South Korea’s crypto gains tax may be delayed again. Traders still need a cost basis

South Korean officials are discussing another postponement of the crypto income tax scheduled for January 1. The presidential office has signalled support for moving the start to 2029, but the National Assembly has not passed that change. For a trader, the uncertainty reaches beyond the tax rate. The current law contains a special opening cost basis for coins held before the tax begins, and moving the start date would change the date used in that calculation.

Summary

• The law still schedules taxation of qualifying crypto transfers and lending from January 1, 2027, despite the latest proposal for 2029.
• Annual gains above 2.5 million won would face 20% national income tax plus 2% local income tax under the current framework.
• For pre-2027 holdings, the opening acquisition value is the higher of actual cost and a market value determined at the tax start.
• The National Tax Service plans November guidance on activities such as staking, airdrops, forks and decentralized finance.
• Korea expects international crypto data exchange from 2027, while officials cite the later U.S. timetable in the renewed delay debate.

A person who bought Bitcoin years ago may have several exchange statements, wallet transfers and trading fees to reconstruct. Under the currently published tax rules, that history is not necessarily the number used as the cost of a coin already held when taxation begins. The law compares the original acquisition cost with a prescribed market value at the start and chooses the higher one. The result can substantially change the gain on a later sale.

JUST IN: South Korea set to delay 22% crypto gains tax until 2029

The proposed tax has now faced its fourth delay since 2020, pushing back plans to tax profits from cryptocurrency investments. pic.twitter.com/InSyKWMyMF

— crypto.news (@cryptodotnews) October 25, 2026

The National Tax Service’s published guide still describes January 1, 2027 as the start. Parliamentary approval is required to replace it. Until then, a political statement about 2029 is a forecast of legislation, not the operative rule for taxpayers and exchanges preparing records.

The start date remains a question for lawmakers

South Korea enacted its virtual-asset income tax provisions in 2020 for an original January 2022 launch. Lawmakers postponed them to 2023, then 2025, then 2027. The latest account of presidential-office support for delay says ruling-party legislators have proposed a 2029 start and government consultations are expected. The opposition has supported postponement as well, while some of its members favour a still later date or repeal. Agreement that the timetable is difficult is not agreement on the text of an amendment.

The government’s August tax plan kept January 2027. Exchanges and officials continued preparing for it through October. At a parliamentary audit, the tax commissioner said detailed guidance was being prepared for November. A political decision can still overtake those plans during the annual tax-law review. Traders who assume postponement has already happened risk making decisions on a law that does not exist. Traders who assume no postponement is possible also need to follow the legislative process.

A petition seeking a two-year delay passed the 50,000-signature threshold for parliamentary review in September. Referral gives legislators a reason to consider the request; it does not itself amend the Income Tax Act. The petition, ruling-party proposal and opposition ideas are separate routes through the political debate, each requiring an enacted legislative outcome before traders can treat a new date as settled.

The planned levy applies to income from transferring or lending qualifying virtual assets after the effective date. The National Tax Service classifies it as separately taxed other income. Its guide gives a 20% national rate and an annual deduction of 2.5 million won; the commonly cited 22% includes the 2% local income tax. The first annual filing for 2027 income would fall in May 2028 if the law starts on schedule. A decision to move the start would also move that first relevant return, subject to whatever amendment Parliament passes.

The arithmetic is straightforward only after a gain is known. A trader with 5 million won in qualifying annual net income would deduct 2.5 million won, leaving 2.5 million taxable. At the combined 22% rate, the illustration produces 550,000 won. That example says nothing about the treatment of a particular DeFi reward, the taxpayer’s complete set of expenses or losses in other years. It should not be confused with a 22% tax on all proceeds or on an account balance.

An August confirmation of the 2027 timetable captured the government’s position before the October discussions. The change in official tone is news, but the legal sequence matters: proposal, committee consideration, parliamentary vote and promulgation. Investors need the enacted text for the effective date and any transitional rules. A press report cannot settle how an old holding will be valued if lawmakers choose 2029.

Why the opening valuation can matter more than the rate

The NTS guide states that for a virtual asset already held before January 1, 2027, the acquisition value is the greater of the actual acquisition cost and the prescribed market value at the end of the day before the tax starts. Under its current implementation, the guide refers to prices published at midnight as January 1 begins, with a specified average across designated domestic price-reporting providers for coins they handle. Other coins use the prescribed price from another qualifying provider. These are statutory and regulatory mechanics, not a trader’s choice of whichever exchange quote is highest.

Suppose a resident bought one coin for 10 million won years ago and its prescribed opening value is 30 million won. If the person later sells it for 35 million won, the starting cost for that pre-start holding is 30 million, not 10 million, before allowable ancillary expenses and the annual deduction are considered. The pre-tax rise is not included in this illustrative post-start gain. If the original cost were 40 million and the opening value 30 million, the higher original cost would be used. Both examples assume the current guide and an otherwise qualifying transaction; they do not calculate a final tax return.

