Tamás Ascher was born in 1949 in Budapest. After graduating in 1973 from the Budapest Theatre Academy, he worked as a stage director in the Csiky Gergely Theatre in Kaposvár. Between 1978 and 1981 he worked for the National Theatre in Budapest, at the time run by Gábor Székely and Gábor Zsámbéki. Since 1983 he has worked as a stage director at Katona József Theatre, but at the same time has retained his position as artistic director in Kaposvár. Since 1989 he has been an individual member of the Union of the Theatres of Europe. He teaches at the Budapest Theatre Academy. In 2006 he has been appointed to the president of it.
His productions in the Katona Theatre include: Harold Pinter's Homecoming (1983), Chekhov's Three Sisters (1985) and Platonov (1990), Böll's The Lost Honour of Katharina Blum (1992), Goldoni's The New Home (1993), Pirandello's Tonight we Improvise (1994), John Arden's Live Like Pigs (1996), Werner Schwab's The Presidents, Yasmina Reza's "Art" (1997), Tom Stoppard's Arcadia (1998), Dorst's Herr Paul (1999), Kornél Hamvai's Headman's Holiday (2000), Brecht-Weill's Threepenny Opera (2001), Jon Fosse's Autumn Dream (2002), Kleist's The Revenge (2003), Chechov's Ivanov (2004), Congreve's The Way of the World (2005), András Forgách's The Key (2005), Ibsen's The Wild Duck (2007) and Gorky's Barbarians (2008).
His productions have toured in over fourty theatres all over the world. In 1987, at the BITEF in Belgrade, his Three Sisters won First Prize - shared with Crime and Punishment by Andrzej Wajda, and at the Caracas Festival the Prize of the Best Foreign Production of the year (1990). In 1990, his Platonov won the French Theatre Critics' Prize in Paris. In 2002, Tales from the Vienna Woods won the Prize of The Best Direction in Oslo. In 2004 at MESS Festival in Sarajevo, Ivanov won the Prize of Best Direction and Best Peformance.
In Hungary, he received the Hungarian Theatre Critics' Prize seven times, the prize of the National Theatre Festival four times, and, among other awards, the highest State Prize for artists, the Kossuth Prize, in 1992.