UPDATE 1-Omnicom profit beats as US advertisers boost spending

* Fourth-quarter earnings $1.13/share vs est $1.09

* Revenue $3.94 bln vs est $3.93 bln

Feb 12 (Reuters) - Omnicom Group Inc, the largest U.S. advertising company and home to agencies such as BBDO Worldwide and DDB Worldwide, reported a better-than-expected fourth-quarter profit on higher revenue in its domestic market.

Many of the macroeconomic problems cited by advertising companies over the last few quarters, including instability in the eurozone and a slowdown in China, have been easing.

Advertising companies had also been concerned about the impact on advertising spending of the rancorous negotiations over the U.S. fiscal cliff during the quarter.

However, major advertisers such as Unilever Plc and Procter & Gamble Co are raising advertising and marketing spending, Macquarie Equities Research analyst Tim Nollen noted in a pre-earnings report.

Omnicom, the first of the major advertising companies to report results, did not provide an outlook in its earnings statement on Tuesday, but said in November it was feeling "increasingly positive" about 2013.

Net income rose to $307.1 million, or $1.13 per share, in the quarter, from $271.9 million, or 96 cents per share, a year earlier.

Revenue rose 2.4 percent to $3.94 billion.

Revenue from the United States, which makes up about half of Omnicom's revenue, rose 5.1 percent to $2.03 billion. International revenue slipped 0.3 percent.

Analysts had expected earnings of $1.09 per share on revenue of $3.93 billion, according to Thomson Reuters I/B/E/S.

Shares of the company, which competes with market leader WPP Plc, Interpublic Group and Publicis Groupe , closed at $55.36 on Monday on the New York Stock Exchange.