2020 CBA.
50k a day for veterans / 4 years experience. Teams can't waive.
40k a day for rookies / less than 4 years experience. There's no clause for rookies that the fine is mandatory/articles have stated that could be waived.
https://overthecap.com/collective-bargaining-agreement/article/42
Unexcused late reporting for or absence from preseason training camp by a player under contract except those signed as (1) an Unrestricted Free Agent pursuant to Article 9; or (2) a Drafted or Undrafted Rookie pursuant to Article 7—mandatory fine of $50,000 per day. For the avoidance of doubt, any such fines shall be mandatory, and shall not be reduced in amount or waived by the Club, in whole or in part, but must be paid by the player or deducted by the Club as provided in Section 5(b) of this Article. For purposes of this Subsection (vi) and Subsections (vii)-(ix) below, preseason training camp shall be defined as the period beginning with the mandatory reporting date for any player through the Sunday immediately preceding the first game of the NFL regular season.
(b)(vii)
Unexcused late reporting for or absence from preseason training camp by a player under contract signed as an Unrestricted Free Agent pursuant to Article 9—mandatory fine of $50,000 per day, plus one week’s Paragraph 5 Salary for each preseason game missed. For the avoidance of doubt, any such fines shall be mandatory, and shall not be reduced in amount or waived by the Club, in whole or in part, but must be paid by the player or deducted by the Club as provided in Section 5(b) of this Article.
(b)(viii)
Unexcused late reporting for or absence from preseason training camp by a player under contract signed as a Drafted or Undrafted Rookie, pursuant to Article 7, except for a player in the fifth League Year of his Rookie Contract (the option year) after his Club has exercised the Fifth-Year Option pursuant to Article 7, Section 7— fine of $40,000 per day.
Section 5(b)
A fine under Subsections 1(b)(vi)-(ix) may be deducted from any payments owed to a player under any NFL Player Contract with the Club, or from any salary, bonus installments, Performance-Based Pay, Postseason Pay, Severance Pay or Termination Pay otherwise owed by the Club. The assignment and/or termination of a player’s contract after events triggering a fine under Subsections 1(b)(vi)-(ix) shall not result in any waiver of the assigning or terminating Club’s right to seek to recover the full amount of the fines.