More than a dozen protests across 11 counties have been organised for today by the Cost of Living Coalition.
The aim is to call on the government to take "radical action" regarding energy prices, cost of food, sky-high rents and more.
The group has warned that things may get worse for people in the new year once additional payments included in the Budget stop.
Sinn Féin TD Claire Kerrane told Newstalk that the budget failed to deliver real change that people need.
"The main aim of this weekend is to send a strong message to government that what they've announced in relation to the Budget and the cost of living package they announced, it has not been enough and it's not going to be enough", she said.
"We know the cot of living crisis is getting worse."
"We know that the supports that are needed aren't there."
Eight protests are planned for Dublin alone, with locations including Ringsend, Dún Laoighre, Finglas and Rathmines.
Nationwide, protests will take place in counties Cork, Galway, Limerick, Sligo, Wexford, Waterford, Carlow, Wicklow and Tipperary.
'Systemic issues'
According to People Before Profit TD for Dublin South-Central Bríd Smith, people will be left "in dire straits" after Christmas if the cost of living crisis continues.
Deputy Smith told Newstalk Breakfast: "They're not dealing with the systemic issues - for example, there's been no inflation matching increase for pensioners, for people with disabilities, for carers," she said.
"When these double payments are paid off, and after Christmas when there's no more extra money coming in, people are going to find themselves in dire straits because costs are still going up, particularly in housing and in energy.
"It gives the Government a temporary lift, there's no doubt about it... but people's living standards will effectively be cut come the new year and after Christmas.
"So we still need more to be done and more systemic measures to be taken".
Main image shows a cost of living protest at Merrion Square in Dublin in September. Photograph: Sam Boal/ RollingNews.ie
