Session vs. Hired Gun
There's a difference between a session musician (hired for a specific recording session) and a hired gun (touring musician who performs live as part of your band). The rates, expectations, and agreements are different for each.
Recording Session Rates
In the US, union (AFM) scale for a recording session is $400–$600 per three-hour session per musician. Non-union rates vary widely: established session players in major cities typically charge $150–$400 per session; newer players or those in smaller markets may work for $50–$150. Remote recording (they record their part at home and send you files) is often priced per song: $50–$300 depending on the instrument and player's profile.
Live Hired Gun Rates
For live touring, flat weekly rates are common: $500–$1,500/week for newer acts; $1,500–$5,000+/week for established touring bands. Day rates for one-off shows range from $100–$500+ depending on the gig. Always separate the performance fee from per diems, travel, and accommodation — these should be provided on top of the performance rate.
What to Put in Writing
For recordings, your agreement should clarify: they are a work-for-hire (you own the master), they waive performance royalty claims, the session fee is full and final payment. For live, cover: rate, tour dates, per diem, travel arrangements, and exclusivity (are they allowed to play with competing acts during the tour?).