Government party leaders have given the green light to a proposal that would limit State accommodation for new arrivals from Ukraine to 90 days.
The changes, which will go to Cabinet for formal approval tomorrow, will also include cuts to welfare rates.
It will mean that the current rate of €220 per week will fall to €38.80 for the period that people are in State accommodation.
However, they would receive a higher welfare rate when they leave these centres.
Under the changes, parents of children in State accommodation will continue to receive the full monthly child benefit payment of €140.
Some within the Government believe the new system will be in place at some point in January but the official position is that the changes will be implemented sometime in the first three months of next year.
There will be some flexibility for people who cannot find a place to live after 90 days with vulnerable cases being prioritised.
When this issue was discussed at Cabinet last October, the question of schooling for the children in these centres was a contentious point.
However, it is understood there will be no change to the legal right of Ukrainian children to seek to enrol in a local school.
If there are not enough places beside new accommodation centres, then children could be bussed to the next nearest school.
Some children may not enrol straight away but this already happens when families are waiting to see where they are accommodated.
Crucially, there will be no shadow schools in the new accommodation centres.
It is expected that the Department of Children will provide activities and youth work for children in these centres.
Earlier, Minister for Justice Helen McEntee said the changes were designed to ensure that those leaving Ukraine do not create a "pull factor".
Speaking in Dublin, Ms McEntee said there has potentially been an increase in what she described as secondary movement of people leaving Ukraine for another country, and then coming to Ireland.
She said the Government was trying to "negate" this movement" where she said "people potentially don't need to be coming to Ireland".
Ms McEntee also said that she believes it is important to have an honest conversation with people around immigration.
"We have seen a significant increase in the number of people seeking safety in Ireland. We've had 15,000 people seeking international protection last year alone so it's important that as a Government, as a country, we're honest with people as to the levels of immigration that we're going to see.
Taoiseach Leo Varadkar said the Government has to adjust the supports it offers people fleeing the war in Ukraine because of the pressure it is under in terms of accommodation.
He said the Government supports will be brought in line with what is offered in other western European countries, but the 90-day limit on staying in State accommodation will not see people thrown out of State-provided shelter.
Mr Varadkar said he is proud that Ireland has accepted around 100,000 people fleeing the war in Ukraine and that most of them are in State-provided accommodation.
"Ukrainians will remain welcome in Ireland, and those fleeing war, they will remain welcome in Ireland. But we are going to have to adjust to what we offer in terms of social welfare and accommodation in order to bring it more into line what the [other] western European countries are doing."
Mr Varadkar said when it comes to the 90-day limit of accommodation, the Government will take into account the difficulties people would face access affordable rental accommodation.
Additional reporting Paul Cunningham
