What is this?

This page displays the transactions that paid the highest fees on the Kaspa network in recent history. Unlike Bitcoin or Ethereum where fees regularly reach dollars or even hundreds of dollars, Kaspa's BlockDAG architecture and high throughput (currently one block per second) keep typical transaction fees extremely low — often fractions of a cent. When a transaction appears on this list with a fee significantly above the norm, it signals something unusual happened.

Fee outliers on Kaspa usually fall into a few categories: urgent transactions where the sender prioritized speed during a brief congestion spike, misconfigured wallet software that overpaid due to a bug or incorrect fee estimation, or UTXO consolidation transactions that combine hundreds or thousands of small inputs into a single output. Consolidation transactions are particularly common for miners and exchanges who accumulate many small UTXOs over time and periodically merge them, resulting in large transaction sizes and proportionally higher absolute fees.

Tracking fee outliers over time reveals patterns in network usage that aren't visible from average fee metrics alone. A sudden cluster of high-fee transactions may indicate exchange movements, large OTC trades, or automated systems competing for block inclusion during periods of elevated demand. For Kaspa specifically, because base fees are so low, even the "largest" fees on this page may only represent a few cents — providing reassurance that the network remains affordable even under unusual conditions.

How to use this data

Traders and analysts can use this data to identify periods of unusual network activity. A spike in high-fee transactions often correlates with large exchange deposits or withdrawals, whale movements, or periods where automated trading systems are particularly active. If you see a sudden increase in fee outliers, it may be worth investigating what on-chain activity is driving the demand.

For miners, this data helps understand revenue beyond block rewards. While Kaspa's fee market is minimal compared to Bitcoin, tracking the upper bound of fees earned provides insight into future revenue potential as the network scales and block space becomes more competitive. Node operators can also use this data to validate that their fee estimation algorithms are working correctly.

Developers building wallets or services on Kaspa can reference this page to calibrate their fee estimation logic. If your application is consistently producing transactions that appear on this list, it may indicate a bug in your fee calculation. Conversely, understanding the ceiling of fees helps set appropriate maximum fee limits to protect users from accidental overpayment.

How it's computed

The data is sourced from the Kaspa virtual chain by resolving the input amounts for every accepted transaction. The fee for each transaction is calculated as the difference between the total input value and total output value — the standard UTXO model where inputs minus outputs equals the miner fee. This gives a 100% accurate per-transaction fee, unlike heuristics based on block rewards.

Block data is ingested continuously as new blocks are accepted by the DAG, with this page refreshing every 60 seconds. Each entry shows the transaction ID, fee amount, and timestamp so you can cross-reference with a block explorer for full transaction details.

It's important to note that Kaspa uses a mass-based fee system where transaction mass (a function of inputs, outputs, and script complexity) determines the minimum fee. Larger transactions with more inputs naturally pay higher absolute fees even at the minimum rate per unit of mass. This means many entries on this list are simply large consolidation transactions rather than intentional overpayment.