In 1899, the Berlin Academy elected Moszkowski a member. He was many times invited by piano manufacturers to appear in the United States to show off their pianos, but despite being offered massive fees, he always refused.
In 1908, by the age of 54, Moszkowski had already become a recluse as he began to suffer from poor health. His popularity began to fade and his career slowly went into decline. He stopped taking composition pupils because "they wanted to write like artistic madmen such as Scriabin, Schoenberg, Debussy, Satie."
His last years he spent in poverty for he had sold all his copyrights and invested the whole lot in German, Polish and Russian bonds and securities, which were rendered worthless on the outbreak of the war. On 21 December 1921, when he was ill and heavily in debt, his friends and admirers arranged a grand testimonial concert on his behalf at Carnegie Hall, involving 15 grand pianos on stage. The concert netted $13,275, with one part to provide immediate relief from his financial problems, plus an annuity of $1,250 annually for the rest of his life.
However, Moszkowski's illness lingered and he died from stomach cancer on 4 March of the next year, before the supply of funds could reach him. The money raised went instead to pay his funeral expenses and to his wife and son.
