Red Bull has the standout budget among F1's UK-based teams, according to Germany's Auto Motor und Sport.
Citing British companies data, the magazine said Red Bull Technology - the Red Bull Racing parent - had a budget of EUR 245 million in 2011 as Sebastian Vettel sped to his back-to-back drivers' world championship.
Red Bull's budget last year was EUR 42 million higher than in 2010.
Brackley based Mercedes, meanwhile, reportedly spent just EUR 145 million in 2011 -- a full EUR 100 million less than Red Bull.
Lotus' 2011 budget was a reported EUR 155m, compared to Williams' 111m.
McLaren's figures are pending.
But the news about Red Bull coincides with a fresh wave of speculation in the paddock about the energy drink-owned team's defiance in the face of the teams-governed Resource Restriction Agreement (RRA).
"If they are ahead of us, it's because they've done the better job," he said.