Albania
Albania NIPT/NUIS format, validation algorithm, registration steps, Fiskalizimi requirements, and cross-border VAT obligations for foreign businesses.
Andorra
Complete guide to Andorra's NRT tax number — format, prefix letters, IGI registration thresholds, and banking rules for foreign companies. Validate in 100+ countries.
Angola
Angola's tax ID explained — the NIF issued by the AGT, why a citizen's NIF is their Bilhete de Identidade number, the IVA regimes and their Kz 25 million and Kz 350 million thresholds, e-invoicing dates, non-resident rules and how to check a NIF.
Anguilla
Complete guide to Anguilla's Tax Identification Number (TIN) — format, registration, GST obligations, economic substance requirements, and compliance traps for businesses and individuals.
Argentina
Complete guide to Argentina's CUIT tax identification number — format, checksum algorithm, CUIL vs CDI differences, Monotributo thresholds, e-invoice types, and ARCA registration for foreigners.
Armenia
Complete guide to Armenia's 8-digit Taxpayer Identification Number (TIN)- format, checksum validation, registration for foreigners, SRC portal, VAT obligations, and compliance rules.
Aruba
Complete guide to Aruba's persoonsnummer (TIN)- 8-digit format, DIMP registration steps, BBO turnover tax obligations for foreign businesses, and free zone rules.
Australia
Complete guide to Australia's ABN and TFN — format specs, mod-89 checksum algorithm, GST registration thresholds, PAYG withholding rules, and digital services obligations for non-residents.
Austria
Complete guide to Austria's tax identification numbers — UID (ATU format), Abgabenkontonummer, and Firmenbuchnummer. Covers format, ATU regex, VIES validation, registration for foreign businesses, and compliance rules.
Azerbaija
Complete guide to Azerbaijan's 10-digit VOEN (TIN)- format structure, checksum validation, registration for foreigners, e-invoicing obligations, and VAT rules for digital services.
Bahrain
Bahrain's tax IDs explained — the 15-digit NBR VAT account number, the CR number and its branch suffix, the BHD 37,500 registration threshold, non-resident rules and how to check a number.
Bangladesh
Complete guide to Bangladesh TIN (12-digit e-TIN) and BIN (13-digit e-BIN) — formats, registration, compliance rules, and how to verify on the NBR portal.
Barbados
Complete guide to the Barbados 13-digit TIN issued by the Barbados Revenue Authority through TAMIS. Covers format, registration, VAT obligations, corporate tax rates, withholding tax, and Tax Clearance Certificates.
Belarus
Complete guide to the Belarus UNP (Unified Number of Payer) — 9-character format, regional codes, EGR verification, ESCHF invoice rules, digital services VAT, and HTP tax regime.
Belgium
Complete guide to Belgian tax identifiers — Numéro National (NN), Ondernemingsnummer (KBO/BCE), and BTW/TVA number format with mod-97 checksum, BIS number for non-residents, and 2026 e-invoicing mandate.
Belize
Complete guide to the Belize 7-digit Tax Identification Number (TIN) issued by the Belize Tax Service. Covers format, registration via IRIS portal, IBC obligations, GST thresholds, withholding tax, and the 2026 importer mandate.
Bolivia
Complete guide to Bolivia's NIT (Número de Identificación Tributaria) — format, digit structure, registration requirements for foreigners, NIT verification, IVA rules, and SFE electronic invoicing compliance.
Bosnia and Herzegovina
Bosnia and Herzegovina's tax IDs explained — the 13-digit JIB issued by the entity tax administrations, the 12-digit PDV (VAT) number the Indirect Taxation Authority derives from it, what the digits mean, the BAM 100,000 VAT threshold, e-invoicing plans and how to check a number.
Brazil
Complete guide to Brazil's CPF (individual) and CNPJ (company) tax IDs — formats, mod-11 checksum, the July 2026 alphanumeric CNPJ change, NF-e invoicing, and MEI compliance.
Brunei Darussalam
Complete guide to Brunei Darussalam tax identification — NRIC for individuals, ROCBN registration numbers for companies (P-, RC-, RFC-prefix), corporate tax rules, withholding rates, and CRS compliance.
