Verizon Communications Inc (VZ.N) said on Thursday it expected to incur about $500 million in pre-tax expenses in the second quarter as a result of its US$4.48 billion purchase of Yahoo Inc's (YHOO.O) core business.

Verizon is combining Yahoo's internet assets with AOL, which it bought two years ago, to form a venture called Oath, led by AOL CEO Tim Armstrong. Oath's more than 50 brands include HuffPost, TechCrunch and Tumblr.

The expenses are related to severance payments, acquisition and integration costs, Verizon, the No. 1 U.S. wireless operator, said in a regulatory filing.

Reuters reported last week that Verizon planned to cut about 2,000 jobs or 15 percent of the 14,000 employees at its Yahoo and AOL businesses.

Verizon also said it expected to save over US$1 billion in operating costs through 2020 as a result of the Yahoo deal, which closed on Tuesday.

The closing of the deal, announced in July, had been delayed as the companies assessed the fallout from two data breaches that Yahoo disclosed last year.

On Friday, the remainder of Yahoo not acquired by Verizon will be renamed Altaba Inc, a holding company whose main assets will be a 15.5 per cent stake in Alibaba Group Holding Ltd (BABA.N) and a 35.5 per cent interest in Yahoo Japan Corp.