What Counts as 'Substantive Operation' in Hainan? The 183-Day Rule Explained

Hainan’s 15% corporate income tax rate can be valuable, but it is not granted by the business licence. A company must carry on a qualifying encouraged-industry activity, meet the applicable income threshold and operate substantively in Hainan. Without those conditions, the Hainan preference cannot be claimed; the general corporate rate is normally 25% unless another national preference applies.

Substantive operation means more than avoiding a shell-company label. The current standard asks whether production and business operations, people, accounting records and property are genuinely located in Hainan—or, in specified structures, whether Hainan management exercises substantive and comprehensive management and control.

The staffing element contains a precise test. Depending on total headcount, a company needs between three and thirty employees who each accumulate at least 183 days of residence in Hainan during the tax year. It is not enough to add several employees’ short visits together until the company reaches 183 days.

The standard is subject to periodic review. This guide explains the framework effective from 1 January 2025 through 31 December 2027 under the current notice. Verify the position with the local tax authority for the company, structure and tax year concerned.

Why does substantive operation matter?

The current Hainan 15% corporate-income-tax preference connects three main tests:

1. the relevant taxpayer is registered in Hainan, or is a qualifying Hainan branch, institution or establishment covered by the rules;
2. the company’s real main business is an encouraged-industry activity and satisfies the applicable 60% income threshold; and
3. the taxpayer is substantively operating in Hainan.

The policy has been extended through 31 December 2027. The detailed substance rules were renewed in the joint 2025 Hainan substantive-operation notice issued by the provincial tax, finance and market-regulation authorities.

Failing any required element can make the 15% preference unavailable. A genuine office does not repair a non-qualifying activity. A catalogue entry does not repair missing employees or books. A Hainan bank account does not prove that commercial decisions, contracts and delivery occur in Hainan.

The timing matters because the current system uses self-assessment, declaration and post-filing review. The company completes a substantive-operation self-evaluation commitment with its annual settlement and is responsible for the truthfulness, accuracy and completeness of its return and evidence. Under the 2025 notice, newly benefiting enterprises are subject to full-coverage review, while existing beneficiaries are sampled at a specified rate.

Read our complete guide to Hainan’s 15% corporate income tax before treating the rate as a forecast assumption.

The four elements of substantive operation

The four elements are connected. For a Hainan-registered resident enterprise with no outside branch, the current notice states that if any one of production and operations, people, accounting or property is not in the Free Trade Port, the enterprise is not substantively operating there.

Element	Current requirement	What it means in practice
Operations	Fixed operating place and necessary facilities in Hainan, with the main operating location or the institution exercising substantive and comprehensive management and control in Hainan; relevant contracts made in the company’s name	Hainan performs or controls the real work, rather than only issuing invoices
People	Employees needed for the business actually work in Hainan; wages are paid through the company’s Hainan bank account; the size-based 183-day threshold is met	Named people perform documented roles and individually satisfy the residence test where counted
Books	Accounting vouchers, ledgers, statements and other accounting archives are kept in Hainan; the basic deposit account and main-business settlement account are opened in Hainan	The records and primary banking can be produced in Hainan and reconcile to operations
Property	Property owned or used by the enterprise is actually used in Hainan and matches the production and operating activity	Premises, equipment, systems, inventory or other assets are proportionate to the business

“Property” does not mean every company needs a large office. A software or consulting business may reasonably use workstations, computers, systems and a meeting room, while a processor may need production equipment, storage and quality-control facilities. The asset profile must make sense for the activity.

Outsourcing bookkeeping is also not automatically disqualifying. The official question is where the accounting archives and key bank accounts are maintained and whether the company can produce reliable records. A local provider may help operate the process, but directors and management remain responsible for accurate books and returns.

The 183-day rule: how many people must qualify?

The 2025 notice applies three staffing bands:

Enterprise workforce	Minimum people who must qualify	Test for each counted person
Fewer than 10 employees	At least 3	Each person resides in Hainan for a cumulative 183 days in the tax year
10 to 99 employees	At least 30% of the workforce	Each counted person individually reaches 183 days
100 or more employees	At least 30	Each counted person individually reaches 183 days

This corrects two frequent misconceptions. First, the rule is not “the workforce collectively accumulates 183 days.” If three people each spend 61 days in Hainan, none individually reaches 183. Second, it does not require every employee to reach 183 days. The number depends on total annual headcount.

The workforce figure is reported as an average under the self-evaluation form. A person cannot be counted for two or more enterprises in the same year. The company must report all personnel who satisfy the 183-day condition, using the required identity information.

For an enterprise that opens or ceases operations during the year and has an actual operating period of less than six months, the residence-day threshold is calculated as half of the actual operating-period days. The minimum number of qualifying people under the applicable workforce band is not reduced.

The notice speaks in terms of residence and actual work. An employment contract, Hainan payroll entry or social-insurance record alone does not prove physical presence or real duties. Useful evidence can include Hainan payroll paid from the company account, attendance and access records, accommodation, travel history, work product, customer or supplier activity, meeting records and authorization logs. Evidence must be genuine and consistent.

A shareholder, director or legal representative is not automatically counted. That person must fall within the applicable employee calculation and actually work and reside in Hainan as claimed. Ask the tax authority or adviser how the current workforce calculation applies before relying on a governance title.

What about small and mid-sized companies?

The smallest businesses face a practical constraint. An enterprise with fewer than ten employees still needs at least three qualifying people. A one-person or two-person company therefore cannot satisfy the staffing threshold merely because its founder spends 183 days in Hainan.

For a company with 10 to 99 employees, at least 30% must individually meet the residence test. A 20-person annual average would therefore require at least six qualifying employees. Headcount changes, part-year hires and the official average calculation should be reviewed before year-end rather than estimated informally.

