," the calculator divides each number by 12 to get the monthly amount. Use our annual income calculator if you need help converting your yearly earnings first.

Your Net Monthly Pay: Enter your take-home pay after taxes and deductions are removed from your paycheck.

Spouse / Partner's Net Monthly Pay: Enter your partner's take-home pay if you share a household budget. Leave blank if this does not apply.

Salary & Earned Income (Other): Enter any extra wages, freelance pay, or side job income not already listed above. If you need to convert an hourly wage, try the hourly to salary calculator.

Pension & Social Security: Enter any monthly pension or Social Security payments you receive.

Investments & Savings Income: Enter monthly interest, dividends, rental income, or other investment earnings.

Other Income: Enter any remaining income like gifts, alimony, or child support received.

Blended Income Tax Rate (%): Enter your combined federal, state, and local tax rate to see your estimated after-tax income. This field is optional. Leave it blank to use your income amounts as entered. If you are unsure of your rate, our effective tax rate calculator can help you estimate it.

Monthly Expenses: Fill in your spending for each category — Housing & Utilities, Transportation, Food & Groceries, Health & Personal Care, Children & Education, Debt & Loan Payments, Savings & Investments, Giving & Charitable, and Miscellaneous & Lifestyle. The calculator suggests starting amounts based on your income. Change any number to match your real spending. Use the "Add Expense" button inside any category to add a custom line item.

Calculate: Press the "Calculate" button to see your results. You will get a budget summary table, personalized feedback, a budget health score out of 100, category alerts, an expense breakdown chart, and a step-by-step explanation of the math behind your results.

Reset Calculator: Press "Reset Calculator" to clear all fields and start over.

What Is a Monthly Budget Calculator?

A monthly budget calculator is a tool that helps you see where your money goes each month. You type in how much you earn and how much you spend. Then it shows you if you have money left over or if you are spending too much. Pair it with our net worth calculator to get a complete picture of your financial standing.

Why You Need a Monthly Budget

A budget is a plan for your money. Without one, it is easy to spend more than you make. This can lead to debt, stress, and no savings for emergencies. A good starting point is to build an emergency fund that covers three to six months of expenses. When you track your income and expenses, you take control of your finances and make smarter choices with every dollar.

How This Calculator Works

Start by entering all the money you bring home each month. This includes your paycheck, your partner's paycheck, and any other income. Next, fill in your expenses across nine categories: housing, transportation, food, health, children, debt, savings, giving, and miscellaneous. The calculator adds everything up and tells you three things:

Your surplus or deficit — whether you have money left over or you are in the red.
Category alerts — which spending areas are too high or too low based on recommended guidelines.
A budget health score — a number from 0 to 100 that rates how balanced your budget is.

Recommended Budget Percentages

Financial experts suggest splitting your income into target ranges. For example, housing should be no more than 25% of your income — use a mortgage calculator or rent affordability calculator to check that your housing payment fits. Savings should be at least 15%, which can include 401(k) contributions, Roth IRA contributions, and 529 college savings. Debt payments like credit cards, student loans, and auto loans should stay at or below 10%. This calculator uses those guidelines to flag any category that needs attention. If a category is over or under its target, you will see a clear warning so you know exactly what to fix. You can also use a DTI calculator to check how your total debt payments compare to your income.

Tips for Balancing Your Budget

If your expenses are higher than your income, look at your biggest categories first. Small cuts to housing, food, or transportation make the largest difference. If you have a surplus, put that extra money toward an emergency fund or paying off debt using strategies like the debt snowball or debt avalanche method. Once your debts are under control, direct surplus funds into a savings account or investment account so your money can grow through compound interest. The goal is to give every dollar a job so nothing goes to waste. For long-term planning, explore our retirement calculator to see if your current savings rate puts you on track for the future.

Formulas used

Monthly Income (from annual amounts)

\text{Monthly Income} = \frac{\text{Annual Income Total}}{12}

Estimated After-Tax Monthly Income

\text{After-Tax Income} = \text{Gross Monthly Income} \times \left(1 - \frac{\text{Tax Rate}}{100}\right)

Monthly Surplus or Deficit

\text{Difference} = \text{Total Monthly Income} - \text{Total Monthly Expenses}

Surplus / Deficit as Percentage of Income

\text{Surplus \%} = \frac{\text{Difference}}{\text{Total Monthly Income}} \times 100

Category Percentage of Income

\text{Category \%} = \frac{\text{Category Subtotal}}{\text{Total Monthly Income}} \times 100

Budget Health Score

\text{Score} = S_{\text{savings}} + S_{\text{housing}} + S_{\text{debt}} + S_{\text{balance}}

Frequently asked questions

What income amount should I enter — before or after taxes?

