The 23 year old singer is worth €44 million.
The former One Direction star from Mullingar features on new RTÉ show, Ireland's Rich List.
The broadcaster's revealed to the Sunday Mirror some of the 30 wealthy people who'll appear on the series.
Hozier, worth an estimated €4.5 million, comes in second in the entertainers' category.
He's followed by Jedward who are worth €1.5 million.
Niall's friend Rory McIlroy tops the sports rich list at €96 million followed by Conor McGregor at €82 million.
Lads, you couldn't lend us a tenner, eh?!
Cover image via @niallhoran on Instagram