Medical Expense Deduction Calculator

This calculation is strictly an estimate. The actual medical expense deduction and tax refund amount will vary depending on other medical expenses, deductions, actual social insurance costs, and dependent status. For exact figures, please consult your local tax office or a certified tax accountant.

This simulator assumes a salaried employee with no other income sources, taking into account only the employment income deduction, social insurance deduction (assumed at 15% of annual income), and basic deduction (480,000 yen).

The medical expense deduction is calculated as “Medical Expenses Paid − Insurance Reimbursements − 100,000 yen (or 5% of total income if total income is under 2,000,000 yen),” capped at 2,000,000 yen. Insurance reimbursements are calculated as 0 yen here.

The estimated tax refund is calculated by applying the marginal income tax rate (including reconstruction special income tax) and 10% resident tax rate to the deduction amount. The income tax portion is refunded via tax return, and the resident tax portion reduces the tax amount for the following year.

Eligibility for medical expense deduction depends on the treatment content. If you have any questions, please check with our clinic or your local tax office.