Sui Network (SUI) Taxes 2026: Staking Rewards, WAL Airdrop & the Cetus Hack

SUI as property: the tax foundation

The IRS treats Sui Network's SUI token as property under Notice 2014-21 — the same general framework that governs Bitcoin, Ethereum, and every other cryptocurrency.¹ The core rules:

SUI launched on mainnet on May 3, 2023. Long-term stakers since launch have accumulated hundreds of ordinary income events that must be individually reported — and most tax software does not handle Sui's epoch-by-epoch staking history with full accuracy.

2026 long-term capital gains rates for SUI

Long-term SUI gains are taxed at the standard LTCG rate ladder, stacked on top of your ordinary income for the year. Rates are adjusted annually for inflation under IRC §1(h)(1) per IRS Rev. Proc. 2025-32.²

The 3.8% Net Investment Income Tax (NIIT) applies on top of these rates when your modified adjusted gross income (MAGI) exceeds $200,000 (single) or $250,000 (MFJ). This threshold is not indexed for inflation, so it catches more taxpayers each year. At the top bracket, the combined federal rate on long-term SUI gains reaches 23.8%.³

Short-term gains (SUI held 12 months or less) are taxed as ordinary income at your marginal rate, reaching 37% in 2026 — nearly 14 percentage points above the top long-term rate. SUI reached an all-time high of approximately $5.35 in January 2025. Buyers who accumulated in mid-2024 and sold at that peak faced fully short-term rates on their gains. Most holders who bought near the January 2025 ATH now carry long-term losses — see the loss harvesting section below.

Worked example

A single filer earns $180,000 in W-2 income in 2026. After the standard deduction, taxable income is approximately $154,900. She sells $300,000 in long-term SUI with a $30,000 cost basis — a $270,000 long-term gain. That gain stacks on top of $154,900, pushing taxable income to $424,900. The portion of the gain from $154,900 to $545,500 (~$270,000) is taxed at 15%. NIIT at 3.8% applies on the full $270,000 gain since MAGI exceeds $200,000. Total federal tax on the sale: approximately $51,300. The same $270,000 gain held less than 12 months would be taxed as ordinary income at 32–35%, producing roughly $87,000 in federal tax — a $35,000 premium for impatience.

SUI staking: approximately 365 ordinary income events per year

Sui Network uses delegated proof of stake with epochs lasting approximately 24 hours. Staking rewards are distributed to delegators at the end of each epoch — roughly once per day. Under IRS Rev. Rul. 2023-14, staking rewards are ordinary income at fair market value when the taxpayer receives "dominion and control" over them, which for Sui delegators means each epoch's reward distribution date.⁴

Unlike Cosmos ATOM, which uses a manual-claim model that creates a constructive-receipt deferral opportunity, or Polkadot DOT, which requires manually triggering payouts within an 84-era window or rewards are permanently forfeited, Sui staking rewards are automatically distributed by the protocol at epoch end. There is no timing action a delegator can take to defer recognition — rewards arrive in the delegator's wallet each epoch regardless of any user action.

Validator node operators who run Sui validator infrastructure (minimum stake requirement for a first-party validator is substantial; most retail participants stake through delegation) may owe self-employment tax on their node operation income at 15.3% on the first $184,500 of 2026 SE income. The 2026 Social Security wage base of $184,500 is per Rev. Proc. 2025-32.² Passive delegators owe ordinary income tax on epoch rewards but not SE tax — NIIT at 3.8% applies instead once MAGI thresholds are crossed.

For a deep treatment of how staking income, DeFi yield, and the SE-tax-vs-NIIT question interact across the full crypto stack, see the crypto staking and DeFi income taxes guide.

WAL token airdrop: two waves, two income events

Walrus, a decentralized storage protocol built natively on the Sui blockchain, launched its mainnet and WAL utility token on March 27, 2025. The total WAL supply is 5 billion tokens, with 10% reserved for community distribution.

First wave: March 2025 (soulbound NFT airdrop)

Before mainnet, eligible Walrus testnet participants and active Sui ecosystem contributors received soulbound NFTs containing WAL allocations — 4% of the 5 billion total supply (200 million WAL). Claiming opened at mainnet launch on March 27, 2025. Recipients who did not claim at mainnet launch had the opportunity to claim throughout the spring 2025 period.

