Ireland is ranked 13th in the World Bank's annual survey Doing Business, up four places on last year.
The survey compares business regulations for domestic firms in 189 economies.
Ireland scores well for things such as trading across borders, paying taxes, and protecting minority investors, but sees lower scores for enforcing contracts and resolving insolvency.
Singapore comes first, again, for the ninth year in a row, with New Zealand second and Hong Kong third.
At the bottom of the table are Eritrea, Libya, the Central African Republic and South Sudan.
Finance Minister Michael Noonan noted that Ireland is now in the world's top-ten improvers' group, the only EU member state and the only OECD member to be included in this group.
The Minister said he welcomed the continued strong performance by Ireland in the Doing Business Report, which is reflective of the ongoing reforms being implemented in Ireland's business and regulatory environment as we continue to improve our competitiveness.
"The Doing Business Report makes a valuable contribution as it encourages countries to benchmark themselves against the best performing economies and it supports the reform agenda at a global level. Importantly, it focuses on the quality of regulations and not just their efficiency," Mr Noonan added.