2026 (Reiwa 8) Nencho Software released (supports year-end adjustments conducted on or after December 1, 2026)Software for making year-end adjustment forms on a phone or PC is now out
On October 1, 2026 (Reiwa 8), the NTA released the 2026 version of its software for preparing year-end adjustment deduction declarations (Nencho Software). The page states that it supports the 2026 year-end adjustment conducted on or after December 1, 2026. Smartphone versions are available from app stores, and PC versions from the page.
Key points
- The 2026 Nencho Software supports the 2026 year-end adjustment conducted on or after December 1, 2026
- Windows version is Ver.7.0.1 (about 24.73MB) and Macintosh version is Ver.7.0.0 (about 11.56MB); both were updated on October 1, 2026
- Smartphone and Windows users can get it by searching "年末調整 国税庁" (year-end adjustment, NTA) in the App Store, Google Play Store or Microsoft Store
- For PCs that cannot get it from a store, a method of obtaining it from the page as a ZIP file is also described
- A certificate installer and related files for cases where installation fails normally on Windows (updated October 1, 2026) are also provided
What to do in practice
- Ahead of year-end adjustments on or after December 1, check how to obtain the software on the devices you will use (PCs, smartphones)
- Prepare guidance for employees (such as steps for submitting deduction certificate data)
The forms you hand in to your company for the year-end adjustment can also be made with the NTA's free software. This year's version came out on October 1. You can use it for year-end adjustments done on or after December 1, and you can get it for a phone or a PC.
- 1. SearchSearch the app store for "年末調整 国税庁"
- 2. InstallFor PCs that cannot get it from a store, use the NTA's page
- 3. UseUsable for year-end adjustments on or after December 1
Points
- On a phone, search the app store for "年末調整 国税庁" and you will find it
- On a PC, download it from the NTA's page
- You can use it for this year's year-end adjustment done on or after December 1
What the words mean
- Year-end adjustment
- Re-calculating, at the end of the year, the tax on all the pay you got from your company during the year
- National Tax Agency (NTA): NTA: Software for preparing year-end adjustment deduction declarations (Nencho Software)
This article summarizes and explains materials published by government agencies and is not advice on any individual case. Rules can change, so for actual procedures and decisions always check the latest original materials and consult professionals such as tax accountants or labor and social security attorneys. English, Simplified Chinese and Traditional Chinese versions are translations prepared from the Japanese articles for convenience. If anything differs, the Japanese text and the original source take precedence.