The Irish Rugby Football Union has admitted it will have to borrow money to fund the professional game over the next six years.
On Saturday, the IRFU revealed a €26 million loss in projected earnings from 5 and 10-year tickets that recently went on sale for €9,000 and €5,500.
Less than half the 3,700 available tickets were sold meaning the board only managed to make €14 million after expecting to bank around €40 million.
The 2,000 leftover tickets will now be available on a match-by-match basis with Irish rugby bosses hoping to make up the deficit with the sale of 5,000 premium level tickets in 2020.
"We've been to the market and the it has said what it has said, we sold just under 50 percent of the tickets," IRFU chief executive Philip Browne told the Irish Times.
"We will all have to tighten our belts but we are going to continue to operate at the levels we are at. We will continue to fund four professional teams and the national team and the domestic game.
"It is business as usual we are just going to have to borrow to fund that cash deficit over the next six years."
IRFU operations are heavily dependent on the income generated by the national team and the governing body will now have to borrow €25 million to keep the national and provincial squads competitive.
"Overall, if there's a message coming through here it's that the national team is the key provider for all activities undertaken by the union," Treasurer Tom Grace said in a speech at IRFU's AGM.
"Without the dividend this generates there would be no IRFU funding for provincial teams and consequently the branches would be relying on what they themselves can generate.
"There is absolutely no doubt that times are hard but we are extremely fortunate that we have managed our cash conservatively over the last number of years. The disappointing result with the sale of 10-year tickets reflects what is happening in the economy.
"I think, as a unit, we need to concentrate to develop again. If we don't spend on the development of the game we can throw our hat at it."