📊 100 Minus Age Rule Calculator

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Formula at a glance

100 Minus Age Rule formula: Equity % = 100 − Age; Debt % = Age
How the 100 minus age rule works: Equity % = 100 − Age

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📘 About the 100 Minus Age Rule

The 100-minus-age rule is a simple guide to asset allocation. Subtract your age from 100 to get the percentage to hold in equities, and keep the rest in bonds and other safe debt.

As you get older, the equity share falls automatically, reducing risk when you have less time to recover from a market fall.

🧮 Formula

Equity
Equity % = 100 − Age
Debt
Debt % = Age

Where

  • Age = your current age in years
Some planners use 110 or 120 instead of 100 because people now live longer.

✏️ Worked examples

35-year-old investor

You enter
Your Age35 yrs
You get
Equity (stocks, equity funds)65%
Debt (FD, PPF, bonds, debt funds)35%
Aggressive version (110 − age)75% equity
Very aggressive (120 − age)85% equity
On ₹10 lakh₹6.5 lakh equity · ₹3.5 lakh debt

Equity 65%, debt 35%.

Try this example →

55-year-old investor

You enter
Your Age55 yrs
You get
Equity (stocks, equity funds)45%
Debt (FD, PPF, bonds, debt funds)55%
Aggressive version (110 − age)55% equity
Very aggressive (120 − age)65% equity
On ₹10 lakh₹4.5 lakh equity · ₹5.5 lakh debt

Equity 45%, debt 55%.

Try this example →

🧭 How to use this calculator

What you enter

  • Your Age (yrs)

What you get

  • Suggested Equity Allocation
  • Suggested Bond/Debt Allocation

❓ Frequently asked questions

Is this advice?

No. It is a rule of thumb. Your goals, risk tolerance and income matter more.

Should I rebalance?

Yes. Review once a year and bring your holdings back to your target split.

Why keep debt at all?

Debt steadies your portfolio and gives you money to draw on when equities fall.

Is 100 minus age still valid?

With longer lives and low FD returns, many planners now suggest 110 or 120 minus age for equity. The calculator shows all three.

What people are saying
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