The IRS updates retirement plan contribution limits for defined contribution plans such as the PCA Retirement Plan each year. As announced November 1, 2018, the limits for 2019 are as follows:

Elective Deferral Limit (salary reduction contribution): $19,000 ($500 increase from 2018). Internal Revenue Code Section 402(g)

Defined Contribution Limit (employer plus employee): $56,000 ($1,000 increase from 2018).
Internal Revenue Code Section 415(c)

Catch-up Contribution Limit (age 50 or older): remains unchanged at $6,000. Internal Revenue Code Section 414(v)

If age 50 or older, a total of $25,000 in elective deferral contributions will be allowed in 2019.

Source: IRS Retirement Plan section