I currently pay tax at the higher rate. Last year I received a small dividend (less than €20) from shares I had invested in. 20% withholding tax was deducted from this, so I probably am liable for a further 21%.
My question is do people typically fill out a Form 12 for such small amounts? Surely it would cost Revenue even more to process it.
Alternatively - what amount is "not such a small amount" - is there a rule - heard once that is was less than 1k - which may or may not agree with your "cost for the Revenue to process it theory".
I would suspect in these times, that the Revenue will take all they can get - given that the tax take is likely to be E3Bn lower than expected - pay it and your conscience is clear!
Make your tax return and include dividend on same. You possibly won't be asked for payment on such a small amount but at least you will have declared them.