Retirement Planning for Women - Why You Need More Savings and How to Close the Pension Gap

Why Women's Retirement Lasts Longer

In Japan's 2023 abridged life tables, average life expectancy for women is 87.14 years against 81.09 for men, a gap of roughly 6 years. Healthy life expectancy, meaning the span lived without limitations in daily activities, is calculated separately from the life tables: the 2022 estimate places women in their mid-70s and men in their early 70s. In other words, women spend more than a decade on average living with some form of health limitation.

This gap between life expectancy and healthy life expectancy is the single biggest reason women need larger retirement savings than men. Living longer means more years of living expenses, medical costs, and potential nursing care. On top of that, women tend to spend longer periods living alone after a spouse dies.

The Gender Pension Gap - Why Women Receive Less

In the annual government overview of employees' pension and national pension operations, the average monthly employees' pension benefit has hovered in the 160,000-yen band for men and the 100,000-yen band for women. What women receive, in short, sits in the 60 percent range of what men receive.

The causes are layered. First, the wage gap: benefits are tied to earnings during working years, so lower pay means a lower pension. Second, shorter working careers: interruptions for childbirth and childcare shorten the years of employees' pension coverage. Third, the high share of non-regular work: years spent in part-time jobs outside employees' pension coverage leave only the national pension (the basic pension), which comes to roughly 70,000 yen a month even at the full amount.

Building a life on the national pension alone means running a household on about 70,000 yen a month, which is unrealistic in practice. Older single-person households often spend somewhere around 150,000 yen a month once rent, utilities, and medical costs are included, and living at that level leaves a shortfall of roughly 80,000 yen every month.

How to Estimate What You Will Need

Required retirement savings can be worked out as (monthly spending - monthly income) x months in retirement + one-time expenses. Let us run through a concrete simulation.

Assume you retire at 65 and live to 87: retirement lasts 22 years, or 264 months. With monthly spending of 150,000 yen and pension income of 100,000 yen, the monthly shortfall is 50,000 yen. At 264 months x 50,000 yen, the bare minimum comes to 13.2 million yen.

Add home repairs (2 to 5 million yen), out-of-pocket costs for hospital stays and surgery, and nursing care expenses (covered below), and a realistic target lands at 20 to 30 million yen. The much-discussed "20 million yen retirement problem" is, for women, closer to a modest estimate.

Using iDeCo - Making the Most of Tax Relief

iDeCo, the defined contribution pension for individuals, carries the strongest tax relief of any vehicle for building retirement savings. Contributions are fully deductible from income, so putting in 23,000 yen a month (276,000 yen a year) takes that entire amount out of your taxable income. For someone earning around 3 million yen a year with an income tax rate of 5 percent, the deduction plus 10 percent residential tax lightens the annual tax burden by roughly 40,000 yen.

Investment gains are untaxed as well, and withdrawals qualify for the retirement income deduction or the public pension deduction. Contributing 23,000 yen a month from age 30 for 35 years at a 3 percent annual return leaves roughly 17 million yen at age 65 (9.66 million yen of principal plus 7.34 million yen of gains).

The catch is that the money is locked up until age 60 as a rule. Set aside separate savings for anything you may need to reach, then treat iDeCo strictly as retirement money. When building your retirement plan, start by checking your projected pension amount through official pension portals.

Using NISA - Flexible Wealth Building

The renewed NISA that began in 2024 allows 3.6 million yen of investment a year (1.2 million yen in the installment allowance plus 2.4 million yen in the growth allowance) and 18 million yen over a lifetime, with gains permanently free of tax. Unlike iDeCo, the money can be withdrawn at any time, and that flexibility is its biggest advantage.

For retirement savings, the standard route is putting 30,000 to 50,000 yen a month into a global equity index fund through the installment allowance. Contributing 30,000 yen a month from age 35 for 30 years at a 4 percent annual return leaves roughly 20.8 million yen at age 65. Understanding the basics of tax-free investment accounts expands your options for wealth building.

iDeCo and NISA can be used together. The efficient strategy is to take the tax relief in iDeCo as far as it goes first, then add installment investing through NISA if there is room in the budget.

Preparing for Nursing Care Costs

Money spent on nursing care divides into two kinds: one-time outlays such as home modifications and care equipment, and monthly out-of-pocket costs that pile up over time. If the monthly burden runs to tens of thousands of yen and continues for several years, budgeting a total somewhere in the 5 million yen range is the safer assumption. Because neither the start of care nor how long it lasts can be predicted, preparing with a range rather than pinning down a single figure is what actually protects you.

Public long-term care insurance holds the out-of-pocket share to 10 percent as a rule (20 to 30 percent for those above certain income levels), yet monthly costs of tens of thousands of yen still arise. Fees at special nursing homes for the elderly run 50,000 to 150,000 yen a month, and private care homes 150,000 to 300,000 yen a month.

As preparation, earmarking 5 to 6 million yen of your retirement savings for nursing care is a realistic step. Private long-term care insurance tends to carry steep premiums, so cover the risk with savings first and look at insurance only if you have room to spare.

Preparation Steps by Decade

In your 20s, start by learning. Register with the official pension portal and check your projected benefits. Open an iDeCo account and begin contributing even a small amount, such as 5,000 yen a month. Your 30s are for accelerating. Raise your iDeCo contributions as far as you can and start investing through NISA as well. If childcare interrupts your career, keep the iDeCo contributions running. Your 40s are for reviewing. Recheck your projected benefits on your annual pension notice and calculate the shortfall. Revisit your asset allocation and rebalance risk against return. Your 50s are for finishing the job. Simulate your post-retirement living costs in concrete terms, and close any gap with extra contributions or trimmed spending. While keeping the savings habit, also map out how you will draw the assets down in retirement.

Summary - Women Especially Need an Early Start

Women live longer than men, receive less pension income, and spend longer in care. Facing that reality squarely and committing to long-term wealth building through iDeCo and NISA is the surest path to a secure retirement. Do not file it away as something for later: starting today, even with 1,000 yen, is what will rescue the version of you who arrives 30 years from now.