Monthly Fee calculation script

**NOTICE: **We have launched a new feature called “Payment Widget” that allows you to promote credit payments by showing the customer information about monthly payment options by invoice or loan. Read more about the feature under: Payment Widget documentation.

If you have a product page where you want to display the monthly fee when paying the purchase with an account or loan.

Javascript function

function getMonthlyPayment(months, price, statementFee, yearInterestRate) {
  return (
    Math.round(
      ((yearInterestRate / 1200 +
        yearInterestRate /
          1200 /
          (Math.pow(1 + yearInterestRate / 1200, months) - 1)) *
        price *
        100) /
        100,
    ) + statementFee
  );
}

Example calculation

Example product page item : Account 12 month