Trade & liquidity

Pricing: a constant-product pool

A PumpSwap pool holds two reserves: the coin and SOL. Trades keep their product steady, so each buy makes the next token a little dearer and each sale makes it cheaper. The pool fee comes out of the SOL side. The practice run prices trades with these formulas; PumpSwap applies the same idea on chain, and the real review always shows PumpSwap’s own result.

1. Buy with an exact amount of SOLSOL in after fee = SOL spent × 10,000 ÷ (10,000 + fee bps); tokens out = coin reserve × SOL in ÷ (SOL reserve + SOL in)Every division rounds down, in the pool’s favour.
2. Sell an exact amount of the coinSOL before fee = SOL reserve × tokens in ÷ (coin reserve + tokens in); you get that minus the feeThe fee is worked out per recipient and rounded up.

Example: buy with 1 SOL

1. The pool holds 100 SOL and 200,000,000 coinsPrice 0.0000005 SOL per coin; with 1,000,000,000 coins in supply, a 500 SOL market cap, which sets a 1.2% pool fee (next section).
2. The fee comes off first1 SOL × 10,000 ÷ 10,120 = 0.988142292 SOL; fee 0.011857708 SOLLP 0.001976284 · creator 0.009387352 · protocol 0.000494072 SOL.
3. Tokens out200,000,000 × 0.988142292 ÷ 100.988142292You receive about 1,956,947.161465 coins. That is a 2.2% price impactHow much your own trade moves the pool price. Bigger trades in smaller pools move it more. Shown here with the pool fee included., the 1.2% fee included.
4. Minimum received at 1%1,956,947.161465 × 9,900 ÷ 10,000, rounded down1,937,377.68985 coins. If the pool moves so you would get less, the whole swap is refused.

Selling 1,000,000 coins into the same pool pays 0.497512437 SOL before the fee and 0.491542286 SOL after it. The Try it tab uses these formulas, so you will see the same numbers. The real tool does not rely on them: it simulates your exact transaction against PumpSwap on mainnet and shows what PumpSwap itself returns.

Pool fees: who gets what

PumpSwap charges each trade a fee in three parts. The rates come from Pump’s fee config on mainnet and step down as the coin’s market cap (pool price × total supply) grows. Read on 2026-10-29 (slot 462,806,434):

• Market capTotal feeSplit
• Under 420 SOL1.25%LP 0.02% · creator 0.3% · protocol 0.93%
• 420 to 1,470 SOL1.2%LP 0.2% · creator 0.95% · protocol 0.05%
• 1,470 to 2,460 SOL1.15%LP 0.2% · creator 0.9% · protocol 0.05%
• 9,820 to 14,740 SOL0.95%LP 0.2% · creator 0.7% · protocol 0.05%
• 49,120 to 54,030 SOL0.55%LP 0.2% · creator 0.3% · protocol 0.05%
• 98,240 SOL and up0.3%LP 0.2% · creator 0.05% · protocol 0.05%

• LP fee stays in the pool. It is not paid out; it makes every LP token worth a little more.
• Creator fee waits in the pool for the coin’s creator (or its fee-sharing recipients) to collect with Collect fees.
• Protocol fee goes to Pump.
• Fees waiting in the pool are not liquidity and do not move the price. VEYDUCT takes nothing from trades.

Pump sets and can change these rates. The table lists 6 of the 25 current tiers; your review always shows the result PumpSwap returns for your exact trade.

Slippage, minimum received and the review

1. Simulate firstWhen you review, the server builds the canonical PumpSwap transaction for your wallet and simulates it on mainnet. The estimate is the exact change to your token and wrapped SOL accounts.
2. Set the limit from the resultminimum = simulated amount × (10,000 − slippage bps) ÷ 10,000, rounded downBuys and sells carry it as min_base_amount_out / min_quote_amount_out; withdrawals carry one for each side.
3. Simulate again with the limitThe final transaction, limits included, must simulate cleanly before your wallet opens.
4. Re-check before signingYour wallet signs only after the page checks the network, the network fee and that the review is under 30 seconds old. The signed transaction is simulated once more before it is sent.

Choose a maximum price movementAlso called slippage. How far the price may move against you before the swap is refused. At 1% you accept at least 99% of the simulated amount. of 0.5%, 1% or 2% (the server accepts up to 5%). A smaller allowance protects the price but fails more often in a busy pool; a refused swap moves no tokens.

