Monk reached his second World Championship by finishing 35th on the 2012 ProTour Order of Merit, claiming the fifth of sixteen spots that were awarded to non-qualified players. He lost 3–0 to Peter Wright in the first round. Monk was ranked world number 45 after the event. At the UK Masters he defeated Ian White and Mark Walsh both 6–4, before missing one match dart in the third round against Robert Thornton to lose 6–5. He was beaten 6–4 by Ricky Evans in the semi-finals of the Under-21 World Championship, and lost 5–2 to Gaz Cousins in the second round of the UK Open. In total he reached the last 16 stage four times during the year but could not advance beyond this stage.