Sip Calculator
SIP calculators are incredibly useful — but they're tools, not crystal balls. If you've ever wondered "why is my SIP showing different returns than the calculator predicted?", you're not alone. Let's clear this up once and for all.
The Core Truth About SIP Calculators
Every SIP calculator (including ours) uses a fixed assumed return rate (e.g., 12% per year). In reality, markets deliver:
- +45% in bull years (2021, 2023)
- -35% in crash years (2008, 2020 COVID)
- +8% in flat years
The calculator averages this to 12% per year. Over 15–20 years, the actual average tends to come close to this projection — which is why long-term SIPs work. But over 5–7 years, actual results can vary significantly.
7 Common Mistakes Investors Make with SIP Calculators
01
Using 18–20% Return Assumptions
Some investors set 18–20% CAGR, excited by recent bull market performance. This is dangerously optimistic. Use 10–12% for conservative planning. Treat higher returns as a bonus.
02
Ignoring Inflation
₹1 crore in 20 years won't buy what ₹1 crore buys today. At 6% inflation, ₹1 crore in 20 years is worth only ₹31 lakhs in today's purchasing power. Always plan for inflation-adjusted returns (real return = nominal CAGR − inflation rate).
03
Forgetting Exit Load and Expense Ratio
A 1% expense ratio on a 12% CAGR fund effectively gives you 11% net returns. Over 20 years, this 1% difference costs you lakhs. Always choose direct plans over regular plans — they have lower expense ratios.
04
Treating the Projection as a Guarantee
The calculator output is a projection, not a promise. Markets can underperform for extended periods (like Japanese stocks did for 30 years). Always have a buffer in your planning.
05
Not Accounting for Tax
Equity mutual fund gains above ₹1.25 lakh are taxed at 12.5% LTCG (after 1 year). Your actual take-home corpus after tax will be less than what the calculator shows. Factor in 5–8% tax drag on final returns for accurate post-tax planning.
06
Comparing SIPs with Different Fund Categories
A 15% CAGR assumption works for small-cap funds. But using 15% for a large-cap fund SIP is unrealistic. Always use realistic return assumptions for the specific fund category.
07
Not Using Step-Up in Calculations
Most investors set a fixed SIP amount, but their income grows. Not using step-up in the calculator underestimates the final corpus by 50–200%. Add a 10% annual step-up for more realistic long-term projections.
How to Use SIP Calculators Correctly
- Run 3 scenarios: 10% (pessimistic), 12% (base case), 15% (optimistic)
- Plan based on the pessimistic case — any extra return is a bonus
- Account for inflation: Subtract 6% from your return rate to get "real returns"
- Add step-up: A 10% annual step-up is realistic and dramatically improves results
- Review annually: Recalculate every year as your financial situation changes
Calculate Your SIP with Different Scenarios ↓
Our SIP calculator lets you adjust return rates from 1–30% and add step-up. Try 3 different scenarios to plan conservatively.
Open SIP Calculator →Frequently Asked Questions
Are SIP calculators accurate?
SIP calculators are mathematically accurate for the inputs provided. However, since returns are assumed (not actual market returns), the final corpus is a projection, not a guaranteed outcome.
Why is my actual SIP return different from the calculator?
Your actual returns differ because SIP calculators assume a constant return rate (e.g., 12% every year), while real markets fluctuate. Over long periods (15+ years), these average out close to the assumed rate.
What rate should I use in a SIP calculator?
Use 10-12% for conservative planning, 12-15% for moderate growth expectations. Always run multiple scenarios and make decisions based on the conservative estimate.
Does a SIP calculator account for tax?
Standard SIP calculators show pre-tax returns. To estimate post-tax corpus, note that LTCG above ₹1.25 lakh on equity funds is taxed at 12.5%. Deduct approximately 5-8% from the total gain shown by the calculator.