What is a Miner Fee? Crypto Network Fees Explained

October 15, 2026  ·  6 min read

Every time you send cryptocurrency — Bitcoin, Ethereum, Solana, or any other — a small fee is deducted from your transaction. This fee has different names depending on the blockchain: miner fee, network fee,gas fee, or transaction fee. They all refer to the same thing: the payment you make to the people (or validators) who process and confirm your transaction.

Why Do Network Fees Exist?

Blockchains are decentralised networks. No single company runs them — instead, thousands of independent nodes and validators maintain the ledger. These participants invest real resources: hardware, electricity, and bandwidth. Network fees serve three purposes:

• Compensating validators: Miners (Proof of Work) or stakers (Proof of Stake) earn fees as income for securing the network
• Spam prevention: Fees make it costly to flood the network with millions of junk transactions
• Priority mechanism: Higher fees signal urgency — your transaction gets included in the next block before lower-fee ones

How Bitcoin Fees Work

Bitcoin fees are measured in satoshis per virtual byte (sat/vB). A satoshi is one hundred-millionth of a Bitcoin (0.00000001 BTC). The "virtual byte" accounts for the SegWit discount applied to signature data.

When you send Bitcoin, your wallet estimates the optimal fee rate based on current mempool conditions. During low-activity periods (weekend nights UTC), fees might be 1–5 sat/vB (~$0.05–$0.25 for a typical transaction). During peak demand (market crashes, inscriptions minting), fees can spike to 200–500 sat/vB ($10–$50+).

A typical Bitcoin transaction is 140–250 vBytes, so at 20 sat/vB the fee is roughly 3,000–5,000 satoshis ($1.50–$3 at $60,000/BTC).

How Ethereum Gas Fees Work

Ethereum uses a different model: gas. Every operation on the EVM (Ethereum Virtual Machine) costs a fixed amount of gas units. A simple ETH transfer costs 21,000 gas; a complex DeFi swap might cost 150,000–300,000 gas.

Since EIP-1559 (August 2021), Ethereum fees have two components:

• Base fee: Set by the protocol based on network demand; this portion is burned (removed from supply)
• Priority tip: Optional extra paid to the validator to prioritise your transaction

The total you pay: gas units × (base fee + priority tip), denominated in gwei (1 gwei = 0.000000001 ETH). At 20 gwei base fee + 1 gwei tip, a simple transfer costs: 21,000 × 21 = 441,000 gwei = 0.000441 ETH (~$1.30 at $3,000/ETH).

Fee Comparison by Blockchain

• Bitcoin (BTC): $0.50–$10 typical; can spike to $50+ during high demand
• Ethereum (ETH): $1–$20 for simple transfers; $5–$100 for DeFi
• Litecoin (LTC): $0.01–$0.10 — consistently low
• Solana (SOL): ~$0.0005 — negligible
• USDT TRC-20 (Tron): ~$1 flat — fixed, predictable
• USDT ERC-20 (Ethereum): Same as ETH, usually $3–$15
• Monero (XMR): ~$0.01–$0.05 — private and cheap

Network Fees and Exchange Services

When you use an instant exchange like FixedFloat, two separate network fees apply:

1. Your outbound fee: Paid by you when you send the deposit transaction from your wallet — set by your wallet software
2. Exchange outbound fee: Paid by FixedFloat when it sends the exchanged coins to your destination address — this is included in the displayed exchange rate

The amount shown on FixedFloat already accounts for the outbound network fee — what you see is what you receive, with no hidden deduction at the end.

Tips for Minimising Network Fees

• Use SegWit addresses for Bitcoin (bc1q…) — SegWit transactions are ~40% smaller, costing proportionally less
• Time your transactions — Bitcoin mempool is typically cheapest on weekend nights (UTC); Ethereum congestion often drops overnight
• Use Solana or TRC-20 for stablecoin transfers — USDT on Solana or Tron costs a fraction of ERC-20
• Batch transactions where possible — sending to one address at a time is cheaper than multi-output
• Monitor mempool.space for Bitcoin fee conditions before sending