📊 SIP Calculator (India)

A Systematic Investment Plan invests a fixed sum monthly into Indian mutual funds. Put ₹25,000 a month for 10 years at 12 percent expected annual return and the maturity value is ₹58,08,476.91: ₹30,00,000 invested plus ₹28,08,476.91 of gains. This calculator projects any SIP in Indian number formatting.

SIPs work through rupee cost averaging: fixed installments buy more units when markets fall and fewer when they rise, which smooths entry prices automatically. The discipline matters more than the timing; missing the best months hurts more than catching them helps.

How to Use This Calculator

Enter the monthly SIP amount in rupees, the investment horizon in years, and the expected annualized return. The calculator compounds monthly and shows invested, gains, and maturity value.

The SIP Formula

Each installment compounds for its remaining months, and the (1+i) factor treats contributions as beginning-of-month. The formula assumes a constant return, which never happens; actual equity paths zigzag around it. Treat the projection as the center of a wide range, not a promise. XIRR on your actual statement is the truth; this calculator is the plan.

Step-up SIPs beat flat ones for salaried investors: raising the installment 10 percent yearly with each increment tracks income growth and can add 30-40 percent to maturity value over a decade. The best SIP is the one that survives job changes and market falls.

Worked Example

₹25,000 monthly, 10 years, 12 percent. i = 1 percent monthly, n = 120. FV = ₹25,000 x ((1.01^120 - 1)/0.01) x 1.01 = ₹25,000 x 232.339 = ₹58,08,476.91. Invested = ₹30,00,000. Gains = ₹28,08,476.91, which is 48.4 percent of the maturity value: compounding did nearly half the work.

Step-up version: start ₹20,000 and raise 10 percent yearly for 10 years at 12 percent. Maturity lands near ₹55-60 lakh despite starting lower, because later, larger installments still compound for years. The lesson: increasing the SIP with income beats starting big and stopping. For lump-sum investments alongside, our compound interest calculator handles one-time deposits.

SIP Realities

Taxation: equity fund gains held over a year face 12.5 percent LTCG above ₹1.25 lakh yearly (rules as of recent budgets; verify current law). Debt fund taxation changed in 2023. Choose direct plans over regular to avoid distributor commission drag of ~1 percent yearly, which compounds against you exactly like returns compound for you. Review yearly, rebalance occasionally, and never stop a SIP in a panic. For goal-based Indian planning, pair this with our future value calculator.

SIP vs Lump Sum: What the Data Says

Lump sums win when markets rise steadily, since all the money compounds from day one; SIPs win when markets fall early, buying cheap units. Over full cycles the difference is usually smaller than investors expect, a point or two either way. The real comparison is behavioral: lump sums demand timing courage few possess, while SIPs automate through fear and greed alike. Most investors’ actual returns trail their funds’ returns because of timing; SIPs close that gap.

The practical answer is both: deploy windfalls as lump sums into your allocation, run SIPs for monthly income, and never pause either in a panic. STP (systematic transfer plans) split the difference, parking lump sums in liquid funds and trickling into equity. Whatever the vehicle, the edge is time in the market and the discipline to stay: the data favors the investor who keeps investing over the one who times perfectly twice.

The XIRR Reality Check

Projected returns are tidy; actual SIP returns are lumpy, which is why XIRR matters. Your fund statement’s XIRR annualizes your actual cash flows: every installment in, every redemption out, timed exactly. Compare XIRR to the calculator’s projection yearly. Persistent gaps mean your timing, pauses, or fund choice differ from the plan, and the gap is actionable information, not failure.

Two XIRR traps: stopping SIPs during falls craters XIRR because you skip the cheapest units, and comparing XIRR across different periods misleads because markets differ. Judge a 10-year XIRR against a 10-year benchmark, not against last year’s hot fund. The calculator plans; XIRR audits. Run both, trust the audit, adjust the plan. Discipline compounds faster than brilliance.

SIP Dates and Market Timing Myths

Investors obsess over which date to SIP: 1st, 7th, 15th. Long-run studies show the difference is negligible, a few basis points either way, because monthly averaging washes out daily noise. Pick the date after your salary credit for reliability and stop thinking about it. The date debate is procrastination wearing analysis clothing.

What actually matters is never missing an installment: a skipped SIP in a crash month costs more than a decade of optimal dates. Automate with bank mandates, keep a buffer for the debit, and review yearly instead of monthly. SIP success is 5 percent date selection and 95 percent persistence. Automate the persistence.

Estimates for planning only, not financial advice.