The Official Charts Company said "the time is now right" to add music streaming to the UK singles chart for the first time.
Chief executive Martin Talbot said:
Audio streaming has grown at an extraordinary rate over the past year - and the time is now right to take this important step.
Just as it [the Official Singles Chart] has evolved through the years to reflect the most popular music in the UK, from 10-inch to seven-inch, vinyl to cassingles, CD singles to downloads, this is the latest stage of that progression.
Music streaming on services such as Spotify and Napster will be included in the UK singles chart from July 6.
The Official Charts Company will weight the streaming so that 100 plays amount to one physical sale to differentiate between buying one specific track and merely choosing to play it as part of a general service.
So far this year, the average weekly figures volume of streaming is 70 times greater than the combined sales of downloads and physical singles.
Nationwide shoe shop Office has become the latest company to fall victim to a cyber attack, forcing the retailer to warn its customers to change their account passwords.
The high street chain confirmed its online security had been breached, following similar attacks on eBay and Spotify, but said customers' financial data had not been compromised.
The retailer has emailed users urging them to change their login details on other sites.
Office chief executive Brian McCluskey said: "We take such a threat very seriously and have been in communication with our customers to advise them of the matter.
"We can confirm that no credit card, debit card, Paypal or bank details were compromised in any way. In addition we have reported the matter to the relevant authorities."
Last week eBay announced that a breach in their security had given hackers access to more than 100 million users while Spotify updated its Android App after a user account was deemed to have been compromised.
Metallica's back catalogue is available on music streaming service Spotify for the first time after a landmark agreement between the two parties.
The company made several announcements at a New York event that included a conversation between Metallica drummer Lars Ulrich and Spotify backer Sean Parker, who also co-founded Napster and and was an early investor in Facebook.
Ulrich said the decision to join Spotify coincided with the fact the band now owns its entire catalogues of music.
Spotify also revealed that it has 20 million active users worldwide and that it has added a Twitter-like functionality that allows users to follow one another as well as celebrities and music producers.