Are social security deductions applicable to the 13th-month bonus?

Yes, it is classified as subject gross compensation, liable for the standard 9.18% employee CNSS deduction and progressive IRPP income tax.

How is the bonus calculated for employees joining mid-year?

It is calculated pro-rata temporis based on the exact number of months worked during the relevant calendar year.

TunisiaUpdated for 2026Finance

Tunisia 13th Month Salary & Performance Bonus Calculator 2026

Calculate net 13th-month pay and productivity bonuses after CNSS (9.18%) and personal income tax withholding in Tunisia.

Salaries & Monthly Wages Labor Law & Employment Income Tax & Brackets

Calculated Result

Net 13th-Month Bonus in Hand

1,157.96TND

Calculator Inputs

Base Monthly Salary

TND

Quick select:

Months Worked During the Year

Quick select:

Productivity Rating Multiplier (%)100 %

50 %150 %

Net 13th-Month Bonus in Hand

1,157.96TND

Gross Prorated Bonus

1,500 TND

CNSS Deduction (9.18%)

137.7 TND

Estimated Income Tax

204.35 TND

Gross Bonus Apportionment

Final Net Cash Bonus

1,157.96 TND(77%)

Employee CNSS

137.7 TND(9%)

Estimated Income Tax

204.35 TND(14%)

The 13th-month payment and performance bonuses are regulated by sector-specific collective conventions (Conventions Collectives) in Tunisia.

This calculator is a mathematical model for general financial estimation, planning, and educational guidance. Results depend on your inputs and standard formulas, and do not constitute binding financial, tax, or investment advice. Always consult a qualified professional before making financial decisions.

Official Statute: الاتفاقيات المشتركة القطاعية التونسية ومجلة الضريبة على دخل الأشخاص الطبيعيين (تنظيم الشهر 13 ومنح المردودية)Last Verified: 2026-09-06

Calculation Methodology

Gross bonus is determined on a pro-rata basis of active tenure and rating, then subject to 9.18% employee CNSS deduction and IRPP tax.

Frequently Asked Questions

It is legally mandatory for sectors whose applicable collective agreement (Convention Collective) prescribes it, such as banking, insurance, and retail.

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Tunisia

Tunisia 13th Month Salary & Performance Bonus Calculator 2026

Calculator Inputs

Gross Bonus Apportionment

Calculation Methodology

Frequently Asked Questions

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