Holman turned professional in October 2013, and his first professional tournament was the
Western Australia Goldfields PGA Championship at
Kalgoorlie Golf Course from 3–6 October 2013. In only his fifth professional tournament, in November 2013, Holman made the cut at the 2013
Talisker Masters played at the
Royal Melbourne Golf Club and significantly, was tied for the lead at the half-way mark. He went into the final round tied for second, having played the third round with
Adam Scott, a player Holman has described as an idol. Although Holman faded in the final round with a 78, he did shoot three sub-par rounds to finish on -3 and 15th place in a tournament field of 120 competitors. He finished 13th on the PGA Tour of Australasia Order of Merit, having finished in the top 25 in six of the seven tournaments he played as a professional. Holman earned his
Asian Tour card for 2014 through Q School and placed 52nd on the Order of Merit, with his best finish a tie for second at the
ICTSI Philippine Open. In addition to finishing 34th on the PGA Tour of Australasia Order of Merit, he also played four European Tour events in 2014 and finished 201st in the Race to Dubai as an affiliate member. Through his Asian Tour membership, Holman earned entry into most of the events co-sanctioned by the Asian and European Tours in 2015, and received invitations to several other European Tour events. In all, he played ten European Tour events in 2015 and finished 135th on the
Race to Dubai as an affiliate member. This earned him conditional status on the 2016 European Tour and entry into the final stage of Q School, where he was unable to earn a full card. In December 2015, Holman earned the first professional win of his career, the
Australian PGA Championship, with a par on the first hole of a playoff with
Harold Varner III of the United States and
Dylan Frittelli of South Africa. The win at a tournament co-sanctioned by the European Tour earned Holman the top spot on the final 2015
PGA Tour of Australasia Order of Merit as well as spots in the 2016
Open Championship at
Royal Troon and the 2016
WGC-Bridgestone Invitational. The win also secured Holman's card on the 2016 European Tour just two weeks after he had failed in his bid to secure a spot on that tour via the qualifying school. ==Amateur wins==