Character advancement: ability modifiers

[Doppleman]

I would like to understand better the advancement of ability modifiers.

When you augment your ability modifiers by leveling or with permanent magic items, ex constitution, do you get all the hp you would have if you started with your actual modifier? I'm not sure if I'm clear enough.

Let's say you start lvl 1 with +2 con. You add +2 to each hp roll every level. Now you are lvl 16 with +4 con. Do you adjust you hp as if you always had +4?

Same for int. If your int grows from +1 to +2, Do you suddenly get 16 more skill points for that level?

That would be weird, but I'm wondering because if it's not working like that, creating a high level character would be difficult.

[Fuzzy-Wuzzy]

Yes all around. Pretty much everything in PF is retroactive that way.

[jbadams]

Yes, permanently increasing your abilities will give you all of the relevant skill points, HP, initiative, etc.

[dragonhunterq]

2 tidbits, just for completeness:

CRB Glossary wrote:

Permanent Bonuses: Ability bonuses with a duration greater than 1 day actually increase the relevant ability score after 24 hours. Modify all skills and statistics related to that ability. This might cause you to gain skill points, hit points, and other bonuses. These bonuses should be noted separately in case they are removed.

Also this FAQ confirms no real difference between temp and perm ability score increases, the book just shorthands the most common changes

[Kageshira]

jbadams wrote:

Yes, permanently increasing your abilities will give you all of the relevant skill points, HP, initiative, etc.

Wait, skill ranks are reatroactive?

[Fuzzy-Wuzzy]

Kageshira wrote:

jbadams wrote:

Yes, permanently increasing your abilities will give you all of the relevant skill points, HP, initiative, etc.

Wait, skill ranks are reatroactive?

Yup! (Along with everything else.)