A postponed start changes the hypothetical reference date, but the exact effect would depend on the amendment. If Parliament simply shifts the effective date and preserves the same higher-of-cost-or-market rule, a 2029 starting value would replace the 2027 reference. If it rewrites transitional provisions, the outcome could differ. No one can know a future prescribed market price in advance. Calling a delay automatically beneficial to every investor ignores holdings whose prices move down and people who may dispose of coins before the eventual start.

The guide’s valuation method makes record keeping important even with the opening step-up. A taxpayer needs to establish what coins and quantities were held at the boundary, whether they were locked, which were acquired at a higher actual cost, and what fees may be counted. A screenshot of a portfolio total is a weak substitute for transaction-level acquisition and disposal records. A transfer between one’s own wallets may look like an inflow on a receiving exchange without showing when the coins were originally acquired.

There is a subtler point in the “greater of” rule. It prevents a high pre-start purchase cost from being written down to a lower opening market price under the published provision. This matters for someone who bought at a peak and holds through the start. It also means two taxpayers selling the same coin for the same price can have different taxable gains because one has a documented original cost higher than the deemed value. Preserving historic evidence remains useful even if an opening valuation appears generous for many holders.

The average-cost method follows the owner

The NTS guide says acquisition cost is calculated for each resident using a total-average method for the same type of virtual asset. In simplified terms, the owner aggregates the relevant quantity and acquisition value of the same asset rather than choosing a particular high-cost coin to match a sale at will. Exact application must follow the implementing decree, but the principle makes a single exchange’s displayed “profit” inadequate for someone trading the same coin across several venues.

Consider a person who buys one unit for 10 million won and another identical unit for 20 million won after the tax begins. Before fees and other adjustments, the simple average is 15 million won per unit. Selling one for 25 million won does not generally let the person nominate the 20 million purchase as the sole cost just because it produces a smaller gain. The actual calculation may be affected by pre-start holdings, subsequent trades and the prescribed rules, which is why a dated ledger is better than a memory of the most recent trade.

Acquisition cost can include purchase price and acquisition fees. The guide also identifies expenses connected with disposal, such as sale fees. Income is calculated from consideration received for a transfer or lending, less allowable acquisition cost and related expenses. A reported exchange P&L might ignore network fees, transfers to other services or coins obtained outside that exchange. A trader should be able to reconcile the units that left with what came in, the value at the relevant time and the fees supported by records.

There is an exception described in the NTS materials for post-start purchases whose actual acquisition cost is difficult to verify. A deemed necessary expense based on a prescribed percentage of sale proceeds, capped at 50%, may be available for the whole class of the same asset under conditions delegated to regulations; separate incidental expenses would not then be allowed. The guide does not make this a universal taxpayer election to replace a documented cost whenever it is advantageous. How the inability to verify is judged and the final prescribed percentage need careful reading once guidance is settled.

A transfer between a domestic exchange and a private wallet does not create a new purchase receipt. It may, however, sever the exchange’s view of the original acquisition. A later return to an exchange can appear as a deposit with no cost history attached. The owner must preserve the chain of custody through wallet addresses, transaction identifiers, timestamps and exchange records. If a coin is converted into another asset, the transfer or exchange may be within the taxable categories after the effective date. The NTS guide includes selling and exchanging in its description of transfers.

Offshore trades are the political sticking point

Officials cite incomplete overseas transaction information as a reason to consider another delay. Korea expects to exchange data with other participating jurisdictions under the OECD’s Crypto-Asset Reporting Framework from 2027, but the reported U.S. implementation timetable points to 2029. The presidential office has reportedly worried that a 2027 Korean tax could require authorities to pursue some offshore trades manually while domestic exchanges supply records more readily.

CARF is an information-sharing framework, not the rule that creates an individual’s tax liability. If a resident has a taxable disposal on an overseas exchange, moving the account does not by itself remove the income from South Korea’s law.Government responses about private wallets and foreign exchanges made that point before the new delay discussions. Collection and verification can be harder across borders, which is a different issue from whether the transaction falls within the legislation.

The gap has a fairness dimension. A compliant domestic venue may provide authorities with enough information to check a return, while a foreign platform may not yet provide the same data through an automatic channel. An uneven probability of detection can reward activity outside the visible system even if the legal duty is identical. Exchanges argue that the reporting systems and definitions need time. Investors who have kept complete offshore records may reasonably ask why implementation for everyone should depend on when the United States joins an international exchange.

