How much SOL fills a pump.fun bonding curve?

About 85 SOL at the time of writing. When the curve fills, the coin migrates to a normal pool.

Do I pay fees on a failed trade?

The priority fee and network fee are spent even when the swap does not go through. MemeSim simulates this too.

Are MemeSim's pump.fun fees the same as the real ones?

MemeSim uses the published pump.fun fee numbers, 1.25% on the curve and about 0.30% on PumpSwap, and adds a 1% platform fee like trading tools do.

Guide

pump.fun for Beginners: How It Works and What It Costs

pump.fun is a Solana launchpad where anyone can create a memecoin in minutes. Coins trade on a bonding curve until about 85 SOL is in, then migrate to a normal pool, and most never get that far.

Updated Oct 30, 2026

What is pump.fun?

pump.fun is a website on Solana where anyone can launch a memecoin for almost nothing. You pick a name, a ticker and a picture, and the coin exists a few seconds later. Thousands of coins launch every day. Most of them fade within hours.

Because launching is so easy, pump.fun is where many traders look for the next big coin, and also where many beginners lose their first SOL. Understanding how it works is the first step to not being one of them.

What is a bonding curve?

A new pump.fun coin does not start with a normal trading pool. It starts on a bonding curve: a formula that sets the price from how much SOL has been put in so far. Every buy pushes the price up the curve. Every sell pushes it back down.

This means early buyers get more tokens per SOL and later buyers get fewer. It also means the price is entirely driven by attention. A coin at 20% progress along the curve is not a company or a product. It is a bet that more people will show up.

What is migration?

On pump.fun the curve fills at about 85 SOL. When it fills, the coin migrates, or graduates. The SOL and tokens move into a real pool on an automated market maker (AMM), and normal trading begins. pump.fun has its own AMM for this, called PumpSwap.

Migration is a moment many traders play. Some buy just before it, hoping for a pop. Many sell right after. The large majority of launches never fill the curve at all. They collect a few SOL, stall, and die.

What does a pump.fun trade cost?

Fees are where most beginners lose without noticing. At the time of writing, the fees look like this.

pump.fun bonding-curve swap fee: 1.25% of each trade while the coin is still on the curve.
PumpSwap fee after migration: about 0.30% of each trade.
Solana network fee: 0.000005 SOL per transaction. Tiny, but always there.
Priority fee: extra SOL you pay to get your transaction in faster. Traders often pay around 0.001 SOL and much more when the network is busy. It is charged even when the trade fails.
Trading bot or terminal fee: most trading tools add about 1% of the trade on top of everything above.

Where do beginners usually lose?

The losses are rarely dramatic at first. They are a series of small leaks that add up.

Buying the top of a coin that was already dying, because the chart looked exciting and you rushed.
Buying a coin with a few SOL of liquidity, then selling into the same pool and moving the price against yourself.
Being up 30% and seeing fees, slippage and priority take half of it on the way out.
Holding a winner without taking profit, then watching it become a loser.
Buying a coin that was bundled or sniped at launch, so insiders already own the supply and sell into you.
Getting rugged: the creator pulls liquidity or dumps their supply, and the coin goes to zero.

How can you practice pump.fun trading safely?

MemeSim simulates pump.fun coins with fake SOL and live prices. It charges the 1.25% curve fee on coins that are still on the curve and the 0.30% PumpSwap fee on migrated ones, plus a 1% platform fee, a priority fee and the network fee, all itemized on the receipt. Each fill waits 1 to 3 seconds like a real confirmation, and if the price moves past your slippage limit the trade fails and you still pay the priority fee.

The Pulse screen has a Final stretch column that shows coins close to migration. The Learn section has a bonding curve lesson and a lesson on early supply, each a few minutes long. Trade a few curve coins, a few migrated coins, and read every receipt. The habits you build there carry over.

Questions

How much SOL fills a pump.fun bonding curve?: About 85 SOL at the time of writing. When the curve fills, the coin migrates to a normal pool.
Do I pay fees on a failed trade?: The priority fee and network fee are spent even when the swap does not go through. MemeSim simulates this too.
Are MemeSim's pump.fun fees the same as the real ones?: MemeSim uses the published pump.fun fee numbers, 1.25% on the curve and about 0.30% on PumpSwap, and adds a 1% platform fee like trading tools do.