That estimate was based on sales through March 31, the company said.
PeopleSoft created the liability by including a money-back guarantee clause in many of its customer contracts over the past year. It began the so-called customer assurance program as part of its defense against a US$9.4 billion hostile takeover bid launched by Oracle last June.
Although the US antitrust regulators are suing Oracle to block the merger, PeopleSoft has continued the guarantee program, which is set to expire June 30.
