FreeCalculators

Monthly Cash Flow Calculator

Analyze your monthly cash flow with our tool. Compare income against expenses to gain insights into your financial health.

Personal Finance · Reviewed by FreeCalculators Editorial · Updated 2026-09-01

How it works

The Monthly Cash Flow Calculator helps you evaluate your financial situation by comparing your total income against your total expenses. To calculate your cash flow, we use the formula: Cash flow = Total income − Total expenses. For example, if your salary is $3,500, side income is $500, investment income is $100, and other income is $0, your total income would be $4,100. Your fixed expenses total $2,000, variable expenses are $800, and debt payments are $300, resulting in total expenses of $3,100. By subtracting your total expenses from your total income, you find your cash flow: $4,100 - $3,100 = $1,000. Additionally, to determine your cash flow as a percentage of your income, use the formula: Cash flow % = (Cash flow ÷ Total income) × 100. In this case, it would be ($1,000 ÷ $4,100) × 100, giving you approximately 24.39%. This insight allows you to assess your financial health and make informed decisions about budgeting and saving.

Formula


                Cash flow = Total income − Total expenses | Cash flow % = (Cash flow ÷ Total income) × 100
              

Tips

  • Track all sources of income, including side hustles and investments, to get an accurate picture of your cash flow.
  • Regularly review and categorize your expenses to identify areas where you can cut back.
  • Set a monthly savings goal based on your cash flow to build an emergency fund or invest for the future.
  • Consider using the cash flow surplus to pay down debt faster, which can improve your financial health in the long run.

Frequently asked questions

What is considered total monthly income?
Total monthly income includes salary, side income, investment income, and any other income sources. For example, if you earn $3,500 from your salary, $500 from side income, and $100 from investments, your total income is $4,100.
How do I calculate my total monthly expenses?
Total monthly expenses are the sum of fixed expenses, variable expenses, and debt payments. For instance, if your fixed expenses are $2,000, variable expenses are $800, and debt payments are $300, your total expenses would be $3,100.
What does a positive cash flow indicate?
A positive cash flow indicates that your income exceeds your expenses, which is a sign of good financial health. For example, if your cash flow is $1,000, it means you have $1,000 left after covering all your expenses.
How can I improve my cash flow percentage?
To improve your cash flow percentage, increase your income or reduce your expenses. For instance, if you currently have a cash flow of $1,000 and total income of $4,100, consider increasing your income through side jobs or cutting down on discretionary spending.