Second wave: August 2025 (WAL staker distribution)

A separate distribution targeted direct WAL token stakers, using a June 30, 2025 snapshot. More than 80,000 wallets qualified. Claiming opened in August 2025.

Tax treatment for both waves

Under Rev. Rul. 2019-24, airdropped tokens are ordinary income at fair market value at the time the taxpayer gains "dominion and control" — the date the tokens are transferred to the recipient's wallet and available for use or sale.⁵ For both WAL distribution waves:

• Income recognition is triggered by the date the WAL tokens appear in the recipient's wallet — not the snapshot date, the announcement date, or any earlier event.
• The FMV of WAL at the time of receipt becomes the cost basis for the future capital gain calculation when WAL is eventually sold.
• Recipients who claimed the March 2025 wave, held for more than 12 months, and sell in April 2026 or later qualify for long-term capital gain rates on any appreciation above their basis.
• Recipients who claimed the August 2025 wave but did not report WAL as ordinary income on their 2025 return have an underreported income issue that should be addressed with a CPA — either on the original return if not yet filed, or via Form 1040-X.

Neither WAL distribution wave came with a Form 1099-MISC. Like most protocol airdrops, recipients are responsible for self-reporting income based on FMV at receipt. The Form 1099-DA guide explains why protocol airdrop income generally falls outside the new IRS digital asset broker reporting regime — which makes self-reporting more important, not less, because there is no IRS cross-reference for these events.

The broader airdrop income framework — including the Rev. Rul. 2019-24 analysis, the timing question for claim-style vs. auto-credited distributions, and estimated tax planning after a large airdrop — is covered in the crypto airdrop and hard fork taxes guide.

Cetus Protocol exploit (May 2025): tax treatment for LP providers

On May 22, 2025, Cetus Protocol — at the time the primary decentralized exchange and concentrated liquidity AMM on Sui — suffered a $223 million exploit triggered by a rounding bug in a third-party math library used for liquidity pricing calculations. The attacker drained Cetus liquidity pools in under 15 minutes.⁶

What happened to the funds

Sui Network validators used on-chain governance to freeze the attacker's wallets, preserving approximately $162 million in assets on the Sui chain before they could be exited. The remaining approximately $61 million was bridged to Ethereum before the freeze and remains largely unrecovered as of August 2026. Cetus Protocol relaunched on June 9, 2025, with the frozen funds returned and a compensation plan for affected liquidity providers: 15% of the total CETUS token supply — 5% claimable at relaunch and 10% distributed linearly over 12 months.

Tax treatment: funds that were returned (the ~$162M)

LP providers whose assets were frozen by Sui validators and subsequently returned through the June 9, 2025 relaunch likely did not sustain a deductible investment loss for tax purposes. The IRS requires a loss to be "sustained" — meaning there is no longer a reasonable prospect of recovery — before it becomes deductible under IRC §165. Because the frozen funds were returned, affected LPs who received their positions back cannot claim a 2025 loss deduction on those amounts.

Tax treatment: unrecovered funds (the ~$61M bridged to Ethereum)

LP providers who lost funds that were bridged to Ethereum before the freeze face a different analysis. Under OBBBA (July 2025), the personal casualty and theft loss deduction under IRC §165(c)(3) was permanently eliminated for non-federally-declared disasters. However, IRC §165(c)(2) — investment losses on property held for investment — was not eliminated by OBBBA and may apply to unrecovered DeFi LP losses.

The practical timing problem: the loss under §165(c)(2) can only be deducted in the year it is "sustained" with no reasonable prospect of recovery. Since legal action against the attacker was ongoing as of late 2025, most practitioners would say the loss was not yet sustained and should not be claimed for tax year 2025. If and when recovery efforts are formally exhausted, the loss is deductible in that year. LP providers in this situation should preserve detailed records of the exploit event and all subsequent communications about recovery.

Tax treatment: CETUS token compensation

The CETUS tokens distributed as compensation — 5% of total supply claimable at relaunch (June 9, 2025) and 10% distributed linearly over the following 12 months — are ordinary income at fair market value on each date of receipt. Each linear distribution event creates a separate income event with its own FMV and resulting cost basis.

If an LP provider deducted an investment loss in a prior year and then receives CETUS token compensation, the tax benefit rule requires including the recovery as ordinary income in the year of receipt, to the extent the prior deduction actually reduced tax owed.

