The payment for lone parents has risen to €15 while those receiving the living alone allowance will get a €5 increase in their payment, it has been revealed.
Minister for Finance Paschal Donohoe also confirmed a €2 increase to the fuel allowance to balance carbon tax.
And the Christmas bonus will be paid as normal to those in receipt of social welfare payments and pensions in December.
The bonus was restored to a 100% payment in last year's Budget after being slashed in previous years.
Meanwhile, Minister Donohoe also announced €13million for free retrofits under the Warmer Homes scheme.
The Government has announced a €1.2 billion fund to help absorb the impact of a no-deal Brexit.
The package includes €650 million to support the agri-food and tourism sectors.
There will also be €200 million made available to government departments to increase staffing levels and upgrade airports and ports.
Finance Minister Paschal Donohoe said the budget was "without precedent".
"This is a budget developed in the shadow of Brexit and the context for Brexit has shifted to no deal as our central assumption, this does not mean no deal is inevitable, but equally we stand ready if it does happen," he told the Dail in Dublin.
"In preparing for no deal we can ensure the Government has the necessary resources to meet the impact of Brexit, keeping our public finances on the credible path they have been on since 2011.
"We must increase the level and range of supports to ensure our economy is protected and this is why we are announcing over 1.2 billion euro, excluding EU funding, to respond to Brexit."
The spending plan is based on the anticipated gloomy financial outlook if the UK leaves with EU without an agreement on October 31.
"A no deal is unpredictable," said the minister."It will impact different sectors in different ways. Our response will demand flexibility."
The budget also included measures to tackle climate change, including a six euro per tonne hike in carbon tax.
Opposition finance spokesman Michael McGrath has said in reaction that this budget will be the last his party facilitates.
"Fianna Fail has afforded the Government the time and space to focus on delivering the best possible Brexit outcome for Ireland," he said.
"That was and remains the right approach from the largest party in opposition given the enormity of what is at stake.
"Our decision to allow a fourth budget to pass should not be misread as an endorsement of this Government.
"Like many of our citizens, we are deeply frustrated at the Government's obsession with spin and PR, and the failure to deliver where it matters.
"The people will have their opportunity to give their verdict on the Government, but for now the priority has to be to steer the country through this Brexit storm.
