Tax Calculators

Basic Sri Lankan personal tax calculators.

Estimate key tax figures in seconds. These tools are for planning only and should be checked against the latest Inland Revenue Department guidance before filing.

Annual taxable income estimator

Enter your monthly salary, monthly other income, and estimated annual reliefs. The calculator converts this into a basic annual taxable income estimate.

Provisional tax set-aside calculator

Estimate how much tax to set aside monthly and quarterly based on your annual taxable income and expected effective tax rate.

Late payment penalty estimator

Estimate potential penalty amounts for planning conversations. Actual charges can differ based on official rules and case details.

How to use these tools

Use annual estimates, not exact filing values.
Update numbers whenever income changes.
Keep records to support all tax figures.
Confirm final rules through official IRD sources.

Read the tax guide View tax services Talk to a tax agent

Important note

These calculators provide general planning estimates only. They are not legal or financial advice and may not represent your final tax outcome.