Omnicom (OMC) 8-K Omnicom Prices $500.0 Million Senior Notes Offering

Exhibit 12.1

Computation of Ratio of Earnings to Fixed Charges
(Dollars in millions, except ratios)

	For the Three Months Ended			For the Years Ended December 31,
	March 31, 2009 (Unaudited)			2008			2007			2006			2005			2004
Earnings as defined:
Income before income taxes, as reported	$	261.0		$	1,615.1		$	1,585.1		$	1,381.7		$	1,247.2		$	1,174.9
Add: Dividends from affiliates		3.0			27.3			28.4			14.3			16.2			13.9
Interest expense(a)		26.8			124.6			106.9			135.1			111.4			55.0
Interest factor (re: rentals)(b)		39.3			163.6			165.0			155.2			157.6			161.0
Total earnings	$	330.1		$	1,930.6		$	1,885.4		$	1,686.3		$	1,532.4		$	1,404.8
Fixed charges as defined:
Interest expense(a)	$	26.8		$	124.6		$	106.9			135.1		$	111.4		$	55.0
Interest factor (re: rentals)(b)		39.3			163.6			165.0			155.2			157.6			161.0
Total fixed charges	$	66.1		$	288.2		$	271.9			290.3		$	269.0		$	216.0
Ratio of earnings to fixed charges		4.99	x		6.70	x		6.93	x		5.81	x		5.70	x		6.50	x

(a)	Interest expense includes interest on third-party indebtedness.
(b)	The interest factor related to rentals reflects the appropriate portion (one-third) of rental expense representative of an interest factor.