"Retirement Allowance Tax Checker" Released for Free by Retirement Allowance Navi ── Instantly Calculate Take-Home Pay by Entering Retirement Allowance Amount and Years of Service
Mycat Inc. has released the "Retirement Allowance Tax Checker" for free on its AI retirement allowance and iDeCo receipt optimization simulator "Retirement Allowance Navi." This tool automatically calculates the retirement income deduction amount and take-home pay by simply entering the retirement allowance amount and years of service. It explains the deduction mechanism with diagrams and can simulate the tax difference between lump-sum and installment receipts. This aims to eliminate the information gap regarding retirement allowances.
📋 Article Processing Timeline
- 📰 Published: April 7, 2026 at 01:00
- 🔍 Collected: April 6, 2026 at 16:30
- 🤖 AI Analyzed: April 16, 2026 at 01:19 (224h 49m after Collected)
Mycat Inc. (Headquarters: Meguro-ku, Tokyo) has newly released the Retirement Allowance Tax Checker (https://taisyoku.xyz/tools/tax-saving-checker) on its AI retirement allowance and iDeCo receipt optimization simulator "Retirement Allowance Navi" (https://taisyoku.xyz).
Are you accurately grasping your retirement allowance take-home pay?
Retirement allowance is subject to separate taxation as "retirement income," and the retirement income deduction system reduces the tax burden compared to general employment income. According to the National Tax Agency's regulations, for less than 20 years of service, the deduction amount is "400,000 yen x years of service," and for more than 20 years, it is "8,000,000 yen + 700,000 yen x (years of service - 20 years)."
However, many people do not correctly understand this deduction mechanism. There have been cases where people planned their lives based only on the face value of their retirement allowance, but their take-home pay after deducting taxes and social insurance premiums was less than expected. In particular, the deduction calculation when receiving iDeCo lump-sum payments and retirement allowance in the same year is complex, and the take-home pay may differ depending on the timing of receipt.
Three Features of the "Retirement Allowance Tax Checker"
Instantly calculate with just the retirement allowance amount and years of service: Automatically calculates retirement income deduction amount, taxable amount, income tax, resident tax, and take-home pay by simply entering two items.
Explains the deduction mechanism with diagrams: Shows how the retirement income deduction is applied step by step. The calculation process is transparent, allowing for納得 (understanding and acceptance).
Comparison of receipt patterns: Simulates the tax difference between lump-sum and installment receipts. Also displays precautions when used in conjunction with iDeCo lump-sum payments.
How to Use
Access the Retirement Allowance Tax Checker (https://taisyoku.xyz/tools/tax-saving-checker).
Enter the retirement allowance amount and years of service.
Check the calculation results for tax amount, deduction amount, and take-home pay, and the explanation of the deduction mechanism.
Future Developments
Retirement Allowance Navi will continue to develop and release practical tools that support the optimization of receipt methods, aiming to eliminate the information gap regarding retirement allowance and pension receipts.
Company Profile
Company Name: Mycat Inc.
Location: 2-7-22 Mita, Meguro-ku, Tokyo
Business: Planning, development, and operation of AI-powered lifestyle and business support services.
Corporate Website: https://mycat.business
Keywords: Retirement allowance, Retirement income deduction, Take-home pay, Years of service, iDeCo
Are you accurately grasping your retirement allowance take-home pay?
Retirement allowance is subject to separate taxation as "retirement income," and the retirement income deduction system reduces the tax burden compared to general employment income. According to the National Tax Agency's regulations, for less than 20 years of service, the deduction amount is "400,000 yen x years of service," and for more than 20 years, it is "8,000,000 yen + 700,000 yen x (years of service - 20 years)."
However, many people do not correctly understand this deduction mechanism. There have been cases where people planned their lives based only on the face value of their retirement allowance, but their take-home pay after deducting taxes and social insurance premiums was less than expected. In particular, the deduction calculation when receiving iDeCo lump-sum payments and retirement allowance in the same year is complex, and the take-home pay may differ depending on the timing of receipt.
Three Features of the "Retirement Allowance Tax Checker"
Instantly calculate with just the retirement allowance amount and years of service: Automatically calculates retirement income deduction amount, taxable amount, income tax, resident tax, and take-home pay by simply entering two items.
Explains the deduction mechanism with diagrams: Shows how the retirement income deduction is applied step by step. The calculation process is transparent, allowing for納得 (understanding and acceptance).
Comparison of receipt patterns: Simulates the tax difference between lump-sum and installment receipts. Also displays precautions when used in conjunction with iDeCo lump-sum payments.
How to Use
Access the Retirement Allowance Tax Checker (https://taisyoku.xyz/tools/tax-saving-checker).
Enter the retirement allowance amount and years of service.
Check the calculation results for tax amount, deduction amount, and take-home pay, and the explanation of the deduction mechanism.
Future Developments
Retirement Allowance Navi will continue to develop and release practical tools that support the optimization of receipt methods, aiming to eliminate the information gap regarding retirement allowance and pension receipts.
Company Profile
Company Name: Mycat Inc.
Location: 2-7-22 Mita, Meguro-ku, Tokyo
Business: Planning, development, and operation of AI-powered lifestyle and business support services.
Corporate Website: https://mycat.business
Keywords: Retirement allowance, Retirement income deduction, Take-home pay, Years of service, iDeCo