New NISA Calculator (2024)
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What is New NISA Calculator (2024)?
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Imagine if the government told you, "Hey, any money you make from investing is yours to keep, completely tax-free!" In Japan, that is exactly what the New NISA (Nippon Individual Savings Account) does. Launched in January 2024, this supercharged savings program is designed to help regular people build real wealth. Usually, when you invest in stocks or mutual funds in Japan, the taxman takes a hefty 20.315% cut of your profits and dividends. With NISA, that tax drops to a beautiful 0%. Think of NISA as a special, tax-sheltered bucket for your money. Inside this bucket, you have two compartments: the "Tsumitate" (accruing) side for hands-off, monthly index fund investing, and the "Growth" side for picking individual stocks or exchange-traded funds (ETFs). You can put up to ¥3.6 million into your NISA bucket every single year, up to a lifetime total of ¥18 million. It’s like having a permanent coupon that saves you a fifth of your investment earnings for the rest of your life! This calculator is your friendly roadmap to navigating these rules. Whether you are trying to figure out how many years it will take to hit your lifetime limit, how much tax you will save compared to a regular account, or what happens to your limit when you sell some shares to buy a new car, we’ve got you covered. It turns complicated tax codes into simple, everyday decisions so you can focus on watching your money grow.
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Формула
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Annual Limit = Tsumitate Portion (Max ¥1.2M) + Growth Portion (Max ¥2.4M) = ¥3.6M per year; Lifetime Limit = ¥18M total (Growth Portion capped at ¥12M); Tax Saved = Investment Profits × 20.315%; Restored Lifetime Space = Original Purchase Price (Acquisition Cost) of sold investments (restores the following calendar year)Variable Legend
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| Symbol | Ime | Јединица | Опис |
|---|---|---|---|
| TsumitateLimit | ¥1.2 Million | — | The annual cap for your automatic, monthly savings bucket, set at a maximum of ¥1.2 million per year. |
| GrowthLimit | ¥2.4 Million | — | The annual cap for buying individual stocks, ETFs, or active funds, set at a maximum of ¥2.4 million per year. |
| AnnualTotal | ¥3.6 Million | — | The absolute maximum you can invest across both NISA buckets in a single calendar year, which is ¥3.6 million. |
| LifetimeLimit | ¥18 Million | — | The ultimate lifetime limit of ¥18 million that you can hold inside your tax-free NISA account at any one time. |
| TaxRate | 20.315% | — | Japan's standard investment tax rate of 20.315% that you successfully avoid by using your NISA account. |
| RestoredSpace | Acquisition Cost | — | The amount of lifetime contribution limit you get back in the next calendar year after you sell an investment, calculated using what you originally paid for it. |
How to New NISA Calculator (2024)
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- 1Pick a broker (online brokers like SBI or Rakuten are super popular and cheap!) and open your tax-free NISA account.
- 2Decide how much you want to tuck away each month. You can split this between steady, automatic index funds (Tsumitate) and active investments like stocks (Growth).
- 3Keep your annual contributions under ¥3.6 million total (¥1.2 million max for Tsumitate and ¥2.4 million max for Growth).
- 4Watch your lifetime contribution space, making sure your total original purchase costs don't cross the ¥18 million mark.
- 5Enjoy 100% tax-free dividends and capital gains—no 20.315% tax bite taken out of your hard-earned profits!
- 6Need cash? Sell some investments. The original amount you paid for them will get added back to your lifetime limit the very next year.
- 7Keep investing year after year with peace of mind, because the new NISA rules are permanent and have no expiration date.
Worked Examples
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You will hit your ¥18M lifetime cap in exactly 5 years.
If you max out both sides, you'll hit your ¥18M lifetime limit in exactly 5 years. Once your account is fully loaded at ¥18M, a modest 5% annual return yields ¥900,000 in gains. In a regular taxable account, the government would take ¥182,835 of that. With NISA, all ¥900,000 stays in your pocket!
Compound interest does the heavy lifting over 30 years.
By quietly saving ¥50,000 every month into a globally diversified index fund, you reach your ¥18M cap in 30 years. Thanks to compound interest, your money grows to a whopping ¥41.6 million! Best of all, you save nearly ¥4.8 million in taxes that you would have otherwise owed upon selling.
Restoration is based on original purchase cost, not the selling price.
You made a sweet ¥1,000,000 profit on your investment, which is completely tax-free! When NISA calculates your restored lifetime space for the next year, it looks at the acquisition cost (the ¥2M you originally paid), not the selling price. So, your lifetime limit gains ¥2M of fresh room.
Tax-free compounding gets more powerful the longer you wait.
Putting ¥5M into NISA and letting it compound at 5% for 20 years turns into over ¥13.2M. In a taxable account, because taxes drag down your compounding growth year after year, you'd end up with about ¥1.67M less. That's the power of tax-free compounding!
Real-World Applications
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Mapping out how many years it will take you to reach the ¥18M lifetime limit based on your current monthly budget.
Comparing how much extra retirement cash you'll have by using NISA instead of a standard taxable brokerage account.
Deciding how to split your savings between steady index funds (Tsumitate) and fun individual stock picks (Growth).
