SIMD-0437: How Much SOL Can You Reclaim After Phase 2?

As of September 13, 2026, SIMD-0437 is in phase 2 on Solana mainnet. A standard token account originally funded with 0.002039280 SOL now needs to retain only 0.001488440 SOL. If nothing has been withdrawn, the difference of 0.000550840 SOL may be recoverable.

One account is a small amount. Across dozens of old wallets and hundreds of token accounts, it adds up. SolBack reads actual account balances and lets you use Rent Collector to bring eligible recoveries into one address. Here is how to work out what is available before starting a batch.

Which phase is live?

We checked the mainnet rent minimum and the phase 2 activation record. The current rate is 5,080 lamports per byte, making the minimum for a standard 165-byte token account 1,488,440 lamports. Phase 2 activated on September 11, 2026 at 21:12 UTC.

If an article says phase 1 just started, check its date. Solana’s excess SOL withdrawal guide was published on September 3, when phase 1 went live. The status here is based on our September 13 mainnet check.

How much does each of the five phases release?

SIMD-0437 lowers the deposit rate from 6,960 to 696 lamports per byte in five steps, for a final reduction of 90%. Each step frees roughly 9%, 18%, 36%, 18% and 9% of the original deposit.

For a standard 165-byte token account originally funded with 0.002039280 SOL. All amounts are in SOL, before service and network fees. “Total excess” assumes no earlier withdrawal; “new excess” is the additional amount after the previous phase. Reduction percentages are approximate.

The proposal’s 10% / 20% / 40% / 20% / 10% schedule describes each step’s share of the final reduction. Phase 2 brings the total reduction to about 27%; it does not release another 27% on top of phase 1.

Phases 3–5 were not active at the time of this check. Each needs a separate activation, so future amounts cannot be counted as available today. The calculation also depends on the account’s data length. Token-2022 accounts with extensions can be larger than 165 bytes.

Can you claim again after withdrawing in phase 1?

It depends on the balance still in the account. For the older account in the table, no previous withdrawal means 0.000550840 SOL is available in total. If you already withdrew 0.000183711 SOL during phase 1, phase 2 adds another 0.000367129 SOL.

An account created at the phase 2 minimum normally has no historical surplus. An account you already closed will not receive another refund at a later phase. Start with the account’s actual SOL balance minus its current required minimum, then check whether it is eligible for withdrawal.

Closing an account versus withdrawing its excess

If an empty account is no longer needed, closing it recovers its full actual SOL balance. An eligible older account still holding 0.002039280 SOL returns that gross amount when closed. The lower minimum does not reduce its refund to 0.001488440 SOL.

If you want to keep the tokens, an eligible excess withdrawal moves only the SOL above the current minimum. The account remains open and its token balance stays the same. There is no need to sell or burn the tokens to withdraw that excess.

SolBack supports eligible original Token and Token-2022 token accounts for excess withdrawal, excluding native wSOL accounts. This is not a claim on every DeFi position, stake account or program account. Do not add a full close refund and an excess withdrawal together for the same account.

How to collect across wallets with SolBack

For one wallet, connect it on the SolBack home page and scan. For a set of older wallets, open Rent Collector and work through the batch:

1. Import the wallets you want to process. Choose Import Wallets and enter one private key per line in base58 or array format. The batch signs locally using the imported wallets. Only use wallets you own and authorize, and check that the domain is solback.app. To check public address balances first, Batch Query needs no private keys.
2. Review the scan and enable “Withdraw excess SOL too”. Alongside closing eligible empty accounts, this withdraws excess SOL from the other eligible token accounts. Review the close count, excess count and quoted recovery.
3. Set one rent recipient. Enable the unified rent recipient and enter the address that should receive the recoveries. An address with an existing SOL balance is a practical choice: a new recipient still has to meet the on-chain minimum balance.
4. Set a unified gas payer if needed. One funded wallet can pay network fees for the batch, including source wallets without enough SOL. Sponsoring gas does not remove the recipient’s minimum-balance requirement.
5. Select the wallets and start the batch recovery. Check amounts, fees and the destination before running. Follow each wallet’s status and use confirmed transactions as the result. If any fail, refresh balances before processing what remains.

To consolidate the wallets’ spendable SOL too, separately enable the balance collection option and set its destination. To sweep one particular token from many wallets, use Batch Collector (Many to One). Those balance transfers are separate from the deposits freed by rent reduction.

What do you receive after fees?

Rent Collector deducts 20% of the rent and excess SOL actually recovered to support SolBack. Network fees are additional. In the 1,000-account example above, 0.550840 SOL becomes 0.440672 SOL after that deduction, before network fees.

Pure SOL or token transfers in Batch Collector carry no SolBack service fee. If rent recovery is enabled, the recovered portion carries the 20% deduction. Treat the article’s figures as gross examples, and check the quote and confirmed transaction results for your own accounts.