Your party levels up whenever the GM decides you've reached a narrative milestone (usually about every 3 sessions). All party members level up at the same time.
Daggerheart has 10 PC levels divided into 4 tiers:
→ Tier 1 encompasses level 1 only. > → Tier 2 encompasses levels 2-4. > → Tier 3 encompasses levels 5-7. > → Tier 4 encompasses levels 8-10.
Your tier affects your damage thresholds, tier achievements, and access to advancements.