# Dynamic Transaction Fee Test on Testnet on Friday, August 29th, 15:00 UTC to 18:00 UTC **URL:** \ **Category:** Announcements\ **Created:** [August 26, 2025, 8:19pm UTC](https://forum.flow.com/t/dynamic-transaction-fee-test-on-testnet-on-friday-august-29th-15-00-utc-to-18-00-utc/8245 "2025-08-26T20:19:31Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![vishal](https://avatars.discourse-cdn.com/v4/letter/v/49beb7/32.png) [@vishal](https://forum.flow.com/u/vishal)\ **Post date:** [August 26, 2025, 8:19pm UTC](https://forum.flow.com/t/dynamic-transaction-fee-test-on-testnet-on-friday-august-29th-15-00-utc-to-18-00-utc/8245/1 "2025-08-26T20:19:31Z")
**Date/Time:** Friday, August 29th, 15:00 UTC to 18:00 UTC (8:00 AM – 11:00 AM Pacific) The [FLIP 336: Dynamic Transaction Fees](https://github.com/onflow/flips/pull/336) proposes raising transaction fees during periods of network overload. As part of implementing the FLIP, we will be conducting a dynamic transaction fee test on Flow **Testnet** to validate that transaction fees adjust as expected during periods of simulated network overload. ### What to Expect - Transaction fees will progressively increase by changing the surge factor by factors of 1.1×, 2×, 4×, 10×, and 100×. - dApps and wallets are expected to automatically adjust by paying the correct transaction fees. - We will be monitoring transaction error rates and system behavior throughout the test. - This test will be conducted on testnet and will have no impact on mainnet. ### Funding Reminder If you notice your dApps or wallets being depleted faster during the test, please fund them with additional FLOW. You can use the [testnet faucet](https://faucet.flow.com/fund-account) to top up the payer account. ### How to Track the Current Surge 1. **Query the chain via a script** 2. **Track FeeParametersChanged event** When the surge factor changes, the `FeeParametersChanged` event is emitted by the FlowFees contract. Query it with: ### thank you, Flow team