Note: The current APC charge for PLOS One is $1,350.
From the PLOS Blog:
For the past six years, PLOS has absorbed increasing publishing costs without raising author fees. At the same time, PLOS invests resources to improve the quality of PLOS ONE output, thoroughly checking for ethics, competing interests and robust science. As a result, readers can be confident that research published in PLOS ONE is scientifically rigorous and reflects thorough peer review.
In addition, PLOS invests millions of dollars in research and development to increase the efficiency, transparency and speed of scholarly communication for all its journals. The center of this investment is the platform Aperta, a new submission system currently under development that aspires to substantially improve the publishing experience for authors, reviewers, editors and readers.
To support these endeavors, the Article Processing Charge (APC) for PLOS ONE authors will increase to $1,495 as of October 1, 2015 (effective 10:00 AM PDT). This is the first increase in the PLOS ONE APC since 2009.
Read the Complete PLOS Blog Post