The present study aims to evaluate the effect of timing of cleft palate repair on speech results by using objective assessment tools, under standardized variables. The patients included in the study were divided into three groups according to their age of palatal repair. Velopharyngeal closure was evaluated anatomically by nasopharyngoscopy, and the nasalance values were recorded and evaluated objectively by nasometer. Also, the rate of secondary surgical intervention and fistula rate was analyzed for each group. Nasalance values and nasopharyngoscopic evaluation results were statistically similar between group 1 and group 2. However, there was a statistically significant difference between these groups compared with group 3 in the nasalance value of all speech samples and terms of the velopharyngeal complete closure (p = 0.022). The rate of fistula and secondary surgical intervention was statistically similar between the groups (p = 0.080). In secondary surgical intervention rates, the difference between group 1 and group 3 was statistically significant (p = 0.016). The present study confirms the importance of the 18th month as a cut-of time in palatal repair for improved speech results by using objective assessment tools. (C) 2020 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.