【summary】
What percentage of take-home income should be set aside for the new NISA?
In conclusion, beginners should spend around 5% of their take-home pay, people with stable household finances should spend around 10%, and even people with a lot of leeway should be careful if they spend more than 15% to 20% of their take-home pay.
However, this is just a guideline. For households with housing loans, education costs, scholarship repayments, nursing care costs, car maintenance costs, and the risk of changing jobs, the amount of savings that can be reasonably expected will vary even if the take-home pay is the same.
| Savings rate relative to take-home pay | Example of monthly savings amount (take-home pay: 300,000 yen) | Suitable people |
|---|---|---|
| 5% | 15,000 yen | People who want to get used to investing first |
| 10% | 30,000 yen | People who want to balance household finances and asset building |
| 15% | 45,000 yen | People who want to seriously build funds for retirement |
| 20% | 60,000 yen | People who have a large amount of funds for living and low fixed costs |
The new NISA is a convenient system, but it does not guarantee the principal. Investment trusts and stocks will fall in value. The amount to be saved should be decided based not only on the possibility that it will increase in the future, but also on whether it can be continued even if the amount decreases.
This article does not recommend specific products or savings amounts. The appropriate amount will vary depending on taxation, investment targets, household budget, workplace system, mortgage, education expenses, and nursing care expenses.
Why is it less likely to fail if you think in terms of “percentage of take-home pay”?
When thinking about the savings amount for a new NISA, many people think in terms of amounts, such as 10,000 yen per month, 30,000 yen per month, 50,000 yen per month, and 100,000 yen per month.
Of course, that's still not bad.
However, even with the same amount of 50,000 yen a month, the burden is completely different for someone with a take-home pay of 200,000 yen and someone with a take-home pay of 500,000 yen.
If your take-home pay is 200,000 yen and your monthly income is 50,000 yen, it is 25% of your income. I'm pretty aggressive.
If you take home 500,000 yen and earn 50,000 yen a month, it is 10% of your income. This is a level that can be easily maintained depending on the household budget.
Therefore, you need to look at the reserve amount not only in terms of amount, but also as a percentage of your take-home pay.
If you decide that ``50,000 yen a month is the correct answer'' or ``100,000 yen a month is the ideal'' without looking at this, your living expenses will become difficult and you will be more likely to be forced to sell when the market price drops.
New NISA frame as of June 2, 2026
First, let's check the system limits.
Under the new NISA system announced by the Financial Services Agency as of June 2, 2026, the accumulation investment limit is 1.2 million yen per year and the growth investment limit is 2.4 million yen per year. If you combine both, you can invest up to 3.6 million yen per year.
The lifetime tax-free holding limit is 18 million yen, of which the growth investment limit is up to 12 million yen.
| Classification | Annual investment limit | Main position |
|---|---|---|
| Fresh investment limit | 1.2 million yen | For long-term, savings, and diversified investment |
| Growth investment limit | 2.4 million yen | Also includes listed stocks and investment trusts |
| Total | 3.6 million yen | Two slots can be used together |
However, there is a difference between the amount you can legally use and the amount you are allowed to invest.
Although the tax-free allowance is attractive, there is no need to invest money for living expenses, an emergency fund, or the near future.
Also, even if you incur a loss in your NISA account, it cannot be combined with the profit or loss in your taxable account. It is important to understand not only the tax-exemption benefits, but also how to handle a decline.
Estimated savings amount by take-home pay
The savings amount when looking at 5%, 10%, 15%, and 20% for each take-home income is as follows.
| Monthly take home pay | 5% | 10% | 15% | 20% |
|---|---|---|---|---|
| 200,000 yen | 10,000 yen | 20,000 yen | 30,000 yen | 40,000 yen |
| 250,000 yen | 12,500 yen | 25,000 yen | 37,500 yen | 50,000 yen |
| 300,000 yen | 15,000 yen | 30,000 yen | 45,000 yen | 60,000 yen |
| 400,000 yen | 20,000 yen | 40,000 yen | 60,000 yen | 80,000 yen |
| 500,000 yen | 25,000 yen | 50,000 yen | 75,000 yen | 100,000 yen |
If you are a beginner, it is easier to think about 5% to 10%.
If your take-home pay is 300,000 yen, it will be 15,000 yen to 30,000 yen per month. This way, you can easily see changes in your household finances while getting used to investing.
15% or more is for people who have a considerable amount of household budget. At 20%, it is likely to be a burden unless you are a single-person household with low fixed costs, a household where one partner works and one of them can save or invest their income, or a person who has sufficient funds to protect their living.
3 wallets to look at before deciding on savings amount
Before deciding on the amount to save for the new NISA, divide your household finances into three categories.
| Wallet | Contents | Can I send it to NISA? |
|---|---|---|
| Wallet for living expenses | Rent, food expenses, communication expenses, insurance premiums, education expenses | Do not turn around |
| Wallet in the near future | Taxes, vehicle inspection, moving, travel, entrance fees | Don't turn around the basics |
| Long-term fund wallet | Surplus funds that will not be used for 10 years or more | NISA candidates |
This division makes it easier to see which money you can invest in.
The new NISA is compatible with long-term investment. Conversely, it is not compatible with money that you plan to use in a few months or a year.
It is dangerous to put money into investments that you will use in the near future thinking, ``If you keep it in a bank deposit, it won't grow.'' If you need it when the market price is down, you will have to sell it at a loss.
If you don't have a life defense fund, reduce the reserve amount.
If you don't have a life defense fund, increasing the reserve amount is the opposite.
As a rule of thumb, it is better to set aside half a year to one year's worth of living expenses in cash and then increase your NISA savings to keep your household finances from collapsing.
