This is far more than the number of job cuts that Credit Suisse planned as part of its restructuring plan before the Swiss authorities pushed UBS to buy its collapsed rival in an emergency.
In Switzerland alone, up to 11,000 jobs would be affected, the weekly believes.
Before the takeover, UBS employed just over 72,000 people compared to more than 50,000 at Credit Suisse.
The weekly does not specify the period over which these job cuts are planned, nor the activities most affected within the two banking giants.
Before being swallowed on March 19 by the bank's number one in Switzerland, Credit Suisse planned to cut 9,000 jobs by 2025 as part of its recovery plan.
The risk of duplication is perceived as significant, as the profiles of UBS and Credit Suisse are similar.
Like UBS, Credit Suisse is active in wealth management and investment banking, and its competitor also relies on the local business, which offers mortgages and loans to SMEs.
In Switzerland, its retail bank has 95 branches, compared to around 200 at UBS. Credit Suisse employs around 17,000 people there.
According to the Sunday edition of the tabloid Blick, the Credit Suisse brand should exist for another three or four years before disappearing.
Credit Suisse shareholders, who will receive only 76 cents per share, are due to meet in Zurich on Tuesday for the bank's Annual General Meeting. UBS members will also meet the next day in Zurich.
Their merger is taking place without the approval of their respective shareholders, the Swiss authorities having waived the obligation to consult them in the name of the best interests of the Swiss financial centre.
© 2023 AFP