**Understanding BIP-110: Corporate Impact and Action Guide**
BIP-110, a Bitcoin Improvement Proposal, is approaching its first major activation phase. Currently projected to enter mandatory signaling around block 961,632 (approximately August 9, 2026), it will lock in by block 963,648 (late August) and enforce new transaction rules at block 965,664 (early September). The proposal uses a 55% signaling threshold and will enforce its restrictions for 52,416 blocks, or about one year.
Bitcoin’s consensus changes rely on coordination among miners, users, and nodes. Miners choose the valid chain to extend, users decide which coins and payments to recognize, and nodes independently choose which rules to enforce. Durable consensus is reached when all groups converge on the same chain.
### What BIP-110 Changes
BIP-110 restricts large data pushes, oversized output scripts, undefined witness versions, Taproot annexes, deep Taproot control blocks, OP_SUCCESS opcodes, and certain Tapscript conditionals. Importantly, it grandfathers UTXOs created before activation, meaning existing coins remain compatible with the new rules. Standard monetary transactions and ordinary Lightning payments continue to function, though Lightning channel monitoring may be affected during a chain split.
### Most Corporations Don’t Have to Do Anything
For most corporations, BIP-110 requires no immediate action. Typical corporate Bitcoin usage—as a store of value or long-term treasury asset—is largely unaffected. Payments face limited direct impact, as on-chain transactions remain compatible and Lightning payments occur off-chain. Even companies running their own nodes can simply continue operating under existing rules if they choose, though supporting BIP-110 is also an option.
A BIP-110 node enforces stricter validation, rejecting non-compliant blocks after mandatory signaling. Non-BIP-110 nodes remain more permissive, accepting both compliant and legacy-valid blocks. The key risk lies in chain splits, where different nodes may follow separate branches based on accumulated proof of work.
### Corporations Dealing with Chain Splits
Mining companies face the greatest immediate exposure due to sunk costs in electricity and hardware. They must choose which chain to mine based on expected community support, or pause mining until the split resolves. Exchanges and custodians should prepare for settlement uncertainty, as six-confirmation guarantees weaken during splits. Operators should raise confirmation requirements, monitor both branches, and delay final settlement until one chain clearly accumulates more work.
Let’s imagine a chain split at block height **S**. A deposit appearing on Chain A at S+4 and Chain B at S+6 would require an operator to wait until both branches reach sufficient depth (e.g., six confirmations) before considering the transaction final. If the deposit appears on only one branch, chain-specific accounting or extended confirmation waits become necessary to prevent double-spending. In practice, monetary transactions will eventually appear on both branches, since BIP-110 does not ban standard payments.
### Conclusion
The primary concern with BIP-110 is the possibility of a chain split. Without a split, no changes are needed. Even with a split, BIP-110 is unlikely to cause insurmountable problems. Corporations should prepare by lengthening confirmation times and monitoring both chains during splits. Node runners supporting BIP-110 should update their nodes accordingly, while miners, exchanges, and custodians should adjust settlement procedures and maintain chain visibility. For most corporate Bitcoin users, BIP-110 changes very little—if anything at all.
### FAQ
**Q: What is BIP-110?**
A: BIP-110 is a Bitcoin Improvement Proposal that restricts certain transaction data structures to improve network security and resource usage. It limits large data pushes, oversized scripts, and undefined witness versions, among other features.
**Q: When does BIP-110 activate?**
A: BIP-110 enters mandatory signaling at block 961,632 (projected August 9, 2026), locks in by block 963,648 (late August), and activates new rules at block 965,664 (early September).
**Q: Do most corporations need to take action?**
A: No. Most corporate Bitcoin activities, such as holding or standard payments, remain unaffected. Only nodes running non-BIP-110 software may need to decide whether to switch.
**Q: What is a chain split?**
A: A chain split occurs when different nodes enforce different rules, causing the network to divide into separate branches. Each branch may follow its own validation rules, leading to temporary uncertainty.
**Q: How should companies handle chain splits?**
A: Companies should lengthen confirmation times, monitor both branches, and delay final settlement until one chain clearly has more accumulated work. Miners should choose the branch expected to have the most support.
**Q: Does BIP-110 affect Lightning Network payments?**
A: Lightning payments occur off-chain and are generally unaffected, but channel monitoring and force-close behavior may depend on which chain is considered authoritative during a split.
**Q: Should node runners switch to BIP-110?**
A: Node runners can choose based on their needs. Those supporting BIP-110 should run compliant software, while others may continue with current rules without issue.
### Conclusion
BIP-110 introduces tighter validation rules for Bitcoin transactions, with activation expected in late 2026. While most corporate users will see little to no impact, awareness of chain splits and proper preparation are essential for exchanges, miners, and node operators. By adjusting confirmation practices and monitoring network developments, corporations can navigate this change smoothly and continue leveraging Bitcoin securely.
