You can choose when to start receiving your pension, anywhere from age 60 to 75. Claim early and it decreases by 0.4% per month (up to −24%); defer and it increases by 0.7% per month (up to +84%). The answer to "how long must I live to come out ahead?" is, on a face-value basis, age 81 years 11 months if you defer to 70. But the real heart of this question is that on a "take-home" basis after deducting taxes and social insurance premiums, the break-even point shifts 2–3 years later. We organize this neutrally, including the pitfall of the spousal supplementary pension (kakyu nenkin).
① Early claim: −0.4% per month (−24% if you start at 60; for those born on or after April 2, 1962) / Deferral: +0.7% per month (+84% if you start at 75)[Japan Pension Service (in Japanese)].
② The face-value break-even: early claim at 60 → you come out ahead if you die by age 80 years 10 months / defer to 70 → you come out ahead if you live to at least 81 years 11 months / defer to 75 → ahead at 86 years 11 months or older.
③ On a take-home basis, however, the break-even shifts later. The increased pension is subject to income tax, residence tax, National Health Insurance / medical care for the latter-stage elderly, and long-term care insurance premiums, so the effective break-even is typically 2–3 years later.
④ An early claim can never be undone, and it also closes off the path to a disability pension. Because the spousal supplementary pension (about ¥400,000 a year) is not paid while you wait during deferral, the standard move for those with a younger spouse is "receive the employees' pension at 65 and defer only the basic pension."
⑤ At age 65, the average remaining life expectancy is about 19 years for men and about 24 years for women. On average, deferral is advantageous, but it is best understood not as a matter of profit and loss but as "insurance against longevity risk."
Quick reference: rate changes and break-even points
| Start of receipt | Rate change | If you get ¥150,000/month | Face-value break-even (vs. starting at 65) |
|---|---|---|---|
| Age 60 (early claim) | −24% | ¥114,000 | A loss if you live past 80 years 10 months |
| Age 63 (early claim) | −9.6% | ¥136,000 | About 81 years old |
| Age 65 (baseline) | ±0 | ¥150,000 | — |
| Age 68 (deferral) | +25.2% | ¥188,000 | Ahead at about 79 years 11 months or older |
| Age 70 (deferral) | +42% | ¥213,000 | Ahead at 81 years 11 months or older |
| Age 75 (deferral) | +84% | ¥276,000 | Ahead at 86 years 11 months or older |
The increase or decrease lasts for life. Note that the average remaining life expectancy at age 65 is about 19 years for men (84) and about 24 years for women (89), so on the premise of "living to the average," deferring to 70 is in positive territory (see also Is the pension worth it? A profit-and-loss check).
The real break-even is calculated on "take-home"
- The pension is subject to income tax and residence tax as miscellaneous income, and National Health Insurance / medical care for the latter-stage elderly and long-term care insurance premiums also rise in line with the pension amount. Even if deferral increases the face value by 42%, the increase in take-home often stays around 30%, and the break-even typically shifts 2–3 years beyond the face-value figure (around 84–85 for deferral to 70).
- If you cross the threshold for residence-tax exemption (around ¥1.55 million in pension for a single person, etc.), your out-of-pocket costs for medical and long-term care also change in tandem, so "deferring just a little and crossing the exemption line" can be the most disadvantageous band.
- Conversely, deferral while working is a good fit. Since you have wage income while employed, it is easy to wait on the pension, and a design where you receive the increased pension during the income-less period after retirement is reasonable.
Four overlooked pitfalls
- (1) The spousal supplementary pension stops: If a person with a younger spouse defers the employees' pension, the supplementary pension (about ¥400,000 a year, until the spouse turns 65) is not paid while you wait, and it is not increased either. → The standard split technique is "receive the old-age employees' pension from 65, and defer only the old-age basic pension" (the basic and employees' pensions can be deferred separately)[Japan Pension Service (in Japanese)].
- (2) An early claim cannot be undone: The reduction lasts for life. Furthermore, after an early claim you can no longer file for the disability basic pension or make voluntary enrollment in the National Pension, so you lose your safeguards against health risks[Japan Pension Service (in Japanese)].
- (3) The survivors' pension does not increase: The amount added by deferral is not reflected in the calculation of a spouse's survivors' employees' pension (the pre-increase amount is the base). The point that it only works for "your own longevity" is a key design consideration.
- (4) Deemed deferral from five years ago: If, after age 70, you decide "actually I want it as a lump sum," there is also a system (from 2023) that treats you as having applied for deferral five years earlier, allowing you to receive it as a lump sum with the increase included.
Realistic answers by type
Deferral suits you if
- You have working income after 65 / can bridge a few years with savings
- You are healthy and your family tends toward longevity
- Single or dual-income, so the supplementary pension is irrelevant → 75 is within view
- You have a younger spouse → defer only the basic pension
An early claim or receipt at 65 suits you if
- You have health concerns / your current living expenses genuinely fall short (an early claim is a legitimate choice)
- You stay within the residence-tax-exemption line (the exempt-status benefits and reductions are large)
- You want to grow it through investment (there is a way of thinking that receives it and invests via NISA, but compare that calmly against the lifelong, guaranteed increase)
FAQ
If I defer to 70, how long must I live to come out ahead?
On a face-value basis, the break-even is 81 years 11 months. However, on a take-home basis that accounts for the taxes and social insurance premiums on the increased pension, it typically shifts to around 84–85. Judging from the average remaining life expectancy at 65 (84 for men, 89 for women), for an average lifespan deferral is in positive territory.
Should I avoid claiming early?
It cannot be stated categorically. The reduction (up to 24%) lasts for life and closing off the disability-pension path is a big disadvantage, but if your living expenses genuinely fall short or you have health reasons, it is a reasonable choice. Because it cannot be undone, we strongly recommend getting an estimate at a pension office before applying.
I heard deferral is a loss if I have a younger wife.
That is because if you defer the employees' pension, the supplementary pension (about ¥400,000 a year) is not paid while you wait, and it is not increased either. In this case, the standard is to receive the old-age employees' pension from 65 to secure the supplementary pension, and defer only the old-age basic pension.
What happens if I die while waiting during deferral?
The original pension from 65 to the month of death (without the increase) is paid to survivors as an unpaid pension. Also, the amount added by deferral is not reflected in the survivors' employees' pension. The accurate understanding is to accept deferral as "insurance for the case where you live long."
Data sources
- Deferred claim (+0.7%/month, up to 84%, treatment of the supplementary pension): Japan Pension Service — Deferred pension claim (in Japanese)
- Early claim (−0.4%/month, cannot be undone, restrictions on the disability pension, etc.): Japan Pension Service — Early pension claim (in Japanese)
- Average remaining life expectancy: Ministry of Health, Labour and Welfare, Abridged Life Tables
* The break-even and take-home estimates are approximations based on a general model. Actual advantage or disadvantage varies with your pension amount, other income, and the insurance premium rates where you live, so please confirm with a pension office's estimate or Nenkin Net.