Bookkeeping

Median side income: $1,000-3,000/month. Small businesses need bookkeepers but can't afford full-time ones. A freelance bookkeeper using QuickBooks Online or Xero can manage 5-10 clients at $200-500/month each, working 10-15 hours per week. The skills are learnable in 2-3 months through free courses (QuickBooks certification is free). The beauty of bookkeeping as a side hustle: the work is recurring (every month), clients are sticky (switching bookkeepers is painful), and the skills are evergreen. It's not glamorous, but it's the most reliable path to $2,000+/month with predictable hours.