You are entitled to the total value of your labor. So profits (which still exist in a socialist system, DPRK still has profits, they abolished tax though because the state runs on profits from industry) are to be re-invested either back into production, or into infrastructure/housing/imports that are directly accessible to the workers.

Under capitalism, profits are not re-invested, and instead are controlled dictatorially by the capitalists who either hoard them, spend them on exotic luxuries so others can horde them, or waste it on projects that have no direct impact on worker wellbeing (see yachts, vaporware, military, police, etc.)

This doesn't apply to a communist mode of production, as communism has no profits and labor is utilized only where labor is needed.