On 29 June 2026, Shanghai Municipal Tax Service of China’s State Taxation Administration published a Memorandum on Individual Income Tax Issues Related to Foreigners’ Duration of Stay in China (“Memorandum”), The Memorandum illustrates how existing China individual income tax (“IIT”) rules apply when a non-domiciled individual’s actual residence days differ from the estimate used for the individual’s first IIT filing of the tax year.
Why This Matters
Under China’s IIT rules, an individual who is not domiciled in China is generally treated as a resident individual if they reside in China for 183 days or more in a tax year, and as a non-resident individual if they reside in China for fewer than 183 days. The distinction, along with the six-year rule and any applicable tax treaty, affects how employment income is calculated and reported.
At the individual’s first IIT filing of the tax year, the actual number of residence days for the full year is usually not yet known. Announcement No. 35 [2019] therefore requires a non-domiciled individual to estimate both their residence days in China for the tax year and, where a tax treaty is relevant,
their days of presence during the period specified by that treaty. Tax is initially calculated according to that estimate.
The actual outcome can later differ from the original estimate. For example, an employee initially treated as a resident individual may resign and leave China earlier than planned, ending the year below 183 days. Conversely, an employee initially treated as a non-resident individual may extend the assignment and ultimately reach 183 days.
The Memorandum explains how these changes should be handled and illustrates the first two situations through three hypothetical scenarios.
Three Scenarios Where Actual Residence Days Differ from the Estimate
Scenario 1: Initially treated as resident, but actually non-resident.
The individual was expected to reside in China for at least 183 days in the tax year and was therefore initially treated as a resident individual. The individual’s stay is subsequently shortened and the actual residence period for the tax year is less than 183 days.
Scenario 2: Initially treated as non-resident, but actually resident.
The individual was expected to reside in China for less than 183 days and was initially treated as a non-resident individual. The stay is subsequently extended and the individual ultimately resides in China for at least 183 days during the tax year.
Scenario 3: Actual stay exceeds an initially estimated short-stay threshold.This scenario covers either:
- a non-domiciled individual who expects cumulative residence in China not to exceed 90 days in a tax year, but whose actual cumulative residence exceeds 90 days; or
- an individual who is a tax resident of a treaty jurisdiction and expects their presence in China not to exceed 183 days during the period specified by the applicable tax treaty, but whose actual presence exceeds that treaty threshold.
How to Correct China IIT in Each Scenario
Scenario | Initial estimate / treatment | Actual outcome | How to correct | Timing | Late payment surcharge |
Initially treated as resident → actually non-resident | Individual without domicile in China is expected to reside in China for 183 days or more in a tax year, so IIT is withheld on a resident individual basis | Actual cumulative residence in China is less than 183 days in that tax year | Recalculate the individual’s IIT for the year under the non-resident individual rules and settle any additional tax or refund | Report to the competent tax authority from the date it becomes clear that the resident conditions cannot be met, up to 15 days after the end of the tax year | No late payment surcharge, provided the required reporting, recalculation and additional tax payment are completed within the prescribed period |
Initially treated as non-resident → actually resident | Individual without domicile in China is expected to reside in China for less than 183 days in a tax year, so IIT is withheld on a non-resident individual basis | Actual cumulative residence in China reaches 183 days or more in that tax year | Do not change the withholding method during the year. After year-end, the individual files an annual IIT reconciliation as a resident individual and settles any tax payable or refundable | Through the resident individual’s annual IIT reconciliation. If the individual leaves China during the year and does not expect to return within that year, the reconciliation may be completed before departure | Normal annual reconciliation rules apply |
Actual stay exceeds the originally estimated short-stay threshold | Either: (a) an individual without domicile in China expects cumulative residence in China not to exceed 90 days in a tax year; or (b) a tax resident of a treaty jurisdiction expects presence in China not to exceed 183 days during the period specified in the applicable tax treaty | Either: (a) actual cumulative residence exceeds 90 days in that tax year; or (b) actual presence exceeds 183 days during the treaty-specified period | Recalculate IIT for the relevant previous months’ salary and wages under the rules applicable after the relevant threshold is exceeded, and pay any additional tax | Report and pay within 15 days after the end of the month in which the relevant 90-day or treaty 183-day threshold is reached | No late payment surcharge, provided the required reporting, recalculation and additional tax payment are completed within the prescribed period |
Key Takeaways from the Memorandum
Foreign individuals are generally taxed according to their physical presence in China. At their first IIT filing of the tax year, they may estimate their expected days of stay and have IIT withheld on that estimated status accordingly.
Two of the situations discussed above carry a filing obligation, and the late-payment surcharge waiver applies only within the corresponding window — outside it, the surcharge is imposed:
- An individual pre-filed as a resident whose actual stay falls short of 183 days must report to the tax authority once resident status can no longer be met, and in any event within 15 days after year-end.
- An individual who initially expects to stay 90 days within a tax year or less (or, under a tax treaty, 183 days or less during the period specified in the applicable tax treaty ) but whose actual stay exceeds that threshold must report within 15 days after the month-end in which the threshold is crossed. Unlike the first case, this individual’s residency status doesn’t change — only the applicable non-resident computation rule does.
An individual pre-filed and withheld as a non-resident whose actual days later reach 183 or more has no mid-year filing obligation. Withholding continues unchanged on the original non-resident (monthly) basis, and the position is reconciled — any shortfall or overpayment settled — through the following year’s annual IIT reconciliation. If that individual leaves China during the year and does not expect to re-enter before year-end, they may elect to complete the annual reconciliation before departure, rather than waiting for the standard filing cycle.
Enterprises are advised to keep detailed records of foreign employees’ entry and exit dates and monitor them proactively, so a shift in tax residency status can be identified early. Enterprises should also ensure employees meet filing deadlines, complete any required refund or supplementary payment, and file the annual reconciliation on time — and should confirm that each employee’s tax residency status and corresponding withholding obligations remain accurate, to keep tax risk under control.
CW Insights
Counting residence days. Under MOF and STA Announcement [2019] No. 34, a day is included in a non-domiciled individual’s China residence days only if the individual remains in China for the full 24 hours of that day. A day on which the individual remains in China for less than 24 hours is not counted. Employers should retain accurate entry and exit records, including the relevant dates and times, rather than relying solely on the employee’s original estimate.
Practical implications for HR. Because the correction path differs depending on the direction of the change, HR and payroll team are better placed to respond in good time when actual travel is tracked throughout the year consistently rather than reviewed only at year-end or on discovery.
Late-payment surcharge waiver. The waiver of the late-payment surcharge (滞纳金) on supplementary tax is not automatic — it applies only where the required report is filed within the applicable window: 15 days after year-end for a resident individual who becomes non-resident, or 15 days after the month-end in which the 90-day (or treaty 183-day) threshold is crossed for the third scenario. Missing that window converts what would otherwise be a routine correction into a penalty exposure.
Employer permanent establishment (PE) exposure. While the rules discussed above relate to the individual’s own IIT compliance, extended presence in China can also raise a separate question for an overseas group entity: whether that overseas entity is itself carrying on business in China through the individual’s activities. This arises in secondment or dual-role arrangements — for example, where an individual formally remains on an overseas payroll, or continues performing work for an overseas affiliate, while physically based in China. Many of China’s tax treaties deem a foreign enterprise to have a permanent establishment in China once its personnel furnish services in China for more than 183 days within a 12-month period, which would subject that overseas entity to China corporate income tax on profits attributable to the PE. PE exposure depends on a range of factors beyond day count alone, including which entity functions as the individual’s “economic employer” (bearing the cost, direction, and benefit of the work) and the nature of activities performed.