How do Network Fees work?

Swapabit TeamDec 2, 20254 min read

New users are often shocked when a $20 transfer costs $10 in fees. Here is the simple truth: You aren't paying us. You're paying for a seat on the blockchain.

In traditional banking, fees are often just profit for the bank. In crypto, fees are actually a functional part of the technology. They are bids in an auction.

The Bus Analogy

Imagine the blockchain is a bus station. A bus departs every 10 minutes (a "block"). This bus has exactly 50 seats.

If only 10 people are waiting at the station, everyone gets on. The ticket price is practically zero.

But if 1,000 people are waiting? The driver opens the door and says: "I only have 50 seats. I will give them to the 50 people willing to pay the most."

Suddenly, people start shouting bids. "I'll pay $1!" ... "I'll pay $5!" ... "I'll pay $20!" The top 50 bidders get on the bus. Everyone else has to wait for the next one.

This is exactly what happens when you send Bitcoin or Ethereum. You are bidding against everyone else in the world to get your transaction processed right now.

Why are some coins clearer than others?

Different "buses" have different rules.

Bitcoin: Paying for Luggage

Bitcoin charges you based on the data size of your ticket.

  • Sending $1,000,000 simply: Like mailing a small postcard. Cheap.
  • Sending $10 collected from 100 tiny sources: Like mailing a box of rocks. Expensive. It costs the same to mail a letter with a $1 check as it does to mail a letter with a $10,000 check. The value doesn't matter—only the weight does.

Ethereum: Paying for Fuel (Gas)

Ethereum is a computer. It charges you based on how much work it has to do.

  • Sending ETH: Easy work. Low Gas.
  • Swapping tokens (DeFi): Hard work. High Gas.
  • Minting an NFT: Very hard work. Very High Gas.

How to minimize your costs

  1. Wait for the weekend. Network traffic usually drops on Saturdays and Sundays. An Ethereum transaction that costs $20 on Tuesday might cost $2 on Sunday morning.
  2. Use cheaper networks. Ethereum is like a luxury limo service. Networks like Litecoin, Solana, or Arbitrum are like high-speed rains: they are efficient, fast, and cost pennies.
  3. Don't overpay. If you are not in a rush, most wallets let you select a "Slow" speed. You bid low, and maybe you miss the first bus, but you'll catch the third or fourth one once the crowd clears.