About This Calculator
Our Mission
This Sri Lanka Salary Tax Calculator was built to help employees quickly estimate their monthly and annual income tax obligations based on publicly available tax slabs issued by the Inland Revenue Department of Sri Lanka (IRD). The goal is to provide a simple, transparent and easy-to-understand tool for salary earners.
How It Works
The calculator applies the official progressive tax rates for the selected Year of Assessment. It converts your monthly salary to annual income, applies the relevant personal relief, and calculates tax based on progressive brackets. The result is then displayed as both monthly and annual values.
Data & Accuracy
Tax rates and personal relief values are based on official notices and amendments issued by the Inland Revenue Department of Sri Lanka. No personal data is stored, processed on a server, or shared with third parties. All calculations are performed directly in your browser.
Independence
This website is an independent informational tool and is not affiliated with the Inland Revenue Department of Sri Lanka or any government authority.
Versioning & Updates
Tax laws change periodically. The calculator is updated whenever official amendments are published. Please refer to the version number and last updated date shown on the website footer.