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Check with the embassy for passport validity rules.

Not a strict legal mandate on paper, but airlines and immigration officers at the border commonly expect a return or onward ticket showing departure before the permitted stay ends

You should have No fixed amount is officially published, and this is rarely and lightly enforced in practice, but immigration officers may occasionally ask for evidence of sufficient funds and accommodation.

Every visitor must complete one of two separate online steps before arrival depending on their own nationality, either a K-ETA before departure, or, for nationalities currently, temporarily exempt from K-ETA through 31 December 2026, South Korea's own e-Arrival Card instead, mandatory since 1 January 2026 with the paper version discontinued; which one applies to a given nationality is stated on that country's own visa_rules row

Check with the embassy for overstay penalties.Overstay penalties escalate with the length of the overstay rather than one flat daily rate, from a warning for a very short first time overstay up to a fine as high as KRW 30,000,000 for longer or repeated violations. Deportation is possible for longer overstays or additional offenses, with re-entry barred for 5 to 10 years depending on severity, and any fine must be paid before departure

Declare cash above USD 10,000 (or equivalent) combined across all foreign currency and monetary instruments carried; KRW 8,000,000 for Korean won specifically, confirmed against Korea Customs regulations.

Difficult to obtain and not routinely granted for an ordinary visa-free tourist stay; handled case by case at a local Immigration Service office, applied for well before the current permitted stay expires

The commonly cited recommendation of 6 months of passport validity beyond arrival is a practical safety margin many airlines and travelers still follow, not an official South Korean government requirement. Separately, the Jeju Province Visa Waiver Program allows holders of ordinary passports from nearly every nationality, an opt-out list of roughly 22 excluded nationalities rather than a short opt-in list, to stay without a visa for 30 days within Jeju Province specifically, not the rest of South Korea, provided they hold a valid K-ETA and arrive on a direct international flight landing at Jeju International Airport

Always confirm with the official embassy or consulate before you fly.