For me, it usually take 3 business days after the checkout date for the points to post.

However, it took 2 weeks from a recent checkout date (April 7th) for the hotel stay to post physically on my MR account. I don't know if others have experienced this problem. I contact MR earlier this week and they indicated that they have been having problems with stays being shown on the MR accounts. The points, however, were reflective within 3 days because the points total changed, but the hotel stay did not show up on the MR account screen.