Calculating how much tax-free passive income your portfolio can generate once you hit your target milestone.
Planning when to sell assets for big life events (like a house down payment) and seeing when your contribution space will reload.
Special Cases
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What happened to the old Junior NISA?
If you set up a Junior NISA for your kids before it ended in 2023, don't worry! Those funds can remain tax-free until your child turns 18. However, you can't add new money to those old accounts anymore. When they turn 18, they can open their own shiny new 2024 NISA account to keep the wealth-building momentum going.
Can I roll over unused annual limits?
Unlike some countries where unused contribution limits roll over to the next year, Japan's NISA is a 'use it or lose it' deal for the annual ¥3.6M limit. If you only invest ¥1M this year, you can't invest ¥6.2M next year. However, your lifetime limit of ¥18M remains unaffected, so you can still fill that up at your own pace!
Dealing with US stock dividends inside NISA
If you love buying US stocks or ETFs (like SPY) in your Growth portion, keep in mind that NISA only waives Japan's 20.315% tax. The US government will still deduct a 10% withholding tax on dividends before they reach your account. Because NISA is tax-free in Japan, you also cannot claim a Foreign Tax Credit to get that 10% back.
Can I have multiple NISA accounts?
You can only hold one active NISA account at any given time. If you want to switch from a bank to an online broker (which we highly recommend for lower fees!), you have to request a transfer. This involves getting a tax certificate from your current provider and submitting it to the new one, usually done between October and December.
New NISA 2024 Quick Reference
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| Feature | Tsumitate Portion (積立投資枠) | Growth Portion (成長投資枠) |
|---|---|---|
| Annual Investment Limit | ¥1,200,000 | ¥2,400,000 |
| Lifetime Cap | ¥18M combined total | ¥12M maximum within the ¥18M limit |
| What You Can Buy | Only approved, low-cost index funds & ETFs | Stocks, ETFs, REITs, and general mutual funds |
| Tax on Profits & Dividends | 0% (Completely Tax-Free) | 0% (Completely Tax-Free) |
| Selling & Reusing Space | Yes, original cost restored the next year | Yes, original cost restored the next year |
| Account Expiration | None (Permanent tax-free status) | None (Permanent tax-free status) |
Frequently Asked Questions
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What is the new NISA allowance for 2024?
Starting in 2024, the Japanese government gave NISA a massive upgrade. You can now invest up to ¥3.6 million per year, split between ¥1.2 million in the Tsumitate (accumulation) portion and ¥2.4 million in the Growth portion. Your lifetime tax-free investment limit is a generous ¥18 million.
How should I use the new NISA strategically?
For a stress-free approach, prioritize the Tsumitate portion with a low-cost global stock index fund that automatically buys shares every month. If you have extra cash or want to try stock picking, use the Growth portion for individual stocks or ETFs. This blend of safe, steady compounding and targeted growth gives you the best of both worlds.
What are the key differences between the old NISA and the new NISA?
The old NISA had strict time limits (5 or 20 years) and much lower annual limits. The new 2024 NISA is permanent, meaning you can hold investments tax-free forever. Plus, the new system lets you reuse your lifetime limit after you sell, which was impossible under the old rules.
How does the new NISA system impact tax implications for investors?
It's a game-changer because Japan's standard 20.315% investment tax is completely waived. If you make ¥1,000,000 in investment profits in a regular account, you only keep about ¥796,850. In a NISA account, you keep all ¥1,000,000. That extra 20% makes a massive difference over time.
Can I transfer my existing NISA account to the new NISA system?
Your old NISA accounts (from 2023 and earlier) are kept separate and will continue to run tax-free under their original terms. You don't need to manually move them. Your new 2024 NISA account is opened automatically at your current broker, giving you a fresh start with the new rules.
Common Mistakes to Avoid
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- !Trying to invest more than ¥3.6M in a single year. The system won't let you, and trying to force it can lead to frustrating administrative headaches with your broker.
- !Hoping to offset losses. If you lose money on a stock inside NISA, you cannot use that loss to reduce the taxes you owe on gains in a regular, taxable brokerage account.
- !Leaving your NISA cash sitting idle. NISA is a tax wrapper, not an investment itself. If you just deposit cash and don't buy funds or stocks, your money won't grow, and you're wasting the tax-free compounding magic.
- !Choosing a high-fee traditional bank. Many local banks offer NISA but limit your choices to expensive mutual funds. Going with a major online broker gives you access to ultra-low-fee index funds.
Pro Tip
Keep it simple! For most of us, the best strategy is to set up an automatic monthly transfer into the Tsumitate portion, buying a low-cost, globally diversified index fund (often called 'All-Country' or 'Orkan' in Japan). Automating this means you don't have to stress about market ups and downs—you just buy more shares when prices are low and fewer when they're high.
Did you know?
Did you know that Japanese households hold over ¥2,000 trillion in personal financial assets, but more than half of it has historically sat in dusty, zero-interest bank accounts? The 2024 NISA launch was designed to wake up this sleeping giant. In just the first three months of 2024, Japanese investors poured over ¥3 trillion into the new NISA, proving that the nation is finally ready to let its cash work hard in the stock market!
References
Read the full guide on how to use this calculator effectively
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