SIP Comparison Calculator

What is a SIP Comparison Calculator?

A SIP comparison calculator lets you compare SIP scenarios side by side. Instead of running one calculation at a time and trying to remember the results, you enter three scenarios — each with its own monthly amount, expected return, and duration — and see the invested amounts, returns, and final corpus for all three at once. The scenario with the highest final corpus is highlighted, so you can immediately see which combination of inputs wins.

If you have ever wondered whether to "invest more" or "invest longer" or "invest in a higher-return fund", this calculator answers that question in seconds. When you compare SIP scenarios this way, the math often produces counter-intuitive results — a smaller amount over a longer period can beat a larger amount over a shorter one, and a 1% difference in expected return can swing the final corpus by lakhs of rupees.

At SIPlyy, the SIP comparison calculator runs entirely in your browser. Adjust any slider and all three scenarios recalculate instantly. No sign-up, no data leaves your device, no usage limits. Pair it with the SIP calculator for single-scenario projections and the SIP goal calculator for backward planning from a target corpus.

Why comparing SIP scenarios matters

Most investors choose their SIP amount and tenure by feel. "I can spare ₹10,000 per month" or "I will do this for 10 years and see how it goes". But small changes in inputs produce wildly different outcomes over long horizons — and the only way to see this clearly is to compare SIP scenarios side by side.

Consider three typical questions the comparison calculator can answer. First: should I increase my SIP from ₹10,000 to ₹15,000 per month, or keep it at ₹10,000 and invest for 5 more years? Second: should I stick with a Nifty 50 index fund at 11% or move to a flexi-cap fund that might deliver 12%? Third: if my spouse and I can jointly invest ₹25,000 per month, how should we split it across horizons — one short-term goal and one long-term, or both long-term?

These are not abstract questions — they determine whether you retire with ₹1 crore or ₹3 crore. Running the comparison takes 30 seconds and can change your financial trajectory for decades. The defaults above (₹10,000 vs ₹15,000 vs ₹10,000-for-20-years) are intentionally chosen to demonstrate the central lesson: time beats amount.

The math behind SIP comparison

Each scenario in the comparison uses the standard future value of an annuity formula, identical to the one in our SIP calculator:

FV = P × [((1 + r)^n − 1) / r] × (1 + r)

Where P is the monthly SIP amount, r is the monthly rate of return (annual rate ÷ 12), n is the number of months (years × 12), and FV is the future value. The (1 + r) factor at the end accounts for the fact that SIP instalments are typically invested at the start of each month.

The invested amount is P × n. The returns are FV − invested. The total is FV. The calculator runs this formula three times — once for each scenario — and highlights the scenario with the highest FV. Mathematically, this is a simple calculation; the value is in seeing all three results next to each other so you can compare the trade-offs.

Three common comparison scenarios

Here are three scenarios that come up frequently among Indian investors, with the actual numbers the calculator produces. Use these as templates — change the inputs to match your own situation.

Higher amount vs longer duration

• Scenario A: ₹10,000 per month for 15 years at 12% → final corpus ≈ ₹50.5 lakh
• Scenario B: ₹15,000 per month for 15 years at 12% → final corpus ≈ ₹75.7 lakh (50% more invested, 50% more corpus)
• Scenario C: ₹10,000 per month for 20 years at 12% → final corpus ≈ ₹99.9 lakh (same monthly as A, but ₹1 crore corpus)

The winner is Scenario C — adding 5 years to the horizon nearly doubles the corpus, despite the same monthly investment. This is the power of compounding: extra years at the end matter far more than extra rupees at the start.

Higher return vs longer duration

A 1% increase in expected return (say 12% to 13%) over 20 years produces roughly the same boost as adding 3–4 years to the tenure. But a 1% higher return is not guaranteed — it requires picking a fund that outperforms, which is hard. A longer tenure is something you control. When in doubt, prioritise time over return.

Step-up vs flat

Compare a flat ₹10,000 SIP for 20 years at 12% (final corpus ≈ ₹1 crore) to a stepped-up SIP starting at ₹7,000 with a 10% annual step-up for 20 years at 12% (final corpus also ≈ ₹1 crore, but starting cashflow is 30% lower). The step-up scenario is easier on your salary in the early years and lets your SIP grow with your income. See our Step-up SIP Calculator to model step-ups in detail.

How to use the comparison to refine your SIP plan

The comparison calculator is most useful when you have a specific decision to make. Start by entering your current SIP as Scenario A — your actual monthly amount, your actual expected return, your actual remaining tenure. Then use Scenarios B and C to model two alternatives you are considering.

For example, suppose you currently invest ₹10,000 per month in a Nifty 50 index fund (assume 11%) for 15 years, and you are considering two changes: (B) increasing the SIP to ₹12,000 per month, or (C) switching to a flexi-cap fund (assume 12%) and keeping the SIP at ₹10,000. Plug in all three and compare. You will typically find that increasing the SIP amount wins, because it is a guaranteed input change — a 1% higher return is an assumption that may or may not materialise.

Once you have picked a winning scenario, use the SIP Goal Calculator to verify it produces the corpus you need. If it falls short, either increase the monthly amount or extend the tenure until the comparison calculator's winning scenario matches your goal calculator's required SIP. To dig deeper into how much you should be investing based on your income, read our guide on best SIP amounts by income. If you are weighing a one-time investment against a recurring SIP, our SIP vs Lump Sum guide covers the trade-offs in detail.

What this calculator does NOT account for

The comparison calculator uses the same assumptions as our regular SIP calculator — and has the same limitations. It does not account for inflation, so all three scenarios are in nominal rupees, not real purchasing power. A ₹1 crore corpus in 20 years will buy roughly what ₹35–40 lakh buys today.

It also does not model taxes. Equity mutual fund gains above ₹1.25 lakh per financial year are taxed at 12.5% LTCG (post-July 2024 Budget). To compare post-tax outcomes, knock 1–2 percentage points off your expected return for each scenario.

Finally, the calculator assumes constant monthly investments and constant returns. In real life, you may step up your SIP, pause it during a job loss, or switch funds mid-way. Treat the comparison as a planning anchor — the relative ranking of scenarios is more reliable than the absolute numbers.

Frequently asked questions about the SIP Comparison Calculator

Mutual fund investments are subject to market risks. Please consult a SEBI-registered investment adviser before investing.