SIP Calculator Excel Formula: Calculate SIP Returns in Excel (Free Copy-Paste Formula, 2026)

If you invest in mutual funds through a SIP, you have probably typed your numbers into an online SIP calculator at least once. But online calculators are fine for a quick check — when you want to model scenarios, compare tenures, or see the year-by-year growth, nothing beats your own Excel sheet. The problem is that most people Google "sip calculator excel formula", land on a confusing thread, and give up.

This guide fixes that. You will get the exact SIP formula used by calculators, a step-by-step method to build your own SIP calculator in Excel in under five minutes, a single-cell copy-paste formula, a fully worked ₹10,000/month example with verified numbers, and the five mistakes Indians most commonly make in SIP spreadsheets. And if you would rather skip the spreadsheet entirely, our free SIP calculator tool does the same math in your browser — no download needed.

1. Why Build a SIP Calculator in Excel at All?

Online calculators answer one question at a time. Your own Excel sheet answers a hundred. Want to know what happens if you raise your SIP from ₹10,000 to ₹12,000 in year five? Change one cell. Want to compare 10% vs 12% vs 14% returns side by side? Copy a row. Want a year-by-year breakup for your financial planner or your own peace of mind? Excel does it in seconds.

There is another, less obvious reason: building the formula yourself teaches you how compounding actually works. Once you see that the ₹10,000 you invest in month 1 earns interest for 120 months while the ₹10,000 from month 119 earns interest for just one month, you will never again wonder why "starting early" matters so much. The formula makes compounding concrete.

2. The SIP Formula, Explained Simply

A SIP is just a series of equal monthly deposits. Mathematically, it is the future value of an annuity. Here is the formula that every SIP calculator — online, in apps, and in this article — uses:

M = P × [{(1 + i)^n − 1} / i] × (1 + i)

Where:

• M = maturity value (the final corpus)
• P = monthly investment amount
• i = monthly interest rate (annual expected return ÷ 12, as a decimal)
• n = total number of monthly instalments (years × 12)

The last part, × (1 + i), is what most people miss. It accounts for the fact that a SIP instalment is invested at the beginning of each month, so every deposit earns one extra month of compounding. Leave it out and your answer will be slightly lower than every calculator you compare it with — and you will spend an hour wondering why.

3. Step-by-Step: Build Your Own SIP Calculator in Excel (5 Minutes)

Open a blank sheet and set up your inputs like this:

• Cell B1: monthly investment — type 10000
• Cell B2: expected annual return in percent — type 12
• Cell B3: tenure in years — type 10

Now in cell B4, enter the maturity formula. Note that we divide the annual rate by 1200 (12 months × 100) to convert "12" (a percentage) into a monthly decimal (0.01):

=B1*(((1+B2/1200)^(B3*12)-1)/(B2/1200))*(1+B2/1200)

Press Enter and you should see 2323391 — that is ₹23,23,391, the maturity value of a ₹10,000/month SIP at 12% over 10 years.

Add two helper rows to complete the dashboard:

Total invested:  =B1*B3*12
Gains:           =B4-(B1*B3*12)

That is it — you now own a working SIP calculator. Change any input and every number updates instantly.

The Pro Shortcut: Excel's Built-In FV Function

Excel has a built-in function that does the same calculation with less typing — FV. For the same inputs:

=FV(1%, 120, -10000, 0, 1)

The arguments are: monthly rate, number of periods, payment (negative because it leaves your pocket), present value, and type = 1, which means payment at the beginning of the period — the SIP timing. Set type to 0 and you get the ordinary-annuity answer, which is lower. If you ever use FV for SIPs, remember the 1.

4. Copy-Paste Formula: One Cell, Instant Answer

Do not want the full sheet? Paste this single formula anywhere in Excel for a ₹10,000/month, 12%, 10-year SIP:

=10000*(((1+0.01)^120-1)/0.01)*(1+0.01)

Result: ₹23,23,391. Replace 10000 with your monthly amount, 0.01 with your monthly rate (annual rate ÷ 12 ÷ 100), and 120 with your total number of months.