Liquidity and LP tokens

LP tokensYour share of a pool. They grow with the LP part of each trade fee and can be redeemed for both sides of the pool. are your share of the pool. You choose how many LP tokens you want; the pool takes coins and SOL in its current ratio.

1. What a deposit needsneed = reserve × LP tokens ÷ LP supply, rounded up (for each side)The SOL side uses the pool’s real SOL: waiting protocol and creator fees are left out.
2. The most you depositmaximum = need × (10,000 + slippage bps) ÷ 10,000, rounded upExample: 10 LP from a pool with 100 SOL, 200,000,000 coins and 4,472.135954999 LP needs 447,213.595501 coins and 0.223606798 SOL; at 1% you deposit at most 451,685.731457 coins and 0.225842866 SOL.
3. Removingyou get reserve × LP tokens ÷ LP supply, rounded downWith a minimum on each side. Adding and removing straight away returns one smallest unit less on each side: rounding always favours the pool.

• LP tokens are Token-2022 tokens owned by your wallet. Their value moves with the price: if the coin falls, your share holds more coins and less SOL.
• LP supply differs a lot between pools. On some graduated pools very few LP tokens exist, so one LP token can be worth a lot of SOL; always read the maximums in the review.
• Permanent liquidity moves LP tokens into custody that has no withdrawal instruction: the program can only take LP in, never send it out. It refuses every lock while the program could still be upgraded.

Accounts a trade touches

Every address is derived from fixed seeds, so the page only ever builds transactions for the canonical pool of the coin you chose.

Costs

VEYDUCT feeTrades, liquidity, unwrapping and locks carry no VEYDUCT fee.

None

PumpSwap pool feeTaken by the pool from the SOL side of each trade; see the fee tiers above. Not charged on adding or removing liquidity.

0.3% to 1.25%

Network feeOne signature, no priority fee.

0.000005 SOL

Your coin account, if missingCreated in the same transaction at mainnet rent (165 bytes classic, 170 Token-2022).

≈ 0.0015 SOL

Your LP accountOn your first deposit for a pool.

≈ 0.0015 SOL

Wrapped SOL accountWithout one, it opens and closes inside the same transaction and its rent comes straight back.

0

First permanent lockLock receipt (120 bytes) and its LP custody account (170 bytes).

≈ 0.0028 SOL

Wrapped SOL and Token-2022

• Wrapped SOL. The pool trades SOL as a token (wrapped SOLSOL held as a token so a pool can trade it. Unwrapping closes the token account and returns plain SOL, rent included.). If your wallet has no wrapped SOL account, each transaction wraps what it needs and closes the account at the end, so you only ever see SOL.
• Left-over wrapped SOL. If your wallet already has a wrapped SOL account (from another app), sale proceeds land there and stay wrapped. Use Unwrap SOL under More details to close it: its balance and its rent come back as SOL.
• Pump coins. Newer Pump coins are Token-2022 with metadata only; older ones are classic SPL. Both are supported; the page reads which program the coin uses.
• Approvals. If one of your token accounts lets another address spend from it, the review refuses until you choose to remove that approval as the first step of the same transaction.

Edge cases and what can go wrong

Words used on this page

Graduated coin

A Pump coin whose bonding curve has sold out. It then trades in a PumpSwap pool, which is what this page uses.

PumpSwap pool

The coin’s SOL pool on PumpSwap, Pump’s own market. Its price follows x × y = k.

Maximum price movement (slippage)

Also called slippage. How far the price may move against you before the swap is refused. At 1% you accept at least 99% of the simulated amount.

Minimum received

The simulated amount less your maximum price movement. If the pool would pay less, PumpSwap refuses the whole swap and no tokens move.

Price impact

How much your own trade moves the pool price. Bigger trades in smaller pools move it more. Shown here with the pool fee included.

LP tokens

Your share of a pool. They grow with the LP part of each trade fee and can be redeemed for both sides of the pool.

Wrapped SOL (wSOL)

SOL held as a token so a pool can trade it. Unwrapping closes the token account and returns plain SOL, rent included.

Creator fee

The part of each trade fee that waits in the pool for the coin’s creator, who claims it on Collect fees.

FAQ