China Cross-Border Tax Guide 2026 — Foreigner IIT, 6-Year Rule, Tax Treaties

Individual Income Tax (IIT) for Foreigners — Overview

China's Individual Income Tax Law (个人所得税法) was significantly amended in 2018 (effective 2019) and further refined through 2025-2026. The key innovation for foreigners was the introduction of the 6-year residency rule, which replaced the previous 5-year rule under the old law. Under the current framework, a foreign individual's IIT liability depends on their residency status, which is determined by their physical presence in China. Resident individuals (居民个人) are taxed on worldwide income; non-resident individuals (非居民个人) are taxed only on China-source income. The progressive IIT rates range from 3% to 45% across seven brackets, applied to taxable income after deducting a basic allowance of 5,000 CNY/month (60,000 CNY/year) plus special additional deductions. How tax residency is determined in China →

The 183-Day Rule for Non-Residents

A foreign individual who is present in China for less than 183 days in a calendar year is generally treated as a non-resident. Non-residents are taxed only on China-source income — primarily salary earned for work performed in China. Importantly, under the IIT law and the relevant treaty provisions, if the foreigner is present for less than 183 days and their employer is not a Chinese entity or PE, the salary may be exempt from Chinese IIT under the "183-day rule" found in most tax treaties (Article 15 of the OECD Model). The 183-day count includes all days of physical presence, including short visits. The calculation is straightforward: any day in China counts as a full day. For 2026, this means a foreigner who spends fewer than 183 days in China and meets the other treaty conditions will owe no Chinese IIT on their employment income, provided the employer is foreign and does not have a PE in China bearing the cost.

The 6-Year Rule for Resident Individuals

A foreign individual who spends 183 days or more in China in a calendar year becomes a resident individual for that year. However, resident individuals are generally taxed on worldwide income. The 6-year rule (六年规则) provides a crucial exemption: a resident foreign individual is exempt from Chinese tax on their foreign-source income (e.g., foreign investment income, overseas rental income, foreign pension) if they have been a resident for less than 6 consecutive years. Once a foreigner has been a resident individual for 6 consecutive years (i.e., spending 183+ days in China each year for 6 years running), they become taxable on worldwide income starting in year 7. A single year of presence below 183 days will reset the 6-year clock. For example, a foreigner who spends 200 days in China each year from 2020 to 2025 will face worldwide taxation from 2026. But if they spend only 150 days in 2025, the clock resets and they gain another 6 years of foreign-source income exemption. Planning strategy: Many expats manage their days to stay below 183 days at least one year out of every six to avoid worldwide taxation.

The 5-Year Rule for Permanent Establishments

Separate from the IIT 6-year rule, the 5-year rule under China's Enterprise Income Tax (EIT) law and many tax treaties determines when a foreign enterprise is deemed to have a permanent establishment (PE) in China. If a foreign enterprise provides services in China through employees or agents who are present for more than 183 days in any 12-month period, or if a service PE exists for more than 5 years under certain construction/service contracts, the foreign enterprise may be deemed to have a PE in China. This triggers EIT liability (25% on profits attributable to the PE) and business tax obligations. For foreign contractors and service providers, managing the 5-year service PE threshold is critical. The 5-year rule is distinct from the IIT residency rules and applies to the corporate entity rather than the individual.

Individual Income Tax Treaties

China has one of the largest tax treaty networks in the world, with over 100 double taxation treaties in force (including agreements with the US, UK, Germany, France, Japan, South Korea, Australia, Canada, Singapore, and all ASEAN countries). Key provisions relevant to cross-border employees:

Article 15 (Income from Employment): Typically exempts employment income from Chinese tax if (a) the employee is present for less than 183 days in any 12-month period, (b) the employer is not a Chinese resident, and (c) the remuneration is not borne by a PE in China. Article 14 (Independent Personal Services): Similar 183-day threshold for independent contractors. Article 23 (Tax Relief Methods): Provides for foreign tax credit or exemption to avoid double taxation. Article 4 (Resident): Tie-breaker rules to determine residency for individuals who would be resident in both countries. The US-China treaty (1984, as amended) is one of the most invoked — it provides a 183-day exemption and also exempts certain teaching and research income, government service income, and pension income. Treaty relief is claimed through the 非居民纳税人享受协定待遇 process, which involves filing Form 501 with the local tax bureau (now largely self-declaration with post-filing audit risk).

Foreign Tax Credit and Relief

If a foreign individual is resident in China and pays foreign tax on foreign-source income, they may claim a foreign tax credit (FTC) against their Chinese IIT liability on that same income. The FTC is limited to the Chinese IIT that would have been payable on the foreign-source income. Excess foreign tax credits can be carried forward for up to 5 years. Alternatively, if a tax treaty provides for exemption rather than credit, the foreign-source income may be entirely exempt from Chinese IIT. For employment income, the treaty 183-day rule is typically the primary relief mechanism. For investment income (dividends, interest, royalties), treaty rates are reduced (e.g., dividends 5-10%, interest 10%, royalties 6-10%).

Practical Planning for Expats in 2026

Foreign employees working in China should: (1) Track physical presence days meticulously — use a day-count diary or immigration stamp log. (2) Plan overseas travel to reset the 6-year clock if needed — a single year below 183 days resets the count. (3) Ensure the employer does not create a PE risk in China through service delivery. (4) Review applicable tax treaty provisions, especially the 183-day rule and tie-breaker clauses. (5) Consider the tax treatment of home-country pension contributions and social security totalisation agreements (China has bilateral social security agreements with Germany, South Korea, Japan, Canada, Switzerland, and several others). (6) File annual IIT reconciliation through the 自然人电子税务局 (Individual E-Tax Portal) between January and March for the prior year. IIT annual reconciliation guide →