Bulgaria
Complete guide to Bulgaria's tax identification numbers — EGN (10-digit personal number), EIK/BULSTAT (9 or 13-digit business number), and VAT number formats. Covers checksum validation, registration rules, and withholding tax obligations.
Burundi
Burundi's tax ID explained — the NIF issued by the Office Burundais des Recettes for all taxes, who must register and by when, the BIF 25 million VAT threshold, registration through e-KORI, EBMS e-invoicing and how to check a NIF.
Canada
Complete guide to Canadian tax identifiers — Social Insurance Number (SIN), Business Number (BN) with RT/RP/RC suffixes, Individual Tax Number (ITN), GST/HST, and QST formats. Includes Luhn checksum, registration rules, and non-resident obligations.
Chile
Complete guide to Chile's RUT tax identification number — mod-11 checksum, RUT vs RUN differences, DTE e-invoice rules, digital VAT registration for foreign providers, and SII compliance obligations.
China
Complete guide to China's tax identification numbers — the 18-character USCC for businesses and the 18-digit Resident ID for individuals, including format, verification, and compliance requirements.
Colombia
Complete guide to Colombia's NIT tax identification number — 9+1 digit format, mod-11 check digit calculation, RUT registration for foreigners, factura electrónica penalties, and PES obligations for digital service providers.
Cook Islands
Complete guide to the Cook Islands RMD number — format, registration steps using forms RM1/RM2, VAT thresholds, CRS reporting obligations, and penalty rules for international companies.
Costa Rica
Complete guide to Costa Rica tax identification numbers — Cédula de Persona Física, Cédula Jurídica, DIMEX, and NITE formats, validation, and TRIBU-CR verification.
Croatia
Complete guide to Croatia's OIB (Osobni identifikacijski broj) — 11-digit format, ISO 7064 Mod 11,10 checksum, PDV-ID, VAT registration for foreigners, Fiscalization 2.0, and compliance requirements.
Cuba
Complete guide to Cuba's tax identifiers — the 11-digit Carné de Identidad (CI) for individuals and the NIT issued by ONAT for taxpayers. Covers format, checksum, MIPYME registration, Declaración Jurada deadlines, OFAC conflicts, and the ONAT portal login process.
Curaçao
Everything businesses and individuals need to know about the Curaçao CRIB number (Persoonsnummer) — registration, invoicing requirements, OB filing thresholds, profit tax rates, and customs obligations.
Cyprus
Complete guide to the Cyprus Tax Identification Code (TIC) — format rules, TFA portal registration, VAT obligations, and compliance traps for individuals, companies, and non-residents.
Czechia
The Czech DIČ explained — CZ plus an IČO, rodné číslo or special identifier, the birth-number check digit, the 2024 sole-trader change, the CZK 2 million VAT threshold and how to verify a number.
Denmark
Complete guide to Danish tax identification numbers — CPR (DDMMYY-SSSC, mod-11 exceptions), CVR/SE (8-digit, mod-11), format rules, registration for foreigners, and NemHandel e-invoicing obligations.
Dominica
Complete guide to the Dominica 7-digit TIN issued by the Inland Revenue Division (IRD). Covers TIN format, SIGTAS registration, VAT thresholds, withholding tax, IBC abolishment, CBI tax residency, and CRS/AEOI obligations.
Ecuador
Complete guide to Ecuador's RUC tax identification number — 13-digit format for individuals and companies, RIMPE categories, IVA at 15%, SRI electronic invoicing rules, and obligations for foreign digital service providers.
Egypt
Egypt Tax Registration Number (TRN) guide — 9-digit format, ETA e-invoicing rules, UIN validation, VAT thresholds, and compliance requirements for businesses operating in Egypt.
El Salvador
Complete guide to El Salvador's NIT (tax ID), NRC (IVA contributor number) and DUI unification — formats, registration, DTE e-invoicing, and withholding rules for foreign businesses.
Estonia
Learn about TIN number in Estonia. Use Lookuptax for hassle-free tax id validation in Estonia and other 100+ countries
Faroe Islands
Complete guide to P-tal (personal number) and V-tal (business VAT number) in the Faroe Islands — format, registration, foreign worker rules, and MVG compliance for businesses.