Of course, this is not to say that you should not invest until you have completely saved up from the beginning.
However, if you don't have a lot of money to protect yourself, it is more realistic to start with 10,000 yen a month or 5% of your take-home pay.
The most painful thing about investing is when the market goes down and you need money and are forced to sell even though you don't want to. By simply avoiding this, you can significantly reduce your chances of making long-term investment mistakes.
Thoughts by household type
Single people with low fixed costs
If your fixed costs are low and your monthly surplus is stable, it's easy to consider 10% to 15% of your take-home pay.
If your take-home pay is 300,000 yen, it will be around 30,000 yen to 45,000 yen per month.
However, if you are about to have a major expense such as changing jobs, moving, acquiring qualifications, preparing to become independent, etc., it may be better to accumulate cash rather than investing.
Households with children
For households with children, it is best not to decide based solely on the percentage of take-home pay.
Education costs fluctuate greatly over time. When childcare fees, lessons, cram schools, entrance exams, entrance fees, and university fees all add up, the amount of money you can afford to spend on the same take-home pay decreases all at once.
In this case, start by looking at 5% to 10% of your take-home pay. I would like to have a design that does not mix education funds and retirement funds, including how to handle bonuses and child allowances.
People with mortgages
People with mortgages also look at rising interest rates, repair costs, property taxes, fire insurance, management costs, and reserve funds for repairs.
If you decide that you can afford it just by looking at your monthly repayments, you may find yourself in trouble a few years later.
If you are borrowing at a variable interest rate or considering early repayment, it is more realistic to have a large amount of cash on hand before increasing your NISA savings.
People in their 50s or older who are nearing retirement
After your 50s, consider not only the amount of savings, but also the timing of withdrawal.
If you have money that you won't use for 10 years or more, it's easy to consider investing it in a NISA, but it's risky to invest money mainly in stocks that will be used within a few years, such as retirement savings, home repair costs, and nursing care costs for your parents.
At this age, it is necessary to consider not only the percentage of take-home pay, but also cash, bonds, investment trusts, retirement allowances, and pension prospects.
Signs that you can increase your amount
Once the following conditions are met, you can consider whether to increase the amount of savings.
| Sign | Things to check |
|---|---|
| Has been in the black for more than 6 months | Is there surplus from regular income rather than extraordinary income |
| Do you have a life insurance fund | Do you have cash for six months to one year's worth of living expenses? |
| Can you see your big spending plans? Are you excluding education expenses, cars, moving, and home repairs? | |
| Didn't sell when the market was down | Were you able to continue saving money even with unrealized losses |
| Understand the product details | Can you explain what you are investing in |
It's better to increase the amount after looking at your family's financial performance rather than doing it based on your mood.
After trying it for six months to a year, I still have plenty of time. Therefore, increase the amount by 10,000 yen per month. This simple way of proceeding is sufficient.
Signs you should reduce your amount
On the other hand, if you are in the following situations, consider lowering your savings amount.
| Sign | Reason |
|---|---|
| Credit card balance is increasing | Spending management comes first rather than investment |
| Withdrawal of livelihood defense funds | Investment amount may not match household budget |
| I can't sleep because I'm worried about the market falling | Possibility of exceeding my risk tolerance |
| Making up the deficit with bonuses | Monthly savings amount may be too high |
| Planning to cover near future expenses with investments | The timing of need and investment period do not match |
Lowering your reserve amount is not a loss.
It may be much better to reduce the amount according to your household budget and continue investing than to force yourself to stop altogether.
FAQ
What percentage of your take home pay is correct?
There is no correct answer that is common to everyone. If you're a beginner, it's around 5%, and if you're on a stable household budget, it's around 10%, so it's not unreasonable. 15% or more is the level you want to make a decision after checking fixed expenses and livelihood defense funds.
If I want to save 50,000 yen a month, how much do I need to take home?
If you think about it at 10% of your take-home pay, a guideline for saving 50,000 yen a month is a take-home pay of 500,000 yen. If your take-home pay is 250,000 yen and your monthly income is 50,000 yen, the rate is 20%. Some people may be able to do so if fixed costs are low, but it will put more pressure on household budgets.
Which should be prioritized, the life defense fund or NISA?
If you don't have enough cash to cover sudden expenses, you will often prioritize living defense funds. NISA is not a principal guarantee, so it does not always increase when you need it.
Can I change the reserve amount every year?
You can change it. Income, family structure, housing costs, education costs, nursing care costs, and market environment will change. Rather, it is more natural to review your household budget and savings amount once a year.
summary
If you look at the savings amount of the new NISA not only in terms of amount but also as a percentage of your take-home pay, you will be less likely to fail.
Beginners pay around 5% of their take-home pay.
Around 10% of people have stable household finances.
If you want to seriously build up your retirement funds, it should be around 15%.
If it exceeds 20%, it is a level at which you will want to carefully check fixed costs, livelihood defense funds, and near-future expenditures.
The new NISA is not a system that fills the tax-exempt quota as quickly as possible. This is a system that allows you to continue investing for a long time while protecting your household finances.
Can you continue it before increasing it? If you look at this, your asset formation will be less likely to collapse as a result.
source
This article was created based on the Financial Services Agency's NISA system information available as of June 2, 2026. As the conditions of the system and eligible products may change, please check the latest information from the Financial Services Agency and financial institutions before opening an account or purchasing a product.
- Financial Services Agency “Know NISA”
- [Financial Services Agency NISA special website “Basics of asset formation”] (https://www.fsa.go.jp/policy/nisa2/knowledge/basic/index.html)