Cuba Tax ID Guide — Carné de Identidad (CI) and NIT Explained
Cuba's Tax Identifiers
Cuba operates two distinct identification numbers relevant to tax compliance: the Carné de Identidad (CI), a universal national identity document used as the base identifier for natural persons, and the Número de Identificación Tributaria (NIT), issued by ONAT (Oficina Nacional de Administración Tributaria) to registered taxpayers — both individuals and legal entities. Foreign companies and representative offices conducting economic activity in Cuba must obtain a NIT before remitting any tax to ONAT. Cuba's tax identifiers are also listed in the worldwide directory of VAT and tax ID names.
Carné de Identidad (CI)
The CI is Cuba's national identity document, issued by the Ministerio del Interior (MININT). It serves as the base identifier for natural persons in the tax system: self-employed workers (TCP) and individual partners in MIPYMEs use their CI number to initiate ONAT registration.
CI Format — 11 Digits
The CI comprises exactly 11 digits, each group encoding specific biographical data:
| Digit positions | Encoding |
|---|---|
| 1–6 | Date of birth: YYMMDD (first two digits = birth year) |
| 7 | Century of birth: 9 = 19th century; 0–5 = 20th century; 6–8 = 21st century |
| 8–9 | Sequential two-digit number (00–99) to prevent duplicates within same birth date |
| 10 | Gender: even digit = male; odd digit = female |
| 11 | Check digit (single control digit, 0–9) |
Example structure: A CI beginning with 861205 encodes a birth date of 5 December 1986. The seventh digit 0 confirms the 20th century.
Validation: The python-stdnum library (stdnum.cu.ni) validates the CI by checking length (11 digits), numeric format, and whether digits 1–6 represent a valid calendar date. No published weight-based checksum algorithm is documented in official sources for the check digit; validation implementations rely on date-validity as the primary integrity check.
Número de Identificación Tributaria (NIT)
The NIT is Cuba's formal taxpayer number, issued by ONAT upon registration. It is required on all tax filings, invoices, remittances, and communications with the tax authority. Both natural persons (individuals) and legal persons (companies, cooperatives, joint ventures) receive a NIT after completing registration.
The RC-05 — the physical taxpayer identification card issued alongside the NIT — carries a 16-digit barcode number. This barcode is a separate code required specifically to activate access to ONAT's online Portal Tributario. When logging in for the first time, taxpayers must enter both their NIT and the 16-digit RC-05 barcode number.
Who Registers and How
| Entity type | Registration route |
|---|---|
| TCP (self-employed workers) | In person at the municipal ONAT office corresponding to the address on the CI, within 15 calendar days of receiving the activity licence |
| MIPYMEs and CNAs (non-agricultural cooperatives) | Digitally via the Economic Actors Platform (PAE) at pae.mep.gob.cu — ONAT auto-processes registration within 10 business days |
| Artists, designers, social communicators | In person at municipal ONAT offices |
| Foreign representative offices / branches | In person at ONAT, with stamp duties of 750 Cuban pesos |
ONAT Portal Tributario
Once registered, taxpayers can access recurring obligations online at onat.gob.cu:
- View the Fiscal Vector — the personalised schedule of tax payment obligations
- File the annual Declaración Jurada (requires an electronic signature since Resolution 8 of 2024 for online submission at djutilidades.onat.gob.cu)
- Request suspension of monthly quotas during low-activity periods
- Make tax payments via Transfermovil (Cuba's mobile payment app), which carries a 3% discount on amounts owed
Common portal error: Users who already have a portal account and attempt to re-register see the message "El campo NIT debe ser único" (Your NIT must be unique). This is not a data error — it means the account already exists. The fix is to dismiss the registration screen, return to the login page, and enter the NIT and password directly. For genuine NIT-not-found errors (ONAT did not yet transmit the record), taxpayers should email [email protected] with their NIT, RC-05 barcode number, name, province, and municipality to request manual verification.
Annual Declaración Jurada — Deadlines and Penalties
The annual tax return campaign (Declaración Jurada) covers TCP workers, MIPYME partners, artists, usufructuary landowners, and other natural persons — even where no profit was earned during the fiscal year.
| Date | Event |
|---|---|
| 5 January | Campaign opens |
| 28 February | Deadline for 5% tax bonus (file and pay in full by this date) |
| 28 February | Additional 3% discount for payment via electronic channels |
| 30 April | Final filing deadline |
Missing the 30 April deadline triggers fines under Ley 113 of the Cuban Tax System ranging from 50 to 5,000 Cuban pesos, plus surcharges on unpaid principal. Persistent non-compliance escalates to activity licence withdrawal, business closure, asset embargo, or a criminal complaint for tax evasion carrying one to three years' imprisonment.
Under Law 174/2024 (State Budget for 2025), personal income tax for high-earning TCP and MIPYME workers rises to a maximum marginal rate of 50%, applied on a progressive scale set by Article 65 of that law.
