https://www.imf.org/en/Publications/WP/Issues/2021/09/23/Sti...
So $400b. Still a lot.
But I really should locate a more recent version of this report...
https://www.imf.org/en/publications/wp/issues/2025/12/20/und...
In 2024 they found $725bn in explicit subsides, plus $6.7tn in implicit subsidies.
So $400b. Still a lot.