Marital relations during احرام is the most severe violation of the احرام state. Scholars unanimously agree that if a حاجی has sexual intercourse before the first tahalul (which occurs on the Day of Sacrifice after stoning Jamrat al-Aqabah, shaving/cutting hair, and either طواف or sacrifice), the consequences are extremely serious. There are three mandatory consequences according to the consensus of the four schools:
First, the حج is invalidated (fasid). However, the حاجی must complete all remaining rites of the حج as if it were valid — they cannot simply stop and go home. Second, the حاجی must perform the حج again the following year to make up for the invalidated one, as the obligation of حج remains unfulfilled. Third, the حاجی must pay a kaffarah, which جمہور علماء کے مطابق is sacrificing a camel. If unable to find or afford a camel, they sacrifice a cow. If unable, they sacrifice seven sheep.
Sheikh Ibn Baz explained that both spouses bear the sin if both were willing participants, and both must make up the حج. The kaffarah is shared between them according to one opinion, while another opinion requires a kaffarah from each. Sheikh Ibn Uthaymeen clarified that if the intercourse occurs after the first tahalul but before طواف al-Ifadah, the حج is not invalidated according to the majority, but the حاجی enters a state of partial احرام, must exit the Haram to re-enter احرام from the nearest boundary, perform طواف al-Ifadah, and sacrifice a sheep. This is a lesser penalty than the pre-tahalul violation. Al-Fawzan noted that ignorance of the ruling does not excuse the violation in this case according to most scholars, given the severity of the prohibition.