ERC-20 Tokens Explained: The Blockchain Standard Transforming Crypto

ERC-20 tokens are digital assets built on the Ethereum blockchain.
Written by
Updated on Feb 26, 2025
Reading time 4 minutes

Key Takeaways

Copy link to section
  • ERC-20 is a Critical Token Standard. Developed in 2015, this Ethereum-based protocol defines a universal set of rules for creating tokens, ensuring consistent behavior and seamless interaction across blockchain platforms
  • Six Essential Smart Contract Functions. ERC-20 tokens must implement key functions like totalSupply(), transfer(), and approve(), which enable standardized token management and transactions
  • Broad Ecosystem Compatibility. The standard allows tokens to integrate easily with wallets, exchanges, and decentralized applications, dramatically simplifying blockchain token development and adoption

What Are ERC-20 Tokens?

Copy link to section

ERC-20 tokens are digital assets built on the Ethereum blockchain. 

These assets follow a standard set of rules known as the ERC-20 standard. 

They are interchangeable with other Ethereum-based applications. 

ERC-20 tokens are used for various sectors of the industry, including decentralized finance (DeFi) platforms, initial Coin Offerings (ICOs), and blockchain games. 

ERC-20 tokens are often compared with BEP-20 tokens, which operate on the Binance Smart Chain.

Understanding the differences between these token standards can help you decide which is better: ERC-20 or BEP-20 for your needs.

What is the Importance of ERC-20 Tokens?

Copy link to section

ERC-20 stands for Ethereum Request for Comment 20, the official protocol developers use to create tokens on Ethereum. 

They are important for several reasons. 

Mainly, they allow companies, projects, and developers to create their own cryptocurrencies while using Ethereum’s robust blockchain for security and decentralization. 

They allow developers to launch decentralized apps (dApps), conduct fundraising through token sales, and even represent real-world assets digitally. 

There are over 400,000 ERC-20 tokens in circulation, with billions of dollars traded daily 1

Key Features of ERC-20 Tokens

Copy link to section

The ERC-20 standard includes six key functions that ensure every token behaves the same way.  2

This uniformity means developers can create wallets, exchanges, and smart contracts that seamlessly support ERC-20 tokens. 

Some of the key features include:

  • Transferability. Tokens can be easily sent and received.
  • Fixed Supply. Developers can limit the number of tokens.
  • Compatibility. ERC-20 tokens work with all Ethereum wallets and applications.

When choosing a wallet, it’s important to ensure it supports ERC-20 tokens.

Some of the best options include MetaMask, Trust Wallet, and Ledger.

If you’re looking for secure storage, researching which wallet is best for ERC-20 can help you make an informed decision.

How do ERC-20 Tokens Work?

Copy link to section

ERC-20 tokens use smart contracts to define their rules. 

A smart contract is essentially a digital agreement on the Ethereum blockchain. It automatically handles transactions (like a middleman). 

This means that when you send an ERC-20 token to someone, the smart contract guarantees it gets to the right place. 

To use Etheruem and its tokens, you’re required to pay a gas fee. This is a transaction fee for using the network’s computers to process your request. 

One thing to remember with ERC-20 tokens is that gas fees can be expensive. During busy times, fees can rise dramatically. 

Another interesting aspect of ERC-20 tokens is their role in non-fungible tokens (NFTs).

If you’re wondering about their compatibility, it’s worth exploring whether ERC-20 coins can be used for NFTs.

Final Word

Copy link to section

ERC-20 tokens changed the cryptocurrency industry by standardizing how assets operate on Ethereum. 

These tokens are an important part of the blockchain space and power countless projects and platforms. 

If you’re unsure about a token’s classification, understanding how to know if a token is ERC-20 can help you avoid scams and ensure compatibility with Ethereum-based services.

Going forward, ERC-20 tokens are expected to remain relevant and drive the next wave of decentralized applications. 

FAQs

Copy link to section
01

How do ERC-20 tokens work?

02

What are the most popular ERC-20 tokens?

03

Is ERC-20 the same as ETH?


Sources & references

Prash Raval

Prash Raval

Financial Writer

  • Forex
  • Trading
  • Stocks
  • Investing
  • Football
Prash is a financial writer for Invezz covering FX, the stock market and investing. For over a decade he has traded spot FX full time while running an educational service helping novice traders learn the markets. He has a keen interest in micro and small cap stocks....