Expertise is always double proficiency, but double proficiency can be granted without calling it expertise. “You gain expertise with that skill, which means your proficiency bonus is doubled for any ability check you make with it.”
What is a saving throw proficiency?
As with skill Proficiencies, proficiency in a saving throw lets a character add his or her Proficiency Bonus to Saving Throws made using a particular ability score. For example, the DC for a saving throw allowed by a spell is determined by the caster’s Spellcasting ability and Proficiency Bonus.
Can skill proficiencies stack?
No, proficiency bonuses never stack.
How does the proficiency bonus work in DND?
Your proficiency bonus is doubled for any ability check you make that uses either of the chosen proficiencies. (PHB p. 54) What that is saying is that, if you choose Perception for one of your Expertise skills, your proficiency bonus is doubled, not the entire Perception bonus. You would indeed get a total of +6 to Wisdom (Perception) checks.
Can a proficiency bonus be multiplied more than once?
If a circumstance suggests that your proficiency bonus applies more than once to the same roll or that it should be multiplied more than once, you nevertheless add it only once, multiply it only once, and halve it only once. – D&D Basic Rules V0.1 Chapter 1, P. 7
When do you get proficiency bonus in RuneScape?
Your proficiency bonus is doubled for any ability check you make that uses either of the chosen proficiencies. At 6th level, you can choose two more of your proficiencies.
Can a rogue double their proficiency bonus at Level 6?
– D&D Basic Rules V0.1 Chapter 3, P. 27 While not allowing proficiency bonuses to be counted more than once, expertise allows a Rogue to double the benefit of their proficiency bonus to two skills (or thieves’ tools) at level 1 and again at level 6. In the Backgrounds section of the Basic Rules & PHB, the following rule is listed:
