Jito tips vs priority fees: how Solana memecoin trades get into a block

A Jito tip vs a priority fee: both pay to get a Solana trade landed sooner. A priority fee is a per-compute-unit bid paid to the validator, charged even if the trade fails. A Jito tip is a SOL transfer into Jito's block-engine auction, and it is not paid if your bundle does not land.

Under both sits the base fee, a fixed 5,000 lamports per signature that every transaction pays, success or failure, part burned and part to the validator. The Solana fee docs and Jito's transaction docs define the other two as follows.

The practical difference: a priority fee is spent whether or not your trade lands, while a properly placed Jito tip is only spent when it does. "MEV protection" toggles are a third, separate thing, covered below.

A priority fee is set with two numbers: how many compute units your transaction may use and how many micro-lamports you pay per unit. A swap on a bonding curve uses a limited compute budget, so even a high price per unit is usually a small amount of SOL. Terminals hide the arithmetic and show the result in SOL.

The validator uses the fee as one input when ordering transactions: a preference, not a guarantee. On a busy launch hundreds of transactions compete for the same few slots, and a higher bid helps you land earlier.

Because the fee is charged even when a transaction reverts, the easy saving is to match it to the trade: a modest fee on calm coins, a higher one only when speed matters, and a slippage limit wide enough that the order actually fills.

Jito runs a block engine that validators using its client connect to. Instead of only bidding through the priority fee, you can send a transaction or a bundle to the block engine with a tip attached. The tip is just an ordinary SOL transfer, inside your transaction, to one of eight tip accounts that Jito publishes through getTipAccounts.

• A bundle is up to 5 transactions, executed in order and atomically: all of them land together or none of them do.
• Failed bundles cost nothing. A bundle that would fail is not included, so no base fee, priority fee or tip is paid. That is the main reason bots use them.
• The minimum bundle tip is 1,000 lamports. In practice, competitive tips during a hot launch are set by the auction and are far higher.
• For single transactions, Jito's docs suggest splitting spend between priority fee and tip, giving a 70/30 example, and putting the tip in the same transaction as the trade so a failed trade does not pay it.

What are Jito bundles used for on pump.fun?

Atomic ordering is what makes bundles powerful, and it cuts both ways. A trader can make two dependent steps, such as opening an account and swapping, land in order or not at all.

A launcher can bundle a token's creation with buys from many wallets so they all land in the first block, which is how bundled supply happens. And a bot can wrap someone else's visible transaction between its own buy and sell, which is a sandwich attack.

There is no stable number, because both the priority fee and the tip are auctions. What you can control is the shape of your spending:

1. 1

   Decide whether speed matters for this trade

   Sniping the first block of a launch is a speed contest. Buying a coin that has been trading for an hour is not; a modest fee lands it.

2. 2

   Use your terminal's presets, and read them

   Axiom, GMGN and similar terminals let you save fee and tip presets. Know what each one costs in SOL, then compare that with your typical order size.

3. 3

   Count fees per round trip

   A buy and a sell each pay. On a 0.2 SOL trade, 0.01 SOL of combined fee and tip per side is a 10% round-trip cost before any curve fee.

4. 4

   Track how many transactions land

   If many transactions revert, the priority fee on each one is spent without a fill. Choose cleaner entries or calmer coins rather than raising fees, and your landing rate and costs improve together.

The third step is the one most beginners skip: a fixed SOL fee weighs far more on a small order than a large one. On top of it, a pump.fun curve trade pays 1.25% to the venue each way and terminals typically add their own fee.

For a full breakdown, see what a memecoin trade actually costs or the cost table in memecoin trading, step by step.

A simulated order never reaches a block, so on Fullport there is no auction to bid in. Every order is charged a fixed modeled network fee, a base fee plus a priority fee, in SOL at the SOL/USD rate snapshotted onto the fill, and shown before you confirm.

There is no tip and no bundle, and block inclusion is not modeled: an order fills completely against a fresh read of the curve or pool, or is rejected cleanly (fill policy). You cannot be sandwiched and never pay for a reverted transaction. Since nobody out-tips anyone, your results come down to the coins you pick and when you enter.

The fill also charges the venue fee, a 1% platform fee and your own price impact. Your cost is capped at the one-time evaluation fee of $120 to $300: trading losses come out of the simulated balance, never your wallet. The target is +6% with a single 4% floor and no time limit (rules), and funded payouts send you 80% of profit in SOL, requested every 5 days. Trade from the browser terminal or with Fullport Tap on your usual terminal.