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Posted Mon, 26 Sep 2022 13:23:52 GMT by Simon Holland
HMRC SA Interest is higher than my ISA account - Can I use self assessment overpayment as an investment alternative? 
Posted Tue, 27 Sep 2022 14:24:33 GMT by HMRC Admin 26

No. The SA interest is only applied to payments you have made for tax, and the tax is then reduced. This is currently sitting at 0.5 %.

Thank you.

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