The Data Protection Commission (DPC) has said it is disappointed that it received less than a third of the extra funding it requested from the Government in the Budget.
Next year the DPC will receive an additional €1.6m or 11%, bringing its total budget for the year to €16.9m.
In a statement, Commissioner Helen Dixon said the body acknowledges the Brexit challenges facing the country, but it is disappointed that what it is to receive is much lower than what it had sought in its budget submission.
"The submission reflected a year of experience of regulating under the General Data Protection Regulation (GDPR) and highlighted the increased volumes and complexities involved," she said.
"The DPC must now reassess its planned expenditure for 2020, particularly in relation to foreseen "non-pay" expenditure for which the DPC has received a zero increase in allocation."
The commission acts as lead supervisory authority for the operations of many global technology firms across the European Union and has seen its workload rise considerably in recent years in line with the growing multinational sector here.
However, it has also seen its budget rise consistently and significantly, growing from €3.6m in 2015 to €15.2m this year.
It has used this money to recruit additional specialist staff and to deal with the additional demands that have accompanied the preparation for and introduction of GDPR.
The organisation says it also needs to move all its staff into one single premises in Dublin next year.
The body has been trying to regrow its presence in Dublin in recent times, following the decision in 2004 to move it to Portarlington under a government decentralization programme that was subsequently abandoned in 2011.