The reboot features returning stars Gabrielle Carteris, Shannen Doherty, Jason Priestley, Brian Austin Green, and Ian Ziering, who all appeared in the original series of the teen drama, which ran from 1990-2000.
According to editors at The Hollywood Reporter, each cast member will earn $70,000 (£57,929) per episode, with Spelling and Garth receiving an additional $15,000 (£12,413) per episode as co-creators of the series.
Priestley, who also directed one episode of the reboot, will pick up an additional $46,000 (£38,067) for his extra duties - which is the basic Directors Guild of America primetime network directing rate.
An industry insider told the publication the compensation was lower than expected, and commented they thought they'd earn "at least six figures (per episode)".
"BH90210" airs on FOX on Wednesdays.