Finland
Learn about TIN number in Finland. Use Lookuptax for hassle-free tax id validation in Finland and other 100+ countries
France
Learn about TIN number in France. Use Lookuptax for hassle-free tax id validation in France and other 100+ countries
Georgia
Complete guide to Georgia's tax identification numbers — 11-digit personal number for citizens, 9-digit TIN for foreigners and legal entities, VAT obligations, Virtual Zone status, and Revenue Service registration.
Germany
Complete guide to Germany's four tax ID numbers — Steuer-ID (IdNr), Steuernummer, USt-IdNr and W-IdNr. Formats, invoice rules, e-invoicing deadlines, and VAT registration for non-residents.
Ghana
Comprehensive guide to Ghana's TIN and Ghanacard PIN — format, registration for foreigners, e-VAT invoice requirements, withholding tax rates, and GRA verification.
Gibraltar
Gibraltar's Taxpayer Reference Number (TRN) is a 6-digit numeric identifier issued by the Income Tax Office to individuals and companies. Learn the format, registration process, eGov portal access, and cross-border compliance rules.
Greece
Complete guide to Greece's AFM tax identification number and FPA VAT number — format, 9-digit checksum, VIES EL prefix, non-resident registration, myDATA e-invoicing penalties, and digital nomad tax rules.
Greenland
Complete guide to Greenland tax identification numbers — CPR (DDMMYY-XXXX, 10 digits) for individuals and GER (8-digit) for legal entities, registration requirements, foreign worker rules, and withholding tax obligations.
Grenada
Complete guide to Grenada TIN numbers issued by the Inland Revenue Division. Covers the 6-digit format, G-TAX online portal, CAIPO registration sequence for foreign companies, VAT threshold, withholding tax, and Tax Clearance Certificates.
Guatemala
Guide to Guatemala's NIT and CUI tax identification numbers — NIT and CUI formats and check digits, NITs formed from the CUI since October 2023, FEL e-invoicing obligations, and registration for foreigners.
Guernsey
Complete guide to Guernsey tax identification numbers — Social Insurance numbers (GY prefix), company registration numbers, tax reference numbers, and Pillar Two obligations for MNEs.
Hong Kong
Complete guide to Hong Kong Tax Identification Numbers — HKID format, check-digit algorithm, BR number (8-digit BRN), UBI reform, eTAX login TIN confusion, and verification tools.
Hungary
Complete guide to Hungary's two tax identifiers — the personal adóazonosító jel (10 digits) and the entity adószám (HU + 8 digits). Covers registration, the VAT-code digit, RTIR/Online Számla compliance, EKAER, and fiscal representation rules for foreign businesses.
Iceland
Complete guide to Iceland's kennitala (TIN) and VSK-nr (VAT number) — 10-digit format, checksum algorithm, company registration, and VAT obligations for foreign businesses.
India
Complete guide to India's three tax identifiers — PAN (income tax), TAN (TDS/TCS deduction), and GSTIN (GST). Covers format breakdowns, entity codes, OIDAR registration, e-invoice IRN rules, and TDS treaty overrides.
Indonesia
Complete guide to Indonesia's NPWP tax ID — 15-to-16-digit migration, NIK integration for individuals, NITKU for branches, PMSE VAT for foreign digital services, and e-Faktur compliance.
Ireland
Complete guide to Irish tax identifiers — Personal Public Service Number (PPSN), Tax Registration Number (TRN), VAT number (IE prefix), and CHY charity number. Formats, registration, and compliance for residents and foreign businesses.
Isle of Man
Isle of Man tax IDs explained — the Tax Reference Number (H, C or X plus six digits), National Insurance numbers, GB VAT numbers beginning 00, Companies Registry numbers, the £90,000 VAT threshold and how to check each one.
Israel
Complete guide to Israeli tax identification numbers — Teudat Zehut (personal ID), H.P. company number, Osek Murshe VAT registration, and the e-invoicing allocation number (mispar haktzaat). Includes foreign business obligations.
Italy
Complete guide to Italy's two tax identifiers — Codice Fiscale (16-character personal TIN) and Partita IVA (11-digit VAT number). Formats, registration, verification, e-invoicing, and compliance for residents and foreign businesses.
