Time Value of Money: Why ₹1 Lakh Today Is Worth More Than ₹1 Lakh Tomorrow
₹1 lakh today beats ₹1 lakh in 10 years. Learn how inflation erodes money's worth over time and why the time value of money matters for every financial dec
So you’ve just played around with the numbers above. Maybe you typed in ₹1 lakh and watched it shrink to ₹60,000-something in today’s money over ten years. That feeling — that mild horror — is the time value of money doing its job.
Here’s the core idea: money sitting still is money moving backwards. A rupee today is worth more than a rupee tomorrow, because today’s rupee can work, grow, and beat inflation. Tomorrow’s rupee just… exists.
This isn’t abstract finance theory. It’s the difference between retiring comfortably and realising at 55 that you’ve been running on a treadmill.
The Real Cost of Waiting
Let’s make this concrete. Say you’re 28, earning ₹75,000 a month in Pune, and you’ve decided to start a SIP — a Systematic Investment Plan, which just means investing a fixed amount every month into a mutual fund — of ₹10,000 per month. You start today.
At a 12% annual return (roughly what large-cap equity mutual funds have historically delivered over long periods), after 30 years you’d have approximately ₹3.5 crore.
Now say you wait just five years. You’re 33, same ₹10,000 SIP, same 12% return. You now have 25 years instead of 30. Your corpus: approximately ₹1.9 crore.
Same monthly amount. Same return. Five years of waiting cost you ₹1.6 crore.
That’s not a rounding error. That’s a second home.
Why This Happens: Compounding Is the Engine
The reason the gap is so large comes down to compounding — earning returns not just on your original investment, but on the returns themselves. Albert Einstein may or may not have called it the eighth wonder of the world, but the maths doesn’t care about the attribution.
Here’s a simple illustration. You invest ₹1 lakh in an index fund today at 12% CAGR. CAGR stands for Compound Annual Growth Rate — it’s the steady yearly return that gets you from point A to point B, accounting for the compounding effect.
| Year | Value of ₹1 Lakh |
|---|---|
| Year 1 | ₹1,12,000 |
| Year 5 | ₹1,76,234 |
| Year 10 | ₹3,10,585 |
| Year 20 | ₹9,64,629 |
| Year 30 | ₹29,95,992 |
Your ₹1 lakh becomes nearly ₹30 lakhs in 30 years. You didn’t add a single rupee after the first day. That’s time doing the heavy lifting.
Inflation Is the Other Side of the Same Coin
There’s a second reason ₹1 lakh today is worth more than ₹1 lakh tomorrow — and it’s less cheerful. Inflation. India’s average retail inflation has hovered around 5–6% annually over the past decade.
At 6% inflation, something that costs ₹1 lakh today will cost ₹1,79,085 in ten years. Your money didn’t grow. The price did.
This is why keeping large sums in a savings account — which typically earns 3–3.5% per year at most banks, including SBI and HDFC — is quietly destructive. You’re earning 3.5% while inflation eats 6%. Your real return is negative.
A fixed deposit helps a bit — SBI’s 1–3 year FD rates are currently around 6.8–7% — but after tax (assuming you’re in the 20% or 30% bracket), the real return is thin. Equity, for money you won’t need for 5+ years, is where the time value of money actually works for you instead of against you.
What To Actually Do With This
The action here is straightforward. If you have ₹5,000 to ₹15,000 a month that you’re not doing anything meaningful with, start a SIP in a broad-market index fund — something like the Nifty 50 or Nifty 500 index fund available on Groww or Kuvera — today. Not next month.
The specific fund matters less than the starting date. Getting in at 28 versus 33 is a ₹1.6 crore decision, as shown above. Getting in at 33 versus 38 is a similar gap.
The secondary move: don’t let cash pile up in a savings account beyond your emergency fund — typically 3–6 months of expenses. Park it in a liquid mutual fund or a short-duration debt fund that can beat inflation. You can even use our SIP calculator to pressure-test whether your current savings rate is keeping pace with rising costs.
Time is the one variable you can’t buy back.
Frequently Asked Questions
What is the time value of money in simple terms?
It means that ₹1 lakh in your hand today is worth more than ₹1 lakh promised to you five years from now. Today’s money can be invested and grow; future money hasn’t done anything yet. Inflation also means future money buys less.
How does inflation affect the value of money in India?
At India’s average inflation of around 6%, prices roughly double every 12 years. That means ₹50,000 today will have the purchasing power of approximately ₹25,000 in 2037. Keeping money idle in a low-interest account means you’re losing real value every year.
Is a fixed deposit enough to beat inflation?
Barely, and sometimes not at all. An SBI FD at 7% sounds reasonable, but if you’re in the 30% tax bracket, your post-tax return drops to around 4.9% — which barely keeps pace with 5–6% inflation. For long-term goals, equity mutual funds have historically done significantly better.
When should I start investing — is it too late if I’m in my 30s?
Starting at 30 or 35 is far better than starting at 40 or 45. A ₹10,000/month SIP started at 35 and run for 25 years at 12% still builds roughly ₹1.9 crore. The best time was five years ago. The second best time is now.
What is CAGR and why does it matter?
CAGR is Compound Annual Growth Rate — it’s the single annual percentage that represents how much an investment grew per year, accounting for compounding. If a mutual fund shows a 10-year CAGR of 13%, that means ₹1 lakh invested a decade ago is now worth approximately ₹3.4 lakhs. It’s the most useful number for comparing investments over time.