Is zakat obligatory on a sum of money that has been held for a full year and reached its nisab, knowing that 75% of it is allocated for future marriage preparations?

The zakat on savings set aside for marriage expenses must be paid if the amount reaches the nisab and a full lunar year (hawl) has passed, even if it is earmarked for personal matters such as marriage or buying a house. The amount of zakat is one-quarter of one-tenth (2.5%), and it must be paid immediately; it is not permissible to delay it for investment. Although zakat may outwardly appear to decrease wealth, it purifies it, cleanses it, and causes it to grow. It also purifies the one who pays it from sins, as Allah Almighty says: {Take, [O Muhammad], from their wealth a charity by which you purify them and cause them to increase.}