The National Economy Ministry said the budget draft, "built on peace", contains Europe's largest tax reduction program and prioritises support for families and pensioners, while calculating with significant pay rises.
President Tamás Sulyok and Deputy Prime Minister Zsolt Semjén will also be in attendance.
"We worked so that our family and our homeland could prosper, and to have a good working community. We worked to make Hungary successful," PM Orbán said.
The foreign minister welcomed that the two countries have doubled the turnover of bilateral trade since 2010.
The Hungarian Armed Forces are being rearmed and given the most advanced equipment.
János Bóka, the minister for EU affairs, said the poorer a member state is, the more it receives in European Union support.
The president said the protection of children transcended national interests, and caring for them was the most basic human inclination.
Tamás Deutsch said that the "Brussels grand coalition of parties" also represented in Brussels Tisza’s MEPs Péter Magyar and Kinga Kollár.
Róbert Zsigó said the 10pc markup cap had reduced prices of 887 products since its rollout five weeks ago.
"Hungary's fate can only be determined by Hungarians," the prime minister said.
Mihály Varga said the NBH's new management would concentrate on strengthening the fulfilment of its basic tasks, increasing transparency and efficiency, while rationalising other tasks.
László Kövér highlighted "traditionally good relations" between the two countries, which he said had been built not only on a historical but also on an economic foundation.
"With his presence, the president wishes to express Hungarians’ love and respect for the Holy Father," a statement said on Tuesday.
The prime minister's social media post included a black-and-white photograph of himself with the Pope, with the caption: "We say farewell."
The day of mourning will "express the nation's gratitude for the Holy Father and the nation's grief", the deputy prime minister said.