Crypto protocol upgrades: how they work and what you do
A crypto protocol upgrade changes the rules nodes enforce, through proposals, testing and activation. Most holders only update their wallet software.
Vahe HakobyanEditor-in-chief
Updated Oct 5, 20263 min readFact-checked
On this page
- Some upgrades need a token vote; others activate by network signaling.
- A soft fork keeps one chain; a hard fork can split it.
- The IRS taxes new hard fork coins as income.
You do not need to write code or run a node. Your side of an upgrade comes down to software, custody and timing.
What is an upgrade and its fork types?
A protocol upgrade changes the rules that a blockchain's nodes enforce. Networks use them to fix bugs, add features or change fees. The fork type decides how disruptive the change is.
- A soft fork tightens rules and stays compatible with older nodes.
- A hard fork changes rules that older software rejects, so the chain can split.
- Some upgrades change only a fee setting, with no fork at all.
What should you do before it starts?
Your work before activation comes down to software and custody. Update your wallet and read your exchange's notice about the upgrade.
How does the upgrade happen step by step?
An upgrade follows a rough order, though the approval step differs by network.
- 1Publish the proposalDevelopers write up the change and post it for review, where others point out problems.
- 2Test on a test networkThe code runs on a copy of the chain that holds no real value.
- 3Approve itToken-governed protocols hold a holder vote; other networks rely on operators and validators.
- 4Activate at the agreed blockNodes running the new software enforce the new rules. Some protocols wait out a timelock first.
- 5Watch for a splitIf a large group keeps the old rules, two chains can continue.
Who decides and how is it taxed?
Most public blockchains are not controlled by one company, though foundations and large validator groups can hold real influence. Developers write the code; the network's operators decide whether it goes live.
- Developers write and maintain the code.
- Node operators and validators decide whether to run the new rules.
- Proof-of-work miners pick a chain; proof-of-stake networks use validators instead.
- Token-governed protocols hold holder votes; Uniswap's UNI holders approved a fee change in December 2025.
- The IRS treats new coins from a hard fork as ordinary income when you control them.
Frequently asked questions
Usually not. The exchange runs the nodes, updates your balance and decides on its own whether to support a new coin.
After a soft fork it may keep working but show stale data. After a hard fork you stay on the old chain until you update.
A separate coin appears only when a chain splits and both sides keep running. It has no guaranteed value or buyers.
Yes, through another upgrade that operators and validators agree to run. It does not undo transactions already recorded.
