Ibec has urged continued vigilance over the reliance on corporation tax in an assessment of the Budget.
The employers group Head of National Policy and Chief Economist made the comments during an appearance at the Oireachtas Committee on Budgetary Oversight.
In his opening address, Gerard Brady told the committee members that the tax base in Ireland "continues to be significantly concentrated."
"Corporate tax, which was 16% of total taxation a decade ago is set to rise to almost one-third of all taxation in 2026."
Mr Brady said the Exchequer will "collect 87 cent in corporate tax next year for every euro we collect in income tax and USC."
"In a normal country, that would be about 25 cent."
He told the committee, which is examining the potential impact of Budget 2026, that Ireland will "collect €12,000 next year in CT for every worker in the economy, nearly €5,000 per worker more than what might be expected in other small open globalised economies."
"We must continue to be vigilant on this front and seek to reduce our fiscal exposure," he added.
Overall, the business body has given a welcome to the budgetary package, which it said delivered "a focus on driving innovation, protecting and creating jobs, and increasing investment in critical infrastructure."
Gerard Brady said the measures, announced on 7 October, "demonstrate sensible ambition" and he said there are a number which will "particularly support business activity in the country."
They include the commitment to invest an additional €2 billion in capital spending on infrastructure, the expansion of the Research and Development (R&D) tax credit to 35%, up from 30%, and the widening of the scope of qualifying research, which Ibec said are "crucial measures for fostering high-value job creation among both Irish and international firms."
The employers group also welcomed the reduction of VAT to 9% for the food led hospitality sector, as well as for new build apartments, which it said will "make more supply viable in the coming years," and the commitment of a €70 million or 17% increase in innovation capital funding.
The Head of National Policy and Chief Economist at Ibec said the organisation believes "the lack" of specific funding for in-work skills supports in the Budget "believe could be a missed opportunity."
In particular, Gerard Brady said there was "no provision for increased funding for Skillnet Business Networks," which he said are "critical networks of companies working together to build responsive training."
"This is a matched funding model, with a strong track record, which is significantly oversubscribed."
"In effect, the lack of matched public funding will mean millions of euro of private funding already committed will be left on the table," he added.
Mr Brady told the committee that some of the networks will "run out of funding to match private training funds looking to be deployed by next summer."
