The Rule of 72: How Long Until Your Property Doubles?
Short answer: divide 72 by your annual growth rate to estimate doubling time. At 9% appreciation a property doubles in about eight years; at 12% in six. The shortcut ignores transaction costs, tax and rent, which is where most real-world estimates go wrong.
Doubling at 9% CAGR
8 yrs
Doubling at 12% CAGR
6 yrs
Rate needed to double in 5 yrs
14.4%
Cost the rule ignores
8–10%
What the data says
The rule is accurate within a percentage point for growth rates between 6% and 15%, which covers most property scenarios.
Applying it to gross price ignores stamp duty, brokerage and capital gains, all of which push real doubling further out.
With leverage, equity doubles far faster than the asset does — that is the calculation most investors should actually run.
Rent reinvested shortens the effective doubling period and is omitted entirely from the shortcut.
How EstateVeda executes this
Use the rule for a first-pass sanity check, never as an underwriting output.
Re-run the estimate on equity rather than asset value when a loan is involved.
Add transaction costs and tax to convert the estimate into a realistic net doubling date.
Cross-check against the corridor's actual three-year CAGR rather than an assumed rate.
Risks we underwrite against
Assuming a corridor's recent CAGR persists for a full doubling period is the most common misuse.
The rule flatters high-growth assumptions, which are exactly the ones least likely to hold.
Ignoring holding cost makes an eight-year doubling look better than it is.
EstateVeda verdict
Use the Rule of 72 to sanity-check a pitch in ten seconds. Use a full net-of-cost, net-of-tax model before committing capital.
Frequently asked questions
What is the Rule of 72 in real estate?
A shortcut where 72 divided by the annual growth rate gives the approximate years to double. At 9% appreciation, that is roughly eight years.
Is the Rule of 72 accurate for property?
It approximates gross price growth well but ignores 8–10% transaction costs, capital gains tax, rent and leverage, so the real answer differs in both directions.
What rate doubles money in ten years?
About 7.2%, which is within the range strong Indian residential corridors have delivered before rent is counted.