Under the Hindu Adoptions and Maintenance Act, 1956, a person who is himself a dependant:

Section 22(4): "no person who is himself or herself a dependant shall be liable to contribute to the maintenance of others" if the value of his share is, or would become on contributing, "less than what would be awarded to him or her by way of maintenance". A dependant-heir with a larger share contributes in proportion to its value like any other heir.