Jamaica
Complete guide to Jamaica's 9-digit Taxpayer Registration Number (TRN) issued by Tax Administration Jamaica (TAJ). Covers format, registration, GCT obligations, withholding tax, and RAiS portal compliance.
Japan
Format specs, validation rules, and compliance guide for Japan's Individual Number (My Number) and Corporate Number — with official NTA portal links.
Jersey
Complete guide to Jersey tax identification numbers — social security numbers (JY prefix), tax reference numbers (CC00000 format), GST registration for overseas retailers, economic substance obligations, and CRS reporting requirements.
Kazakhstan
Complete guide to Kazakhstan's 12-digit IIN (individuals) and BIN (businesses) - format structure, checksum validation, registration for foreigners, IS ESF e-invoicing, and VAT rules for digital services.
Kenya
Complete guide to Kenya's KRA Personal Identification Number (PIN) — format, registration for foreigners, eTIMS e-invoicing obligations, Significant Economic Presence tax, and withholding tax rates.
Korea
Complete guide to South Korea's three tax identification numbers — the 13-digit RRN for individuals, 10-digit BRN for businesses, and 13-digit CRN for legal entities — with format specs, NTS verification links, and compliance rules.
Kuwait
Complete guide to Kuwait tax identifiers — Civil ID (12 digits, PACI-issued) and entity TIN (6 digits, Ministry of Finance). Covers registration, 5% tax retention, DMTT, Zakat obligations, and permanent establishment risk for foreign companies.
Kyrgyzstan
Complete guide to Kyrgyzstan's 14-digit INN (taxpayer number) and PIN (personal identifier)- format, ESF e-invoice rules, VAT registration for foreign digital service providers, and EAEU trade compliance.
Latvia
Complete guide to Latvia's two tax identifiers — Personas kods (11-digit personal TIN) and PVN number (LV + 11 digits). Formats, formats since 2017 reform, VAT registration, e-invoicing, and compliance for residents and foreign businesses.
Lebanon
Complete guide to Lebanon's Tax Identification Number (TIN) — numeric serial format for individuals, entity suffixes -601/-603/-604, VAT registration threshold, non-resident withholding tax, and compliance requirements for businesses operating in Lebanon.
Liberia
Liberia's tax ID explained — the 9-digit TIN beginning with 5, who issues it to individuals and to businesses, the move from GST to 15% VAT and its USD 20,000 threshold, TIN rules for invoices and how to check a TIN.
Liechtenstein
Complete guide to Liechtenstein's tax identifiers — PEID Nummer format (4–12 digits), FL-Steuernummer for income tax, FL-UID for MWST invoices, and the eMWST portal requirement from January 2025.
Lithuania
Complete guide to Lithuania's tax identifiers — Asmens Kodas (11-digit personal code), Juridinio asmens kodas (9-digit company code), and PVM mokėtojo kodas (LT + 9 or 12 digits VAT number). Formats, registration, verification, and compliance for residents and foreign businesses.
Luxembourg
Complete guide to Luxembourg tax identifiers — 13-digit matricule for natural persons, 11-digit national identifier for companies, and LU-prefix TVA number. Formats, registration, VIES checks, and compliance for residents and foreign businesses.
Macao
Complete guide to Macao's taxpayer numbers — 8-digit individual and entity formats, DSF registration, complementary tax Groups A and B, non-resident tax agent rules under Law 24/2024, and professional tax withholding.
Macedonia
Complete guide to North Macedonia's tax identifiers — EMBG (13-digit personal number), EDB (13-digit business TIN), and DDV VAT number with MK prefix. Covers registration, e-Faktura mandate, withholding tax, and compliance for foreign businesses.
Malaysia
Complete guide to Malaysia's Tax Identification Number (TIN) — IG-prefix individual format, entity codes, MyKad NRIC, SST registration, and MyInvois e-Invoice rules. Includes FAQ with official LHDN citations.
Maldives
Complete guide to Maldives Tax Identification Numbers (TINs) issued by MIRA. Covers TIN format, GST and Green Tax registration, non-resident withholding obligations, and digital-services rules effective July 2025.
