timing for deposit for quarterly match

[AlbanyConsultant]

I've got a plan that calculates the employer match on a quarterly basis, and in the back of my head I seem to remember a specific timing issue that relates to when that deposit has to be made.  Or maybe I'm mixing it up with something calculated per payroll having to be deposited by the end of the quarter...?  And because I don't know what I'm exactly looking for, I can't find anything that makes sense.  can anyone figure out what I'm talking about and half-remembering?  Thanks.

[Belgarath]

Perhaps you are thinking about the requirement for safe harbor matching plans? This requires that if the SH match is calculated on a payroll method, the matching contributions for a given quarter must be deposited by the end of the following quarter. 

[AlbanyConsultant]

I think that's it.  Thanks!