up to a point

To some extent, somewhat, as in I can work weekends up to a point, but after a month or so I get tired of it. This phrase uses point in the sense of “a definite position.” [Early 1800s]

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.