Why was there a withholding tax applied to UK REIT distributions in my ISA/JISA/SIPP?

Property Income Dividend (PID) distributions from UK Real Estate Investment Trusts (REITs) are withheld at a 20% tax rate before any payment is made to IBKR, and the net distribution is passed to you. Certain account types, including ISA, JISA, and SIPP accounts, qualify for exemption of this tax under dual tax treaties. At the end of each year, IBKR files a tax reclaim with HMRC on the client's behalf for clients holding UK REITs within an ISA, JISA, or SIPP. Refunds are processed in the tax year following the withholding event, subject to HMRC's processing timeline.

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