Gas & Fees Explained
Last updated: 2025-09-13
Gas fees power networks and vary by demand and design. Learn EIP-1559 on Ethereum, Arbitrum’s L2 model, and BNB Smart Chain, plus how to optimize and resolve stuck transactions.
Contents
What Are Gas Fees?
Gas measures computational work. You pay in the network’s native token to get your transaction included. Fees reflect demand and block space.
- On Ethereum (post EIP-1559): fee = base fee (burned) + priority tip.
- Simple transfers on EVM ≈ 21k gas; complex contracts require more.
- Use explorers and trackers to check current conditions.
External resources: Ethereum Gas Tracker, Arbitrum fees docs
Ethereum (EIP-1559)
EIP-1559 introduced a variable base fee per gas that is burned, and a priority tip to incentivize inclusion. Base fee rises with congestion and falls in quieter periods.
Tip: If urgency is low, lower your priority tip during off-peak hours to save costs.
Arbitrum (L2 Fees)
Arbitrum fees have two parts: L2 execution cost and L1 data inclusion cost (batched). Exact fees vary based on L2 activity and L1 congestion.
Using L2 can be cheaper for many actions, but bridging introduces separate risks and costs.
BNB Smart Chain (EVM)
BNB Smart Chain uses EVM gas; it is not a fixed-fee chain. Gas prices are typically lower and more predictable due to PoSA, but they still fluctuate with demand.
Optimize Gas on Ethereum/Arbitrum/BNB Smart Chain
- Transact off-peak; check trackers before sending.
- Prefer L2 for high-activity dApps; batch actions when possible.
- Set reasonable max fee/priority; avoid underpricing causing stalls.
- Prevent reverts: review approvals and contract calls carefully.
Not financial advice. MEV and on-chain dynamics can change outcomes; always verify recipients and amounts.
Stuck tx? Try speed up (replace-by-fee) or cancel using the same nonce with a higher fee.
L2s batch transactions; final fees depend on both L2 usage and L1 posting costs.
FAQs
What is gas?
A unit of computational work; you pay for gas in the network’s native token.
Why are my fees high?
Likely congestion. On Ethereum, base fee rises as blocks fill.
What is EIP-1559?
Mechanism with base fee (burned) and priority tip for inclusion.
How do I reduce gas?
Send off-peak, consider L2s, batch actions, and avoid reverts.
Why is my tx stuck?
Underpriced or conflicting nonce; speed up or cancel with higher fee.
Are BSC fees fixed?
No; EVM gas with typically lower prices due to PoSA.
What are Arbitrum fees?
L2 execution + L1 data inclusion costs.