The F1 legend, who like Wolff also owns a stake in the team, revealed last week that talks are ongoing which will see both men retained until 2020.
"My salary for the work I do is 750,000 euros," he told Osterreich.
"It is now being renegotiated with new contracts," said Lauda. "Of course there are championship bonuses but in my case they are quite modest -- they are not in the millions."
Wolff, who was at Hockenheim for the DTM finale last weekend, echoed his counterpart's claims.
"We are negotiating our contract extensions and it should all be done soon," he told Speed Week.
Bahrain International Circuit - Winter testing