SIP Calculator

SIP Calculator — How Small Monthly Investments Build Real Wealth

Most people overestimate how much they need to start investing. The truth is that wealth creation in India has never been more accessible — monthly SIP inflows hit a record ₹32,087 crore in March 2026, with over 9.72 crore active SIP accounts across the country. Behind each of those accounts is someone who decided to start with a fixed monthly amount and stay consistent

A Systematic Investment Plan (SIP) lets you invest a fixed sum every month into a mutual fund of your choice. You don't need to time the market, predict corrections, or start with a large lump sum. You need consistency and time — and this calculator shows you exactly what that combination produces.

The Mathematics of Starting Early

The single most important variable in SIP investing is not how much you invest — it is when you start. Two investors contribute the same total amount but at different life stages, and the difference in outcome can be significant.

Consider two scenarios. Investor A starts a ₹5,000 monthly SIP at age 25 and continues for 30 years. Investor B starts the same ₹5,000 SIP at age 35 and runs it for 20 years. Investor A puts in ₹18 lakh total. Investor B puts in ₹12 lakh. At a 12% annual return — a reasonable long-term assumption for diversified equity funds — Investor A's corpus grows to approximately ₹1.76 crore. Investor B's corpus reaches approximately ₹49 lakh. Same monthly amount, same fund, different start date — the gap is over ₹1.2 crore. That gap is the cost of waiting a decade.

What Return Rate Should You Assume?

The SIP calculator asks for an expected annual return. This is where many investors either get too conservative or too optimistic.

Large cap funds have delivered annualised returns of approximately 13–15% over 5 years, while mid cap funds have delivered 19–21% over the same period. These are historical figures and not guarantees — equity markets go through cycles. A reasonable planning assumption for a diversified equity SIP over a 10+ year horizon is 10–12% annually. Using 12% for long-term planning is neither aggressive nor naive — it reflects the historical performance range of broad market index funds and flexi cap funds in India

For conservative planning, use 10%. For moderate expectations, use 12%. Avoid assuming anything above 14% for long-term projections — it sets unrealistic expectations and leads to under-saving.

The Step-Up Strategy: Investing More as You Earn More

A standard SIP keeps your monthly contribution fixed. A Step-Up SIP increases it by a fixed percentage each year — typically 10% — to match income growth. This one adjustment makes a substantial difference to your final corpus.

A ₹10,000 monthly SIP at 12% over 20 years builds approximately ₹99 lakh. The same SIP with a 10% annual step-up reaches approximately ₹1.89 crore over the same period — nearly double. If your salary is growing, your investments should grow with it. Use FinBuddy's Step-Up SIP Calculator to model exactly how much this acceleration adds to your corpus.

SIP vs Lump Sum: Which Is Better?

Lump sum investing outperforms SIP when you invest at the bottom of a market correction. SIP outperforms lump sum when markets are volatile or at high valuations, because you continue buying units at lower prices during downturns — a benefit called rupee cost averaging.

For salaried investors with monthly income, SIP is the practical choice regardless of market conditions. It removes the pressure of market timing and enforces saving discipline automatically. For investors with a large surplus — a bonus, inheritance, or property sale proceeds — a lump sum combined with an ongoing SIP is often the most effective approach.

Common SIP Mistakes to Avoid

The most damaging mistake is stopping SIP during market corrections. This locks in losses and misses the recovery — which is precisely when compounding works hardest in your favour. Every major market correction in Indian equity history has been followed by a recovery that rewarded those who stayed invested.

The second mistake is choosing a fund based on last year's returns alone. The best SIP mutual funds for long-term wealth creation are those that have delivered consistent rolling 3-year and 5-year returns above their category benchmark across multiple market cycles — not just in a single good year

Start early, stay consistent, increase contributions as your income grows, and let compounding do the work.