Budget Calculator

A budget is a comparison between money coming in and money already assigned to leave. This calculator focuses on that practical income-versus-expenses question. Enter monthly income, then list the major spending and saving categories that compete for it: housing, utilities, food, transportation, healthcare, insurance, debt payments, savings, entertainment, and other expenses. The result shows net income, total expenses, the savings rate, and a category-by-category breakdown as a share of income.

Unlike a rule-of-thumb calculator, this page does not assume that every household fits one standard split. It lets your actual categories tell the story. A family with high childcare costs, a renter with no car, and a homeowner paying down credit cards can all use the same structure, but their pressure points will be different. For a simplified allocation rule, compare this page with the 50/30/20 rule calculator or the 70/20/10 rule money calculator. If debt is the main issue, the debt-to-income calculator gives a lender-style ratio, while the grocery budget calculator zooms in on one flexible category.

How to use this calculator

Start with monthly income. For most households that means take-home pay after taxes and payroll deductions, because the budget is about cash you can actually spend this month. If you are paid weekly, multiply a typical weekly paycheck by 52 and divide by 12, or use the average of several recent months if income varies. If you want the plan to include pre-tax retirement contributions or payroll insurance premiums, add those amounts back as income and enter them in the appropriate expense or savings category.

Next, fill in the categories. Housing can include rent, mortgage payments, property taxes, insurance, HOA dues, and routine maintenance reserves. Utilities can include electricity, gas, water, trash, internet, and mobile service if you prefer to keep phone bills there. Food can include groceries and household consumables, while restaurants may fit better under entertainment or other expenses. Transportation can cover fuel, transit, parking, maintenance, and registration. Healthcare and insurance should reflect recurring costs that are not already deducted from your paycheck. Debt payments should include required minimums and any planned extra payoff. Savings should include emergency fund transfers, retirement contributions made from take-home pay, sinking funds, and other cash you intentionally set aside.

Finally, read the net income. A positive number means the entered plan has unassigned money left over. A negative number means the plan spends more than income. Either result is useful, but only if the inputs match reality rather than an ideal month.

Formula

The calculator adds the ten entered categories into one total:

$\text{total expenses} = \text{housing} + \text{utilities} + \text{food} + \text{transportation} + \text{healthcare} + \text{insurance} + \text{debt} + \text{savings} + \text{entertainment} + \text{other}$

It then subtracts that total from monthly income:

$\text{net income} = \text{monthly income} - \text{total expenses}$

Savings rate is based only on the savings field:

$\text{savings rate} = \frac{\text{savings}}{\text{monthly income}} \times 100$

Each category percentage is calculated the same way:

$\text{category share} = \frac{\text{category amount}}{\text{monthly income}} \times 100$

The form rejects nonpositive income and negative category amounts, because those values would make the percentages misleading.

Example: using budget

Suppose monthly take-home income is $5,000. The budget entries are the form defaults: housing $1,500, utilities $200, food $500, transportation $300, healthcare $200, insurance $150, debt payments $300, savings $500, entertainment $200, and other expenses $200. Total expenses are $4,050. The calculator subtracts $4,050 from $5,000 and reports net income of $950.

The same example creates a savings rate of 10.0%, because $500 divided by $5,000 equals 0.10. The category breakdown also explains where the money is going. Housing is 30.0% of income, food is 10.0%, savings is 10.0%, transportation and debt payments are each 6.0%, and the smaller categories fill in the rest. The note says you are saving 10.0% of your income, matching the calculation exactly: savings divided by income, not leftover cash divided by income.

If you raise the savings entry to $800 without changing anything else, total expenses rise to $4,350 and net income falls to $650. That is not bad if the extra savings is intentional. If the extra amount makes net income negative, the calculator is telling you that the plan needs a tradeoff somewhere else.

Applying the result

Use net income as a monthly control number. If it is positive, decide where that money should go before it disappears into miscellaneous spending. You might increase emergency savings, make an extra credit card payment, start a vacation sinking fund, or leave a checking account buffer. If it is negative, look first at timing and category realism. Annual insurance premiums, school costs, car repairs, gifts, and holiday travel often appear as surprises because they were not converted into monthly sinking funds.

The category percentages help you avoid arguing with isolated bills. A $150 subscription bundle may look small, but if entertainment is already high, it is part of a larger pattern. A $300 car payment may be manageable by itself, but transportation plus insurance, fuel, and repairs may reveal the true burden. Savings deserves the same treatment: if the savings rate is lower than you want, reduce a named category rather than hoping leftovers will appear.

For a household budget meeting, make one copy using current spending and another using planned changes. Test one adjustment at a time. Lowering housing usually requires a move or refinance, while lowering food or entertainment can happen this week. Debt changes slowly unless you make extra payments, so pair this tool with the debt payoff calculator when you want to see how a payment plan changes balances over time.

Tips for a stronger budget

• Base the first version on actual bank and card activity, not memory.
• Convert irregular bills into monthly amounts so the plan survives annual renewals.
• Keep savings inside the expense total if you want to pay yourself first.
• Separate minimum debt payments from extra payoff when you are comparing scenarios.
• Review after the month closes and adjust categories that were consistently wrong.
• Leave a small buffer for cash withdrawals, tips, postage, parking, and other easy-to-miss expenses.

Method and source limits

CFPB and MyMoney.gov support tracking income and expenses, but do not prescribe these categories. Every amount is user-entered; savings is included in total outflow and separately shown as a rate of income. Sources and linked guidance below were accessed July 9, 2026; later revisions are outside this page version.

Sources

• Consumer Financial Protection Bureau, Budgeting: How to create a budget and stick with it — consumer guidance on tracking income, expenses, and budgeting habits.
• MyMoney.gov, Spend — federal financial education guidance on spending decisions and planning.
• Consumer Financial Protection Bureau, What is a debt-to-income ratio? — background on how monthly debt obligations relate to income.