Here are some quick facts to get you started:
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​Employment in Portugal: Involves high employer costs and termination is hard.

Onboarding: The onboarding process typically takes 21 days.

Leave: Portugal offers a minimum of 22 working days paid annual leave, excluding public holidays.

Payroll & Tax: The payroll cycle is monthly.

You can use the OmniAtlas for more information and to compare hiring in different countries.