Influence of Promotion Opportunities on Employees’ Job Satisfaction in Tanzania: Evidence from Mpanda Municipal Council

This study examined the influence of promotion opportunities on employees’ job satisfaction at Mpanda Municipal Council in Tanzania, guided by Expectancy Theory. A cross-sectional mixed-methods design was adopted within a pragmatic research approach. Quantitative data were collected from 207 employees using a structured questionnaire, while qualitative evidence was obtained through three employee interviews to provide contextual explanations of the quantitative results. Quantitative data were analysed using descriptive statistics and multiple linear regression, while interview evidence was analysed thematically and used to contextualise the statistical findings. The reported regression model produced R² = 0.827; based on the reported R², a sample size of 207 and four predictors, the corresponding adjusted R² recalculates to approximately 0.824. Promotion rate had a statistically significant negative association with job satisfaction (β = −0.283, p = 0.003), whereas career development initiatives had a positive and statistically significant association (β = 0.192, p = 0.023). Internal mobility rates (β = −0.139, p = 0.110) and time in the current position (β = 0.075, p = 0.277) were not statistically significant. The qualitative evidence indicated concerns about perceived fairness, transparency, meaningful role changes, and future career prospects. The findings suggest that promotion opportunities do not improve job satisfaction merely through their frequency; their perceived fairness, transparency, and developmental value are central. The study contributes to Expectancy Theory by showing how the perceived instrumentality and valence of promotion-related outcomes can shape satisfaction in a local-government setting.