Think Your NHIS Premium Is Wrong? How to Appeal It in Korea

That bill looks wrong. So what now?

You opened your NHIS (National Health Insurance Service) notice. The monthly premium was much higher than you expected. Maybe you were outside Korea for part of that period. Maybe your employer already covers you, but a separate bill still arrived at home. Maybe your spouse ended up in a different household on paper.

You can challenge it. The National Health Insurance Act gives every subscriber a formal right to object, and that includes foreign residents. D-2 students, E-7 workers, F-6 spouses and F-4 overseas Koreans all have the same right.

But the clock starts early. And people often lose weeks on the wrong route before they find the right one. NHIS health insurance for foreigners

Is your premium actually wrong, or just high?

An objection only works if NHIS used the wrong facts or made an error. Since July 2019, foreigners staying six months or more have been enrolled automatically as regional subscribers. Your premium can’t fall below a set minimum, even if the calculation comes out lower. That floor is a rule, not a mistake. Wrong dates, wrong households and duplicate bills are mistakes.

Regional subscribers (jiyeok gaipja) are people who aren’t covered through a workplace. Their premium is based on income and property. Employee subscribers (jikjang gaipja) share the cost with their employer through payroll.

For foreign regional subscribers, the premium is at least the previous year’s average premium across all subscribers. According to NHIS, you pay this minimum whenever your own calculation comes out lower. You can’t appeal that floor. You can only dispute the facts behind your bill.

These are the errors you can dispute:

• Billed after you left Korea. NHIS uses departure data from the Korea Immigration Service. If your departure or re-entry dates don’t match, the bill won’t either.
• Double billing. You started a job with workplace coverage, but regional bills kept coming for the same months.
• Household errors. You can add a spouse or a child under 19 to your household. If that request wasn’t processed, each person may get a separate bill.
• Old income. Income from a job or business that has already ended is still being counted.
• Missed exclusion. You applied for an exclusion because foreign insurance or an employer contract covers your care in Korea, and it wasn’t applied.

Is there a faster fix than a formal objection? Often, yes. If your income dropped or your family situation changed, NHIS can update the premium through an adjustment request (jojeong sincheong). No committee reviews it. Call NHIS first and ask which route fits your case.

A formal objection, called ijui sincheong (이의신청), is for when NHIS won’t correct the bill or the error has already cost you money.

Once you’ve found a real error, the next question is timing. The deadline is shorter than it looks.

The 90-day clock most people start too late

You must file a written objection within 90 days of learning about the NHIS decision. There is also an outer limit of 180 days from the date the decision was made. If you miss both, your case usually ends there, unless you can show a justifiable reason for the delay. The first review is done by NHIS’s own objection committee.

Article 87 of the National Health Insurance Act sets these limits. The English translation on MOLEG says, in essence:

An objection shall be filed in writing within 90 days from the date on which the person becomes aware of the disposition, and not later than 180 days from the date of the disposition, unless there is a justifiable reason.

In practice, you “become aware” on the day the notice reaches you. Write that date down.

What about NHIS’s response deadline? Under the Act’s Enforcement Decree, NHIS must decide within 60 days of receiving your objection. It can extend that once, by up to 30 days, but it has to tell you.

Here’s the catch. Filing an objection doesn’t pause the bill. The disputed premium is still due while the committee reviews your case.

This matters more for foreigners. NHIS shares arrears data with immigration. Unpaid premiums can shorten the stay period you’re given at your next extension on HiKorea. Arrears can also restrict your insurance benefits at hospitals. So pay first, then get the money back if you win.

What goes into the application? More than a letter.

What NHIS needs to see before it changes your bill

The required documents are the objection form, a copy of your ARC or passport, the premium notice you’re disputing, and evidence that a fact was wrong. The evidence depends on the error. It could be departure records, proof of employment, family documents or income records. Documents in other languages generally need a Korean translation. Without evidence, the committee has nothing to change.

