Capital purchases in industries such as the manufacturing, energy and waste management sectors in the first three months of this year topped €1.8bn.
That's up from €1.1bn in the final quarter of 2014.
Purchases of computers and electronic products accounted for the bulk of the spend, according to the data from the Central Statistics Office.
Capital sales in the first quarter of 2015 amounted to €59.5m, compared with €28.1m in the same period last year.
The CSO data shows that €1.1bn was spent on computer, electronic and optical products by businesses during the first three months of this year.
In addition, €381.3m was spent on chemicals and chemical products.
The data details quarterly acquisitions and sales of capital assets in the mining, manufacturing, energy and waste management sectors.
The series are derived from queries about quarterly accounts to businesses in those areas with 20 or more people employed.
Earlier this week data showed that the rate of new business in the manufacturing sector sped up in May and was the fastest in three months.
Higher new orders from both domestic and export markets contributed to a further improvement in business conditions.