You may be using a Web browser that does not support standards for accessibility and user interaction. Find out why you should upgrade your browser for a better experience of this and other standards-based sites...
Is there a limit to how many No-Cost Extensions you can receive on one Sponsored Research Award?
There is not a limit to how many times you can request a No-Cost Extensions. However there has to be good detailed justifications for each request and the maximum length you can request each time is up to one year.