5. Worked Example: ₹10,000/Month at 12% for 10 Years

Here is the complete calculation with every number shown, so you can sanity-check your sheet:

Notice the shape of compounding: you put in ₹12 lakh and the gains add another ₹11.23 lakh — nearly doubling your money, even though every rupee earns just 12% a year. Now stretch the tenure and the effect explodes:

• ₹5,000/month, 12%, 15 years → invested ₹9,00,000 → maturity ₹25,22,880 (gains ₹16,22,880)
• ₹20,000/month, 10%, 20 years → invested ₹48,00,000 → maturity ₹1,53,13,938 (gains ₹1,05,13,938)

The 20-year example is the real lesson: at 10% returns, time does more than half the work. That is why every serious investor's advice boils down to two words — start early.

6. 5 Mistakes Indians Make in SIP Excel Sheets

Mistake 1: Using 12% as the monthly rate. The most common error. A 12% annual return is a 1% monthly rate. Plug in 12% per month and your sheet will tell you ₹10,000/month becomes crores — a fantasy.

Mistake 2: Forgetting the percent-to-decimal conversion. If you typed "12" in the rate cell, you must divide by 1200 (12 months × 100), not just 12. =B2/12 gives 1.0, which Excel reads as 100% per month. Always double-check the decimal.

Mistake 3: Dropping the × (1 + i) timing factor. A SIP is paid at the start of each month, so each instalment compounds one month more than an end-of-month deposit. Omitting the factor understates the corpus by roughly one month's growth — small, but it breaks your reconciliation with every published calculator.

Mistake 4: Treating the assumed return as a promise. The formula assumes a constant 12% every single month for 10 years. Real markets do not behave that way — returns are lumpy, sometimes negative. The output is an illustration, not a guarantee. Sensible investors run the sheet at 10%, 12%, and 14% and plan around the conservative number.

Mistake 5: Ignoring taxes and step-ups. Equity fund gains above ₹1.25 lakh per financial year attract 12.5% long-term capital gains tax, which your sheet does not model. And most salaried investors raise their SIP every year (a "step-up SIP") — the single formula cannot do that; model it as segments instead (run the formula on each year's amount, then add the results).

7. Excel vs the Free CodeFree SIP Calculator

Honest answer: use both. Build the Excel sheet once to understand the math and run what-if scenarios. Then bookmark our free SIP calculator tool for the everyday stuff — it runs the exact same formula in your browser, works on your phone, and needs no spreadsheet skills. If you share numbers with a spouse, a financial planner, or a friend, the Excel version wins; if you just want the answer in ten seconds, the tool wins.

Frequently Asked Questions

Q: Does the Excel SIP formula give the same answer as online SIP calculators?
A: Yes, as long as the inputs match. Reputable calculators assume beginning-of-month instalments (type = 1 in Excel's FV), which is exactly what the formula above models. If your answer differs, check the monthly-rate conversion and the timing factor first.

Q: Can I calculate a step-up SIP (increasing my SIP every year) in Excel?
A: Yes, but not with one formula call. The cleanest way is the segment method: run the SIP formula separately for each year's monthly amount and its remaining tenure, then add the maturity values. For example, a 10-year SIP stepping up 10% yearly becomes ten one-year calculations added together.

Q: Does the formula account for taxes on mutual fund gains?
A: No. The formula computes the gross maturity value. For equity funds held over a year, long-term capital gains above ₹1.25 lakh per financial year are taxed at 12.5%. Deduct that from your gains for a realistic post-tax picture.

Q: Why doesn't my Excel answer match my fund's actual returns?
A: The formula assumes a smooth, constant return. Real funds zigzag — some years +20%, some years −10%. Your actual result depends on the sequence of returns (called XIRR), not the average. That is also why the assumed-rate caveat in Mistake 4 matters: treat the sheet as a planning illustration.