"duplicative costs" is correct and usable in written English.
You can use it when referring to costs that are incurred again and again, often in an unnecessary way. For example, "The company was struggling to cover its duplicative costs."
The value of the deal could be worth an additional several hundred million dollars, if the combined company was able to slash duplicative costs, the executives said.
Still, because much of Pfizer and Wyeth's portfolios overlap, there is potential to save billions of dollars through cutting duplicative costs, analysts say.
According to Peterson, "Automated systems generally pay for themselves within one year by reducing duplicative costs".
Operational efficiencies: Eliminating redundant infrastructure and duplicative operating costs will improve the financial performance of the combined entity.
It certainly isn't hurting anybody but it's duplicative, inefficient and costs the government about $450,000 a year.
In fact, so the reasoning goes, mergers between companies that offer complementary products far more often increase economic efficiency by avoiding duplicative management and distribution costs.
Few institutions are as advanced as the VA, for example, in automating patients' records - an important factor in reducing medication errors, eliminating duplicative tests and containing costs.
Their mission, NASA declared, was to "reduce shuttle costs by cutting out duplicative or unnecessary work while still performing all the work required for safe and reliable flights".
"There is no reason for taxpayers to be subsidizing a duplicative catfish inspection program that will cost millions to set up and another $15 million to operate annually," Ms. Shaheen said.
"We certainly don't need a mammoth escalation in health care costs, especially if it's duplicative spending in an area that has not been medically validated".
Various models of genomic duplications, e.g. the duplicative transposition or the endoduplication, have been documented.
