SIP Calculator

How to use this calculator

Enter your Monthly Investment amount, the Expected Annual Return (as a percentage), and the Investment Period in years.

The calculator uses the standard SIP future value formula (annuity due, payments at the start of each period) and returns:

• Maturity Amount: total value at the end of the period
• Total Invested: sum of all monthly contributions
• Wealth Gained: the interest/returns earned
• Absolute Return: total gain as a % of contributions

The SIP formula

Where:

• FV = Future value (maturity amount)
• P = Monthly SIP amount
• r = Monthly interest rate (annual rate / 12)
• n = Total months (years × 12)
• The final × (1 + r) term accounts for beginning-of-period payment (annuity due)

The formula assumes:

• Constant monthly contribution
• Constant rate of return
• Beginning-of-period contributions (most SIP programs invest the money immediately)

SIP wealth projection table

How much a monthly SIP grows at different amounts and return rates over 20 years:

Monthly SIP	8% Return	10% Return	12% Return	15% Return
$100	$58,900	$75,900	$97,900	$147,000
$250	$147,400	$189,700	$244,700	$367,600
$500	$294,500	$379,700	$489,400	$735,100
$1,000	$589,000	$759,400	$978,700	$1,470,200
$2,000	$1,178,000	$1,518,700	$1,957,500	$2,940,400

20-year total invested at $500/month = $120,000. At 12% return, the $120,000 in contributions grows to $489,400, more than 4× what you put in.

At 12% returns over 20 years, roughly 75% of the final SIP corpus comes from compound returns, not your contributions. The contribution is the engine; the compounding is the fuel.

Why time in the market matters more than how much you invest

Nothing affects SIP outcomes more than the investment period. Doubling the period doesn’t double the result. It multiplies it by 4-8×.

SIP of $500/month at 12% return:

Period	Total Invested	Maturity Amount	Wealth Gained	Multiplier
5 years	$30,000	$41,000	$11,000	1.4×
10 years	$60,000	$115,000	$55,000	1.9×
15 years	$90,000	$261,000	$171,000	2.9×
20 years	$120,000	$533,000	$413,000	4.4×
25 years	$150,000	$1,076,000	$926,000	7.2×
30 years	$180,000	$2,108,000	$1,928,000	11.7×

Each additional 5 years roughly doubles the final value. The 25th and 30th years alone generate more wealth than the first 20 combined.

When SIP beats a lump sum and when it does not

Lump sum puts all money in at once, earning returns on the full amount from day one. SIP spreads contributions over time, so each installment starts compounding from its entry point.

In a steadily rising market, lump sum outperforms SIP on the same total amount because the full capital earns returns for longer. Research suggests lump sum beats SIP in about 2/3 of historical market periods.

However, SIP wins in:

• Volatile or declining markets (dollar-cost averaging lowers average entry price)
• Situations where the full capital is not available at once (most individual investors)
• Psychologically, smaller regular amounts are easier to maintain than one large commitment

Market Scenario	Lump Sum	SIP	Winner
Steady bull market (10 years)	Higher	Lower	Lump Sum
Volatile, flat market	Lower	Higher	SIP
Market crash in year 1, recovery	Lower	Higher	SIP
Market peak at start	Lower	Higher	SIP

Practical takeaway: If you have a lump sum available, the academically optimal choice is often to invest immediately. But SIP is an excellent strategy for regular income earners; it’s automatic, disciplined, and removes the psychological burden of timing.

How a step-up SIP multiplies your long-term corpus

A step-up (or top-up) SIP automatically increases the monthly contribution by a fixed percentage each year. This models salary growth and prevents inflation from reducing the real value of contributions.

$500/month SIP vs. 10% annual step-up SIP, 20 years, 12% return:

Year	Fixed SIP Monthly	Step-Up SIP Monthly
1	$500	$500
5	$500	$732
10	$500	$1,179
20	$500	$3,055

Metric	Fixed SIP	Step-Up SIP
Total Invested	$120,000	$342,000
Maturity Amount	~$533,000	~$1,450,000

The step-up SIP invests about 2.85× more in contributions but generates 2.72× as much final value. The higher contributions come later, when they compound for fewer years, which makes the step-up surprisingly capital-efficient.

Expected return rates by asset class

The return you enter in the SIP calculator matters enormously. Here is a reference:

Asset Class / Fund Type	Realistic Expected Return
Money market / liquid funds	3–5%
Short-duration bond funds	5–7%
Balanced / hybrid funds	7–9%
Large-cap index funds	10–12%
Diversified equity funds	11–14%
Small/mid-cap equity funds	12–16%
Global equity index (net)	8–10%

These are before inflation and after fund expense ratios. Real returns (inflation-adjusted) are approximately 3–5% lower.

The bottom line

SIP is one of the most effective wealth-building tools available to individual investors because it:

1. Enforces savings discipline automatically
2. Eliminates the need to time the market
3. Builds on compounding over long periods
4. Scales with income via step-up plans

Start with whatever monthly amount you can commit to consistently. Time in the market overwhelms amount invested. Even $100/month for 30 years at a reasonable equity return produces a corpus most people would consider life-changing.