People coming to Ireland from Ukraine will be given PPS numbers, income supports and child benefit under plans being considered by ministers tomorrow.
Those fleeing the conflict will be met on arrival by officials from the Department of Justice and Social Protection.
The measures are being developed by Minister for Social Protection Heather Humphreys.
It is understood the child and family agency Tusla will also be available to those arriving from Ukraine.
The proposals are part of new wide-ranging plans which will be discussed by Cabinet tomorrow.
Earlier, the Taoiseach said that about 1,800 Ukrainian refugees have arrived in Ireland so far - 486 of whom arrived yesterday.
Speaking to Newstalk, Micheál Martin said about two-thirds of arrivals have connections with families in Ireland, but that number is decreasing.
He described the scenes at the Ukraine border as "horrific" and said the numbers queuing to cross the border represents the worst displacement of people since World War II.
"So this is a major humanitarian crisis on the continent of Europe, and the response to that will have to be outside of the norm," he said.
"It can't be business as usual in terms of how one responds to that and Government will be giving this consideration tomorrow morning at its Cabinet meeting."
Minister for Health Stephen Donnelly has confirmed people coming to Ireland from Ukraine will have full access to healthcare, including medical cards.
Yesterday, Minister of State in the Department of Justice James Browne said the number of Ukrainian refugees arriving in Ireland could exceed 80,000.
The UN said that more than 1.5 million people have fled Ukraine since the Russian invasion began on 24 February.
The Taoiseach said this is a war-time situation and therefore the response has to be different, adding that it will be "very, very challenging".
He said a portal will be developed this week by the Department of Children to organise expressions and pledges of responses from the people of Ireland, and that a number of health personnel have contacted them to say they are willing to help.
Government ministers are examining a variety of options to accommodate the unprecedented number of further arrivals.
The use of modular homes on state land is being explored and members of the public will also be asked to volunteer to host refugees.
Europe has 'held strong together'
In relation to sanctions on Russia, the Taoiseach said he does not favour unilateral actions by individual countries.
Mr Martin said he favours a 27-EU member state response because it is the strongest and has the greatest impact.
He said Russian President Vladimir Putin was hoping to create division in the European Union but Europe has so far "held strong together".
He said they need to keep the UN infrastructure "alive and going" as the ultimate forum to try and resolve issues around the conflict and get it stopped.
"I genuinely believe that we need to do everything we possibly can to keep intact the United Nations Security Council - the structures that ultimately allow a fora to get issues resolved," Mr Martin said.
"But without question the relationship with Russia will never be the same again, given the nature of this attack on so many people."
On the issue of Ireland's neutrality, Mr Martin said Ireland is "not politically neutral at all" on this war.
He said he believes Mr Putin does not believe in democracy and does not want it in Ukraine.
He said the focus now should be in helping Ukraine in any way possible, and he does not think there should be a knee-jerk response.
"But we should, when this war ends, create a fora for a reflection on that, because the world has changed," he said.
