Introduction

Many Sri Lankan employees are surprised when large tax deductions apply to annual bonuses.

Common searches include:

• Why is my bonus taxed?
• Bonus tax calculator Sri Lanka
• How to calculate bonus tax
• APIT on bonuses

This guide explains how bonus taxation works in Sri Lanka for 2026.

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Are Bonuses Taxable?

Yes.

Bonuses are considered taxable employment income under Sri Lankan tax law.

Taxable bonus payments include:

• Annual bonuses
• Performance incentives
• Commissions
• Leave encashment
• Arrears

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Why Bonus Tax Feels High

Sri Lanka uses progressive tax slabs.

Large lump-sum bonus payments may temporarily move your income into higher tax brackets.

This often creates higher deductions than expected.

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Bonus Tax Formula

Employers use separate APIT tax tables for lump-sum payments.

Your tax depends on:

• Monthly salary
• Annual income
• Bonus amount
• Existing tax deductions

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Example Bonus Scenario

Suppose:

• Monthly salary = Rs. 400,000
• Bonus = Rs. 1,200,000

The bonus may partly fall into higher tax brackets.

This can significantly increase tax deductions.

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Use a Bonus Tax Calculator

Instead of estimating manually, use:

👉 Sri Lanka Bonus Tax Calculator

The calculator estimates:

• Bonus tax
• Net bonus received
• Total annual tax
• Monthly tax impact

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Common Questions

Is every bonus taxable?

Most employment-related bonuses are taxable.

Can employers calculate bonus tax incorrectly?

Yes. Payroll mistakes can happen.

Can bonus tax be refunded?

Sometimes overpaid taxes may be adjusted during annual filings.