A survey has shown that a third of Ireland's estimated 200,000 Polish immigrants plan to leave within a year.

Ireland's decade-long construction boom, which attracted many eastern European workers, turned into a deepening recession this year.

That is in contrast with the Polish economy which has been growing at around 5%.

Of those surveyed, 33% said they planned to leave within the next 12 months, a further 13% said they would leave within the next two years and 9% said they would 'never leave Ireland'.

'Money was the main deciding factor for people to leave with 75% citing income as their main driver with family coming a close second,' the recruitment firm said.

Respondents also cited changes in Polish tax laws as a reason to return.

Poland now has a progressive personal income tax with three rates of 19%, 30% and 40%. From 2009, the system will be simplified to two bands of 18% and 32% with the vast majority of Poles set to pay the lower rate.

The CPL survey was carried out by email in the first three weeks of November and received responses from more than 500 people.