The port operator said the investment will be financed from existing cash resources and cashflow.
The company, one of the more profitable assets of debt-laden Dubai World, warned of tough conditions for its customers in 2012 but said it would achieve throughput growth of more than 7 percent.
DP World has been pushing forward with growth into Europe and announced earlier this year that it would go ahead with the construction of its new London Gateway deep-sea container port, to be operational by the fourth quarter of 2013.
The company also listed in London in June, but this move has done little to boost liquidity in the stock, with the London listing on average trading less than 35,000 shares per day.