Commercial Fixed Wing
Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Distraction
Deviation - Altitude Overshoot; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Issued Advisory / Alert; Flight Crew Returned To Clearance
Environment - Non Weather Related; Human Factors
After departing ZZZ Runway XX; Departure Control directed turn to 020 degrees; climb 10;000 MSL. Air Traffic Control then directed passing 11;000 MSL; cleared left turn direct ZZZ [VOR]; climb and maintain FL180. Air Traffic Control then amended clearance to 14;000 MSL.  With aircraft in the turn; autopilot engaged; thrust in climb power and Open Climb mode; aircraft exceeded 14;000 MSL by 275 feet during automatic level with autopilot likely due to light weight.  Air Traffic Control immediately gave us right turn 360 and firmly reminded us of our assigned altitude of 14;000 MSL; then called traffic at our 11 o'clock at 15;000 MSL.  Autopilot was disconnected; we initiated immediate turn to 360; manually complete the level off at 14;000 MSL.  There were no TA's or RA's during this event.  Aircraft never exceeded 14;300 MSL during this event.Got altitude assignment while climbing at a high rate.
Cause - Light weight aircraft as a result of very light passenger load.Suggestions - Awareness on aircraft operations with non-standard weight...much lighter than standard ops weights.
Air carrier flight crew reported overshooting an assigned altitude during departure and cited the rate of climb due to the aircraft being light in weight as a contributing factor.