DeFi on Sui: afSUI liquid staking, Navi Protocol, and AMMs

afSUI liquid staking (Aftermath Finance)

Aftermath Finance offers liquid staking on Sui where depositing SUI returns afSUI — a ratio-based token whose exchange rate against SUI increases as staking rewards accrue epoch by epoch. This is structurally similar to rETH on Ethereum and stATOM on Cosmos. Two tax positions exist:

The Ethereum taxes guide covers the same analysis for rETH and stETH — the underlying IRS framework is identical because afSUI uses the same ratio-appreciation model rather than a rebasing token structure.

Navi Protocol: lending and borrowing on Sui

Navi Protocol is Sui's primary lending and borrowing platform, comparable to Aave on Ethereum. Key tax events:

• Supplying assets to earn yield: Yield earned on supplied SUI or other tokens is ordinary income at FMV at each distribution or accrual event, under the same dominion-and-control rule governing staking income.
• Borrowing against SUI collateral: Borrowing USDC or other assets against deposited SUI is not a taxable event. You have not disposed of SUI — you have borrowed against it and must eventually repay the loan.
• Collateral liquidation: If your SUI collateral is liquidated because your position falls below Navi's liquidation threshold, the liquidation is a taxable sale of your SUI at the liquidation price. Gain or loss is measured against your SUI cost basis — not the amount originally borrowed. SUI's price volatility makes liquidation a realistic scenario on a concentrated DeFi lending position.

The mechanics of borrowing against crypto collateral, including the break-even math against selling and investment interest deductibility under IRC §163(d), are covered in detail in the crypto-backed loans guide.

Cetus AMM, Turbos Finance, and other Sui DEXes

Every swap executed on Cetus AMM (which relaunched June 2025), Turbos Finance, DeepBook, or any other Sui-native DEX is a taxable disposal of the input token at the exchange rate at the time of the swap. Gas fees paid in SUI on each Sui transaction are separately taxable SUI disposals — small per transaction but they accumulate across hundreds of DeFi interactions over a year of active use. Cross-chain activity via Wormhole or the Sui bridge creates additional taxable events when one asset is exchanged for another during bridging.

Get matched with a crypto financial advisor

If you hold SUI, WAL, or CETUS tokens — or were affected by the Cetus Protocol exploit — a fee-only advisor who works with crypto wealth helps you reconstruct prior-year staking income, document your DeFi positions, and plan forward before the return forces the decision.

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Loss harvesting for January 2025 ATH buyers

SUI reached an all-time high of approximately $5.35 in January 2025. Buyers who accumulated near that peak and have held for more than 12 months now hold long-term losses and have an opportunity to lock in those losses without any wash sale restriction.

Unlike stocks and ETFs, the IRS wash sale rule under IRC §1091 does not apply to cryptocurrency. You can sell SUI at a loss and immediately repurchase it — maintaining your economic position — while realizing the tax loss. There is no 30-day waiting period and no loss disallowance from repurchasing within 30 days before or after the sale.

Harvested losses first net against capital gains of the same character (long-term losses against long-term gains), then cross to offset the other type. Net capital losses beyond all gains absorb up to $3,000 of ordinary income per year, with any remainder carrying forward indefinitely. The crypto tax loss harvesting guide covers loss netting, lot selection strategy, and how to sequence harvesting across a multi-asset portfolio to maximize the per-dollar value of each loss realized.

Five planning strategies for SUI holders

1. Bracket management: realize gains up to the next rate threshold

The 2026 Crypto Capital Gains Bracket Calculator shows exactly how much long-term SUI gain you can realize before crossing from the 0% to 15% bracket, or from 15% to 20%. A married filer with $200,000 in ordinary income can realize roughly $413,700 in additional long-term gains before hitting the 20% threshold. Staging SUI sales across multiple tax years keeps more gain in the 15% bracket rather than forcing a single large sale into the 20%/23.8% zone.

2. Specific identification to select high-basis lots first

If you accumulated SUI at multiple prices — $1.30 near the May 2023 mainnet launch, $2.50 in 2024, and $5.00 near the January 2025 ATH — specific identification lets you choose which lots to sell. Selling the highest-basis lots (purchased near the 2025 peak, where losses exist) first minimizes the gain per SUI sold while preserving the lowest-basis positions for future step-up or charitable giving strategies. Confirm your exchange supports specific-ID elections and save the written confirmation before executing.

