Hard Forks and Soft Forks: The Difference Explained

“Hard fork” appears frequently in blockchain news. Although the term may sound unfamiliar, its central meaning is an update that changes blockchain rules. Let's examine hard forks, how they differ from soft forks, and what they mean for coin holders.

What Is a Hard Fork? A Major Change to Blockchain Rules

A fork means a branch; in blockchains it refers to an update that changes network rules (the protocol). A hard fork changes rules in a way that is incompatible with the previous rules.

Think of completely rewriting traffic rules. Participants (nodes) must update their software to follow the new rules. Nodes that do not update reject the new rules, so in some cases the blockchain can split into two branches. This possibility of a chain split is a defining feature of hard forks.

Hard Forks vs. Soft Forks

Both change rules, but differ in compatibility with the previous version.

Category	Hard Fork	Soft Fork
Compatibility	Incompatible with old rules	Compatible with old rules
Update	Required for nodes following the new rules	Can operate with only some nodes updated
Chain split	Possible	Not expected in principle
Scope of change	Large and fundamental	Relatively limited

Example A soft fork adds stricter conditions within existing rules, so old nodes can still accept the new blocks as valid. A hard fork can make old nodes regard new blocks as rule violations, allowing the chains to diverge.

A Chain-Split Example: Bitcoin Cash (BCH)

A well-known example is Bitcoin Cash (BCH), which split from Bitcoin (BTC) in 2017. The community disagreed over block size and processing speed. Some participants who could not reach consensus adopted new rules increasing block size and created a separate chain.

The result was two independent blockchains sharing an origin but following different rules. They share transaction history before the split, then follow separate paths afterward. Hard forks can therefore resolve technical disagreements or conflicts over project direction. Some new altcoins are created through hard forks.

Effects on Coin Holders

In a hard fork that splits a chain, holders of the original coin at the split may receive an equal quantity of the new chain's coin. This does not happen for every hard fork and depends on the project and exchange policies.

Coins held on an exchange: Support for the new coin and distribution timing vary by exchange. Always check official announcements.
Coins in a personal wallet: Handling differs by wallet, so check wallet types and support in advance.
Possible trading suspensions: Deposits, withdrawals, or trading may pause around the hard fork.

Price volatility can also increase around a hard fork, and fake coins or impersonated instructions may exploit the confusion. Apply scam-avoidance principles and be particularly wary of links from unclear sources and requests to deposit funds.

Final Thoughts

A hard fork fundamentally changes blockchain rules and can sometimes lead to a chain split and a new coin. Holders may experience coin distributions or trading suspensions, making checking the project's and exchange's official announcements directly especially important.

This article is informational and is not an investment recommendation. A hard fork does not guarantee a price rise or profit, and no one can guarantee its outcome. Virtual assets carry a risk of losing principal; understand the situation sufficiently and decide carefully.

NOONOO TRADING invites you to follow live trading in our free chat.

Start in the bot

📈 OKX trading fee discount for new registrations