Step Up SIP Calculator: Inflation + INR Devaluation

A Step-Up SIP increases your monthly investment by a fixed percentage each year, helping you keep pace with inflation and income growth.

Investment Parameters

Enter your investment details to calculate the inflation-adjusted returns

Monthly SIP Amount (₹)

Expected Annual Return (%)

Investment Period (Years)

Your monthly SIP will increase by this % each year

Expected Inflation Rate (%)

Annual INR Devaluation vs USD (%)

Hist. long-term avg 3.5–4.5%

Why Most SIP Calculators Lie to You (And This One Doesn't)

I've seen it too often: Investors celebrate a shiny ₹5 crore "future value" from standard calculators, only to find it buys half as much after 15-20 years of 6% inflation. As a Kolkata-based FinTech builder, I created this tool because generic calculators ignore India's real inflation beast—turning big nominal numbers into disappointing purchasing power.

Here, you get side-by-side nominal corpus vs. today's rupees value. Plus step-up SIPs to model salary hikes (like jumping from ₹10k to ₹25k/month as promotions hit). No fluff—just honest planning for retirement, kids' education, or that Park Street flat downpayment. Now with INR devaluation adjustment—see true USD purchasing power eroded by rupee fall (3.5–4.5% avg).

3-Minute Setup for Real Results

Enter monthly SIP (start with your current ₹5k-20k).
Set years (10-25 for most goals).
Pick returns (10-14% for equity MFs; conservative like me? Use 12%).
Inflation: 5-7% baseline for India (I've stress-tested at 8% for WB's rising costs).
Optional step-up: 8-10% yearly to match salary growth.

Hit calculate: See total invested, nominal future value, and today's value. Gap too wide? Tweak till it fits your goal.

My Tested Examples (Kolkata Investor Style)

Basic SIP: ₹10k/month, 20 years, 12% return, 6% inflation. Nominal: ₹75 lakh. Today's value: ₹38 lakh. Shocking, right?
Step-Up Power: Same +10% annual increase. Nominal jumps to ₹2.1 crore. Today's value: ₹1.05 crore—salary growth wins.
Goal Reverse: Need ₹1 crore today's money for retirement? Try ₹12k SIP +8% step-up at 12% return over 18 years.

These are from my own runs promoting this on Reddit finance subs: real inputs from Indian salaried folks like us.

Deval Reality Check: Step-up ₹1.05cr today's rupees @4% deval/20yr = ₹65L global power. Abroad goals? Essential.

Lumpsum + Hybrid: Bonus/PF Scenarios

Pure Lumpsum: ₹5 lakh bonus today, 12% return, 15 years, 6% inflation. Nominal: ₹27 lakh. Today's: ₹14 lakh.
Hybrid Beast: Above + ₹10k SIP (10% step-up). Nominal: ₹1.1 crore. Today's: ₹57 lakh: best of both worlds for early momentum + steady builds.

Toggle modes above; inputs stay simple.

FAQs (Real Questions from My Reddit Promos)

Ideal inflation for India?

5-7% long-term; 6.5% for Kolkata's food/housing spikes. Test ranges.

Equity returns?

12% historical average—underpromise at 11% to stay safe.

Step-up SIP?

Auto-increase like salary (e.g., 10k → 11k → 12.1k). Game-changer.

Short-term OK?

Yes, but inflation bites less (<5 years).

Lumpsum vs SIP?

Lumpsum for idle cash now; hybrid crushes solo plays.

Advice?

Nope, just my tool to sharpen your math. Consult an advisor.

SIP Inflation Formula Explained

Metric	Formula
Real Value	`FV / (1 + inflation rate)^years`
Step-Up SIP	`Monthly × (1 + step-up%)^year`
USD Equivalent	`Nominal FV / (1 + INR deval%)^years`

Quick Example: ₹75L lumpsum → ₹23.4L today's rupees (6% inflation, 20 years: 75L / 1.06^20).

This reveals why standard calculators mislead—they ignore inflation's power. Test scenarios above.

INR Devaluation Adjustment

Equivalent in today's USD = Future Value (Nominal) / (1 + annual deval % / 100)^years

Where deval % = expected INR depreciation vs USD (historical avg 3.5–4.5% p.a.).

This shows what the future rupee corpus would be worth if converted to USD at maturity, expressed in today's rupees.

Example: ₹32.7L nominal @ 4% deval/10yr = ₹22.1L today's USD equivalent.

Inflation-Adjusted Step-Up SIP Calculator