What is a SIP Calculator and How Does It Work?
A SIP (Systematic Investment Plan) calculator computes the future value of regular monthly investments in a mutual fund over time, assuming a given annual return rate. It uses the Future Value of an Annuity formula:
FV = P × [(1 + r)^n – 1] / r × (1 + r)
Where P is the monthly SIP amount, r is the monthly return rate (annual rate ÷ 12), and n is the total number of months. For example: ₹10,000/month for 15 years at 12% per annum grows to approximately ₹50.2 lakh — with only ₹18 lakh invested. The remaining ₹32 lakh is pure compounding gain.
How Much SIP Do You Need for ₹1 Crore?
This is the most common question from Indian investors. The answer depends on your time horizon and expected return:
| Time Horizon | At 10% p.a. | At 12% p.a. | At 15% p.a. |
|---|
| 10 years | ₹48,900/mo | ₹43,500/mo | ₹36,100/mo |
| 15 years | ₹24,800/mo | ₹20,000/mo | ₹15,300/mo |
| 20 years | ₹13,500/mo | ₹10,100/mo | ₹6,900/mo |
| 25 years | ₹7,500/mo | ₹5,300/mo | ₹3,300/mo |
The longer your horizon, the dramatically lower the required SIP — this is the power of compounding. Starting early is far more impactful than investing more later.
What is Step-up SIP (Top-up SIP)?
A step-up SIP increases your monthly investment by a fixed percentage every year — usually 10%, aligned with typical salary increments. Instead of investing ₹10,000 flat every month for 15 years, you start at ₹10,000 and increase by 10% each year (Year 2: ₹11,000, Year 3: ₹12,100, and so on).
The results are dramatic. On a 15-year SIP at 12% returns:
| SIP Type | Starting SIP | Total Invested | Final Corpus |
|---|
| Flat SIP | ₹10,000/mo | ₹18,00,000 | ₹50,20,000 |
| 10% Step-up | ₹10,000/mo | ₹38,40,000 | ₹1,00,30,000 |
| 15% Step-up | ₹10,000/mo | ₹62,60,000 | ₹1,73,50,000 |
A 10% annual step-up roughly doubles your final corpus. Most AMCs (Axis, HDFC, SBI, Mirae Asset, etc.) support step-up SIP instructions at the folio level.
Mutual Fund Capital Gains Tax — Union Budget 2025-26 Rules
Union Budget 2025-26 changed the tax rates on mutual fund gains. Here is the complete updated picture:
| Fund Type | Holding Period | Tax Type | Tax Rate | Exemption |
|---|
| Equity / Equity Hybrid (≥65%) | > 1 year | LTCG | 12.5% + 4% cess | ₹1.25 lakh/FY |
| Equity / Equity Hybrid (≥65%) | ≤ 1 year | STCG | 20% + 4% cess | None |
| Debt MF (purchased after Apr 1, 2023) | Any | Slab rate | Your income tax slab + 4% cess | None |
| Gold / International / FoF | Varies | Slab rate | Your income tax slab + 4% cess | None |
Key change from Union Budget 2025-26: LTCG rate for equity increased from 10% to 12.5%, STCG from 15% to 20%. The LTCG exemption increased from ₹1 lakh to ₹1.25 lakh per financial year.
LTCG Tax Harvesting Strategy — Save ₹15,600 Per Year
Since the first ₹1.25 lakh of equity LTCG is completely tax-free every financial year, you can deliberately book gains up to this limit and immediately reinvest — resetting your cost basis with zero tax. This is called LTCG harvesting.
Example: You hold a fund with ₹80,000 of unrealised LTCG. Redeem partially to book ₹1.25 lakh of LTCG in March — tax = ₹0. Immediately reinvest. Your new cost basis is higher, so future tax liability is lower. Repeat every year. Over 10 years, this strategy can save ₹1–2 lakh in taxes for a typical investor.
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Frequently Asked Questions
How is SIP return calculated in India?
SIP returns use the Future Value of Annuity formula: FV = P × [(1+r)^n – 1] / r × (1+r), where P = monthly SIP, r = monthly rate (annual ÷ 12), n = months. The annualised return (XIRR) accounts for the timing of each instalment.
What return rate should I assume for my SIP calculator?
For long-term planning (10+ years), use 10–12% for large cap / index funds, 12–14% for flexi cap / multi cap, and 12–15% for mid cap. Never assume more than 15% — it leads to under-saving. Historical NIFTY 50 SIP XIRR (15 years) has been around 12–13%.
Is SIP better than lump sum?
For salaried investors, SIP is almost always the right choice. It removes the need to time the market and averages your cost through rupee-cost averaging. Lump sum can outperform in a steadily rising bull market, but most investors don't have large sums available and can't time entry accurately.
How much SIP do I need for ₹1 crore in 15 years?
At 12% annual returns: approximately ₹20,000/month. At 10%: ₹24,800/month. At 15%: ₹15,300/month. Use the Goal SIP Calculator above for your exact number.
What is the LTCG tax on equity mutual funds in India?
After Union Budget 2025-26: 12.5% on gains above ₹1.25 lakh per financial year, plus 4% health & education cess. Short-term gains (under 1 year) are taxed at 20% + 4% cess. The ₹1.25 lakh exemption applies to your total equity LTCG across all investments in a financial year.
Is debt mutual fund still tax efficient after 2023?
No. The Finance Act 2023 removed the LTCG + indexation benefit for debt mutual funds purchased after April 1, 2023. All gains are now taxed at your income tax slab rate + 4% cess, regardless of holding period. For investors in the 30% slab, this makes debt MFs less tax-efficient than bank FDs which also attract slab-rate tax.
⚠️ Not Investment Advice: BullWiser is not a SEBI-registered investment adviser. All calculations are educational projections based on assumed constant returns. Actual returns vary. Consult a SEBI-registered financial advisor before investing. Tax calculations are indicative only — consult a CA or tax advisor before filing your ITR. Full Disclaimer →