Korean Age Explained: Which Age Goes on Forms, and Can You Buy Alcohol?

Since June 28, 2023, the age on Korean laws, contracts and official documents is your international age, unless a specific law says otherwise. The older Korean age runs one or two years ahead. For visitors, birth year still matters mostly when buying alcohol or tobacco: in 2026, anyone born in 2007 or earlier is outside the youth ban.

What does Korea count as your age now?

Question	Answer
Age on official documents and contracts	Full age (international age), in force since June 28, 2023
Where birth year still decides	Buying alcohol or tobacco under the Youth Protection Act (청소년 보호법)
Who counts as a “youth” in 2026	Anyone born in 2008 or later; born in 2007 or earlier does not count
Who checks your age	The seller must verify the buyer’s age and identity

Checked November 1, 2026 against the current text of each law.

Use the first line for any form, booking or contract. Keep your passport handy for the second.

What are the three ways to count Korean age?

Korea.net describes three. Full age (만 나이) starts at zero and adds a year on each birthday. Year age (연 나이) is this year minus your birth year. Traditional Korean age (세는 나이, also 한국식 나이) calls a baby one at birth and adds a year every January 1.

Born	Full age	Year age	Traditional Korean age
March 20, 2000	26	26	27
December 20, 2000	25	26	27

Ages on November 1, 2026.

Year age only matches full age after your birthday. That is why the second person in the table is a year behind on the full-age count. Use the full-age number on forms. The steps below work for any birthday.

How do you work out your Korean age today?

• Full age: 2026 minus your birth year. Subtract one if your birthday hasn’t come yet this year.
• Year age: 2026 minus your birth year, with no birthday check.
• Traditional Korean age: year age plus one.

In 2027, use 2027 in all three formulas. Year age and Korean age go up on January 1. Full age goes up on your birthday.

Which age do Korean forms and contracts use?

Korea’s Civil Act (민법) now says age is counted in full years, with the day of birth included. The Framework Act on Administration (행정기본법) says the same for government matters, unless another law says otherwise.

So an age on a contract or a government form means full age, even without the word “full”. The Ministry of Government Legislation said at the time that private customs were not being forced to change. Its example was marking the 70th and 80th birthdays by Korean age.

Korea.net reported that the change did not affect financial transactions, citing the Financial Supervisory Service: the related rules already used full age. Insurance is the exception. It keeps its own “insurance age”, which adds a year once more than six months have passed since your birthday.

If a Korean friend gives an age that sounds one or two years high, they may be counting the old way. On paperwork, write your international age.

Can you buy alcohol in Korea at 18 or 19?

At 19, you are outside the Youth Protection Act’s sales ban in 2026. At 18, you are outside it only if you were born in 2007.

The Act defines a “youth” (청소년) as someone under 19, then excludes anyone who has reached January 1 of the year they turn 19. That is why the line follows your birth year.

The same youth definition covers venues. Entertainment bars (유흥주점) and bars with singing (단란주점) must check age and keep youths out. Carry your passport for those doors too.

The Act bars anyone from selling alcohol or tobacco to a youth, including through automated vending devices. It also requires the seller to check the buyer’s age and identity.

Birth year	Full age on Nov 1, 2026	Youth under the Act in 2026?
2008	17 or 18, depending on your birthday	Yes, sales are barred
2007	18 or 19, depending on your birthday	No
2006	19 or 20, depending on your birthday	No

Source: Youth Protection Act, Articles 2 and 28, current text.

A traveler born in December 2007 is 18 in full years on November 1, 2026. They still fall outside the youth definition this year. Check your birth year, not your birthday, and carry your passport.

What changes on January 1?

The youth line moves one year every January 1. In 2027, anyone born in 2009 or later counts as a youth. Born in 2008 or earlier does not.

Take a traveler born December 20, 2008. On January 1, 2027 they are 18 in full years, yet they are outside the ban from that day.

If you travel in late December and again in January, the answer can change between trips. Recheck your birth year against the new calendar year.

Where else is full age not the rule?

Area	Rule	Source
Primary school entry	March 1 of the year after the child turns 6; families may also start the year after the child turns 5 or 7	Elementary and Secondary Education Act, Article 13
Military draft, civil service exams	Korea.net’s June 2023 report said full age does not apply there	Korea.net, June 27, 2023

I couldn’t confirm the current rule for the second row in the law text itself. Visitors rarely meet either row. A family moving to Korea with a young child will meet the first. Ask the school about the year your child can start.

What to read next

Curious about Korean traditional liquor? The K-Sool Grand Festival 2026 guide covers dates (November 13 to 15) and how to get there.

Looking for other things to do this month? See Seoul festivals in November 2026.

Which number would I give?

On any form or contract in Korea, I’d write my international age, because the law reads it that way. I’d treat birth year as the number to check for alcohol, tobacco and bar doors, because the youth rule runs on the calendar year, not your birthday.

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Sources

• Civil Act, Article 158 (민법 제158조), National Law Information Center
• Framework Act on Administration, Article 7-2 (행정기본법 제7조의2)
• Youth Protection Act, Article 2 (청소년 보호법 제2조)
• Youth Protection Act, Article 28 (청소년 보호법 제28조)
• Youth Protection Act, Article 29 (청소년 보호법 제29조)
• Enforcement Decree of the Youth Protection Act, Article 5 (청소년 보호법 시행령 제5조)
• Elementary and Secondary Education Act, Article 13 (초·중등교육법 제13조)
• Korea.net: Koreans to get 1-2 years younger under revised age system (June 27, 2023; finance statement attributed to the Financial Supervisory Service)
• Seoul Metropolitan Government: ‘만 나이’ 시작! 알쏭달쏭 이럴 땐 무슨 나이 쓰나요? (June 27, 2023; source credited to the Ministry of Government Legislation)