3. Donate appreciated SUI directly to a DAF

For early SUI holders with a very low cost basis — mainnet-launch buyers at approximately $1.24–$1.36 per SUI in May 2023 — donating appreciated SUI directly to a donor-advised fund eliminates the embedded capital gain entirely. You receive a charitable deduction for the full fair market value; neither you nor the DAF pays capital gains tax on the appreciation. The crypto charitable giving guide covers the 2026 OBBBA AGI floor and cap rules for charitable deductions and the Form 8283 qualified appraisal requirement for donations of non-cash property over $5,000.

4. Hold to death for the IRC §1014 step-up in basis

SUI held until death receives a step-up in cost basis to fair market value under IRC §1014. The embedded gain disappears for heirs. The OBBBA (July 2025) made the $15M estate exemption permanent, so most estates will not face estate tax on SUI held at death. The critical prerequisite — unique for digital assets — is that the estate must be able to access the SUI. The crypto estate planning guide covers multi-sig setups, seed phrase inheritance, and how to coordinate custody with estate access so that heirs can actually receive the stepped-up asset.

5. Borrow against SUI to access liquidity without selling

Using a CeFi crypto-backed loan to borrow against SUI is not a taxable event at origination. You retain the asset, defer the embedded gain, and access dollar liquidity. The central risk is forced liquidation: if SUI drops below the collateral threshold, the lender sells your SUI — a taxable event at whatever the liquidation price is — without your approval. SUI's price history (peak near $5.35 in January 2025, significant drawdowns at various points) makes this a real planning consideration. The crypto-backed loans guide covers the break-even math against selling and investment interest deductibility under IRC §163(d).

Recordkeeping requirements for Sui Network holders

SUI presents specific recordkeeping challenges that older Layer-1s do not:

• Staking records: Each of the ~365 epoch reward distributions per year is a separate ordinary income event with its own FMV. Sui-compatible tax software must pull the Sui RPC staking history at the epoch level, not as a single annual total. Delegators who changed validators, moved between liquid staking and direct delegation, or used multiple wallets should verify complete capture across all staking activity.
• WAL airdrop records: Save the date the WAL tokens appeared in your wallet for both the March 2025 and August 2025 distribution waves, plus the fair market value of WAL on each claiming date. This is both your 2025 ordinary income and your cost basis for future WAL sales.
• Cetus exploit records: If you held LP positions in Cetus on May 22, 2025, document the full timeline: your LP token holdings and underlying assets at the time of the exploit, the date frozen assets were returned to your position, each CETUS token distribution date and FMV at receipt. This documentation supports whatever tax position you adopt — whether or not you claim an investment loss on unrecovered amounts.
• DeFi interaction records: Each swap, LP position entry and exit, and lending interaction creates one or more taxable events. Export wallet-level transaction history from Sui block explorers (Suiscan, Suivision) to supplement exchange records, especially for activity on protocols that do not issue tax forms.
• Transfer records: Wallet-to-wallet SUI transfers are not taxable sales. Document these clearly to prevent transfers from appearing as disposal events on Form 8949.

When to involve a financial advisor

A crypto-aware fee-only financial advisor coordinates the planning decisions that determine how much tax the CPA has to report. For SUI holders:

• If your unrealized SUI gain exceeds $100,000, the difference between an optimized sale (right year, right lots, right rate bracket) and an unoptimized one can easily reach $15,000–$40,000 in federal tax. Planning the decision before it happens is worth the cost of the conversation.
• If you received WAL tokens in either the March 2025 or August 2025 distribution and have not accounted for them as ordinary income, there is an underreported 2025 income question to resolve — and a cost basis to establish for the WAL position going forward.
• If you were a Cetus LP provider with unrecovered funds, the IRC §165(c)(2) investment loss analysis — when the loss is "sustained," how to document the position, and what happens to basis in any CETUS compensation tokens — is complex enough that CPA involvement is not optional.
• If you have been staking SUI since mainnet without reconciling epoch-by-epoch staking income, reconstructing 1,000+ income events for prior-year returns requires both a crypto-native CPA and tax software configured to pull the full Sui RPC staking history.

Get matched with a crypto financial advisor

Whether you are planning a large SUI sale, need to reconstruct years of epoch-by-epoch staking income, or have unresolved questions from the Cetus Protocol exploit — we match you with fee-only advisors who work with complex Sui ecosystem positions and coordinate directly with your CPA.

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