Mongolia Personal Income Tax Guide 2026

Mongolia operates a flat personal income tax (IIT) system at 10% on all taxable income. Social insurance contributions for employees total 11.5% (pension 5.5%, health 2%, benefit 1.5%, job 0.5%, accident 0.5%). Low-income earners benefit from a tax-free threshold of approximately MNT 4,800,000 per year. The Mongolian Tax Authority (MTA) administers all income tax. The tax year is the calendar year (January to December).

Overview — Mongolian Tax Authority (MTA)

The Mongolian Tax Authority (MTA) administers all domestic tax collection including personal income tax, corporate tax, VAT, social insurance, and other levies. Tax residents are taxed on worldwide income; non-residents are taxed only on Mongolia-source income. Residency is determined by physical presence of 183 days or more in a calendar year, or having a permanent home in Mongolia. Employees have tax withheld at source under PAYE. Self-employed individuals and business owners file annual returns directly with MTA. The currency is the Mongolian Tugrik (MNT).

Flat IIT Rate — 10%

Mongolia applies a flat 10% tax rate on all taxable income for individuals. There are no progressive brackets. The taxable income is calculated as gross income minus social insurance contributions and the tax-free threshold. The tax-free threshold is MNT 4,800,000 per year (MNT 400,000 per month), available to resident individuals with annual income below certain limits. For 2026, the flat 10% rate applies to employment income, business income, professional fees, rental income, and other ordinary income. Capital gains, dividends, and interest are also taxed at 10% (or final withholding rates where applicable).

Social Insurance Contributions — EE 11.5%

Employees in Mongolia must contribute to social insurance at a total rate of 11.5% of gross salary, broken down as follows:

Pension insurance — 5.5%
Health insurance — 2%
Benefit insurance — 1.5%
Job insurance — 0.5%
Accident insurance — 0.5%
Total employee — 11.5%

These contributions are deducted at source by the employer and are tax-deductible for IIT purposes (the IIT is calculated after deducting social insurance from gross income). The employer also contributes 12.5% on behalf of the employee, making the total combined social insurance rate 24%.

PAYE Withholding

Employers must register for PAYE with MTA and deduct tax monthly from employee salaries. The employer calculates monthly tax on gross salary, deducts social insurance contributions (11.5%), applies the tax-free threshold, and remits the net tax to MTA by the 10th of the following month. Employers file monthly PAYE returns via MTA's online portal. Employees receive annual tax deduction summaries for their records. Failure to remit PAYE attracts penalties of up to MNT 500,000 plus interest on the overdue amount.

Self-Employed Individuals

Self-employed individuals and sole proprietors are taxed at the same flat 10% rate as employees, but must file self-assessment returns. Estimated tax is payable in quarterly instalments by the 20th of the month following each quarter. The annual return must be filed by 15 February of the following year. Self-employed individuals can deduct allowable business expenses (rent, utilities, raw materials, salaries) to arrive at taxable profit. Proper books of account must be maintained. Social insurance contributions for the self-employed are voluntary but recommended at the applicable rates.

FAQs

Do I need to file a return if I pay PAYE through my employer?

All resident individuals must file an annual income tax return with MTA by 15 February, even if all tax was withheld at source. The process is simplified for PAYE-only employees.

Is overtime pay taxable?

Yes, all remuneration including basic salary, overtime, bonuses, commissions, and allowances are taxable as employment income at the flat 10% rate.

Can married couples file jointly?

No, each individual is taxed separately in Mongolia. There is no joint filing or income splitting for married couples.

What happens if my employer does not remit PAYE?

The employer is liable for the unpaid tax plus penalties. Employees should verify their tax compliance through MTA's online portal and request a Tax Clearance Certificate.

Disclaimer

This guide provides general information about Mongolian personal income tax for the 2026 tax year. Tax laws, rates, and regulations may change. Always consult with a qualified Mongolian tax advisor or the Mongolian Tax Authority for advice specific to your situation. InvestmentKit does not provide tax advice.