LEI vs. DUNS vs. EIN: Understanding Corporate Identifiers

Compiled & reviewed by the EntityCodes Editorial Team (Tech Labs FZ LLC) · Data verified: 2026-06-28

Legal Entity Identifiers (LEI), DUNS numbers, and IRS Employer Identification Numbers (EIN) serve distinct regulatory and compliance roles.

Comparing Corporate Identifiers

Compliance officers must understand the differences between financial, commercial, and tax-related corporate identifiers:

LEI: A global financial marker standardized under ISO 17442. Used primarily to track security trades and international banking relationships ^[1].
DUNS: A proprietary commercial credit marker issued by Dun & Bradstreet, used to evaluate business credit history and commercial risk ^[2].
EIN: A federal tax identification number issued by the IRS, used primarily for domestic tax reporting, payroll, and banking ^{[irs-pba-instructions]}.

While U.S. government contracting systems transitioned from DUNS to GSA-owned Unique Entity IDs (UEI) in 2022, banks and international regulators still require LEI codes for trade reporting ^[2][1].

Global Financial Standards & LEI Mandates

To support the core compliance tasks detailed in this guide on LEI vs. DUNS vs. EIN: Understanding Corporate Identifiers, compliance officers and corporate attorneys must consult several international financial standards. Reference data for all active identifiers is published in the Global Legal Entity Identifier Foundation (GLEIF) GLEIF Golden Copy and Reference Data Registry. The code's alphanumeric structure is specified by the International Organization for Standardization (ISO) ISO 17442:2020 Financial services — Legal Entity Identifier (LEI), and its mathematical integrity is checked using the check digits standard International Organization for Standardization (ISO) ISO 7064:2003 Check character systems. The systemic oversight of these codes was established following the recommendation of the Financial Stability Board (FSB) LEI Governance and Implementation Progress Reports. Swap trade reporting regulations require active codes under the Commodity Futures Trading Commission (CFTC) Swap Data Recordkeeping and Reporting Requirements (LEI Mandate). Investment company registration forms are regulated by the U.S. Securities and Exchange Commission (SEC) Form N-PORT and Investment Company LEI requirements. European trading rules enforce a strict 'no-LEI, no-trade' policy under European Securities and Markets Authority (ESMA) MiFID II/MiFIR LEI requirements and 'No LEI, No Trade' policy. Regulatory committees monitor standard implementations following the Regulatory Oversight Committee (ROC) ROC Committee Guidelines for Global LEI System. The Federal Reserve details U.S. banking expectations in the Federal Reserve Board (FRB) Supervision and Regulation Letter SR 14-7 on LEI Expectations, and LOU accreditation standards are managed via the Global Legal Entity Identifier Foundation (GLEIF) GLEIF Accreditation Requirements for Local Operating Units (LOUs).

💡 Expert Guidance: Identifier Scope Confused Registration

Many international compliance teams assume that having a U.S. Employer Identification Number (EIN) or a commercial DUNS number satisfies global financial reporting requirements. U.S. tax IDs and commercial credit markers do not substitute for an LEI, which is legally mandated under international rules for swap trade reporting.

Frequently Asked Questions

Can I use an EIN instead of an LEI? ▾

No. An EIN is a domestic U.S. tax ID issued by the IRS, while an LEI is an international code required for global financial market trading.

Who owns and administers the DUNS system? ▾

The DUNS system is owned, managed, and licensed by Dun & Bradstreet, a private commercial corporation.

What is the difference between a DUNS number and a TIN (Taxpayer Identification Number)? ▾

A DUNS number is a proprietary commercial credit rating identifier issued by Dun & Bradstreet, while a TIN (such as an EIN) is a government-issued tax number used for federal tax compliance.

What is the primary difference in scope between an LEI, a DUNS number, and an EIN? ▾

The LEI is a global financial entity standard overseen by a foundation, the DUNS number is a proprietary commercial credit marker, and the EIN is a national taxpayer identification number issued by the IRS.

Who issues the Employer Identification Number (EIN) to U.S. entities? ▾

The Internal Revenue Service (IRS) issues the EIN to businesses, partnerships, estates, and sole proprietors to establish corporate tax identity and facilitate federal tax reporting.

Is my business required to have both an LEI and an EIN? ▾

Every U.S. employer must have an EIN for tax filings. However, you only need an LEI if you participate in regulated financial transactions, trade derivatives, or are required to report transactions by financial regulators.

Can a commercial credit score be checked using an LEI? ▾

No. Commercial credit agencies (like Dun & Bradstreet or Experian) use their own registries (such as the DUNS number) to score business credit, though some platforms map LEIs to credit profiles.

Does the GSA require an LEI to win federal contracts? ▾

No, the GSA requires a SAM.gov Unique Entity ID (UEI) and a CAGE code. An LEI is not required to bid on or perform standard federal acquisitions.

How does data ownership differ between the LEI and DUNS systems? ▾

The LEI database is public-domain and open-access, allowing anyone to download the reference data. The DUNS system is proprietary, and Dun & Bradstreet restricts database distribution through licensing terms.

Are sole proprietors eligible to get an LEI? ▾

Yes, sole proprietors operating as legal concerns in financial markets are eligible to apply for and receive an LEI from an accredited LOU.

Does an EIN contain check digits like an LEI? ▾

No, the 9-digit IRS Employer Identification Number (EIN) does not contain mathematical check digits or verification checksums, making format length checks the primary validation method.