Kazakhstan Tax ID Guide — IIN & BIN Format, Validation & Registration
Kazakhstan uses two distinct 12-digit tax identifiers: the Individual Identification Number (IIN) for natural persons, and the Business Identification Number (BIN) for legal entities, branches, representative offices, and certain individual entrepreneurs acting as joint ventures. Both serve as the primary tax reference in all dealings with the State Revenue Committee (KGD).
Individual Identification Number (IIN)
The IIN is a 12-digit identifier automatically generated at first registration in Kazakhstan's unified population register. Once assigned, it is permanent — the IIN is never reissued or changed, even if the holder's name, marital status, or citizenship changes.
IIN Format and Structure
| Position | Length | Content |
|---|---|---|
| 1–6 | 6 digits | Date of birth in YYMMDD format |
| 7 | 1 digit | Gender + century of birth (see table below) |
| 8–11 | 4 digits | Sequential registration number |
| 12 | 1 digit | Checksum (control digit) |
Digit 7 — gender and century encoding:
| Value | Meaning |
|---|---|
| 1 | Male, born 1800–1899 |
| 2 | Female, born 1800–1899 |
| 3 | Male, born 1900–1999 |
| 4 | Female, born 1900–1999 |
| 5 | Male, born 2000–2099 |
| 6 | Female, born 2000–2099 |
Example: An IIN beginning with 900701 3 belongs to a male born on 1 July 1990.
Checksum algorithm: The 12th digit is calculated across two cycles using the weight sequence [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]. If the first cycle yields a remainder of 10, a backup weight sequence [3, 4, 5, 6, 7, 8, 9, 10, 11, 1, 2] is applied. A second result of 10 is treated as 0. [1]
When an individual operates as a sole entrepreneur (ИП), their IIN serves as the business tax identifier — no separate BIN is issued unless the entrepreneur operates as part of a joint venture.
Official IIN search: KGD Taxpayer Search — Entrepreneur
Business Identification Number (BIN)
The BIN is a 12-digit identifier assigned to legal entities, branches, representative offices, and individual entrepreneurs operating as joint ventures. Its structure encodes registration metadata directly.
BIN Format and Structure
| Position | Length | Content |
|---|---|---|
| 1–2 | 2 digits | Last two digits of the year of state registration |
| 3–4 | 2 digits | Month of state registration (01–12) |
| 5 | 1 digit | Entity type (see table below) |
| 6 | 1 digit | Unit type: 0 = head, 1 = branch, 2 = representation, 3 = peasant/farm joint venture |
| 7–11 | 5 digits | Sequential registration number (AIFC entities: 90001–99999) |
| 12 | 1 digit | Checksum (automatically calculated control digit) |
Digit 5 — entity type:
| Value | Entity type |
|---|---|
| 4 | Resident legal entity |
| 5 | Non-resident legal entity |
| 6 | Individual entrepreneur (joint venture / IP (C)) |
Example: A BIN beginning with 2303 4 0 was registered in March 2023 as a resident legal entity head office.
AIFC authorities and participants follow the same 12-digit format but receive sequential numbers in the range 90001–99999 (positions 7–11), making them identifiable in any public registry lookup. [1]
Official BIN search: KGD Taxpayer Search — Legal Entity
VAT Registration and the BIN
Mandatory VAT registration applies once a business's annual turnover exceeds 20,000 MCI (approximately KZT 78.6 million / ~USD 170,000 in 2025). From 1 January 2026, Kazakhstan's new Tax Code lowers this threshold to 10,000 MCI (~KZT 43 million) and raises the standard VAT rate from 12% to 16%. [2] The BIN is the mandatory identifier on all VAT returns, e-invoices, and counterparty verification checks.
E-Invoicing via IS ESF
All VAT-registered entities must issue invoices exclusively through IS ESF (Information System of Electronic Invoices), operated by the State Revenue Committee. From 1 January 2026, the deadline for issuing an e-invoice tightened from 180 to 15 calendar days after the transaction date, and new categories of non-VAT taxpayers — freight forwarders, commission agents, medical providers, lawyers, and importers — also became obligated. Access to IS ESF requires the entity's BIN and a qualified electronic signature (EDS). [3]
For a broader view of e-invoicing mandates across Central Asia and beyond, see the Lookuptax e-invoicing country requirements guide.
Frequently Asked Questions
Does a foreign company selling software or SaaS to Kazakhstani customers need to register and get a BIN, or does the reverse charge apply?
The answer depends entirely on whether your customer is a business or a consumer. For B2B sales, the Kazakhstani business buyer self-assesses VAT under the reverse charge mechanism — the foreign seller has no registration obligation, provided the buyer holds a valid BIN and VAT registration. [2] For B2C sales to individual consumers, there is no minimum revenue threshold — a single payment from a Kazakhstani resident triggers registration. Under the conditional VAT registration model effective 1 January 2026, the foreign company must submit a notarized Confirmation Letter to the Integrated Tax Administration System within one month of the first consumer payment. The Ministry of Justice assigns a BIN within one business day; VAT is charged at 16% and filed quarterly. Failure to register can result in blocking of internet resources in Kazakhstan. [4]
All VAT-registered entities must now use IS ESF — what exactly counts as a valid e-invoice, and what happens if you issue a paper invoice instead?