Foreign Investment: Corporate Tax and Withholding
Joint ventures and International Economic Associations (EAIs) approved under Law 118 (Foreign Investment Act, 2014) benefit from:
- 15% corporate income tax on net taxable profit (versus 35% for wholly foreign-owned entities)
- Eight-year corporate tax exemption from the date of authorisation
Despite these preferences, when a joint venture or EAI pays foreign suppliers for services or products sourced abroad, it must withhold 4% of the contract price and remit it to ONAT before the payment is transferred. This withholding is separate from the corporate tax preference and routinely catches foreign counterparties off-guard when their invoice is settled short. The joint venture's NIT must appear on all withholding remittance documentation.
OFAC Sanctions and Tax Payment Conflicts
Cuba requires all businesses — including foreign-capital entities — to hold a fiscal bank account at a Cuban state bank and to route tax payments to ONAT through that institution. Because Cuban state banks are subject to US Office of Foreign Assets Control (OFAC) jurisdiction, US-nexus companies (or any entity routing US dollar payments through US correspondent banks) face a direct legal conflict: complying with ONAT's payment obligation may constitute a prohibited transaction under the Cuban Assets Control Regulations, 31 CFR Part 515. Non-US companies using dollar-clearing corridors through US correspondent banks face the same risk of automatic transaction blocking. Entities in this position should obtain a specific OFAC licence before making any payment that transits the Cuban financial system.
Frequently Asked Questions
Why does the ONAT portal say "El campo NIT debe ser único" when I try to register — is my NIT corrupted?
No. This message — which translates as "Your NIT must be unique" — appears when you already have a portal account and are attempting a second registration with the same NIT. Cancel the registration flow, return to the portal login screen at onat.gob.cu, enter your NIT and password, and click Aceptar. If you genuinely cannot log in and are certain your account does not exist, email [email protected] with your NIT, 16-digit RC-05 barcode, full name, province, and municipality for manual lookup by ONAT staff. [1] [2]
MIPYMEs previously had a tax-free startup grace period — does that still apply in 2024 and beyond?
No. Resolutions 306 and 307 of 2023 from Cuba's Ministry of Finance and Prices eliminated the six-month to one-year tax exemption that MIPYMEs previously enjoyed during their incorporation phase. All taxes apply from day one of authorised operation. Registration itself is handled digitally via the Economic Actors Platform (PAE), not directly at ONAT, and ONAT completes the NIT issuance within ten business days of receiving the PAE file. [3] [4]
The Declaración Jurada deadline is April 30 — what exactly happens if a TCP worker files in March but pays in May?
Filing on time without paying on time triggers surcharges on the unpaid principal under Ley 113 of the Cuban Tax System; the filing penalty and the payment penalty are assessed separately. By contrast, filing and paying by 28 February earns a 5% bonus on the amount owed, and paying by any electronic channel (including Transfermovil) adds a further 3% discount. Repeated or wilful non-payment can lead to licence withdrawal, business closure, asset embargo, or a criminal tax evasion complaint carrying one to three years' imprisonment. [5] [6]
My foreign company signed a services contract with a Cuban joint venture — why did we receive less than the invoiced amount?
Cuba's withholding tax regime requires joint ventures and International Economic Associations (EAIs) approved under Law 118 to withhold 4% of the gross contract price on all payments for services or goods sourced from abroad, remitting this amount to ONAT before the payment is transferred. This obligation applies regardless of the 15% reduced corporate income tax rate the joint venture itself enjoys. The joint venture's NIT must appear on all withholding remittance paperwork. Request a withholding certificate (comprobante de retención) from the joint venture before reconciling the short payment on your end. [7] [8]
Can a company that uses US dollar correspondent banking hold a Cuban NIT and legally pay ONAT?
This is a documented conflict. Cuba mandates that all businesses — including foreign-capital entities — hold a fiscal bank account at a Cuban state bank and route all ONAT payments through it. Cuban state banks are blocked entities under OFAC jurisdiction. Any payment that transits a Cuban state bank may constitute a prohibited transaction under the Cuban Assets Control Regulations, 31 CFR Part 515, for US-nexus entities or any party whose payment clears through a US correspondent bank. Companies in this situation must obtain a specific OFAC licence before making any tax payment into the Cuban financial system. Failure to do so exposes both the paying entity and any US correspondent bank to civil penalties. [9] [10]
From 2025, how high can personal income tax go for a TCP or MIPYME worker, and what triggers the top rate?
Under Law 174/2024 (Cuba's 2025 State Budget Law), personal income tax for self-employed workers, TCP, and MIPYME workers follows a progressive scale established in Article 65, with a maximum marginal rate of 50% applicable to high earners. The exact bracket thresholds are denominated in Cuban pesos (CUP) and are set in the Official Gazette. The 2025 Declaración Jurada campaign uses this new scale; workers who previously paid fixed low-rate quotas may now owe a reconciliation amount when filing. Filing and paying by 28 February still earns the 5% bonus on the calculated liability. [11] [12]
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Related Resources
- Colombia Tax ID Guide — NIT structure and e-invoicing obligations in a comparable Latin American system
- Mexico Tax ID Guide — RFC format and SAT registration for comparison
- Venezuela Tax ID Guide — RIF number and SENIAT registration for the neighboring Caribbean economy
- Argentina Tax ID Guide — CUIT/CUIL structure and AFIP compliance
- Worldwide Tax Rates — Compare Cuba's corporate tax rates against other countries' CIT rates
