2026-09-22 7 min read

SIP Inflation Calculator

Growth after inflation in real terms for a SIP. Live calculator with worked steps, charts and formulas.

Calculator

Expected Return (p.a.)(%)

Inflation (p.a.)(%)

Current / Maturity Value

This sip calculator compounds monthly (SIP timing) and annually (lump sums) at the assumed return. Returns are assumed, not promised — use a conservative rate for goals.

Results

Optimal

Real Return (Inflation-Adjusted)

5.66%

Nominal Return

12.00%

Inflation

6.00%

Corpus in Today's Money (10y)

$615,519

Live results update as you type — currently showing real return (inflation-adjusted) of 5.66%. Replace the defaults with your own fund figures for an exact comparison.

Visualizations

Nominal vs Real

12%Nominal

5.7%Real

Formula

Fisher linkage: purchasing-power growth after inflation.

Real = (1+nom)/(1+infl) − 1

Variables

Symbol	Name	Unit	Description
nom	Nominal return	percent	Headline
infl	Inflation	percent	CPI assumption

Explanation

Growth after inflation.

Step-by-Step Calculation

Follow each step to understand how the result is calculated from your inputs.

Step 1

Fisher equation strips inflation from nominal.

Real = (1+nom)/(1+infl) − 1

Result: 5.66%

Step 2

Discount the corpus to today’s purchasing power.

Today = Future ÷ (1+infl)^yrs

Result: $615,518.56

Final Answer

5.66%

Worked Examples

See how the calculator works with different scenarios.

Scenario

The sip inflation calculator run on the values above, showing the full calculation path rather than only the answer.

Inputs

Expected Return (p.a.):12

Inflation (p.a.):6

Current / Maturity Value:1102300

Calculation

1. Fisher equation strips inflation from nominal. → 5.66% 2. Discount the corpus to today’s purchasing power. → $615,518.56

Result

Real Return (Inflation-Adjusted): 5.66%

Interpretation

12.00% nominal − 6.00% inflation = 5.66% real. $1,102,300 in 10y buys what $615,519 buys today.

Understanding Your Result

Your Result: Real Return (Inflation-Adjusted): 5.66%

What This Means

Growth after inflation.

Why It Matters

12.00% nominal − 6.00% inflation = 5.66% real. $1,102,300 in 10y buys what $615,519 buys today.

Professional Interpretation

12.00% nominal − 6.00% inflation = 5.66% real. $1,102,300 in 10y buys what $615,519 buys today.

How this is calculated

Fisher linkage: purchasing-power growth after inflation.

What drives the result

A goal corpus discounted at an assumed real return gives the funding need; allocation sets the risk that return is earned with; rebalancing harvests drift back to target; inflation translates nominal corpus into today’s purchasing power.

Recommendations

•Plan goals in today’s money using real returns.
•Equities beat inflation over decades; cash rarely does.

Educational Content

Introduction

Planning turns a goal into a funding schedule: how much monthly, for how long, at what step-up, in what allocation — and how to hold the mix through rebalancing and inflation. This page solves the funding equation rather than just projecting wealth.

Concept Explanation

Applications

▸Sizing the SIP for a home, education or retirement goal

▸Deriving tenure from a fixed SIP budget

▸Setting target weights and rebalance trades across holdings

▸Stress-testing goals in today’s money with inflation

Benefits

•Solves both directions: SIP for goal, tenure for SIP
•Step-up modeling matches contributions to rising income
•Rebalance trades are exact to the rupee
•Inflation mode keeps goals honest in real terms

Limitations

•Assumes constant return, step-up and inflation paths
•Rebalancing ignores tax, loads and transaction frictions
•Goal amounts assumed static; lifestyle inflation ignored unless entered
•Emergency and insurance needs outside the investment ignored

Best Practices

•Plan in real (today’s) money, then add inflation explicitly
•Automate step-ups with salary cycles
•Rebalance yearly or at ±5% bands, preferably with fresh flows
•Recheck tenure after every large market move

Common Misconceptions

Myth: A fixed SIP fits a rising income

Truth: Flat SIPs underuse later earning power — step-ups fund goals years sooner.

Myth: Allocation is set-and-forget

Truth: Drift concentrates risk; rebalancing is the maintenance the plan needs.

Practical Tips

•Demand real returns above 3–4% for long goals.

Common Mistakes

Celebrating nominal doubles

At 6% inflation, a nominal double is only ~40% more purchasing power over 12 years.

Assumptions

This calculator makes the following assumptions to provide estimates:

CPI tracks your basket: Personal inflation differs.

Limitations

Be aware of these limitations when using this calculator:

Limitation: Assumes constant return, step-up and inflation paths

Limitation: Rebalancing ignores tax, loads and transaction frictions

Limitation: Goal amounts assumed static; lifestyle inflation ignored unless entered

Limitation: Emergency and insurance needs outside the investment ignored

Frequently Asked Questions

Answers to common questions about this calculator.

Why plan in real terms?

Goals are spent in future rupees; nominal corpus overstates what they buy.

Who uses the sip inflation calculator?

It is used by investors comparing SIP options, by advisers checking a quote before a client commits, and by planners sizing contributions for a goal. It sits in the SIP group of the ETFs & Mutual Funds section of Atlascalcs.

How accurate is the sip inflation calculator?

Every figure follows directly from the inputs using standard fund mathematics, so it is accurate to the quality of the values you enter. NAV rounding, actual SIP dates and changing expense ratios explain small gaps versus statements.

How current are the returns used here?

The calculator uses the return you enter. Update it to the fund factsheet trailing CAGR/XIRR or your own conservative assumption. Costs and tax slabs follow the conventions in the references.

Does rounding change the results?

Math runs at full precision; display rounds only. AMCs round NAVs to 4 decimals, so expect paise-level differences.

SIP or lump sum — which is better?

Lump sums maximize time invested and win in rising markets; SIPs average cost and enforce discipline. With cash available, staged deployment (STP over 6–12 months) splits the difference.

What should I have ready before investing?

Monthly budget, horizon, expected return grounded in benchmark history, expense ratios, exit-load windows and your tax slab. With those, every figure here ties to a fund document.

Related Calculators

Explore more calculators related to this topic.

Related Guides

Deepen your understanding with these educational resources.

Mutual funds vs ETFs

How costs, tracking and trading style differ.

Understanding expense ratios

Reading the hidden annual cost inside every fund.

Dollar-cost averaging explained

Why fixed monthly contributions beat lump-sum timing for most savers.

Glossary

Technical terms used in mortgage calculations explained in plain language.

Real Return: Nominal return minus inflation effect — growth in purchasing power.

Authoritative References

Trusted sources and standards referenced by this calculator.

SEC — Mutual Funds and ETFs FINRA Fund Analyzer AMFI India — SIP resources Morningstar — Fund methodology Investopedia — IRR/XIRR

Applicable Standards

SIP future value with month-start timing and monthly compoundingCAGR geometric annualization; XIRR solved numerically to full precisionExpense drag as (r − expense) re-projection over the same horizonMoney rounded for display only; all calculations run at full precision

Was This Calculator Helpful?

Report Issue

Page Information

Last Updated:

2026-09-22

Version:

2.0.0

References:

License:

Free to use for educational and professional purposes.