Japan Employees' Pension (Kosei Nenkin) Estimate Calculator
Estimate your Japanese public pension (Employees' Pension + Basic Pension) by entering your average standard remuneration, enrollment months, and claim age. Includes early/late claim adjustment rates.
Early/Late Claim Adjustment Rate by Age
Depending on your claim age, your pension amount ranges from a 24% reduction (age 60) to an 84% increase (age 75). Below are the adjustment rates at representative ages.
| Claim Age | Adjustment Rate |
|---|---|
| Age 60 | -24.0% |
| Age 61 | -19.2% |
| Age 62 | -14.4% |
| Age 63 | -9.6% |
| Age 64 | -4.8% |
| Age 65 | +0.0% |
| Age 66 | +8.4% |
| Age 68 | +25.2% |
| Age 70 | +42.0% |
| Age 72 | +58.8% |
| Age 75 | +84.0% |
What Is This Japanese Pension Estimate Calculator?
This tool lets you estimate your combined Japanese public pension benefit — the Basic Pension (Kokumin Nenkin) plus the earnings-related portion of the Employees' Pension (Kosei Nenkin) — simply by entering your average standard remuneration, Employees' Pension enrollment months, National Pension paid months, and claim age. You can also see how the early/late claim adjustment rate changes across claim ages from 60 to 75.
The Japan Pension Service's official "Nenkin Net" provides an accurate estimate, but it requires logging in with a My Number Card and your actual contribution records. This tool requires no login — anyone can get a rough estimate instantly from the numbers they enter. Note that individual circumstances such as the dependent allowance or in-service pension suspension are not considered, so treat the result as a rough guide only.
How to Use
- Enter your average standard remuneration Enter the monthly average of your standard remuneration, including bonuses, in units of 10,000 yen. If unsure, use annual gross income divided by 12.
- Enter your Employees' Pension enrollment months Enter the total number of months you were enrolled in the Employees' Pension insurance.
- Enter your National Pension paid months Enter the total months of National Pension premiums paid, including your Employees' Pension enrollment period (max 480 months).
- Choose your claim age with the slider Select a claim age between 60 and 75, and the early/late claim adjustment rate updates automatically.
- Check the result See the breakdown of your Basic Pension and Employees' Pension, plus the adjusted estimated pension (monthly and annual).
Tips for getting more out of it
- If you don't know your Employees' Pension enrollment months, check the "Employees' Pension enrollment period" field on your Nenkin Teiki-bin.
- Average standard remuneration is a monthly figure including bonuses. You can back-calculate the exact value from your Nenkin Teiki-bin, but annual gross income divided by 12 gives a usable estimate.
- Include your Employees' Pension enrollment period as-is within your National Pension paid months.
- Moving the claim age slider updates the early/late claim adjustment rate in real time.
- Once chosen, early or late claiming generally cannot be reversed, so treat this estimate as a starting point and consult the Japan Pension Service or a Nenkin consultation center before making a final decision.
Use Cases
Planning an early retirement
See how much your pension is reduced if you claim early at age 60, to help plan your post-retirement finances.
Comparing the benefit of delaying your claim
Estimate how much your pension increases if you delay claiming to age 70 or 75, to decide whether delaying is worthwhile.
Comparing estimates before and after a job change
Compare how your future pension estimate changes when your enrollment period or standard remuneration changes due to a job change.
A starting point for retirement savings planning
Once you know your expected public pension amount, use it as a baseline to decide how much more you need to save through iDeCo, NISA, or other means.
Glossary
- Basic Pension (Kokumin Nenkin)
- A pension paid to all residents based on National Pension premiums paid between ages 20 and 60. Reaches the full amount at 480 paid months (40 years).
- Employees' Pension (Kosei Nenkin)
- A pension paid on top of the Basic Pension, based on Employees' Pension insurance contributions made by company employees and public servants.
- Earnings-related portion
- The part of the Employees' Pension calculated in proportion to your salary/bonus (standard remuneration) and enrollment period while working.
- Standard remuneration
- Your actual salary and bonuses grouped into fixed brackets, used to calculate social insurance premiums and pension amounts.
- Early claim (Kuriage)
- Claiming your pension between ages 60 and 64 instead of 65, in exchange for a 0.4% reduction per month claimed early.
- Late claim (Kurisage)
- Delaying your pension claim to between ages 66 and 75, in exchange for a 0.7% increase per month delayed.
- Dependent allowance (Kagyu Nenkin)
- An additional benefit for those with 20+ years of Employees' Pension enrollment who have a dependent spouse or child (not included in this tool's estimate).
Frequently Asked Questions
Side Note — Why Pension Amounts Are Revised Every Year
Japan's public pension amount isn't a fixed figure set once by law and paid out forever — it's reviewed every fiscal year based on changes in prices and wages. This mechanism, known as price and wage indexation, exists so that the living standards of pensioners don't fall too far behind those of the working generation. The full Basic Pension amount used in this tool (847,300 yen/year) is the FY2026 value, and it will be revised again in future years.
In recent years, an additional adjustment called the "macroeconomic slide" has also been built in to moderate the growth of pension amounts as Japan's population ages and the working-age population shrinks. Even in years when wages and prices rise, only part of that increase is reflected in pension amounts, so that pension levels can be sustained for future generations over the long term.
The early and late claim adjustment rates have also been revised over time. The early-claim reduction rate used to be 0.5% per month, but it was eased to 0.4% under a 2022 reform. The maximum age for late claiming was also raised from 70 to 75, reflecting a broader redesign of the pension system to reward those who continue working longer.