Token Account

Holds a balance of one specific token for one specific owner. Associated Token Accounts (ATAs) are the standard derivation.

Token Program 165 bytes

Sample: Jupiter USDC

(cached; refreshes hourly · mainnet only)

Mint Owner Amount Delegate Option Delegate (empty) State Is Native Native (reserved) Delegated Amount Close Authority Option Close Authority (empty)

	0	1	2	3	4	5	6	7	8	9	A	B	C	D	E	F
0000	c6	fa	7a	f3	be	db	ad	3a	3d	65	f3	6a	ab	c9	74	31
0010	b1	bb	e4	c2	d2	f6	e0	e4	7c	a6	02	03	45	2f	5d	61
0020	04	79	d5	5b	f2	31	c0	6e	ee	74	c5	6e	ce	68	15	07
0030	fd	b1	b2	de	a3	f4	8e	51	02	b1	cd	a2	56	bc	13	8f
0040	27	96	6d	0c	00	00	00	00	00	00	00	00	00	00	00	00
0050	00	00	00	00	00	00	00	00	00	00	00	00	00	00	00	00
0060	00	00	00	00	00	00	00	00	00	00	00	00	01	00	00	00
0070	00	00	00	00	00	00	00	00	00	00	00	00	00	00	00	00
0080	00	00	00	00	00	00	00	00	00	00	00	00	00	00	00	00
0090	00	00	00	00	00	00	00	00	00	00	00	00	00	00	00	00
00a0	00	00	00	00	00

View full hex

What it is

A Token Account holds one wallet’s balance of one specific token. Every SPL token balance lives in its own 165-byte account.

Why it exists

SPL Token deliberately separates mint metadata (the Mint account) from individual balances (Token Accounts). The same token — say USDC — exists as exactly one Mint and millions of Token Accounts, one per holder. Most wallets use Associated Token Accounts (ATAs): given a wallet pubkey and a mint, the ATA address is the deterministic PDA derived from the pair, so any tool can compute it without on-chain lookup.

Byte layout

Offset	Length	Field	Type	Notes
0	32	`mint`	`Pubkey`	Which token this account holds.
32	32	`owner`	`Pubkey`	Wallet that controls this account (signs transfers).
64	8	`amount`	`u64` LE	Balance in atomic units.
72	36	`delegate`	`COption<Pubkey>`	4-byte tag + pubkey. Approved spender, if any.
108	1	`state`	`u8` enum	`0` Uninitialized, `1` Initialized, `2` Frozen.
109	12	`is_native`	`COption<u64>`	4-byte tag + u64. Set on wrapped-SOL accounts; the u64 is the rent-exempt reserve.
121	8	`delegated_amount`	`u64` LE	Atomic units the delegate may spend.
129	36	`close_authority`	`COption<Pubkey>`	4-byte tag + pubkey. May close this account and reclaim rent.

Total: 165 bytes.

Where you see it

You encounter Token Accounts every time a wallet holds an SPL token — in wallet UIs, transfer instructions, DEX swap routes, and balance lookups. An “account not found” error on a transfer usually means the recipient’s ATA hasn’t been created yet.

Common gotchas

Frozen accounts can still receive tokens. State 2 (Frozen) blocks outgoing transfers but not incoming. Used by issuers like Circle for compliance.
is_native is not a boolean. It’s COption<u64> — when Some, the account is wrapped SOL and the inner u64 is the rent reserve to preserve on close.
ATAs are PDAs of the SPL Associated Token Account program, not of the Token program. The derivation seeds are [wallet, TOKEN_PROGRAM_ID, mint].
A Token Account’s owner is the wallet, not the Token program. The on-chain account’s owner field (in the account header, not these 165 bytes) is the Token program; the data’s owner field is the user wallet that authorizes spends.