The ruling concerning whoever intends Hajjut- Tamattu' then he makes the Talbiyyah for a Mufrid

Question :

What is the ruling on whoever intends to perform Hajj as a Mutamatti' and after the Miqat he changes his mind and declares the Talbiyyah for Hajj as a Mufrid? Does he have to sacrifice an animal?

Answer:

The matter differs. If before his arrival at the Miqat he made intention to perform Hajj as a Mutamatti', and then after arriving at the Miqat he changes his intention and assumes Ihram for Hajj only, there is no harm in that. In that case, he does not have to make a sacrifice. However, if he declared the Talbiyyah for 'Umrah and Hajj together from the Miqat or before the Miqat, then he wanted to make it a Hajj (only), he may not do that. However, there is no harm for him to make it an Umrah. As for making it a Hajj (only), he may not do that. Concerning Al-Qiran, it may not be changed to a Hajj (only), however it may be changed to an 'Umrah, because it is easier for the believer and it is that which the Prophet commanded his Companions to do. So, if the person assumes Ihram for both of them (Hajj and Umrah) from the Miqat, then he wants to make it a Hajj only as a Mufrid, he may not do that. However, he can make it an 'Umrah alone, and that is better for him. Therefore, he performs Tawaf and Sa'y, gets his hair cut and removes his Ihram. Then, he says the Talbiyyah for Hajj after that (on the 8th of Thul-Hijjah) and he becomes a Mutamatti'.

Source:
Ash-Shaykh Ibn Baz
Fatawa Islamiyah, Vol. 4 Pages 106