China Mortgage Deduction Required Documents | Generated by AI
Question: For China’s IIT Housing Loan Interest (Mortgage) Special Additional Deduction, what documents and information does a taxpayer need to prepare and submit?
Answer:
China IIT Housing Loan Interest Deduction — Required Preparation & Information to Submit
The Housing Loan Interest deduction is one of the six Special Additional Deductions (专项附加扣除) under China’s IIT system, introduced in January 2019. Here is a comprehensive breakdown of what you need to prepare and declare.
1. Eligibility Prerequisites (Before You Prepare Anything)
You must first confirm you qualify:
- The loan must be for the first home (first-time housing loan rate applies).
- The loan must be from a commercial bank or the Housing Provident Fund (HPF).
- The property must be located within China.
- The deduction is CNY 1,000/month, for a maximum of 240 months (20 years).
- A taxpayer is entitled to the interest deduction of a first-time housing loan only once.
- A taxpayer and his/her spouse shall not claim special additional deductions concurrently for housing loan interest and housing rent within a tax year. You must choose one or the other.
2. Married Couple Considerations
- The husband and wife may agree and choose one of them to claim the deduction; the detailed deduction method shall not be changed within a tax year.
- For first-time housing loans incurred by the husband and wife for houses purchased respectively before marriage, the couple may — after marriage — choose one house to claim 100% deduction, or claim 50% deduction for the house purchased by each spouse respectively; the detailed deduction method shall not be changed within a tax year.
3. Information You Must Fill In (via IIT App or Tax Portal)
When declaring via the 个人所得税 (IIT) mobile app or through your employer, you must input the following information:
| Field | Details Required |
|---|---|
| Taxpayer identity | Full name, ID number (居民身份证) |
| Spouse identity | Full name, ID number (if married) |
| Property address | Full address of the mortgaged property in China |
| Property ownership certificate number | From the real estate registration authority |
| Loan type | Commercial bank loan or Housing Provident Fund loan |
| Lender name | Name of the bank or HPF centre |
| Loan contract number | From your loan agreement |
| Loan start and end date | As stated in the loan contract |
| Deduction year | The tax year for which you are claiming |
| Who is claiming | Self (100%), or split 50/50 with spouse |
4. Documents to Retain (Not Necessarily Submitted, But Must Be Kept)
Taxpayers shall retain their housing loan contract and proof of loan repayment expenditure for future inspection. These supporting documents do not need to be uploaded proactively, but must be available if the tax authority requests verification:
- Housing loan contract (commercial bank or HPF loan agreement)
- Proof of loan repayment (monthly statements or bank repayment records)
- Property ownership certificate / real estate registration record (房产证 or 不动产权证书)
- Marriage certificate (if claiming as a couple or splitting the deduction)
5. How the Government Cross-Checks Your Data
The real estate registration information of the real estate department, together with the repayment information provided by the Housing Provident Fund centre and the financial supervision department, can be used as the information on the housing loan interest special additional deduction. This means the government cross-references your declared information automatically — accuracy is essential.
6. How to Submit
There are two channels for submission:
- Via your employer (withholding agent) — Submit the completed deduction information form to your employer’s HR/payroll department, who will incorporate it into monthly IIT withholding.
- Via the tax authority directly — It can be submitted to the withholding agent or directly to the tax authorities. Information will be consolidated between government departments, and personal information will be shared with the tax authorities.
- Via the IIT App — Click “办&查” (Services & Information), choose “专项附加扣除”, and select “housing loan interest” from the seven available items to complete the declaration.
7. Annual IIT Reconciliation (Annual Filing: March 1 – June 30)
During the annual IIT reconciliation period, a taxpayer may deduct or make supplementary deductions for housing mortgage interest among other special additional deductions. If you forgot to declare during the year, you can still claim during the annual settlement.
Summary Checklist
| What to Do | Status |
|---|---|
| Confirm loan qualifies (first home, bank/HPF, China property) | ✅ Verify eligibility |
| Decide who claims (self or spouse, 100% or 50/50) | ✅ Agree before filing |
| Declare via IIT App / employer | ✅ Fill in all required fields |
| Keep loan contract + repayment records | ✅ Retain ≥ 5 years |
| Keep property ownership certificate | ✅ Retain for inspection |
| Keep marriage certificate (if applicable) | ✅ Retain for inspection |
| Cannot claim housing rent deduction in same year | ✅ Choose one only |
References:
- Acclime China – Special Additional Deductions for IIT
- LinkedIn / Sophie Mao – Special Deductions for IIT in China (Official Measures Text)
- Shanghai Government – How to File Your IIT Return
- China Briefing – Annual IIT Reconciliation 2025