Income from fees at Ireland's top four accounting firms rose by 16% last year as they generated €1.14bn in fees.
Employment at the Big Four increased by 12% to 9,696 according to The Irish Times' report.
KPMG managing partner Shaun Murphy said: "Continued economic growth has provided opportunities for Irish-based businesses to expand their operations."
He added that while the outlook is positive for the Irish economy, the upcoming in/out referendum on EU membership in the UK has created uncertainty and "contributed to some softening in business sentiment".
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