The “4-generation rule” comes from the Mitakshara coparcenary system applied under the Hindu Succession Act, 1956 (as amended in 2005).
Judges and lawyers often explain ancestral property rights using a 4-generation diagram.

4-Generation Coparcenary Rule

In ancestral property, rights by birth exist only up to four generations from the common ancestor.

These generations are:

All four can be coparceners at the same time.

Visual Diagram Used in Courts

All persons in these four levels have birthright in ancestral property.

Example With Shares

Suppose ancestral land = 100 acres

Family:

All four are coparceners.

If partition occurs:

Each gets equal share.

What About the 5th Generation?

Example:

The grandson (5th generation) becomes a coparcener only when his father is alive in the line of coparceners.

The coparcenary cannot extend beyond four generations from the common ancestor at any time.

Important Change After 2005

After the amendment of the Hindu Succession Act:

This was confirmed by the Supreme Court in
Vineeta Sharma v. Rakesh Sharma.

Simple Rule Lawyers Use

👉 Ancestral property rights exist only among living members within four generations from the common ancestor. 

Example: 5 Brothers with Sons and Grandsons

Family structure:

Where:

• B = sons of A

• S = grandsons

• G = great-grandsons

Property = 100 acres ancestral property

Step 1 — Partition at Grandfather Level

Grandfather A has 5 sons (B1–B5).

So property divides into 5 equal shares.

Step 2 — B1 Branch

B1 has one son (S1).

So B1’s 20 acres divide between:

Later S1 has son G1.

Now S1’s 10 acres divide:

Step 3 — B2 Branch

B2 has one son S2.

Step 4 — B3 Branch

B3 has no children.

Step 5 — B4 Branch

B4 has two sons S3 and S4.

20 acres ÷ 3 persons (B4, S3, S4)

Step 6 — B5 Branch

B5 has no children.

Final Distribution Table

Key Court Principle

Partition always happens generation by generation.

First divide among coparceners at that level, then divide within each branch.

Simple Formula Judges Use