She spent much of her first term focusing on constituency issues, among them championing the 2013 Pyrite Resolution Act, a €50m compensation scheme for homes affected by the use of pyrite in their construction. She also secured funding for the Slane bypass, as well as increased funding for schools and local community sports projects. In addition, McEntee campaigned for improvements to mobile broadband coverage in Meath, and was a vocal supporter of the local agricultural industry. She campaigned for a yes vote in the 2015 referendum concerning the legalisation of same-sex marriage in the Republic of Ireland, and voted in favour of the proposed abolition of Seanad Éireann, the upper house of the Irish parliament. Following a random audit of 22 members of the Oireachtas in 2014, she was one of five politicians required to repay expenses they had claimed that had been declared ineligible. She described the episode, which resulted in her having to repay €1,675.88 of expenses, as being a result of "human error".