The parent company of the Sun and Sun on Sunday has reported a pre-tax loss of £75m in the year to 30 June, after taking charges of almost £90m in relation to the phone-hacking scandal.

News Group Newspapers' pre-tax loss of £75.1m is a significant reduction on the £318m loss run up in its financial report for the year to 3 July 2012.

NGN, the News UK subsidiary that published the now closed News of the World, recorded a total of £87.5m in costs described as "non-operational, one-off charges relating to allegations of voicemail interception and inappropriate payments to public officials and other related matters."

The company was also hit by a £40m one-off charge in compensation paid to Johnston Press for the termination of an agreement in relation to contract printing, allowing NGN to print all of its publications in-house.

The Sun publisher generated turnover of £514m, up from £493m the previous year, and spent £44m on sales and marketing.

NGN said revenue growth was helped by the launch of the Sun on Sunday, which began publication in February last year, as well as cover price increases on the Monday to Friday edition of the tabloid.

Within the £87.5m non-operational costs, £50m went on legal fees, a £10.2m charge for claimants' legal fees and damages and £26m for "primarily legal and professional fees" relating to the management and standards committee, responsible for the internal investigation of phone hacking and other alleged illegal activities at the company.

In relation to the charge for claimants' legal fees, the company admitted that the "final cost may or may not be significantly higher than the amounts recognised."

The £87.5m bill means that in the two years to the end of June, NGN has run up £375m in charges triggered by the closure of the News of the World in July 2011.

The company said the charges in its previous Companies House filing for the year to 3 July 2012 came to £288m.

This previous £288m charge also included a range of costs, such as legal fees, redundancy payments and non-cash write-offs on the value of "publishing rights" to the News of the World.

Editorial staff numbers went up from 467 to 486 year on year, while the overall wage bill fell from £43.8m to £39.9m.

Remuneration for directors of the company – of which four are listed including former chief executive Tom Mockridge, who resigned in December and moved to Virgin Media in May, and his replacement Mike Darcey – totalled £10m. This is significantly up on the £6.3m the previous year.

NGN said it paid out £12m to unnamed former directors for compensation for loss of office in the year to the end of June.

The company made £11.7m in redundancy payments, up from £9.1m in the previous year.

NGN did not pay any UK corporation tax.

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