Back in July, Elton admitted he would be "dead" if he hadn't asked for help with his addictions.
Marking his 30th sobriety birthday, he wrote on Instagram: "Reflecting on the most magical day having celebrated my Sobriety Birthday. So many lovely cards, flowers and chips from my sons, David, friends in the Program, staff at the office and in our homes."
"I'm truly a blessed man. If I hadn't finally taken the big step of asking for help 30 years ago, I'd be dead. Thank-you from the bottom of my heart to all the people who have inspired and supported me along the way."
And Elton - who also has sons Elijah, seven, and Zachary, 10, with his husband David Furnish - revealed he had to learn to "become a human being again" when he got sober.
He said: "It took a lot of work. I had to learn to walk again. I had to learn to be a human being again. I went to about 1,200 meetings in three years."
"I had to listen and I had to shut up too. I had to take people's advice, even though sometimes I didn't want to - but my way never worked so I listened and I got so much great help."