CoinEx Shuts Down After Nine Years: What It Means for Crypto Accounting
CoinEx, the Seychelles-registered crypto exchange that once served millions of users across more than 200 countries, will cease most operations on 29 September 2026. The closure, announced on 15 September by founder and CEO Haipo Yang, is one of the more significant exchange wind-downs of the current cycle, and it carries direct, time-sensitive consequences for accounting firms, auditors, and CFOs who hold or report on client assets sitting on the platform. Good crypto accounting software and disciplined asset-tracking procedures are no longer a back-office luxury in an environment where even multi-year exchanges can announce a shutdown with less than two weeks' notice before services stop.
What CoinEx Has Announced
The exchange published a wind-down timeline in a formal announcement on 15 September 2026. The key dates and their practical implications are set out below.
The wind-down timeline
| Date | Event | Practical implication |
|---|---|---|
| 15 Sept 2026 | New registrations close | No new accounts; existing users only |
| 29 Sept 2026 | Most exchange services cease | Trading halts; any unwithdrawn assets may be liquidated into USDT |
| 22 Dec 2026 | Withdrawal window closes | Final deadline to recover funds from the platform directly |
| After 22 Dec 2026 | Residual USDT moves to independent custody | Monthly fee of 5% of original balance begins |
| 22 Aug 2028 | Custody claim deadline | Any unclaimed balance after this date is at risk of permanent loss |
Yang confirmed on X that he considered selling the platform but chose against it, describing his priority as ensuring users can withdraw assets in full and that employees receive a dignified exit. His public statement, candid by the standards of exchange communications, acknowledged that security and compliance risks had become "increasingly difficult to contain."
Why CoinEx Cited Compliance Costs as a Core Driver
The official explanation points to three converging pressures: a prolonged market downturn, shrinking industry volume and liquidity, and rising regulatory requirements and compliance costs. That combination is not unique to CoinEx. It describes the structural squeeze facing every mid-tier offshore exchange that built its user base during a period of lighter oversight and now faces a very different regulatory environment.
The US exit and the NYAG lawsuit
CoinEx withdrew from the US market in 2023 following a lawsuit filed by the New York Attorney General, which alleged the exchange was operating without proper registration under New York law. That exit removed the exchange from one of the world's largest retail crypto markets and, critically, signals the kind of jurisdictional enforcement that forces compliance costs upward even for platforms that choose to leave rather than fight.
Reported exposure to sanctioned entities
Earlier in 2026, a published report claimed that CoinEx had processed more than 3.8 billion US dollars in flows linked to sanctioned entities since 2019, including activity connected to Nobitex and other sanctioned counterparties. CoinEx has not publicly accepted those figures, but their existence in a published report is itself a compliance and reputational liability. For firms that had client assets on the platform, this reported exposure now enters the AML risk picture for those accounts, regardless of whether any individual client transaction was directly involved.
Accounting Implications for Firms and CFOs
An exchange closure is an accounting event, not merely an operational inconvenience. Several obligations arise immediately for any firm that holds, manages, or reports on client assets on CoinEx.
Asset recognition and impairment
Under IFRS and US GAAP, digital assets held on a third-party exchange are typically recognised as intangible assets or, where fair-value accounting has been adopted, at fair value through profit or loss. The moment a platform announces a wind-down timeline, the recoverability of those assets becomes a disclosure and impairment question. The 29 September service-cessation date means any assets not withdrawn by then face involuntary conversion to USDT at rates the platform controls. That involuntary conversion is a disposal event for tax and accounting purposes in most jurisdictions.
The custody fee structure and balance erosion
The post-22 December custody arrangement, charging 5% of the original balance per month, is aggressive. An asset left in custody for twelve months after the December deadline would lose 60% of its value to fees alone, entirely separate from any market movement. For clients or entities with dormant or forgotten positions, this is a material loss that accountants need to identify, flag, and act on now. The 22 August 2028 custody claim deadline is a hard backstop; missing it likely means an irrecoverable write-off.
Records and audit trail requirements
Firms should download complete transaction histories from CoinEx before 29 September, when most services stop. Exchange records are primary source documents for tax computations, capital gains calculations, and AML audit trails. Once a platform ceases operations, obtaining those records becomes uncertain and potentially impossible. This is exactly the kind of scenario where robust blockchain analytics and sanctions compliance for crypto firms matter: on-chain records can supplement or verify exchange data, but they cannot fully replace it for cost-basis and disposal proceeds calculations.
AML and Sanctions Risk: What Firms Must Assess Now
The reported 3.8 billion dollar figure linked to sanctioned-entity flows places CoinEx squarely in the category of exchanges that compliance teams at banks, payment institutions, and accounting firms should have been monitoring. If any client account received funds originating from CoinEx after January 2019, that transaction history needs to be reviewed against the reported sanctioned-entity exposure.
Transaction lookback and SAR obligations
Regulated firms, including those providing crypto accounting or custody services, have an obligation to assess whether historical transactions through CoinEx triggered or should trigger Suspicious Activity Report filings. The NYAG lawsuit and the sanctioned-entity exposure report are both matters of public record. Regulators in the US and UK have made clear that wilful blindness to publicly available adverse information does not satisfy AML due diligence obligations. Firms should conduct a proportionate lookback review of any client transactions routed through the platform, particularly any activity after 2019.
