USDC on Solana in numbers, read from the chain and from Circle on 15 October 2026.

USDC on Solana: the figures and when they were read

Every number below was read on 15 October 2026, from the Solana chain itself or from a page Circle publishes, and each one moves daily. Treat the table as a snapshot with a timestamp, not as a current reading.

DefiLlama is an aggregator, not an issuer, so its total is a count of other people's tokens with its own method. Set against it, Circle's Solana figure is about 43% of the dollar stablecoins on Solana that DefiLlama tracks. Other stablecoins on Solana are covered in PYUSD, USDG, EURC: other stablecoins on Solana.

How to read the USDC supply on Solana yourself

The supply of any Solana token is one JSON-RPC call away: getTokenSupply returns the total supply of a mint, the account that defines a token. A mint is identified by its address, and real USDC on Solana is EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v, the address Circle lists for Solana mainnet. This is the call we ran:

curl -s https://api.mainnet-beta.solana.com -X POST \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"getTokenSupply",
       "params":["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"]}'

The answer carries the amount in base units, "7761624060164788", with "decimals":6 and the slot it was read at. Six decimals means one USDC is 1,000,000 base units, so the supply was 7,761,624,060.164788 USDC at that slot. Any Solana RPC provider gives the same answer for the same slot. The method is documented in Solana's RPC reference. Check the address first: a token named USDC at any other address is not Circle's, as how to check real USDC on Solana shows.

Why the Solana mint and Circle report different amounts

The Solana mint reports more USDC than Circle's figure because the mint counts every token that exists, while Circle's figure behaves like a circulation count. Circle does not document the endpoint's method, but its August 2026 reserve report defines circulation as the supply on its approved chains minus three lines, and names Solana as one of four chains where the first line applies:

On 31 August 2026 those unissued tokens came to 1,614,400,102 USDC across the four chains. The other two deductions were 129,900,512 USDC of "Access Denied Tokens", restricted to comply with a law or legal order, and 73,960 USDC of Circle Gateway pending burns. The report gives no split per chain.

On 15 October the gap between the mint and Circle's Solana figure was about 987 million USDC (7,761,624,060 minus 6,774,674,211). That fits the definition above, but we cannot say how much of it is unissued and how much is restricted, because Circle does not publish those lines by chain. If you quote a Solana USDC figure, say which of the two it is. The reserve itself is covered in how USDC is backed and redeemed.

Where Solana ranks among the chains Circle reports

By Circle's own figures at 10:33 UTC on 15 October 2026, Solana held the second-largest amount of USDC of any chain, with HyperEVM close behind:

The ranking says where USDC sits, not where it is spent. A chain can hold a large balance in a few contracts that rarely move. Comparing chains for payments is a different question, taken up in USDC on Solana vs Ethereum, Base and Polygon.

What the USDC mint account shows

The USDC mint account on Solana names who can create USDC and who can freeze it. Read with getAccountInfo on 15 October 2026, it showed:

• Owner program: TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA, the original SPL Token program, not Token-2022.
• Decimals: 6. The account is 82 bytes.
• Mint authority: BJE5MMbqXjVwjAF7oxwPYXnTXDyspzZyt4vwenNw5ruG, the only key that can create new USDC on Solana.
• Freeze authority: 7dGbd2QZcCKcTndnHcTL8q7SMVXAkp688NTQYwrRCrar, a key that can freeze any USDC token account.

A freeze authority on the mint means any single USDC token account can be frozen, so that it can neither send nor receive USDC. What that means for a payment is in can USDC be frozen.

What moving USDC on Solana costs

A Solana transaction costs a base fee of 5,000 lamports for each signature, and a lamport is one billionth of a SOL. Solana's documentation says the base fee is split "50% burned / 50% to the validator", and an optional priority fee, the compute-unit price times the compute-unit limit, goes 100% to the validator. The fee is paid in SOL, not USDC, which is why a wallet needs a little SOL to send USDC.

Accounts also need rent, a SOL balance held for as long as the account exists and returned when it is closed. We read the live minimums on 15 October 2026 with getMinimumBalanceForRentExemption:

Those amounts work out to 5,080 lamports per byte, including 128 bytes of overhead per account. Rent is falling in steps: Solana's reduced-rent page describes SIMD-0437 cutting the rate from 6,960 to 696 lamports per byte in five steps, with steps 3 to 5 expected in Agave 4.4 in November 2026. Any rent figure here will be out of date after that.

What these numbers mean for a payment through Fianto

Fianto accepts USDC on Solana only, and only the native mint above. In a one-off payment the customer signs one transaction that sends the price straight to the merchant's wallet, and the checkout shows the Solana fee as "paid by you, under $0.01". The merchant pays nothing, not even a network fee, and there is no Fianto fee during the beta; after it, customers pay about 0.1 to 0.5% on top of the price.

Subscriptions add two things for the customer. Subscription charges on plans created since 6 October 2026 carry a flat 0.01 USDC network fee today, the first charge included. And each subscription pays rent for its subscription account, which comes back when the customer reclaims it after the subscription ends, while a wallet's first subscription also pays the wallet setup rent, which does not come back. The checkout shows the exact live amounts before anyone signs. The breakdown for payers is on what it costs in the Fianto docs, and the merchant side of taking USDC is in how to accept USDC on Solana.

None of these figures says where supply or prices will go next, and this post makes no forecast. Supply on one chain rises and falls as Circle mints and redeems and as holders bridge USDC between chains.