Estimate your long-term savings and maturity value based on current interest rates.
Total Amount Invested:0
Total Interest Earned:0
Maturity Value:0
What is a Personal Provident Fund?
The Personal Provident Fund (PPF) is a popular long-term savings-cum-tax-saving instrument. It was introduced to mobilize small savings by offering an investment with reasonable returns combined with income tax benefits. PPF is considered one of the safest investment options because it is backed by the central government.
How the PPF Calculator Works
Our PPF calculator uses the standard compound interest formula applied to fixed annual installments. In a PPF account, interest is calculated on a monthly basis but credited to the account at the end of the financial year. The formula used for calculating the maturity amount is:
F = P [({(1+i)^n – 1}) / i] * (1+i)
F: Maturity Value
P: Annual Installment
i: Annual Interest Rate / 100
n: Total Number of Years
Key Features of PPF Accounts
Feature
Details
Lock-in Period
15 Years (can be extended in blocks of 5 years)
Investment Limits
Minimum 500 units and Maximum 1,50,000 units per financial year
Tax Status
Exempt-Exempt-Exempt (EEE) – Principal, Interest, and Maturity are tax-free
Interest Frequency
Compounded Annually
Example Calculation
If you invest 100,000 every year for 15 years at an interest rate of 7.1%:
Total Investment: 15,00,000
Interest Earned: 12,12,139
Total Maturity Value: 27,12,139
This demonstrates the power of compounding over a long-term horizon. Even small yearly contributions can grow into a significant corpus for retirement or major life events.
function calculatePPF() {
var p = parseFloat(document.getElementById('yearlyDeposit').value);
var r = parseFloat(document.getElementById('interestRate').value);
var n = parseFloat(document.getElementById('tenure').value);
if (isNaN(p) || isNaN(r) || isNaN(n) || p <= 0 || r <= 0 || n <= 0) {
alert("Please enter valid positive numbers in all fields.");
return;
}
// PPF Interest is compounded annually
// Formula for Maturity Value of an Annuity Due:
// F = P * [((1 + r)^n – 1) / r] * (1 + r)
var i = r / 100;
var maturityValue = p * ((Math.pow(1 + i, n) – 1) / i) * (1 + i);
var totalInvested = p * n;
var totalInterest = maturityValue – totalInvested;
document.getElementById('resTotalInvested').innerText = formatCurrency(totalInvested);
document.getElementById('resTotalInterest').innerText = formatCurrency(totalInterest);
document.getElementById('resMaturityValue').innerText = formatCurrency(maturityValue);
document.getElementById('ppfResult').style.display = 'block';
}
function formatCurrency(num) {
return num.toLocaleString('en-IN', {
maximumFractionDigits: 0,
minimumFractionDigits: 0
});
}