Counterparty risk in the withdrawal window
There is a narrower but real risk in the withdrawal process itself. Funds being moved out of CoinEx between now and 22 December 2026 should be traced carefully. Receiving a large transfer from a platform with reported sanctioned-entity exposure could itself trigger enhanced due diligence requirements at the receiving institution, whether that is a bank account, another exchange, or a custodian. Firms acting as intermediaries or advisers in that process need to document the withdrawal rationale and the source-of-funds narrative clearly. For further context on how illicit marketplace exposure flows through crypto accounting obligations, see our coverage of OFAC sanctions and what illicit marketplace exposure means for crypto accounting.
Practical Steps for Accounting Firms Right Now
Given the timelines, the priority order for firms with any CoinEx exposure is straightforward.
Immediate actions before 29 September
First, identify every client account or entity account with a CoinEx balance, however small. Run a search across your digital asset accounting software records and cross-reference with any exchange API connections. Second, export full transaction histories for each account in CSV or equivalent format and store them in your document management system with a clear audit trail. Third, initiate withdrawal instructions for all client balances. Even if a client is unresponsive, document your attempts to contact them. Fourth, assess each account for any red flags in the transaction history that may require AML review before the withdrawal is processed.
Between 29 September and 22 December
Any assets that convert to USDT at the 29 September service cessation should be recorded as disposal events at the prevailing exchange rate on that date. The receipt of USDT in place of another asset is a new acquisition at that same value for cost-basis purposes. Book this correctly in your digital asset accounting software at the time it occurs, not retrospectively. Continue to pursue withdrawals of the USDT balance before the 22 December deadline.
Post-December planning
For any balance that genuinely cannot be recovered before 22 December, document the reason, confirm the custody claim process with CoinEx, and diary the 22 August 2028 deadline prominently. The monthly 5% custody fee should be accrued as an expense in the relevant entity's accounts from the date the custody arrangement commences. If the balance is ultimately irrecoverable, a formal write-off will need to be recognised, with appropriate disclosure in financial statements.
The Broader Signal for the Industry
CoinEx's closure is unlikely to be the last of its kind. The combination of tighter licensing requirements across major markets, the cost of building and maintaining compliant AML and KYC infrastructure, and the reputational weight of historical enforcement actions is forcing a reckoning for exchanges that built their businesses under earlier, lighter-touch conditions. Yang's public acknowledgement that compliance risks became "increasingly difficult to contain" is a remarkably candid statement from a founder of a platform that served millions of users across nine years and more than 200 jurisdictions.
For accounting professionals, the practical lesson is the same one that every exchange failure reinforces: third-party exchange risk is a real balance-sheet exposure, not a theoretical one. Firms that maintain real-time reconciliation through crypto bookkeeping software, keep local copies of transaction records, and conduct periodic AML reviews of exchange counterparty risk are far better placed when a closure is announced than those relying entirely on exchange-held data and assuming continuity.
The regulatory pressure driving CoinEx's exit from the US in 2023 and ultimately its full closure in 2026 reflects a global trend toward mandatory licensing, enhanced AML obligations, and active enforcement against platforms that cannot or do not meet those standards. Firms that advise on or hold digital assets need to treat exchange operational risk as a standing agenda item, not a reactive one.
Frequently Asked Questions
Is a client's CoinEx balance guaranteed to be returned if they withdraw before 22 December 2026?
CoinEx has stated that withdrawals will remain open until 22 December 2026 and that its priority is ensuring users can recover assets in full. However, any asset not withdrawn before 29 September may be involuntarily converted to USDT at the platform's discretion. Clients should withdraw as soon as possible and not rely on the December deadline as a comfortable backstop.
How should an involuntary USDT conversion on 29 September be recorded in accounts?
The conversion of any non-USDT asset to USDT at service cessation should be treated as a disposal of the original asset and an acquisition of USDT at fair value on that date. The disposal proceeds equal the USDT amount received, valued at the prevailing USD rate. Capital gains or losses should be calculated accordingly under whichever tax regime applies to the entity.
Does reported sanctioned-entity exposure at CoinEx create an automatic SAR obligation for firms?
Not automatically, but it does create a due diligence obligation. Regulated firms should review client transaction histories involving CoinEx, particularly post-2019 activity, and assess whether any transactions show characteristics that, combined with the platform's reported exposure, meet the threshold for a Suspicious Activity Report. Document the review and its conclusions regardless of the outcome.
What happens to assets left in custody after 22 December 2026?
CoinEx has stated that residual USDT will be moved to an independent custody arrangement that will charge a monthly fee of 5% of the original balance. Claims against that custody must be made by 22 August 2028. Assets unclaimed by that date face permanent loss. The monthly fee should be accrued as an expense in financial statements from the date the custody arrangement begins.
How should firms document their CoinEx records before the platform closes?
Firms should export complete transaction histories in a durable format, such as CSV, before 29 September 2026. Records should be stored in a document management system with version control and linked to the relevant client files. Where on-chain verification is possible, blockchain analytics tools should be used to corroborate exchange records. These documents serve as primary source evidence for tax computations, audit purposes, and any future AML review.
Source: The Block