Start with the style of celebration you actually want, because Austria offers two distinct traditions. The slopeside afternoon party, beer and music in ski boots as the lifts wind down, is the St Anton and Saalbach experience, raucous and communal. The dressed up evening of concerts and clubs is the Ischgl and Kitzbuhel version, glossier and pricier. The best all rounder, St Anton, gives you both within a short, easy walk.
Weigh snow reliability against the strength of the scene. The most snow sure parties sit high, which is why Ischgl, Solden and Obergurgl never get cut short by thin cover. Characterful lower towns like Mayrhofen and Kitzbuhel trade a little snow certainty for genuine streets and better restaurants. If your dates fall early or late in the season, lean toward the higher resorts.
Match the base to your budget and the comfort you expect. Schladming delivers a lively night for noticeably less, Ischgl and Lech sit at the premium end with the service and dining to match, and Obergurgl is the calm, snow certain choice for a refined trip. For the wider picture, see our Europe apres ski ranking and the French scene in France apres ski, browse the full list in best apres ski resorts in Europe, and plan the trip from the Austria destination guide.