People started to wonder just how much money Mariah made every year after the Daily Mail claimed in 2015 that since 1994, Mariah's instant-classic song made her £376,000 annually (at current rates, that's over $400,000!). However, fans were skeptical of whether that figure was accurate.
A 2014 article in the New York Post claimed that "over the course of 19 years — from 1994 to 2013 — the song made [Mariah] a total of $50 million in royalties. When we calculate that out on an annual basis, it's $3.8 million per year."
It's possible those figures, while unspecified, were global, and definitely out-measured the Daily Mail's figures.
As it turns out, per a 2017 report in The Economist, "All I Want for Christmas Is You" in the U.S. alone provided Mariah with $60 million between 1994 and 2016, meaning it nets her an average of approximately $2.6 million per year.
That's not even counting the U.K. royalties, the streaming plays, and more. In 2020, Mariah went the extra mile by also airing a Christmas special on Apple TV Plus known as Mariah Carey's Magical Christmas Special. The exact monetary figure that special netted her was never disclosed.