2026年確定申告カレンダー
January 1, 2026
Refund filing period begins
Those expecting a tax refund can start filing from this date.
February 16, 2026 (Monday)
Tax filing period begins
The income tax filing period officially begins.
March 16, 2026 (Monday)
Filing deadline & income tax payment due
期限Deadline for submitting tax returns and paying income tax. Late filing may result in additional taxes and penalties.
March 31, 2026 (Tuesday)
Business tax & resident tax filing deadline
期限Deadline for business tax and resident tax filings. Separate filing is generally not required if you filed your income tax return.
April 22, 2026 (Wednesday)
Automatic bank transfer date
For those who selected bank transfer, funds will be debited on this date. Ensure sufficient balance.
期限に関する注意事項
期限を過ぎるとどうなる？
Non-filing penalty: 15-20% of the tax due will be added if you file after the deadline.
Late payment interest: Interest of approximately 7.3-14.6% per year applies to late payments.
Blue return revocation: Consecutive late filings for 2 years may result in loss of blue return status.
期限延長の特例
災害その他やむを得ない理由がある場合は、申請により期限の延長が認められることがあります。詳しくは所轄税務署にお問い合わせください。
e-Taxで早めに申告
e-Taxを使えば24時間いつでも申告可能で、期限直前の混雑を避けられます。青色申告の方は、e-Taxで申告すると65万円の特別控除を受けられます（書面提出は55万円）。
e-Tax公式サイト