Malta
Learn about TIN number in Malta. Use Lookuptax for hassle-free tax id validation in Malta and other 100+ countries
Marshall Islands
Learn about TIN number in Marshall Islands. Use Lookuptax for hassle-free tax id validation in Marshall Islands and other 100+ countries
Mauritius
Learn about TIN number in Mauritius. Use Lookuptax for hassle-free tax id validation in Mauritius and other 100+ countries
Mexico
Learn about TIN number in Mexico. Use Lookuptax for hassle-free tax id validation in Mexico and other 100+ countries
Moldova
Learn about TIN number in Moldova. Use Lookuptax for hassle-free tax id validation in Moldova and other 100+ countries
Monaco
Learn about TIN number in Monaco. Use Lookuptax for hassle-free tax id validation in Monaco and other 100+ countries
Mongolia
Mongolia's tax IDs explained — the taxpayer number issued by the tax administration, the citizen and legal-entity register numbers, the VAT threshold rising from MNT 50 million to MNT 400 million in 2027, e-barimt receipts and how to check a VAT payer.
Montenegro
Learn about TIN number in Montenegro. Use Lookuptax for hassle-free tax id validation in Montenegro and other 100+ countries
Morocco
Learn about TIN number in Morocco. Use Lookuptax for hassle-free tax id validation in Morocco and other 100+ countries
Nauru
Learn about TIN number in Nauru. Use Lookuptax for hassle-free tax id validation in Nauru and other 100+ countries
Netherlands
Learn about TIN number in Netherlands. Use Lookuptax for hassle-free tax id validation in Netherlands and other 100+ countries
New Zealand
Learn about TIN number in New Zealand. Use Lookuptax for hassle-free tax id validation in New Zealand and other 100+ countries
Nicaragua
Learn about TIN number in Nicaragua. Use Lookuptax for hassle-free tax id validation in Nicaragua and other 100+ countries
Nigeria
Learn about the Tax ID (formerly TIN) in Nigeria — the 13-digit Tax ID issued from 1 January 2026, how it links to the NIN and CAC number, and how to retrieve it. Use Lookuptax for hassle-free tax id validation in Nigeria and other 100+ countries
Northern Ireland
Learn about TIN number in Northern Ireland. Use Lookuptax for hassle-free tax id validation in Northern Ireland and other 100+ countries
Norway
Learn about TIN number in Norway. Use Lookuptax for hassle-free tax id validation in Norway and other 100+ countries
Oman
Learn about TIN number in Oman. Use Lookuptax for hassle-free tax id validation in Oman and other 100+ countries
Pakistan
Learn about TIN number in Pakistan. Use Lookuptax for hassle-free tax id validation in Pakistan and other 100+ countries
Panama
Learn about TIN number in Panama. Use Lookuptax for hassle-free tax id validation in Panama and other 100+ countries
Paraguay
Learn about TIN number in Paraguay. Use Lookuptax for hassle-free tax id validation in Paraguay and other 100+ countries
Peru
Learn about TIN number in Peru. Use Lookuptax for hassle-free tax id validation in Peru and other 100+ countries
Philippines
Learn about TIN number in Philippines. Use Lookuptax for hassle-free tax id validation in Philippines and other 100+ countries
Poland
Learn about TIN number in Poland. Use Lookuptax for hassle-free tax id validation in Poland and other 100+ countries
Portugal
Learn about TIN number in Portugal. Use Lookuptax for hassle-free tax id validation in Portugal and other 100+ countries
Qatar
Learn about TIN number in Qatar. Use Lookuptax for hassle-free tax id validation in Qatar and other 100+ countries
Romania
Learn about TIN number in Romania. Use Lookuptax for hassle-free tax id validation in Romania and other 100+ countries
Russia
Learn about TIN number in Russia. Use Lookuptax for hassle-free tax id validation in Russia and other 100+ countries
Saint Kitts and Nevis
Learn about TIN number in Saint Kitts and Nevis. Use Lookuptax for hassle-free tax id validation in Saint Kitts and Nevis and other 100+ countries
Saint Lucia
Learn about TIN number in Saint Lucia. Use Lookuptax for hassle-free tax id validation in Saint Lucia and other 100+ countries
Samoa
Learn about TIN number in Samoa. Use Lookuptax for hassle-free tax id validation in Samoa and other 100+ countries
San Marino
Learn about TIN number in San Marino. Use Lookuptax for hassle-free tax id validation in San Marino and other 100+ countries
Saudi Arabia
Learn about TIN number in Saudi Arabia. Use Lookuptax for hassle-free tax id validation in Saudi Arabia and other 100+ countries
Serbia
Learn about TIN number in Serbia. Use Lookuptax for hassle-free tax id validation in Serbia and other 100+ countries
Seychelles
Learn about TIN number in Seychelles. Use Lookuptax for hassle-free tax id validation in Seychelles and other 100+ countries
Singapore
Learn about TIN number in Singapore. Use Lookuptax for hassle-free tax id validation in Singapore and other 100+ countries
Sint Maarten
Learn about TIN number in Sint Maarten. Use Lookuptax for hassle-free tax id validation in Sint Maarten and other 100+ countries
Slovakia
Learn about TIN number in Slovakia. Use Lookuptax for hassle-free tax id validation in Slovakia and other 100+ countries
Slovenia
Slovenia's tax numbers explained — the 8-digit davčna številka, the SI VAT ID, the AJPES matična številka and EMŠO — with formats, mod-11 check digits, VAT thresholds and lookups.
