How to Choose Your Dev Buy Size on pump.fun
How big should your pump.fun dev buy be? What 0.5, 1 and 2 SOL get you on a fresh curve, what buyers read into it, and how to pick a size you can defend.
By DevBundler Team · · 5 min read
The short answer
There is no single right dev buy, but a few percent of supply is a sensible middle ground. On a fresh mainnet curve, 1 SOL buys roughly 3.4% and a 3% target costs about 0.87 SOL. Size it so you have real exposure to the coin, but keep it small enough that your dev wallet plus any bundle wallets do not hold a share buyers will avoid.
Key takeaways
- The dev buy is the first buy on the curve, so it gets the best price any wallet will ever get.
- On a fresh mainnet curve, 1 SOL buys roughly 3.4% of supply, and a 3% target costs about 0.87 SOL.
- Buyers look at the dev wallet first. A share that looks like skin in the game reads better than one that looks like a future dump.
- Think about the dev buy together with your bundle wallets: the combined share is what matters.
- Pick the size by asking what you can afford to lose and what share you are comfortable holding.
Two devs launch on the same afternoon. One buys 0.1 SOL with the dev wallet. The other buys 5 SOL. Neither choice is wrong in the abstract, but each one sends a message the moment the coin appears, and both devs will live with that message for as long as the coin trades.
This guide is about picking the number deliberately instead of typing whatever comes to mind in the launch form.
What the dev buy actually is
On pump.fun, the creator can buy in the same transaction that creates the coin. That buy is the dev buy. Because it lands before anything else on a fresh bonding curve, it gets the lowest price any buyer will ever pay. What is a dev buy covers the mechanics.
Every pump.fun coin has 1,000,000,000 tokens and starts at a market cap of about 28 SOL on mainnet. The curve sells 79.31% of the supply before it completes and the coin migrates to PumpSwap. Those numbers are the same for every coin, which makes the first buy very predictable.
~3.4%
of supply for a 1 SOL dev buy on a fresh mainnet curve
0.8711 SOL
cost of a 3% dev buy in a real quote
~28 SOL
starting market cap on mainnet
The 3.4% figure varies a little, roughly 3.2% to 3.5%, depending on fees. It is a good mental anchor: about a third of a percent per tenth of a SOL at the very start, then slowly less as the price climbs.
What buyers read into it
Traders often weigh the dev buy before they buy themselves. They are asking two questions: does the dev have anything at stake, and could the dev hurt me by selling?
Small dev buy
- Little room for the dev to crash the price by selling
- Reads as low commitment if it is very small
- Leaves more of the early curve for outside buyers
- Cheap if the coin goes nowhere
Large dev buy
- Shows the dev is exposed to the coin's outcome
- One sell from this wallet can move the chart hard
- Bigger loss if nobody else buys
- Some buyers skip coins where the dev holds a lot
Neither column is "good". A size in the middle tends to read as a dev who believes in the coin without being in a position to wreck it. That is why DevBundler's suggested default is 1 SOL: roughly 3.4%, enough to matter, small enough not to dominate.
The dev buy is not alone
If you are bundling, the dev buy is only part of the picture. Buyer wallets in the same bundle also bought in the launch block, and together they make up your total share.
So set the dev buy with the total in mind. A real quote on a fresh mainnet curve:
| Setup | Combined share | Curve sold |
|---|---|---|
| Dev 1 SOL + three buyers at 0.5 SOL | about 8.18% | about 10% |
| Dev 3% + three buyers at 2% | 9% | about 11% |
If you want the dev wallet to be the biggest single holder among your wallets, give it the largest buy. If you would rather the dev look modest, keep it close to the buyer amounts. Either way the combined share is what matters, and how to split supply across bundle wallets goes through the options.
Four questions to pick your number
Instead of a formula, run through these in order.
- 1
What can I lose?
Start with the SOL you can spend and not get back. The dev buy is spent the moment the bundle lands, and many coins never recover their launch price.
- 2
What share do I want to hold?
Pick a share that gives you a real stake without dominating the supply.
- 3
How big is the rest of the bundle?
Subtract the buyer wallets' share from the total you are comfortable with. What is left is the dev's room.
- 4
SOL or percent?
If you have a fixed budget, set the dev buy in SOL and read the estimated percentage. If you have a target share, set it in percent and let the app work out the SOL.
Common sizes and what they mean
These are rough readings based on the fresh-curve numbers above, not rules.
Dev buy sizes on a fresh mainnet curve
| Dev buy | Approximate share | How it tends to read |
|---|---|---|
| Nothing | 0% | Dev has no position. Snipers usually take the first blocks. |
| A few tenths of a SOL | about 1% or less | Low commitment, low risk to buyers |
| 1 SOL | about 3.4% | Middle ground, DevBundler's default |
| Several SOL | well above 3.4% | Clear exposure, but one wallet that can move the chart |
Because the price rises with every buy, doubling the SOL does not quite double the share. A 2 SOL dev buy gets less than twice what 1 SOL gets, and the gap grows the bigger you go. Use the launch table to read the exact estimate rather than multiplying.
Mistakes we see with dev buys
- Deciding in the form. The number gets typed under time pressure and ends up larger than planned. Write it down the day before.
- Ignoring the bundle. A modest dev buy plus ten large buyer buys still adds up to a large share.
- Forgetting the extras. The dev wallet pays about 0.03 SOL for the coin's accounts, plus the Jito tip and the platform fee, on top of the dev buy. If it is short, the launch will not go.
- Copying mainnet numbers from a devnet test. Devnet's pump.fun curve is configured very differently. In testing, a 1 SOL dev buy on devnet took 82% of supply and completed the curve, so devnet shares mean nothing for mainnet.
Next step
Once you have the dev buy, plan the rest of the bundle around it, then add up the cost. The full flow, from wallets to the confirmation dialog, is in how to launch a pump.fun coin with a bundle.
Frequently asked questions
›What is a good dev buy on pump.fun?
There is no single right number, but a few percent of supply is a sensible middle ground. On a fresh mainnet curve, 1 SOL buys roughly 3.4%, which is DevBundler's suggested default.
›Can I launch on pump.fun without a dev buy?
You can create a coin and buy nothing. It is cheaper, but you hold none of your own coin and the first buyers will usually be bots.
›Why does the dev buy get more tokens than later buys?
Because it is the first buy on the bonding curve. Every buy raises the price, so the same SOL gets fewer tokens each time after that.
›Should I set the dev buy in SOL or as a percentage?
If you care about the resulting share of supply, set a percentage and let DevBundler work out the SOL. If you have a fixed budget, set SOL and read the estimated percentage.
Keep reading
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