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Budget Calculator

Use this budget calculator to compare monthly income against housing, food, transportation, debt, savings, and other spending.

Planning estimate

Live calculator

Budget calculator

Money left$750.00

Income minus listed spending and savings.

Total allocated$4,250.00

85.0% of monthly income.

Savings rate15.0%

Savings divided by monthly income.

Use this as a planning estimate. Taxes, fees, rates, account terms, provider policies, local rules, and timing can change real-world results.

Formula

Budget formula

Money left = monthly income - listed monthly allocations

Savings is treated as an allocation so you can see whether the full plan fits income.

How to use

Steps

  1. Enter monthly income.
  2. Add major monthly spending categories.
  3. Include savings as a planned allocation.
  4. Review money left and savings rate.

Example

Sample calculation

Monthly income$5,000
Total allocated$4,250
Money left$750

Calculator use

Best for

  • Estimating savings, budget, debt, tax, interest, retirement, or net-worth scenarios before changing a money plan.
  • Comparing monthly contributions, withdrawals, balances, interest rates, payoff order, or tax assumptions with the math visible.

Before relying on it

Check first

  • Treating an estimate as tax filing advice, investment advice, guaranteed return, or an official account balance.
  • Leaving out fees, taxes, inflation, irregular bills, employer benefits, penalties, changing rates, or timing differences.
  • Comparing scenarios with different time horizons, compounding assumptions, or gross versus after-tax amounts.

Details

What to know before using the result

Take-home basisBest for reality

Monthly take-home income usually gives a clearer budget than gross income because taxes and paycheck deductions are already removed.

Irregular costsConvert to monthly

Insurance, medical bills, gifts, repairs, subscriptions, and annual fees should be averaged into monthly amounts so they are not missed.

Savings lineTreat as planned

Savings is included as an allocation because a budget that only works after skipping savings may be too tight for goals or emergencies.

Source notes

References used for this calculator

Consumer Financial Protection BureauRecommends drawing up a realistic monthly budget and including savings contributions in spending analysis.Consumer Financial Protection BureauProvides a monthly budget worksheet for comparing income with expenses and money left over.

Benchmarks

How to read the result

50/30/20: Common budget.

A simple framework: needs, wants, and savings/debt repayment.

0 or negative left: Tight.

The plan may need lower spending, more income, or revised savings targets.

10%+ savings: Progress.

A useful starting benchmark, though the right target depends on goals and debts.

Calculator accuracy

Methodology and assumptions

Formula, inputs, limitations and review record
Formula

Money left = monthly income - listed monthly allocations

Inputs used

Monthly income, Housing, Food, Transportation, Debt, Savings, Other spending

Limitations

Money results are planning estimates. Actual taxes, account terms, rates, fees, timing, local rules, and provider policies can change the real-world result.

Review record

Catalog QA baseline on June 6, 2026. This date marks the catalog-wide automated and editorial QA baseline, not a tool-specific expert review.

Cite this page

Toolkit Shelf. Budget Calculator. https://toolkitshelf.com/tools/budget-calculator

FAQ

Common questions

How do I make a monthly budget?

List monthly income, subtract planned expenses and savings, then adjust until the plan fits.

Should savings count as an expense?

For planning, it helps to treat savings as a monthly allocation so it does not get spent accidentally.

What if my budget is negative?

A negative result means listed allocations are higher than income, so one or more assumptions needs to change.