Is it too late to start investing in your 40s? Before you think, 'I wish I had started sooner'
Is it too late to start investing in your 40s? Before you think, ‘I wish I had started sooner’
I wish I had started sooner.
When you see news about stock prices. When you hear someone from your generation casually mention, ‘I’ve been doing monthly investments for years now.’ You might feel a little uneasy in your chest. I remember that feeling myself.
Since my lifestyle changed and I started making financial decisions on my own, I’ve been looking at the numbers in my bank book much more seriously than before. Will my savings be enough? But investing is scary. And before I knew it, I was in my 40s. Is there any point in starting now, I wonder.
Today, I’d like to unpack that feeling of ‘is it too late’ together, using numbers and systems. I’ll say this upfront: this is not a story about how your money will definitely grow if you start. This is a point I want to repeat as many times as necessary.
Who are you comparing yourself to when you feel it’s ‘too late’?
When you feel it’s too late, you are usually comparing yourself to two people in your mind. One is someone who has been investing since their 20s or 30s. The other is a version of yourself from another life who thinks, ‘If only I had started back then.’
Neither of these is something I can change now. I cannot go back in time and start monthly investments. Thinking about it that way, it feels a bit harsh, but I realize I might be feeling down by comparing myself to someone I can’t possibly compare with.
Another thing is that behind the word ‘too late,’ I think there is often a lack of clarity about ‘what the money is for.’ Is it for living expenses in old age, for medical or emergency expenses, or just vague anxiety? If you feel it’s ‘too late’ while using someone else’s yardstick without a clear purpose, you are more likely to feel unnecessarily anxious.
So, how much time do you have left? For example, if someone in their early 40s invests until they are 65, they have over 20 years. There is also the idea of continuing to manage money even after 65, as you won’t spend it all at once. Don’t you have more time for investing than you think?
There is certainly a difference compared to those who started early
However, I don’t think it’s right to just sugarcoat things, so let’s look at the numbers.
Let’s assume you invest 30,000 yen every month and continue until you are 65. This is a simulation assuming a 3% annual return (calculated with monthly compound interest, excluding fees and taxes).
・25 years from age 40: Principal 9 million yen → Estimated approx. 13.38 million yen ・20 years from age 45: Principal 7.2 million yen → Estimated approx. 9.85 million yen ・15 years from age 50: Principal 5.4 million yen → Estimated approx. 6.81 million yen
If the starting age is different, the simulation results will differ. This is a fact. The longer you can continue, the larger your principal and the potential for growth will be.
However, these numbers are just simulations. 3% per year is a hypothetical figure, and actual investment performance will fluctuate year by year, and it may fall below the principal you invested. If the yield is 0%, it remains the principal; if it is negative, it decreases. Even if there were good years in the past, they do not guarantee the future.
Even so, what I want you to see is that the figure for 20 years starting from age 45 is not ‘zero.’ Even if you can’t catch up to those who started early, you can build up your savings little by little within your own circumstances. Instead of worrying about whether you can catch up, look at what your money is likely to become. I feel it’s easier on the mind to look at it that way.
Your 40s is also an age where it’s okay to be cautious
There are surely various reasons why you cannot start with the same mindset as a young person. Education expenses, home loans, caring for parents, and your own retirement. Your 40s is a time when you have many things to protect and many things to consider.
That is precisely why I feel that being impatient is a bit dangerous. The stronger the feeling of wanting to ‘make up for lost time’ becomes, the easier it is to want to invest unreasonable amounts or focus on assets with high price volatility. Compared to when you were younger, you have less time to recover if things do not go well. I believe being cautious is not about being timid, but about being appropriate for your situation.
Three common misconceptions
When I first started researching systems and mechanisms, there were a few misunderstandings that I myself almost stumbled over.
One is starting with a large amount to make up for lost time. If you cut into your living expenses to invest, your life itself will become difficult in years when prices drop. It is ultimately more sustainable to decide based on ‘how much can I afford to continue’.
The second is the assumption that if you start NISA, your money will grow. NISA is a ‘container’ system where taxes on profits from investments are exempted, and whether it grows depends on the products you put inside. There is a possibility of losing your principal even with NISA. For reference, the basics of the system are as follows (as of October 2026, based on Financial Services Agency materials).
・The annual investment limit is 1.2 million yen for the installment investment quota and 2.4 million yen for the growth investment quota ・The lifetime tax-exempt principal limit (tax-exempt holding limit) is 18 million yen (of which up to 12 million yen can be for the growth investment quota) ・There is no time limit on how long you can hold assets tax-free
Since the system may be revised, please check the latest official information before actually starting.
The third is thinking, ‘I will wait until I have saved a lump sum.’ The amount needed varies from person to person, and a good thing about installment investing is that you can start with a small amount. However, this assumes that you keep money for sudden expenses separate from your investments. I would like to write about this more carefully in another article.
When do people stop continuing?
I feel that continuing is likely more difficult than starting. If you know the situations where you are likely to stumble in advance, you can prepare yourself a little.
When you no longer have room in your living expenses. When you see news of price drops and get scared. When you feel like you are the only one left behind by stories of others ‘making money.’ All of these may look like emotional issues, but in reality, they can often be prevented by your initial design. Keep the amount reasonable. Decide in advance what you will do when prices drop.
Honestly, this is a part I still struggle with even now. Even if you understand it in your head, I think your feelings will waver when the numbers actually move. Therefore, prepare with the assumption that you will waver. That is more realistic.
Things you can check today
To those who have read this far and thought, ‘So, what should I do first?’ There are a few things you can do before buying anything.
Take a look at your monthly income and expenditure just once. Roughly calculate how many months of living expenses your current savings cover. The way to do it is not difficult; just add up your expenses for the last few months (rent or loan, food, utilities, insurance, etc.) and divide your current savings by that average. For example, if your living expenses are 200,000 yen per month and you have 1.2 million yen in savings, that is 6 months’ worth. This is just an example for calculation, not your actual numbers. (It is sometimes said that it is safe to have 6 months to a year’s worth of money for sudden expenses, but the way of thinking varies depending on job stability and family situation.) Then, try opening the NISA page of the Financial Services Agency once. It is okay if you do not understand the terms.
At first, my head felt heavy just looking at the terminology. Installment, growth, tax-exempt holding limit. Even though they are the same Japanese words, they felt distant. Still, as I researched little by little, ‘I don’t understand’ changed to ‘This is what I don’t understand.’ Vague anxiety becomes much easier to handle just by seeing its outline.
You do not have to decide, and you do not have to buy anything today. Just take one step toward knowing what is happening with your money right now. Try replacing the time you spend worrying about ‘whether it is too late’ with a little time spent ‘knowing.’ I feel that even just doing that will make the restlessness in your chest quieter than before.
※This article provides general information and does not recommend the purchase of specific products or investment. The details of the system are as of October 2026 and are subject to change. Please check the official website of the Financial Services Agency or similar sources for the latest information. Investments carry the risk of principal loss.
(Kohaku🍡)