Abstract Background Children’s health has been a major focus of European health policy since 2000, with particular emphasis on early childhood and integrated services for children with chronic diseases. However, research on early child care in Bulgaria is sparse, mainly focusing on the role of nurseries, kindergartens and nursing care. Our aim is to investigate whether there are disparities in access to early childhood health services in Bulgaria. Methods A survey was conducted among mothers of children up to 7 years old between April and June 2022. The questionnaire, containing 49 questions, was based on the theoretical framework from the EU project ‘Models of child health appraise’, covering topics as: geographical and financial access to services, equity, quality, responsiveness to children and family needs, considered key features of outpatient child medical care. Statistical analysis utilized Chi-square, Fisher’s exact and ANOVA tests. Results A total of 413 Bulgarian women, with a mean age of 34.3 (±5.1), participated in the study. Almost all women (91.3%) reported that their children had a primary care provider. The mean time to reach the GP/pediatrician’s office was 16 minutes (95% CI 14.6 - 16.7), longest for residents of small towns and villages (21 minutes), p = 0.004. Parents from small towns (including villages) were six times more likely to experience financial difficulties related to their children’s healthcare services compared to those from the capital city (p = 0.047), as well as parents with low-income (p = 0.031). Emergency healthcare was the most demanded service by families with children under 7 years old, possibly due to its free availability. Parents with secondary education and from small towns lack access to non-medical health-promoting or preventive services such as breastfeeding consultations, speech therapy and others. Conclusions Significant financial and geographic disparities in access to early child health services exist in Bulgaria. Key messages • There are serious social health inequalities related to the access to outpatient child health services in Bulgaria. • There is an urgent need for specific child and family health strategy based on the principles of proportionate universalism.