💰 SIP + Lump Sum Calculator
Compare investment strategies for better returns
SIP and Lump Sum Calculation: Result Summary
Purpose of the SIP and Lump Sum Calculator
This tool lets you compare two popular investment strategies:
- SIP (Systematic Investment Plan) – investing a fixed amount every month.
- Lump Sum – investing a single large amount upfront.
You can switch between the two modes, adjust parameters, and instantly see the future value, returns, and other key metrics. The calculator also generates a downloadable PDF report.
Input Parameters (Left Panel)
| Parameter | Description | Description |
|---|---|---|
| Monthly Investment (SIP mode) | Amount you invest every month | 0 – ₹5,00,000 (or equivalent in other currencies) |
| Investment Amount (Lump Sum mode) | One‑time upfront investment | 0 – ₹1,00,00,000 (1 crore) |
| Expected Return Rate (p.a.) | Annual rate of return (e.g., 12% for equities) | 0% – 30% (step 0.1%) |
| Time Period | Investment duration in years | 0 – 50 years (step 0.1 years) |
| Currency | INR, USD, EUR, GBP (auto‑detects from browser language) | – |
You can adjust values using sliders or by typing directly into the number fields. All results update in real time.
How the SIP and Lump Sum Calculations Work?
1. SIP Mode (Monthly investments)
The calculator assumes you invest a fixed amount at the beginning of each month.
It uses monthly compounding:
Let:
P= monthly investmentr= annual return rate (e.g., 12% → 0.12)n= total number of yearsmonthlyRate = r / 12
The future value after n years (i.e., after months = n × 12 months) is:
Total = P × [(1 + monthlyRate)^months - 1] / monthlyRate × (1 + monthlyRate)
This is the standard formula for an annuity due (investment at the start of each period).
From this, the calculator derives:
- Invested amount =
P × months - Estimated returns = Total – Invested
- XIRR (annualised return) =
(Total / Invested)^(1/n) – 1(expressed as a percentage) - Growth multiple =
Total / Invested
A year‑by‑year breakdown (yearly value) is stored for the PDF report.
2 Lump Sum Mode
The calculator uses annual compounding:
Let:
A= lump sum amount.r= annual return rate.n= number of years.
Total = A × (1 + r)^n
Then:
- Invested amount =
A - Returns = Total – A
- CAGR (Compound Annual Growth Rate) =
(Total / A)^(1/n) – 1(as a percentage) - Growth multiple =
Total / A
A yearly breakdown is also generated (value at the end of each year).
Note: For Lump Sum, the return rate is applied once per year; for SIP, the monthly rate is derived from the annual rate (r/12). This matches real‑world mutual fund returns.
Outputs (Right Panel)
| Output | Meaning |
|---|---|
| Total Value | Final corpus after the investment period (principal + returns). |
| Invested Amount | Total money you put in (monthly × months for SIP, or lump sum amount). |
| Est. Returns | Total Value – Invested Amount. |
| XIRR (SIP) / CAGR (Lump Sum) | Annualised return. For SIP it’s XIRR because cash flows are irregular (monthly); for lump sum it’s CAGR. |
| Growth Multiple | Total Value ÷ Invested Amount (e.g., 1.87x means the investment grew 1.87 times). |
All amounts are formatted in a human‑readable way (e.g., ₹25.0K, ₹10.0L, ₹1.2Cr) based on the selected currency.
Interactive Features
- Mode toggle – switches between SIP and Lump Sum inputs without refreshing the page.
- Real‑time updates – as you move a slider or type into a number field, all results, the currency formatting, and the internal yearly data refresh instantly.
- Input clamping – values are automatically limited to the allowed ranges (e.g., return rate cannot exceed 30%).
- Currency switcher – changes the symbol and formatting (₹ → $ → € → £). The calculator also auto‑detects your location from
navigator.language(e.g.,en-INdefaults to INR,en-USto USD). - PDF report – a button that generates a detailed two‑page PDF (see below).
PDF Report Content
When you click “Download PDF Report”, the calculator creates a professional PDF containing:
- Header with date, page number, and the PlanMyInvest logo (loaded from a remote URL).
- Investment Summary:
- Investment type (SIP / Lump Sum)
- Monthly or lump sum amount
- Expected return rate and time period
- Total value, invested amount, estimated returns
- XIRR / CAGR and growth multiple
- Yearly Breakdown table:
- Year number
- Value at end of that year
- Yearly growth (increase from previous year)
- Cumulative percentage return
- Footer with calculator attribution.
The PDF is generated entirely in the browser using jsPDF – no server required.
Assumptions & Limitations
- No taxes, fees, or inflation are considered – returns are gross.
- SIP assumes a fixed monthly investment – no step‑ups or pauses.
- Compounding frequency:
- SIP: monthly (realistic for mutual funds).
- Lump sum: annual (simpler; actual daily/monthly compounding would give slightly higher results).
- XIRR for SIP is approximated by the formula
(Total/Invested)^(1/years) – 1. For very short periods or volatile assumptions, this may differ slightly from a true XIRR calculation with exact dates, but it’s accurate for fixed regular investments. - Currency conversion is only visual – the calculator does not perform real‑time forex conversion. It merely changes the symbol and number formatting.
Example Walkthrough
SIP Mode
- Monthly investment: ₹25,000
- Return rate: 12% p.a.
- Time: 10 years
Results
- Invested amount: ₹30,00,000
- Total value: ~₹56,00,000
- Returns: ~₹26,00,000
- XIRR: 12.0%
- Growth multiple: ~1.87x
Lump Sum Mode (same rate & time)
- Investment: ₹10,00,000
- Total value: ~₹31,05,000
- Returns: ~₹21,05,000
- CAGR: 12.0%
- Multiple: ~3.11x
The calculator clearly shows that a lump sum grows much more because the entire amount is invested from day one, while SIP builds up gradually.
Final Takeaway
This SIP + Lump Sum calculator is a simple, interactive tool for comparing two fundamental investment approaches. It helps you answer questions like:
“If I invest ₹10,000 every month for 15 years at 12% returns, how much will I have?”
“Would a one‑time ₹5 lakh investment give me a better final value?”
Because all inputs are adjustable and results update instantly, you can experiment with different rates, timeframes, and amounts to make informed financial decisions.
