Welfare comes before either parent's claim
Indian courts decide custody and guardianship on what is in the welfare of the child, a standard that weighs stability, schooling, emotional bonds, and, where the child is old enough, the child's own wishes, rather than treating custody as something owed to one parent over the other. A parent's income, residence abroad or immigration status are relevant factors but not decisive ones by themselves; a court will look closely at what daily life would actually look like for the child under each proposed arrangement.
Taking a child abroad
Where one parent wants to relocate permanently with a child, or has already done so, the court examines whether the move genuinely serves the child's welfare or whether it is really an attempt to distance the child from the other parent. A parent considering relocation should expect to justify it with concrete plans for schooling, housing and continued contact with the parent left behind, and should assume the other side, and the court, will test those plans closely.
India and international child abduction
A point that surprises many NRI parents deserves to be stated plainly: India is not a party to the Hague Convention on the Civil Aspects of International Child Abduction. In countries that are party to it, a child wrongfully removed to another member country can usually be ordered returned through a comparatively quick, standardised process. Because India has not signed the Convention, that fast route does not apply to India, in either direction. A parent whose child has been brought to India, or taken from India, without consent will usually need to pursue custody or habeas corpus proceedings on the ordinary welfare standard, which takes longer and depends more heavily on the facts of the individual case.
Mirror orders and staying enforceable
Because there is no automatic mechanism, families sometimes seek what is informally called a mirror order: matching custody and access orders obtained separately in India and in the country where the other parent or child is based, each recognising and reflecting the other. This reduces, though it does not eliminate, the risk that one parent will simply act as though only the order in their own country exists. Building this kind of arrangement takes coordination with a lawyer in the other jurisdiction, and is best done proactively rather than after a dispute has already flared up.