Tier 1: Micro-Volunteers (1–3 hrs/week, 2–4 weeks)

Tier 2: Project Volunteers (3–5 hrs/week, 1–3 months)

Tier 3: Core Volunteers (5+ hrs/week, 3+ months)

Tier Description Ideal Duration Weekly Hours
Tier 1: Micro-Volunteers Task-focused, short-term 2–4 weeks 1–3 hrs
Tier 2: Project Volunteers Contribute to a full initiative 1–3 months 3–5 hrs
Tier 3: Core Volunteers Ongoing programs or leadership 3+ months 5+ hrs