IS ESF is Kazakhstan's mandatory e-invoicing platform operated by the State Revenue Committee. All VAT payers must issue e-invoices for goods and services sold to other businesses; paper invoices are only permitted as emergency backup and must be entered into IS ESF within 30 calendar days of the emergency ending. [3] From 1 January 2026, the issuance deadline tightened from 180 to 15 calendar days after the transaction date. Access requires the legal entity's BIN and a qualified electronic signature (EDS) issued to the CEO; authorized employees may be delegated signing rights. Failure to issue or timely issue an e-invoice is an administrative offence under Article 280-1 of the Code of Administrative Offences. [5]
How does the AIFC tax regime differ from mainland Kazakhstan — and does an AIFC company use the same BIN as any other Kazakhstani legal entity?
AIFC participants receive a BIN structured under a distinct serial-number range (90001–99999 in positions 7–11), which identifies them as AIFC entities in any public registry search. Qualifying AIFC participants are exempt from corporate income tax (CIT) and VAT on income from approved financial services — a guarantee valid for 50 years under the Constitutional Statute on the AIFC. [6] Employees of AIFC participants are also exempt from personal income tax on employment income. However, exemptions are conditioned on genuine substantial presence within the AIFC perimeter in Astana; companies routing income through an AIFC shell without real operations face re-assessment at mainland rates (20% CIT, 16% VAT). [7]
When a Kazakhstani company imports services from a Russian or other EAEU supplier, which identifier — IIN or BIN — must appear on the self-assessed VAT declaration?
Under the EAEU Treaty, the place of supply for most cross-border services (consulting, software licensing, marketing, IP royalties) is determined by the buyer's location, so a Kazakhstani business importing such services from Russia, Belarus, Armenia, or Kyrgyzstan must self-assess Kazakhstani VAT at 16% on the payment. [2] The buyer files Form 328.00 (VAT return for imported services) using its own BIN if it is a legal entity (ТОО, JSC, branch), or its IIN if it is a sole entrepreneur (ИП). Returns and payment are due by the 25th of the month following the quarter of receipt. A common compliance gap: sole entrepreneurs on the simplified tax regime who import EAEU services below the VAT registration threshold still owe this self-assessed VAT — the simplified regime exemption does not cover import-of-services obligations. [5]
Kazakhstan requires crypto miners to sell 75% of mined assets on AIFC exchanges — how does this interact with corporate BIN registration and income tax obligations?
Since 1 January 2025, legal entities engaged in digital asset mining must sell at least 75% of mined digital assets exclusively through AIFC-licensed exchanges; circulation outside the AIFC is prohibited. Mining entities must be incorporated as legal entities (ТОО or JSC) and registered with the State Revenue Committee, which generates a BIN as the primary tax identifier. [2] The BIN must appear on electricity consumption reports: miners pay a dedicated electricity tax of KZT 2 per kilowatt-hour (KZT 1/kWh for renewable or off-grid generation). Mining income is recognized for CIT at the time assets are distributed from the mining pool. Individual traders who buy and sell digital assets via AIFC platforms report capital gains on personal income tax returns using their IIN. A 2024 tax audit uncovered 4.3 billion tenge in unreported personal income tax from digital asset sales. [4]
A foreign company director needs an IIN to open a corporate bank account in Kazakhstan — but IIN issuance at embassies was suspended. What are the current options?
This is a documented structural blocker. From 1 January 2025, Kazakhstan suspended the pilot project that allowed IIN issuance through its overseas embassies and consulates. The suspension affected most categories of applicants; however, from 18 April 2025, IINs may again be issued abroad to a limited set including: foreign investors, directors of registered foreign entities, digital nomad visa applicants, and persons with disabilities or aged 65+. [8] The standard path for most foreign directors is to visit a Kazakhstan Public Service Centre (PSC) in person with a valid foreign passport. The AIFC's e-IIN (issued under the AIFC e-Residency program) is not interchangeable with the state IIN and cannot be used for dealings with general government agencies — it is valid only within the AIFC ecosystem. [8]
Related Resources
- Russia TIN (INN) Guide — Russia uses the same INN acronym for its taxpayer number; useful for businesses operating across both EAEU member states.
- Kyrgyzstan TIN Guide — Another EAEU member; relevant when reverse-charge VAT applies on cross-border service imports.
- Uzbekistan TIN Guide — Neighboring Central Asian jurisdiction with similar digital economy tax developments.
- Azerbaijan TIN (VOEN) Guide — Caspian neighbor; also uses a structured identifier with entity-type encoding.
- E-Invoicing Country Requirements — Comparative overview of mandatory e-invoicing across multiple jurisdictions.
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