Is it obligatory for a man to cover his wife's Hajj expenses?

Hajj is one of the pillars of Islam. It is obligatory upon men and women alike if they are physically and financially able to perform it.

Allah Almighty says:

"Pilgrimage to the House is a duty owed to God by people who are able to undertake it [Al-'Imran, 97].

A husband and his wife are financially independent of each other; Hajj is obligatory upon whoever of them is financially capable of undertaking it.The husband is not legally obliged to pay for his wife's Hajj and neither is she obliged to pay for his. However, there is no objection if either of them wishes to donate the expenses of Hajj to the other.