Definition
ERC-1400 is a set of Ethereum token standard specifications developed primarily by the Polymath Network team, in collaboration with TokenSoft and other security token pioneers, to address the fundamental inadequacy of ERC-20 for securities applications. The standard was proposed in 2018 and comprises multiple interrelated components: ERC-1410 (partially fungible tokens with distinct partitions), ERC-1594 (core security token functionality including forced transfers and issuance controls), ERC-1643 (document management for attaching legal documents to tokens on-chain), and ERC-1644 (controller operations enabling regulator override). Together, these components provide the compliance-relevant functionality that securities regulators require: the ability to distinguish between different classes of the same security (e.g., common shares and preferred shares), to compel token transfers in legally required scenarios, to attach legally binding documents to token issuances, and to allow designated controllers to override token transfers.
The partitioning feature in ERC-1400 (drawn from ERC-1410) is particularly significant for complex security structures. A single ERC-1400 token contract can represent multiple “partitions” — distinct pools of tokens with different rights, restrictions, or characteristics. This allows a single smart contract to represent both the common equity partition (unrestricted after lockup) and the restricted securities partition (subject to Rule 144 holding period requirements) of the same company’s stock, without requiring separate token contracts for each class. Similarly, a fund could use partitions to represent different share classes with different fee structures, distribution frequencies, or investor eligibility requirements, all within a single ERC-1400 token contract that maintains unified accounting.
Key Facts
- ERC-1400 was the dominant security token standard for early US STOs (2018-2020), with Polymath’s ST-20 token implementation (the production version of ERC-1400) used by tZERO, Blockstack, and hundreds of other early security token issuances.
- Polymath Network raised approximately $59 million in a 2018 token sale to fund development of its security token platform built on the ERC-1400 standard, making it one of the better-capitalized security token infrastructure providers of the era.
- The tZERO security token — one of the highest-profile US STOs — was issued using Polymath’s ERC-1400 implementation and traded on tZERO’s SEC-registered ATS beginning in 2019.
- ERC-1400’s gas efficiency is lower than ERC-3643’s because its partitioned balance tracking requires more complex storage operations, making it more expensive per transaction on Ethereum’s base layer.
- Polymath subsequently pivoted from Ethereum to Polymesh — its own purpose-built security token blockchain — arguing that a dedicated chain could provide better compliance features, privacy, and governance than Ethereum’s general-purpose environment.
- TokenSoft, a security token issuance platform, built its infrastructure on ERC-1400 and has issued security tokens for numerous companies including Regulation D private placements and Regulation A+ token offerings.
- The relationship between ERC-1400 and ERC-3643 is evolutionary rather than competing: ERC-3643 adopted many of ERC-1400’s core concepts (forced transfer, controller, document management) and reimplemented them in a more modular, gas-efficient architecture with the addition of the ONCHAINID identity system.
Relevance to Tokenization
ERC-1400 represents the first generation of purpose-built security token infrastructure and established the conceptual framework — partitioned balances, forced transfers, controller override, document management — that the entire field of compliant tokenization has built upon. The security token industry’s current technical standards, including ERC-3643 and various proprietary compliance token implementations, are direct descendants of the ERC-1400 design philosophy, which recognized that securities compliance requirements are qualitatively different from the requirements of general-purpose fungible tokens and require a purpose-built technical framework.
For tokenization practitioners working with legacy systems, ERC-1400 remains relevant because significant amounts of tokenized securities issued between 2018 and 2022 were issued on ERC-1400 infrastructure and remain subject to its transfer rules and compliance logic. Platforms that need to interoperate with these legacy token issuances must understand ERC-1400’s interface specifications, even if they are building new issuances on ERC-3643 or other next-generation standards. Migration paths from ERC-1400 to ERC-3643 — which involve issuing new tokens under the updated standard and executing forced exchanges — have been executed by several platforms, but the process requires careful legal and technical coordination.
Polymesh, Polymath’s purpose-built security token blockchain, represents an alternative technical path that abandons Ethereum’s general-purpose environment in favor of a blockchain designed from the ground up for securities compliance. Polymesh incorporates identity verification, compliance modules, and governance frameworks at the protocol level rather than the application level, potentially offering more reliable compliance enforcement than smart contract-based approaches on general-purpose blockchains. Whether purpose-built security token blockchains or standards like ERC-3643 on Ethereum will dominate the mature market remains an open question — one whose answer will significantly shape the technical infrastructure of the US tokenized securities market.
Related entries: ERC-3643, ERC-20, Security Token