Factors influencing it include genetics, activity level, body composition, and diet. Someone with a faster metabolism (ectomorph body type) may need a larger caloric surplus to gain weight, while someone with a slower metabolism (endomorph) might need a smaller surplus to minimize fat gain. Regularly assess your progress and adjust your caloric intake accordingly.
Do you consider your metabolism when planning your bulk?"Tune into your body's signals; it tells you what it needs."