Yes you can, and tax free! That is the glory of an ISA. Please note that the ISA allowance for your ikigai ISA is based on gross contributions so if you withdraw, this will not affect your ISA allowance status (e.g., if you contribute £13,000 to your ISA in the 2020-21 tax year, and withdraw £3,000 in the same year, you are still only allowed to contribute £7,000 more to your ISA for the remainder of the tax year).

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