# Dynamic Transaction Fee Test on Mainnet on Monday, Sept 8th, 15:00 UTC to Sept 12th, 15:00 UTC **URL:** \ **Category:** Announcements\ **Created:** [September 4, 2025, 10:17pm UTC](https://forum.flow.com/t/dynamic-transaction-fee-test-on-mainnet-on-monday-sept-8th-15-00-utc-to-sept-12th-15-00-utc/8264 "2025-09-04T22:17:14Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![vishal](https://avatars.discourse-cdn.com/v4/letter/v/49beb7/32.png) [@vishal](https://forum.flow.com/u/vishal)\ **Post date:** [September 4, 2025, 10:17pm UTC](https://forum.flow.com/t/dynamic-transaction-fee-test-on-mainnet-on-monday-sept-8th-15-00-utc-to-sept-12th-15-00-utc/8264/1 "2025-09-04T22:17:15Z")
The [Dynamic Transaction Fee test on Testnet](https://forum.flow.com/t/dynamic-transaction-fee-test-on-testnet-on-friday-august-29th-15-00-utc-to-18-00-utc/8245) was conducted successfully last week. We will now run a smaller-scale test on **Mainnet** to validate that upstream and downstream systems (wallets, dApps, explorers, etc.) adjust to higher transaction fees automatically. **Date/Time:** Monday, September 8th, 15:00 UTC (8:00 AM Pacific) → Friday, September 12th, 15:00 UTC (8:00 AM Pacific) ### What to Expect - The **surge factor** will be raised from **1.0 to 1.01** (a 1% increase to transaction fees) by the service committee. - dApps and wallets are expected to automatically adjust by paying the correct transaction fees. - Our team will be monitoring transaction error rates and system behavior throughout the test. ### Funding Reminder If you notice your dApps or wallets being depleted faster during the test, please fund them with additional FLOW. ### 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: 3. ### [Flowscan.io](http://Flowscan.io) now has a new field to display surge ![Screenshot 2025-09-04 at 3.15.21 PM](https://us1.discourse-cdn.com/flex022/uploads/flow/original/2X/d/d32b6f3659f3fb7bb9e4d727a00f6f0d66422b8a.png) thank you, Flow team ---
**Author:** ![vishal](https://avatars.discourse-cdn.com/v4/letter/v/49beb7/32.png) [@vishal](https://forum.flow.com/u/vishal)\ **Post date:** [September 8, 2025, 3:03pm UTC](https://forum.flow.com/t/dynamic-transaction-fee-test-on-mainnet-on-monday-sept-8th-15-00-utc-to-sept-12th-15-00-utc/8264/2 "2025-09-08T15:03:58Z")
Transaction Fees on mainnet are now at 1.01