Abstract:
Tax compliance has been examined from various perspectives by researchers since 
its impact on the economy is vital. This study aims to explore the relationship between 
the income and the taxpayer's compliance behavior using the assumptions in the 
Slippery-Slope Framework. The research focuses only on the small and medium level 
business community in Sri Lanka. The study empirically examines how a taxpayer's 
income influences tax compliance decisions with the perception of trust in the tax 
regime's authority and power. A self-administered questionnaire has been distributed 
to obtain the information needed from the target group and received 408 responses. 
Kendall's tau-b and Spearman's correlation coefficients were used to measuring the 
association's direction between two variables. The findings suggest that voluntary 
compliance has a positive connection, while enforced compliance shows a negative 
association with the taxpayer's income level. Also, the results prove that the level of 
income is a determinant of tax compliance. Besides, it has been established that the 
tax authority should take adequate measures to review the strategies developed to 
implement tax policy. This Research expects to give an insight into the operations of 
the revenue authority and decisions taken by policymakers and academics to explore 
the factors that encourage tax compliance.