Enter your take-home pay (after taxes and deductions). If you want to start with your gross pay instead, enter it and then fill in the Blended Income Tax Rate field. The calculator will estimate your after-tax income for you.

What is the blended income tax rate and how do I find mine?

Your blended tax rate is the total percentage of your income that goes to federal, state, and local income taxes combined. Check your last tax return and divide your total tax paid by your total income, then multiply by 100. If you already enter your net (after-tax) pay, leave this field blank.

Can I mix monthly and yearly amounts in the expense fields?

Yes. Each expense line has its own dropdown where you can pick Month or Year. If you pick Year, the calculator divides that amount by 12 automatically. You can use monthly for some items and yearly for others in the same category.

What are the suggested amounts that appear when I enter my income?

The calculator fills in a starting budget based on recommended spending percentages for each category. These are just suggestions. Change any number to match what you actually spend. The suggestions update when your income changes.

How is the budget health score calculated?

The score goes from 0 to 100 and is based on four things:

Savings rate — are you saving at least 15% of income? (up to 30 points)
Housing cost — is it 25% or less of income? (up to 25 points)
Debt payments — are they 10% or less of income? (up to 20 points)
Balance — is every dollar assigned with no deficit? (up to 25 points)

What do the green, yellow, and red badges on each category mean?

Green means you are within the recommended range. Yellow (amber) means you are slightly over or under the target. Red means you are well outside the guideline and should review that category.

What does surplus and deficit mean?

A surplus means you earn more than you spend. That leftover money can go toward savings or debt. A deficit means you spend more than you earn. You need to cut expenses or increase income to fix it.

Can I add expenses that are not listed?

Yes. Click the Add Expense button inside any category to create a custom line item. Type a name and an amount. You can add as many custom expenses as you need and remove them with the trash icon.

Why does the calculator say my savings are too low?

The tool uses a guideline of saving at least 15% of your income. This includes retirement contributions, emergency fund transfers, and other savings. If your total is below 15%, the calculator flags it so you know to try to save more.

Should I include retirement contributions that come out of my paycheck?

If your 401(k) or other retirement contributions are already taken out before your take-home pay, they are already accounted for. Only enter retirement savings in the Savings category if they are not deducted from your paycheck, like a separate IRA contribution.

What if I do not have a spouse or partner?

Leave the Spouse / Partner's Net Monthly Pay field blank or at zero. The calculator works for single-person budgets and household budgets alike.

Does this calculator save my data?

No. All numbers stay in your browser and are never sent to a server. If you close or refresh the page, your entries will be cleared. Write down or screenshot your results if you want to keep them.

What is zero-based budgeting?

Zero-based budgeting means your income minus your expenses equals zero. Every dollar has a job — spending, saving, or giving. This calculator helps you reach that goal by showing your surplus or deficit so you can assign any leftover money.

How often should I update my budget?

Review your budget at least once a month. Update it any time your income changes, you add or drop an expense, or your financial goals shift. Regular check-ins help you stay on track.

Can I use this calculator on my phone?

Yes. The calculator is fully responsive and works on phones, tablets, and computers. On smaller screens, the expense categories start collapsed so you can open only the ones you need.

What if my income changes from month to month?

Use your average monthly income from the last three to six months. If your income varies a lot, budget based on your lowest typical month. That way you are always covered, and any extra becomes surplus.

Why is the housing guideline 25% and not 30%?

Many financial experts now recommend keeping housing at 25% or less of your income. The older 30% rule can leave too little room for savings and other goals. This calculator uses 25% to encourage a stronger overall budget.

What counts as debt payments in the calculator?

The Debt & Loan Payments category includes credit card minimums, student loans, personal loans, medical debt, store cards, tax payment plans, and any other loan payments. It does not include your mortgage or car payment — those go under Housing and Transportation.

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