Most of the above advise is spot on!
Here's what we do--with NO EXCEPTIONS: At lease signing, tenant is instructed verbally and in writing in the lease that rent is due on or before 1st of each month. Rent is subject to late fee if not received in office before close of business on the 5th of the month. On the 6th (or next business day after 5th), calls, emails and texts go out to tenant about the missing rent. If not received in office by close of business of 10th of the month, a NTQ (Notice To Pay or Quit--our state's proper form to start eviction) is prepared and posted. (This expense is added to tenant's account.)
When tenant contacts us regarding the legal notice, our response is always the same: "As per your lease, no rent payment received starts the eviction clock ticking. Want to stop the clock? Pay the full amount of rent and late fees due NOW, or we will meet in court in front of the Judge."
"We don't WANT to evict you, but you if you cannot pay, you cannot stay."
An aside: 'payment plans to catch up' don't work. Tenants already have a payment plan--it's the lease. Remember also, we live in a litigious society--making exceptions to your set policy COULD be considered discriminatory re HUD/Fair Housing.