Income Tax Calculator Sri Lanka

How this calculator works

• Choose whether you want to start from annual income or from a monthly income figure.
• The calculator applies the standard Sri Lanka resident personal relief first, then calculates tax on the remaining ordinary taxable income using the progressive annual bands.
• You can separately include extra deductions, capital gains, and qualifying foreign income to get a more realistic full-year tax estimate.

Worked example

For annual ordinary income of LKR 3,600,000, the calculator first removes the standard personal relief of LKR 1,800,000, then applies the progressive resident income tax bands to the balance.

Important assumptions

• This calculator uses the Sri Lanka resident individual tax chart for year of assessment 2025-2026.
• Capital gains are estimated at 10% and qualifying foreign or service-export income is estimated at 15% when entered.
• The monthly view is a convenience projection. The tax is still calculated on the annualized value because Sri Lanka resident income tax works on an annual basis.

Methodology and review

How this calculation is produced

• This tool converts the inputs into payroll or tax estimates using the salary, deduction, and band logic defined for the calculator.
• The output is designed as a planning estimate and can differ from a real payroll result if allowances, exemptions, or employer-specific rules are different.
• Where the calculation depends on tax bands or payroll structure, the calculator assumes the published rule set already reflected in the site data.

What to verify before relying on it

• Check the current Sri Lankan tax bands, APIT guidance, and payroll rules before using the result for a formal decision.
• Review payslip structure, employer deductions, and benefit treatment if your package is not a simple salary-only case.
• Confirm final values with payroll, finance, or a qualified tax professional when the number affects contracts or compliance.

When this tool is useful

• Use this before negotiating salary, reviewing a payslip, or planning take-home pay.
• Use it when comparing gross salary, deductions, and employer-side cost together.
• Use it again whenever tax bands, allowances, or salary structure changes.

How to read the result

• Separate gross pay, employee deductions, and employer cost instead of reading only one number.
• Treat the output as a planning figure until the real payroll setup and tax method are confirmed.
• Check whether the result is monthly, annual, or both before comparing it with an offer.

Common mistakes

• Confusing annual tax, monthly withholding, and retirement deductions.
• Ignoring bonuses, allowances, or non-cash benefits that change the true package.
• Comparing two salaries without normalizing them to the same pay period.

Good next steps

• Cross-check with a related salary or tax calculator if the decision is material.
• Review the official tax band or payroll rule if your case includes exceptions.
• Use the output to plan net pay, not just headline salary.

FAQ

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