The 100-Minus-Age Rule: How Much Risk Should You Take?
At 25, go all-in on equity. At 55, dial it back. This simple rule gives you the right mix at every life stage โ without overthinking.
Key Takeaways (TL;DR)
- Formula for Asset Allocation: (100 - Age) = % in Equity.
- At age 25, invest 75% in Equity. At 60, invest 40%.
- This balances risk and growth across your life stages.
= % of portfolio in Equity
The rest goes to Debt (FD, PPF, Bonds)
๐ What is the 100-Minus-Age Rule?
The 100-Minus-Age Rule is a simple formula to decide how much of your investment portfolio should be in equity (stocks/mutual funds) and how much should be in debt (FDs, PPF, bonds).
The Formula
Age 25 โ 75% Equity, 25% Debt | Age 50 โ 50% Equity, 50% Debt
The logic: When you're young, you have decades to recover from market crashes. So take more risk (equity). As you age and approach retirement, you need stability. So shift towards safety (debt).
๐ Your Allocation at Every Age
| Age | Equity % | Debt % | What This Means |
|---|---|---|---|
| 25 | 75% | 25% | Aggressive growth phase. Mostly equity MFs, small PPF/FD |
| 30 | 70% | 30% | Still growth-heavy. Start building emergency FD |
| 35 | 65% | 35% | Family responsibilities grow. Balance risk |
| 40 | 60% | 40% | Mid-career. Kids' education fund in debt |
| 50 | 50% | 50% | Equal split. Retirement is 10 years away |
| 60 | 40% | 60% | Security first. Monthly income from debt instruments |
๐ Real-Life: Same Market Crash, Two Different Outcomes
In March 2020 (COVID crash), the Nifty fell 38% in one month. Let's see how two people reacted:
๐ฐ Anil, Age 55
Portfolio: 90% Equity (wrong allocation)
Anil panicked, sold everything, and locked in the loss. He retired with 40% less than planned.
๐ Sunita, Age 55
Portfolio: 45% Equity + 55% Debt (correct!)
Sunita stayed calm, didn't sell, and her equity recovered within 18 months. She retired comfortably.
Same age, same corpus. But Anil lost โน30 Lakhs permanently because his allocation was wrong for his age. Asset allocation is your seatbelt.
๐ฎ๐ณ The Indian Update: Use 110 โ Age
Many modern financial advisors suggest using 110 instead of 100, because:
- Indians are living longer (life expectancy has risen from 60 to 72 in 30 years)
- Inflation in India is higher (6-7% vs 2-3% globally), so you need more growth
- There's no government pension for most private-sector workers
With 110 โ Age: A 30-year-old gets 80% equity allocation instead of 70%. More aggressive, but appropriate for the Indian context where you need your money to work harder.
Get your allocation right for your stage of life
Rebalance once a year. If equity outperforms, your 70:30 might become 80:20 automatically. Sell some equity, buy more debt. It's counter-intuitive but it locks in profits.
For the "Debt" part, don't just use FDs. Mix it up: PPF (tax-free), Short-term Debt Funds (better liquidity), and Government Bonds (safest). Diversify even within debt.
Your risk tolerance matters more than your age. If a 10% market drop makes you lose sleep, use (90 โ Age) instead. A rule that you can stick to is better than a perfect rule you abandon in panic.
๐ฏ Action Steps
- Calculate: 100 (or 110) โ Your Age = Your ideal equity %
- List all your current investments. Categorize each as Equity or Debt.
- Calculate your current equity:debt ratio.
- If it's off by more than 10%, start redirecting new SIPs to fix the ratio.
๐งฎ Try These Calculators
Put the concepts from this article into practice with our free tools.