A ¥1M Hospital Bill in Japan? You Pay About ¥87,000

Quick Answer: Japan's High-Cost Medical Benefit (高額療養費, kōgaku ryōyōhi) caps how much you pay for medical care in a single calendar month. For a typical earner under 70 the cap is about ¥80,100 + 1% of costs over ¥267,000 per month — anything above that is refunded, or never charged if you set it up in advance. Using your My Number card as your health-insurance card applies the cap automatically. Note: the caps are rising from August 2026 (staged, income-tiered).

A big hospital bill in Japan is far less frightening than it looks — because there's a cap on what you actually pay. Yet many foreigners never hear about the High-Cost Medical Benefit, pay the full amount at the counter, and don't realise they can get most of it back (or avoid it entirely). This guide covers your cap, how to claim it, and the change coming in August 2026.

This is educational information, not medical or financial advice. Caps depend on age, income, and household, and are being revised — confirm your situation with your health-insurance provider (健康保険組合 / your municipality) or the MHLW.

What is the High-Cost Medical Benefit (高額療養費)?

If your covered medical costs in one calendar month exceed a set ceiling, the amount above the ceiling is either refunded to you or never charged in the first place. It applies to everyone in Japan's public health insurance — employees' health insurance and National Health Insurance alike — regardless of nationality.

Because Japan's system already covers ~70% of most costs (you pay 30%), this benefit is a second layer of protection on top: a hard ceiling on that 30% share for the month.

How much is your monthly cap?

The cap depends on your age and income. For a typical earner under 70 (roughly ¥3.7M–¥7.7M annual income), the ceiling for a month is:

¥80,100 + 1% of total costs above ¥267,000.

So even if a hospital stay generates a ¥1,000,000 bill, your share for that month lands near ¥87,430, not ¥300,000 — the rest is covered by the benefit. Lower-income households have lower caps (down to around ¥35,400 for residents exempt from resident tax); higher earners have higher ones. The cap is applied per person, per month, with rules for combining costs across a household.

Do you even have to apply?

There are three ways this plays out — and the easiest one is now the default:

  1. My Number card as your health-insurance card (マイナ保険証): if you use it at the hospital/pharmacy, your cap is applied automatically — you simply aren't charged above the ceiling, with no advance paperwork. This is the simplest route.
  2. Limit-Application Certificate (限度額適用認定証): if you don't use a My Number health card, apply to your insurer in advance for this certificate and show it at the counter to cap your payment on the spot.
  3. Pay then claim the refund: if you paid the full amount, file for the High-Cost Medical Benefit with your insurer afterward and the excess is refunded (this can take a couple of months).

One exception: those in the low-income category must still apply in advance for a reduced-copayment certificate even when using a My Number health card.

What's changing in August 2026?

The ceilings are being raised — staged over time:

This revision was postponed once and then resubmitted, so treat any specific new figure as current-and-changing — check your own bracket with your insurer or the MHLW before relying on a number.

How it fits with the medical expense deduction

These two are linked. When you claim the year-end medical expense deduction (医療費控除), you must subtract any High-Cost Medical Benefit you received before applying the ¥100,000 floor — because that money was reimbursed, not spent. Knowing both keeps your tax filing accurate and your worst-case medical exposure low.

How this fits your bigger plan

Knowing your medical cap changes how much emergency cash you actually need — the "what if I get sick in Japan?" fear is smaller than most people assume, which frees more of your budget to invest. For where that fits, see FIRE in Japan: NISA, currency & retirement, and estimate your monthly capacity with the free Japan Salary Tax Calculator.

PlanTogetherFI is for educational planning only. It is not financial, medical, tax, or legal advice. High-Cost Medical Benefit caps depend on your age, income, and household and are being revised — confirm your situation with your health-insurance provider or the MHLW.

Frequently Asked Questions

What is the High-Cost Medical Benefit in Japan?

It's a public-health-insurance protection (高額療養費) that caps how much you pay for medical care in a single calendar month. Anything above your income-based ceiling is refunded, or not charged if you arrange it in advance. It applies to all insured residents regardless of nationality.

What is my monthly cap?

For a typical earner under 70 (about ¥3.7M–¥7.7M income), roughly ¥80,100 + 1% of costs over ¥267,000 per month. Lower earners have lower caps; higher earners higher. It varies by age, income, and household, so confirm your bracket with your insurer.

Do I have to apply in advance?

Not if you use your My Number card as your health-insurance card — the cap is then applied automatically. Otherwise, apply for a Limit-Application Certificate before treatment, or pay the full amount and claim the refund afterward. Low-income households must apply in advance either way.

What's changing in August 2026?

The monthly caps are being raised, staged from August 2026, with income tiers subdivided in August 2027 and a new annual out-of-pocket cap for long-term patients. Because figures are changing, check your current bracket with your insurer or the MHLW.

Does the benefit affect my medical expense deduction?

Yes. Any High-Cost Medical Benefit you received counts as a reimbursement, so subtract it from your total medical spending before applying the ¥100,000 floor when claiming the year-end medical expense deduction.

Sources and further reading

Figures reflect rules current as of 2026 and are being revised from August 2026. Always confirm your own cap and procedure with your health-insurance provider or the MHLW.