Kazakhstan IBAN Format (KZ) — Structure, Length & Example

The Kazakhstan IBAN is 20 characters long and uses the country code KZ. Kazakhstan is Central Asia's largest economy, driven by oil, gas, and mineral exports. The National Bank of Kazakhstan mandated IBAN adoption to align the country's payment infrastructure with international standards and to streamline cross-border transactions. Kazakhstan is not a SEPA member; all international transfers use the SWIFT network. The official currency is the Kazakhstani tenge (KZT).

Kazakhstan IBAN at a Glance

• Country code: KZ
• Total length: 20 characters (always)
• Format: KZkk bbb ccccccccccccc
• BBAN length: 16 characters
• Character types: 3-digit bank code + 13-character alphanumeric account number
• SEPA member: No
• Currency: Kazakhstani tenge (KZT)

Kazakhstan IBAN Structure Explained

1. Country Code, KZ (2 characters)

The ISO 3166-1 alpha-2 code for Kazakhstan. Every Kazakhstani IBAN begins with KZ.

2. Check Digits, kk (2 digits)

Two decimal digits computed using the MOD-97 algorithm (ISO 7064). They detect transcription and transposition errors before the payment is transmitted.

3. Bank Code, bbb (3 digits)

A 3-digit numeric code identifying the bank. Major Kazakhstani banks and their codes:

• 601, Halyk Bank, the country's largest bank by assets and customer base, offering retail, SME, and corporate banking throughout Kazakhstan. Kazkommertsbank, historically one of Kazakhstan's largest banks, merged into Halyk in 2018.
• 722, Kaspi Bank, a leading digital bank and fintech operator with an extensive mobile-first customer base and e-commerce platform.
• 856, Bank CenterCredit, a commercial bank serving retail and SME customers.
• 998, Alatau City Bank (formerly Jusan Bank, renamed in June 2025), a commercial bank with a focus on corporate and investment banking.
• 551, Freedom Bank Kazakhstan, a digital bank within the Freedom Holding group.
• 965, ForteBank, a mid-tier commercial bank serving retail and corporate clients.
• 125, National Bank of Kazakhstan, the central bank; this code appears in correspondent-account IBANs.

4. Account Number, ccccccccccccc (13 alphanumeric characters)

A 13-character alphanumeric account number that can contain both uppercase letters and digits. This is a distinctive feature of the Kazakhstani IBAN, unlike most European IBANs, the account number field is not purely numeric. Leading characters are significant and must be preserved exactly as given.

Kazakhstan IBAN Example Explained

KZ86 125K ZT50 0410 0100

This is an example IBAN for illustrative purposes only. Do not use for real transfers.

• Country: KZ (Kazakhstan)
• Check digits: 86
• Bank code: 125 (National Bank of Kazakhstan, a correspondent-account IBAN)
• Account number: KZT5004100100 (13 alphanumeric characters)

Validate any Kazakhstani IBAN at the ibanchecker.cash IBAN validator, or see the full format specification at /iban-format/kz.

How Kazakhstan IBAN Validation Works

1. Country code check: The first two characters must be exactly KZ.
2. Length check: The IBAN must be exactly 20 characters after removing all spaces.
3. Character type check: Positions 5–7 must be digits (bank code); positions 8–20 can be uppercase letters or digits (alphanumeric account number).
4. MOD-97 check: Move the first four characters to the end, replace K=20, Z=35, and any letters in the account field with their numeric values (A=10 … Z=35), then divide by 97. A valid IBAN yields a remainder of 1.

Kazakhstan Is Not a SEPA Country

Kazakhstan is a member of the Eurasian Economic Union (EAEU) and the Commonwealth of Independent States (CIS), but has no connection to SEPA or European Union payment infrastructure. All international transfers use SWIFT. Practical implications:

• Transfers require both the 20-character IBAN and the BIC/SWIFT code of the receiving bank.
• Processing times are typically 2–4 business days; USD and EUR transfers are common given Kazakhstan's commodity trade.
• The National Bank of Kazakhstan may require documentation for large inbound transfers under currency control regulations.
• SEPA Credit Transfer and Direct Debit are not available for Kazakhstani accounts.

Look up Kazakhstani bank BIC codes using the ibanchecker.cash SWIFT directory.

Kazakhstan's Banking and Payment Infrastructure

The National Bank of Kazakhstan (NBK) oversees monetary policy and banking supervision. The Kazakhstan Interbank Settlement Center (KISC) operates the domestic real-time gross settlement system and retail payment infrastructure. Kazakhstan has a rapidly growing digital banking sector, with Kaspi Bank in particular achieving one of the highest mobile banking penetration rates in the region.

Kazakhstan's position on the Silk Road, bridging China, Russia, and Europe, makes it an important transit economy for trade finance. Payments related to oil exports, metal trading, and logistics frequently flow between European banks and Kazakhstani accounts, making reliable IBAN handling important for treasury and accounts payable teams.

The Alphanumeric Account Number: Key Difference

The most important technical distinction of the Kazakhstani IBAN is the alphanumeric account number. Payment systems that only accept digits in the BBAN field will reject valid Kazakhstani IBANs. This particularly affects:

• Legacy ERP systems with IBAN validation modules that assume numeric-only BBANs.
• Custom IBAN parsers written for European markets without Kazakhstani support.
• Some bank portals that perform client-side validation before submission.

Use the ibanchecker.cash IBAN format checker to verify that any Kazakhstani IBAN is correctly structured before submitting it to your payment system.

Common Kazakhstan IBAN Mistakes

Rejecting Letters in the Account Number

Systems that validate IBAN account fields as numeric-only will incorrectly reject valid Kazakhstani IBANs. The 13-character account number field is alphanumeric; this is by design and compliant with IBAN standards.

Wrong Total Length

The Kazakhstani IBAN is exactly 20 characters. A 22-character IBAN would belong to a different country. Any KZ IBAN with more or fewer than 20 characters is structurally invalid.

Omitting the BIC

Because Kazakhstan is outside SEPA, the BIC is mandatory for all international wire transfers. Providing only the IBAN without the BIC will typically result in the transfer being held, delayed, or returned.

Currency Control Documentation

While this does not affect IBAN validity, large inbound USD or EUR transfers to Kazakhstani accounts may require supporting documentation under National Bank of Kazakhstan currency control rules. Verify with the receiving bank before initiating large transfers.

Bulk Validation for Central Asian Payees

Finance teams making commodity payments, joint-venture distributions, or supplier payments to Kazakhstani counterparties can validate multiple IBANs at once using the ibanchecker.cash bulk checker. Upload a CSV of up to 100 IBANs for instant per-row validation with alphanumeric BBAN support.

Developers building payment platforms that handle Kazakhstani IBANs can integrate with the ibanchecker.cash API for real-time validation with full BBAN parsing, including the alphanumeric account number field.

Sources & References

• SWIFT IBAN Registry — Official IBAN country format specifications
• ISO 13616 — IBAN international standard
• National Bank of Kazakhstan — Official monetary authority and payment system regulator

Last updated: June 2026