What is Kaffara for having sex during periods?

In case a Muslim couple engages in having sex during the wife’s menses/period, they will have to pay their Kaffara as it is a major sin.

• 4 things Islam declares Haram in Husband/Wife relation

Muslim husband and wife can kiss each other, hold hands, and make love in every possible way, but cannot have sexual intercourse. – Sunan Ibn Majah 644

Sex by mistake

If the husband and wife have sex while the wife forgetfully thought that her periods ended and she had become clean, but she did not, there is no Kaffara for it.

Prophet Muhammad ﷺ said: Verily Allah has pardoned for me my ummah: their mistakes, their forgetfulness, and that which they have been forced to do under duress. – Nawawi Forty – 39

Intentional Sex

Sex between husband and wife while they knew that it is prohibited during her periods requires repentance and Kaffara. The Kaffara for intentional intercourse with the wife during her menses is;

• 1 dinar if it was at the beginning of the period.
• Half dinar if it was at the end of menses.
• 1 Dinar = 4.25 grams of 24 karat gold.
• 1 Kaffara for each instance/couple.