How Do You Calculate Cost Of Debt

When it comes to financial analysis and decision-making, calculating the cost of debt is a crucial step. Whether you are a business owner, investor, or simply curious about your personal finances, understanding how to calculate the cost of debt can provide valuable insights into your financial situation.


The cost of debt is calculated using the following formula: Cost of Debt = (Principal Amount * Interest Rate * Number of Years) / 100

How to Use

Using our cost of debt calculator is simple. Just follow these steps:

  1. Enter the principal amount, which represents the initial amount borrowed or owed.
  2. Input the interest rate as a percentage. This is the annual interest rate charged on the debt.
  3. Specify the number of years for which the debt will be outstanding.
  4. Click the “Calculate” button.
  5. The calculator will display the cost of debt in the result field.


Let’s say you borrowed $10,000 at an annual interest rate of 5% for 3 years. Using our calculator, you would enter:

  • Principal Amount: $10,000
  • Interest Rate: 5
  • Number of Years: 3

After clicking “Calculate,” you would find that the cost of debt is $1,500.


  1. What is the cost of debt?
    • The cost of debt represents the total interest expense paid on a loan or debt over a specified period.
  2. Why is it important to calculate the cost of debt?
    • Calculating the cost of debt helps individuals and businesses understand the financial impact of borrowing money.
  3. Can I use this calculator for personal loans?
    • Yes, you can use this calculator to determine the cost of debt for personal loans, mortgages, or any other type of debt.
  4. Is the interest rate annual or monthly?
    • The interest rate should be entered as an annual rate.
  5. What if I have variable interest rates?
    • This calculator assumes a fixed interest rate. For variable rates, you may need to make additional calculations.
  6. Is the cost of debt the same as the total repayment amount?
    • No, the cost of debt is the total interest paid on the debt, whereas the total repayment amount includes both the principal and interest.
  7. Can I calculate the cost of debt for a business loan?
    • Yes, this calculator can be used for business loans as well.
  8. What’s the significance of knowing the cost of debt for a company?
    • Understanding the cost of debt is essential for assessing a company’s financial health and making informed financial decisions.
  9. Is the cost of debt tax-deductible?
    • In many cases, the interest paid on debt is tax-deductible, but it depends on your specific tax situation.
  10. Is it better to have a lower or higher cost of debt?
    • Generally, a lower cost of debt is more favorable as it indicates lower interest expenses.


Calculating the cost of debt is a valuable financial skill that can aid individuals and businesses in making informed decisions about borrowing and managing debt. Our easy-to-use calculator simplifies the process, allowing you to quickly determine the cost of debt based on your specific financial circumstances. Understanding this cost can be a key factor in achieving financial stability and success.

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