Calculate savings interest

calculate-savings-interest.js

function calculateSavingsInterest(
  numberOfMonths = 12,
  assetsFirst = 50000000,
  amountEachMonth = 15000000,
  percentageOfInterest = 5.35,
  skipFirstMonth = true,
) {
  const startAt = skipFirstMonth ? 1 : 0;
  let total = 0;
  for (let i = startAt; i <= numberOfMonths; i++) {
    total = i === startAt ? assetsFirst : total + amountEachMonth;
    let interest = (total * percentageOfInterest) / 100 / 12;
    total += interest;
  }
  return Math.round(total);
}

example:

calculateSavingsInterest(12, 50000000, 15000000, 5.35, true);