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SIP (Systematic Investment Plan) Calculator

Total Invested:
Estimated Returns:
Total Maturity Value:
function calculateSIP() { var monthlyAmount = parseFloat(document.getElementById('monthlyAmount').value); var annualRate = parseFloat(document.getElementById('returnRate').value); var years = parseFloat(document.getElementById('years').value); if (isNaN(monthlyAmount) || isNaN(annualRate) || isNaN(years) || monthlyAmount <= 0 || annualRate <= 0 || years <= 0) { alert("Please enter valid positive numbers for all fields."); return; } var i = (annualRate / 100) / 12; var n = years * 12; // Formula: FV = P × ({[1 + i]^n – 1} / i) × (1 + i) var maturityValue = monthlyAmount * ((Math.pow(1 + i, n) – 1) / i) * (1 + i); var totalInvested = monthlyAmount * n; var estimatedReturns = maturityValue – totalInvested; document.getElementById('resInvested').innerText = "$" + totalInvested.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('resReturns').innerText = "$" + estimatedReturns.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('resTotal').innerText = "$" + maturityValue.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('sipResult').style.display = 'block'; }

Understanding SIP: The Power of Compounding

A Systematic Investment Plan (SIP) is a disciplined method of investing in mutual funds or stocks where you contribute a fixed amount at regular intervals (usually monthly). This approach leverages Rupee Cost Averaging and the Power of Compounding to build long-term wealth.

How Does This SIP Calculator Work?

Our SIP calculator uses the future value formula for an annuity due. This assumes that each investment is made at the beginning of the month. The mathematical formula used is:

FV = P × ({[1 + i]^n – 1} / i) × (1 + i)
  • P: Monthly Investment amount
  • i: Periodic interest rate (Annual Rate / 12 / 100)
  • n: Total number of payments (Years × 12)
  • FV: Future Value (Maturity Amount)

Real-World Example

Suppose you start an SIP of $500 per month for a period of 10 years. If the expected annual rate of return is 12%:

  • Total Invested: $60,000
  • Interest Earned: ~$56,169
  • Total Maturity Value: ~$116,169

By investing just $500 monthly, your capital nearly doubles over a decade due to the compounding effect. The earlier you start, the more time your money has to grow.

Benefits of SIP Investing

  1. Financial Discipline: Automating your investments ensures you save before you spend.
  2. Market Volatility Protection: You buy more units when prices are low and fewer when prices are high.
  3. No Market Timing: You don't need to be an expert to start; consistency matters more than timing the market.

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