How do you account for potential forfeiture of PTO days in your PTO accrual? Do you use a forfeiture rate?
Assuming that PTO is not vested, it would seem appropriate to consider an assumed forfeit rate in the calculations. What I have more often seen done is not to do so, and then take a credit to PTO expense as actual forfeitures occur.
Most of the companies for which I have worked recently provide for vesting after a rather short weighting period (eg 90 days) so the non-vested portion is fairly nominal and it may be easier to just ignore possible forfeitures until they actually happen.
But, in theory, if the non-vested portion is at all material, I suggest some reasonable estimate of forfeitures should be used.
At the most recent company I worked at, the policy was use it or lose it at year end. Nonetheless, we accrued the full balance of outstanding PTO each quarter and then wrote off the balance at year end.