Match each claim to one document:

Add a short written statement. Keep it to one page. It should answer four things:

1. Which notice you’re disputing (date and notice number).
2. Which months are affected.
3. What is factually wrong.
4. What result you’re asking for, such as cancelling or reducing the charge.

Don’t argue that the premium is unfair. Argue that a fact is wrong, and point to the document that proves it.

Once your folder is ready, there are four ways to send it. One saves you a trip, if you can use it.

The fastest way to file (and the catch for newcomers)

You can submit an objection at any NHIS branch office, by mail, by fax, or through the online submission portal on the NHIS website. Online filing requires Korean identity verification, such as a joint certificate or a simple authentication app linked to your ARC. If you don’t have that set up yet, visiting a branch is the practical choice.

Follow these steps:

1. Call first. Dial 1577-1000, or call the foreign language line at 033-811-2000 for English and other languages. Ask what caused the charge and whether an adjustment would fix it.
2. Get the form. Ask for the objection form at a branch, or find it in the civil service section of the NHIS website. The form is in Korean.
3. Write your statement. Use the four points above. Keep it factual.
4. Attach your evidence. One document per claim.
5. Submit and keep proof. Get a receipt at the branch, save the fax confirmation, or use registered mail. That receipt date is your proof that you met the 90-day deadline.
6. Keep paying. Monthly premiums stay due while you wait.

Searching in Korean? The phrase is 이의신청 방법 (how to file an objection). At the counter, saying “ijui sincheong” tells staff exactly what you need.

No Korean digital authentication yet? Setting it up once makes future NHIS, Hometax and Government24 tasks much easier. digital certificate for foreigners in Korea

Then comes the wait. And winning doesn’t always mean you get cash back right away.

What a win actually looks like (and where your refund goes)

If the committee accepts your objection, NHIS recalculates the premium and cancels or reduces the disputed amount. Overpaid premiums are refunded with refund interest under Article 86 of the National Health Insurance Act. But NHIS first uses that money to cover any other unpaid premiums you owe. You have 3 years to claim an overpayment.

The decision letter arrives in Korean, usually by mail. There are three possible outcomes:

• Accepted: the disputed charge is cancelled or corrected in full.
• Partially accepted: some months or amounts are corrected, others stand.
• Rejected: the original bill stands.

Overpaid money is called gwaonapgeum (과오납금). NHIS pays refunds to a Korean bank account registered in your name. If you haven’t registered one, call the NHIS line or visit a branch.

Planning to leave Korea soon? Register or update your refund account before you close your bank account. Under Article 91 of the Act, the right to reclaim overpaid premiums expires after three years. That sounds like plenty of time. It isn’t much once you’re abroad without a Korean account.

Is a partial win worth it? Usually, yes. Even a few corrected months can mean hundreds of thousands of won back, plus refund interest.

And if NHIS says no?

When NHIS says no: two more chances

If NHIS rejects your objection, you can request adjudication from the Health Insurance Dispute Mediation Committee within 90 days of receiving the decision. That committee is part of the Ministry of Health and Welfare, not NHIS. You can also go to court with an administrative lawsuit. Adjudication is free and you don’t need a lawyer, so it’s a sensible next step.

An adjudication request (simpan cheonggu) is covered by Article 88 of the Act. You can submit it through NHIS or send it directly to the committee. The committee’s work is overseen by the Ministry of Health and Welfare.

An administrative lawsuit follows the Administrative Litigation Act. You don’t have to go through adjudication first. But a court case takes longer and usually needs legal help.

Need free advice? The Korea Legal Aid Corporation offers legal consultations at 132. Bring your NHIS decision letter and all the evidence you submitted.

While any of this is pending, keep your stay status clean. Arrears flagged to the Korea Immigration Service can follow you to your next extension appointment. NHIS arrears visa extension

Your checklist before you file

• Write down the date the notice arrived, then count 90 days.
• Call 033-811-2000 and ask if an adjustment request solves it.
• Collect one document per claim, with Korean translations.
• Submit with proof of receipt.
• Keep paying monthly premiums.
• Confirm your refund bank account with NHIS.