When you provide your IRD number to the share/bond registry (Link Market Services at: PO Box 384, Ashburton), you can ask them to deduct RWT from your interest at either 10.5%, 17.5%, 28%, 30% or 33% as appropriate.
The default rate is 33% if you do not specify a rate. Alternatively, if you have a valid exemption certificate you should send it to the registry and it will not deduct any New Zealand RWT from your interest or dividends.
From April 2020 failure to provide your IRD number will require the deduction of RWT from interest at the punative non-declaration rate of 45%
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