The marriage tax credit introduced in 2024 gives each spouse a KRW 500,000 credit (KRW 1 million combined) in the year they register their marriage — a one-time, lifetime credit applied in the tax year of registration. Separately, gifts from parents/grandparents made for marriage or childbirth qualify for the marriage/childbirth gift deduction, adding up to KRW 100 million on top of the basic KRW 50 million gift deduction (this is a gift-tax matter, handled separately from income tax settlement).
A direct income-tax deduction for funeral or moving expenses themselves no longer exists under current law — older references to a combined "marriage, funeral, moving" special deduction have since been replaced by the marriage tax credit described above.
Marriage tax credit requirements
The marriage credit and the marriage gift deduction are separate systems
The marriage tax credit (income tax, KRW 500,000) and the marriage/childbirth gift deduction (gift tax, up to KRW 100 million extra) are entirely different tax categories. If you qualify for both, you can claim them together — worth checking both in the year you register your marriage.