New Nisa - Sale and Repurchase Explanation. (Via JPX)

[TokyoBoglehead]

非課税枠の再利用とは？ What is tax-exempt reuse?

「『新しいNISA』で保有している資産を売却すると、非課税保有限度額に空きができて、その分だけ翌年以降に再度購入できるということです。株式や投資信託を買ったときの金額で計算されるので、100万円で買った株式が200万円に上がったときに売ったとしても、再利用できるのは100万円分だけです」

When you sell assets held in the "New NISA," you free up space in your tax-exempt holding limit, and that amount can be used to purchase new assets in the following year or later. Since stocks and investment trusts are calculated based on the amount at the time of purchase, even if you sell stocks you bought for 1 million yen when they rise to 2 million yen, you can only reuse 1 million yen," says Mr. Tomita.


https://money-bu-jpx.com/news/article046914/

[TokyoWart]

So you have to wait until the following year before reinvesting? For instance if you sold in July, freeing up a 100万円 portion, you would not be able to reinvest until the following January?

[adamu]

Confusing to have two threads for the same topic so quoting here too.

Crucially, if you invested 10k and it grew to 20k and you sold and got 20k, only the original 10k would go into the bank account for reinvestment. The other 10k would be a tax-free gain but you can't invest it without using more lifetime allowance.

Ah, this explanation makes sense. Thank you!

I've added this example to the wiki. Further improvements welcome!

[zeroshiki]

So you have to wait until the following year before reinvesting? For instance if you sold in July, freeing up a 100万円 portion, you would not be able to reinvest until the following January?

Exactly, at least if you maxed out the current year‘s limit 2.4 or 3.6mil.
Otherwise, it would just be an incentive to frequently trade in the account which is not the purpose.

My understanding is the extra 1M doesn't add to next year's either. The limit for next year is still 1.2M+2.4M. What gets released is the lifetime limit. So you'd be able to get it back only in years where you can't invest anymore.