South Korea’s 90-Day Rule: Which Rules Apply?

TLDR: South Korea's pet import requirements split entirely on one number: your pet's age on the planned arrival date. Pets under 90 days need only a microchip and a health certificate. Pets 90 days or older also need a current rabies vaccination and a passing titer test. The risk isn't the rule itself, it's a pet crossing the 90-day line between when you start preparing and when you actually travel.

South Korea's import process is simpler than most Asian destinations, but it hinges entirely on one calculation: how old your pet will be on the day it lands, not the day you start planning. Get that date wrong and you can end up preparing for the wrong rule set entirely.

Calculate Age at Arrival, Not at Intake

This is the single most important step, and it's the one most likely to get skipped. Your pet's age is measured against the planned arrival date in South Korea, not today's date and not the date you started gathering documents.

A puppy or kitten that's 85 days old when you begin preparing can easily be 95 days old by the time your pet actually lands, especially once you account for vaccination timing, titer lab turnaround, and flight booking. If that happens mid-case, your pet moves from the simpler rule set into the fuller one, and the fuller one requires steps that take real time to arrange.

Do this calculation first, before anything else, and if your pet is anywhere close to the 90-day line, plan for the stricter rule set from the start rather than assuming the simpler one will still apply by the time you travel.

If Your Pet Is Under 90 Days at Arrival

Your pet needs two things: an ISO 11784/11785-compliant microchip and a health certificate. No rabies vaccination and no titer test are required. Same-day release applies once the microchip is confirmed on arrival.

This is the simpler path, but it's only available if your pet's age at arrival, not at any earlier point, actually falls under 90 days.

If Your Pet Is 90 Days or Older at Arrival

Your pet needs a microchip, a current rabies vaccination, and a rabies-neutralizing antibody titer test result of 0.5 IU/mL or higher. Same-day release only applies when both the microchip and the titer result are confirmed at arrival.

The titer test is the piece that takes planning. It has to be performed by an internationally approved laboratory or the competent authority of the exporting country, and the result is valid for 24 months from the blood collection date, not the vaccination date. If your pet was titered for a previous move and that result is still within its 24-month window, it may still be usable.

Why the Titer Timeline Matters More Than It Looks

If your pet is on the 90-days-or-older track, the titer test is usually what determines your realistic travel date, not the vaccination or the paperwork. Lab turnaround typically runs 3 to 4 weeks, and that clock only starts once the blood is drawn, which itself has to happen after the rabies vaccination.

If the titer can't be completed before shipping, or comes back below 0.5 IU/mL, testing can be done after arrival instead, but your pet is held in quarantine while that happens, at your expense, averaging around 10 days but potentially longer. This is a fallback option, not a routine one, and it's the outcome that a missed age calculation or a late-started titer process usually leads to.

What a Missing Health Certificate Means, Regardless of Age

Whichever rule set applies to your pet, the health certificate itself has no substitute. A missing microchip or an incomplete titer results in quarantine while the issue gets resolved. A missing health certificate is different: your pet is refused entry and may be returned to the USA at your cost, with no quarantine option in between. Age determines which requirements apply; the certificate requirement applies regardless of age.

How PetRelocation Can Help

The single biggest risk on this route isn't a complicated rule, it's a straightforward calculation that gets skipped or done too late. PetRelocation has coordinated South Korea moves for over 20 years and starts every case by confirming exactly which rule set applies before anything else gets scheduled.

Complete Support covers full coordination of your pet's microchip, vaccination, titer testing, and health certificate, built around a confirmed age-at-arrival calculation from day one. Vet Paperwork Support focuses on the health certificate and titer documentation while you handle the rest. Consultation gives you direct access to a coordinator to run the age calculation and confirm which rule set applies before you commit to a timeline.

Get a free quote from PetRelocation and a relocation manager will walk you through your options.

Frequently Asked Questions

How do I know which South Korea rule set applies to my pet?
Calculate your pet's age on the planned arrival date in South Korea, not today's date. Under 90 days at arrival means the simpler rule set; 90 days or older means the fuller rule set with rabies vaccination and titer testing required.

What if my pet turns 90 days old between now and my travel date?
Plan for the fuller rule set from the start if your pet is close to the 90-day line. A pet that's under 90 days now but will be older by arrival needs the rabies vaccination and titer test, not the simplified path.

How long is a rabies titer test valid for South Korea?
24 months from the date of blood collection, not the date of vaccination. A result from a previous move may still be usable if it falls within that window.

What happens if my pet's titer test isn't ready before travel?
Testing can be completed after arrival instead, but your pet is held in quarantine at your expense while that happens, averaging around 10 days but potentially longer. This is a fallback, not a routine plan.

Does the age rule affect the health certificate requirement?
No. Every pet needs the health certificate regardless of age. A missing certificate means refused entry with no quarantine option, separate from the age-based vaccination and titer requirements.