According to Law No. 42/2016 from December 28, 2016, the lunch allowance exempt limits changed from EUR 4,27 to EUR 4,52 for payment in cash, and from EUR 6,83 to EUR 7,23 for payment in ticket with effect since January 1, 2017. For more information, also see https://dre.pt/web/guest/home/-/dre/105637672/details/maximized?serie=I&dreId=105637665 .
The note with the required changes is already released for customers: 2409650 - CALC: Law No. 42/2016 - Lunch Allowance exempt limits for 2017.