Tax reviewers will look beyond the number. Are the positions needed for the claimed business? Are wages reasonable and paid through the company’s Hainan account? Do employees have real assignments, reporting lines and work output? Does management authority in Hainan match the contract, payment and operational evidence?

Build an employee matrix showing role, hire date, payroll account, expected qualifying days, evidence owner and month-by-month status. Flag travel early. The correct response to a forecast shortfall is a genuine operating decision—not fabricated attendance or assigning names to a company after the work occurred elsewhere.

Practical checklist: are you meeting the standard?

Use this as an internal review, not a legal conclusion. Marking every box does not bind the tax authority.

✅ People

• The company has enough genuine employees for its business.
• Wages are paid through the company’s Hainan bank account.
• The correct number of named employees will each reach 183 days.
• Attendance, residence and work evidence agree with payroll and contracts.
• No person is counted for another enterprise in the same year.

✅ Books

• Accounting vouchers, ledgers and financial statements are kept or accessible in Hainan as required.
• The basic deposit account and main-business settlement account are opened in Hainan.
• Monthly or quarterly filings reconcile to invoices, contracts, payroll and bank statements.
• Related-party and cross-border payments have agreements and tax support.
• Records can be produced promptly during a review.

✅ Property

• The company has a fixed Hainan operating place appropriate to the activity.
• The company has ownership or use rights over the premises and assets.
• Equipment, systems, furniture, inventory or facilities are actually used in Hainan.
• Lease, access, utility, asset-register and usage records agree.
• The asset profile is proportionate to the claimed business.

✅ Operations

• The main operating location or substantive management and control is in Hainan.
• Relevant customer and supplier contracts are entered into in the company’s name.
• Hainan personnel approve pricing, procurement, delivery and payments within documented authority.
• Customer, supplier and project records show real Hainan work.
• The company does more than settlement, tax filing and invoice issuance for mainland activity.

Common mistakes that fail the substantive-operation test

Registration-only presence. The address appears on the licence but the company cannot be contacted there or provide an actual operating address. The current notice expressly identifies this as non-compliant.

Settlement and invoicing shell. The Hainan entity has no production or operating function and only settles mainland transactions, files tax or issues invoices. This is another express failure condition.

Paper employees. Names appear on contracts or payroll, but the people work in Singapore, Shenzhen or elsewhere and cannot show 183 days and actual Hainan duties. Payroll and social insurance cannot replace the underlying facts.

Remote books with no Hainan access. An accountant outside Hainan controls all files, the Hainan company cannot produce archives, and its basic or main settlement accounts are elsewhere. A bookkeeping contract does not cure a non-compliant setup.

Virtual address treated as an asset. Mail forwarding alone does not demonstrate the fixed operating place, necessary facilities or actual use of property expected by the activity.

All decisions offshore. The parent approves every contract, price, hire and payment while the Hainan company only executes instructions. Group oversight is normal, but the company’s claimed Hainan management and responsibilities must be real and documented.

Each pattern may make the 15% preference unavailable and can lead to tax adjustment after review. Deliberately false records create much more serious risk than an honest conclusion that the company does not qualify for a particular year.

How to build substantive operation from scratch

1. Design the Hainan function. Identify customers, contracts, deliverables, employees, assets, decisions and risks that genuinely belong to the company. Use the WFOE setup guide to align the legal entity with that function.
2. Secure appropriate premises. Choose a real office, workstation or operating site that can support the activity and official contact. Review our office and workspace service.
3. Plan qualifying staffing. Recruit enough real employees for both the operating model and the size-based 183-day threshold. Build payroll, roles, attendance and evidence from day one.
4. Open the required Hainan bank accounts. The basic and main-business settlement accounts belong in Hainan. If cross-border flows are material, assess whether an EF account fits separately; it is not a substitute for substance.
5. Implement local accounting controls. Keep accounting archives, close accounts and file returns consistently. Our bookkeeping and tax service can establish the monthly evidence process.
6. Document management and contracts. Define Hainan authority for customers, suppliers, pricing, hiring, assets and payments. Retain minutes, approvals, contracts and operating records that match reality.
7. Review quarterly and before annual settlement. Recalculate the encouraged-income ratio and staffing threshold, inspect each of the four elements and prepare the self-evaluation file. Use pricing to budget for formation, premises and recurring compliance support.

Do not hire three nominal employees or rent an unused room solely to tick boxes. Staffing, assets and costs must be commercially credible for the activity. Substance is an operating model, not a document package.

Common questions

Do I personally need to stay in Hainan for 183 days?

Not automatically. The enterprise must meet the threshold for its size. Each person counted must individually accumulate 183 days. A founder counts only if included under the workforce rules and the facts support actual Hainan work, payroll and residence.

How many employees must satisfy the test?

Fewer than 10 employees requires at least three; 10 to 99 requires at least 30%; and 100 or more requires at least 30. These are current 2025–2027 thresholds and can change.

Can a virtual office satisfy the standard?

A registration-only address is insufficient. The company needs a fixed operating place and necessary facilities appropriate to its business, actual use of matching property, and real operations or substantive management and control in Hainan.

What if the business is mainly online?

A digital business may have a lighter asset profile than a factory, but it still needs qualifying people, Hainan books and bank accounts, appropriate premises and assets, and evidence that Hainan performs or substantively controls the business.

If the company fails one year, is the benefit lost permanently?

The position is assessed for the relevant year. Failure may make the Hainan 15% preference unavailable for that year and require adjustment. The company can build qualifying facts for a later year, subject to the rules and tax-authority review then in force.

This article provides general information and does not constitute tax, legal, employment or investment advice. Requirements can change, and final eligibility is subject to tax-authority review based on current rules and the enterprise’s actual facts.