Guidance and counselling are integral parts of modern academic programmes. Guidance and counselling form a crucial part of Bulgaria's education system and aid in shaping learners' behaviour and instilling proper discipline. Thus, the study sought to examine the effect of guidance and counselling on students' academic performance in Bulgaria. The target population was 628 learners from Zlatarski International School of Sofia. The study used a simple random sampling technique to collect the data. The collection of the data was done using questionnaires. The study results showed that guidance and counselling explain 25.8% of Bulgaria's academic performance variations. It was revealed that guidance and counselling is positively and significantly related to academic performance (β=0.489, p=0.006). The findings indicated that when the guidance and counselling increase by one unit, the academic performance will increase by 0.489 units while holding other factors that influence academic performance constantly. Counselling programs prevent educational, individual, social, psychological and emotional issues. Lack of guidance and counselling leads to bad morals and behaviour. This includes school dropouts, substance use, criminal offences and failure to keep jobs. The work of educational guidance and counselling is to allow a learner to change themselves together with their studies by improving their study perspective and getting rid of subject matter challenges. The study recommended guidance programmes should be embedded in the curriculum of schools. School heads should establish an evaluation register for a learner for counselling.