A nationwide campaign against the property tax has been launched by Sinn Fein.
The opposition confirmed it will also table a motion of no confidence in the Government in the Dail next week.
Party leader Gerry Adams accused Fine Gael and Labour of breaking their contract with the electorate and tearing up their election promises.
"During the election these parties stood on a platform of standing up for Ireland's interests in Europe; of 'not one more red cent' to be given to the banks; of protecting child benefit," said Mr Adams.
"The government not only failed to keep their promises but they have taken the extreme opposite approach. They have introduced a savage, regressive budget which among other measures sees a new tax on the family home, cuts to child benefit and payments to carers.
"The budget targets ordinary working families and the most vulnerable in our society and further damages the potential for economic growth and recovery."
Elsewhere Sinn Fein activists across the Republic have been mobilising against the family home tax, introduced in last week's budget.
Households will be hit with a 0.18% property tax rate, costing an average 250-300 euro a year, with a higher mansion tax rate of 0.25% for homes worth one million euro plus. Elected representatives, activists and supporters are angry at the tax hike, as well as cuts, are taking part in protests, information stalls and leaflet drops.
Deputy leader Mary Lou McDonald said campaigners will be active across the state this weekend and all next week. She also called for a major mobilisation at the Dail next Friday when the legislation is being debated.
"I would encourage as many people as possible to get out on the streets and show your opposition to this unfair tax before the government rushes it into law," Ms McDonald added.