South Africa
South Africa's tax numbers explained — SARS income tax reference number, VAT number, PAYE/SDL/UIF references, CIPC company number — with formats, the SARS check digit and lookups.
Spain
Spain's NIF explained — DNI, NIE, K/L/M and company NIF (formerly CIF) formats, the mod-23 check letter, the ES NIF-IVA and ROI, no VAT threshold, modelo 036 and official lookups.
St Vincent and the Grenadines
Learn about TIN number in St Vincent and the Grenadines. Use Lookuptax for hassle-free tax id validation in St Vincent and the Grenadines and other 100+ countries
Sweden
Sweden's tax IDs explained — personnummer, samordningsnummer, organisationsnummer and the SE…01 VAT number — with formats, the Luhn check digit, F-skatt, the SEK 120,000 threshold and lookups.
Switzerland
Learn about UID number in Switzerland. Use Lookuptax for hassle-free tax id validation in Switzerland and other 100+ countries
Taiwan
Taiwan's tax IDs explained — the 8-digit Business Administration Number (統一編號) and its divisible-by-5 check, the national ID and UI number formats, who registers for business tax, the NT$600,000 cross-border threshold and lookups.
Thailand
Learn about MST number in Thailand. Use Lookuptax for hassle-free tax id validation in Thailand and other 100+ countries
Tunisia
Learn about MF number in Tunisia. Use Lookuptax for hassle-free tax id validation in Tunisia and other 100+ countries
Türkiye
Learn about VKN number in Türkiye. Use Lookuptax for hassle-free tax id validation in Türkiye and other 100+ countries
United Arab Emirates
Learn about TRN number in United Arab Emirates. Use Lookuptax for hassle-free tax id validation in United Arab Emirates and other 100+ countries
Uganda
Uganda's tax identification numbers explained — the 10-digit URA TIN, the switch to the NIN and URSB registration number, the UGX 300 million VAT threshold, EFRIS and how to check a TIN.
Ukraine
Ukraine's tax numbers explained — the 8-digit EDRPOU code, the 10-digit RNOKPP, the 12-digit VAT number (ІПН) and the 77/88 STS number — with the UAH 1 million threshold and official registers.
United Kingdom
Learn about VAT number in United Kingdom. Use Lookuptax for hassle-free tax id validation in United Kingdom and other 100+ countries
United States
Complete guide to US Taxpayer Identification Numbers — SSN, EIN, ITIN, ATIN, and PTIN. Formats, validation rules, and real-world compliance scenarios.
Uruguay
Learn about RUT number in Uruguay. Use Lookuptax for hassle-free tax id validation in Uruguay and other 100+ countries
Uzbekistan
Learn about VAT number in Uzbekistan. Use Lookuptax for hassle-free tax id validation in Uzbekistan and other 100+ countries
Venezuela
Learn about RIF number in Venezuela. Use Lookuptax for hassle-free tax id validation in Venezuela and other 100+ countries
Vietnam
Learn about MST number in Vietnam. Use Lookuptax for hassle-free tax id validation in Vietnam and other 100+ countries