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LunaCalc

Finance

Budget Calculator

Compare monthly income with living costs, debt payments, and savings allocations.

Calculator
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About this calculator

This monthly budget calculator groups recurring living costs, debt payments, savings, and other spending against take-home income.

Formula notes

living expenses = housing + food + transport + utilities + debt + other; total allocated = living expenses + savings; balance = income − total allocated.

Worked examples

  1. Example: income 5,000, living expenses 3,300, and savings 800 leave a 900 balance; the savings rate is 16%.
  2. With 8,500 monthly income, 5,100 living and debt expenses, and 1,700 savings, the remaining balance is 1,700 and the savings rate is 20%.

How to use it

  1. Enter monthly take-home income.
  2. Fill each spending category and planned savings.
  3. Use the balance and ratios to identify underfunded or overspent areas.

Frequently asked questions

Should savings count as an expense?

It is shown separately from living expenses but included in total allocated cash so the remaining balance stays accurate.

How do I include annual bills?

Divide their expected annual total by 12 and place the monthly provision in the closest category or other expenses.

Limits and interpretation

  • A monthly snapshot does not include irregular annual bills, inflation, income volatility, emergency events, or future changes in tax and benefit rules.
  • The categories are planning buckets rather than financial advice; affordability and savings targets depend on household obligations, liquidity, and risk tolerance.

References