Another of News Ltd's Australian newspaper groups is to start charging readers of its online content, with the Melbourne tabloid Herald Sun planning to hoist a paywall next month.

Online and mobile phone users will be offered a mix of free and subscription-only content in what's known in the industry as a "freemium" model.

News CEO Rupert Murdoch wants online readers to pay. Credit:AFP

"We've created a new digital offering to meet the changing needs of our readers," said Herald & Weekly Times managing director Peter Blunden.

The Herald Sun will become a single brand across all platforms as a result of the change, with the company planning to release pricing details within weeks.