Neither 2027 nor 2029 promises complete visibility. A reporting framework can supply account and transaction data from covered service providers, but privately controlled wallets, decentralized activity and jurisdictional differences still need interpretation. Authorities must match transactions to residents, distinguish transfers between a person’s own accounts from sales, and identify the price and cost behind taxable disposals. The arrival of more data can improve enforcement without automatically producing an accurate cost basis for each wallet.

The proposed delay should thus be read as an administrative and political choice rather than an assertion that crypto gains cannot be measured. Parliament could decide the planned framework is workable enough in 2027, or that waiting until 2029 permits better reconciliation. The investor’s underlying records remain valuable under either timetable. A two-year postponement of filing does not reconstruct exchange statements that have already been lost.

November guidance has difficult cases to resolve

In October the tax commissioner told lawmakers the NTS was preparing more detailed guidance on staking, airdrops, hard forks and decentralized finance.Reporting on the planned November guidance described exchanges’ concern that these activities cannot all be handled like a straightforward purchase and sale. No final comprehensive treatment had been published by October 27. The timing and classification of any taxable income should not be invented ahead of that guidance.

A staking reward may arrive without a conventional purchase price. An airdrop may appear in a wallet without the recipient taking an active step. A hard fork can create a new asset with no obvious invoice for its acquisition. A DeFi position can represent a deposit, receipt token, loan or trade at different stages. The NTS guide clearly addresses income from transfers and lending, but the detailed basis and timing for the other activities are precisely what officials say they are still working through. An exchange can display a market value without settling the legal characterization.

Take a wallet that receives tokens for participating in a network, then later sells them. The owner needs the receipt date, quantity, any contemporaneous value and the eventual sale proceeds. If the guidance treats receipt as a taxable event, the subsequent basis could differ from a rule that taxes only on disposal. The relevant rule is not final in the materials available today, so neither calculation should be presented as the established answer. Keeping both timestamps and prices preserves options when the NTS clarifies its interpretation.

Cross-platform lending introduces a comparable accounting challenge. A user can send coins to a lending service, receive a claim token, earn a return and withdraw later. Treating every wallet movement as a sale could overstate income, while ignoring an actual exchange of assets could understate it. Service statements may use their own definition of profit. A tax calculation needs to identify the transaction type and the resident’s full history, not merely import a platform’s annual summary without checking it.

Guidance can improve the clarity of existing law, but cannot on its own change the commencement date set by Parliament. Exchanges are preparing systems for the current schedule while asking the government for answers. If legislation postpones the levy, the guidance may still reveal how authorities intend to treat complex activity when the rules eventually begin. If the law remains in place, the time between November publication and January start will be short for firms to adjust their reporting software.

Losses do not behave like a stock portfolio

Under the planned system, annual crypto income is aggregated and the 2.5 million won basic deduction applies to the annual amount. The tax debate has focused partly on whether losses from one year can be carried into later years. Lawmakers have objected that the draft framework does not provide a general loss carryforward comparable with some other investment tax arrangements. A person who loses money in a later year may not recover tax paid on an earlier year’s gains simply because their long-run trading account is down.

Suppose someone realizes 10 million won of net qualifying gain in one year and a 10 million won net loss the next. The first year may give rise to tax above the deduction, while the second year’s loss does not automatically produce a refund of the first bill. The actual result depends on the law in force, allowable offsets within each year and the taxpayer’s complete transactions. This example explains the concern; it is not a promise of a particular assessment.

The design can change behaviour around year end. A trader may want to understand when a disposal legally occurs and how annual gains and losses are aggregated. Moving an asset between wallets is not the same fact pattern as selling it to another person. A platform’s dashboard might show unrealized gains, which are not proceeds from a completed disposal under the straightforward transfer rule. Documentation of the event and time matters more than a year-end screenshot of a portfolio’s dollar value.

The comparison with stock tax is a political argument as well as a technical one. Opponents say the proposed crypto levy treats retail digital-asset investors less favourably than some stock investors. Supporters argue that income should be taxed and that improved reporting will reduce unfairness between domestic and offshore activity. Parliament can choose a later start, a larger allowance, revised loss rules or repeal, but each requires actual legislation. Public support for a delay alone does not select among those outcomes.

Records to keep while the vote is unresolved

The draft start date makes December a real planning window rather than an abstract deadline. If the tax takes effect in January, the number of coins held before the boundary and the method for establishing the opening price have to be documented. If lawmakers pass a postponement in late November or December, the immediate reason to capture that specific boundary may change, but the transaction history does not lose its value. Some holders will have acquired units at prices above any later opening value and will need that evidence. Others may have disposed of part of a position along the way, changing the quantity subject to the eventual rule.

A record of a trade should preserve both the platform’s execution report and the settlement movement where possible. A limit order can fill in several pieces at different prices and fees. An account export may display a summary in the exchange’s chosen currency while a Korean tax calculation needs a won value under the applicable rule. Conversions through stablecoins can add steps between the original purchase and the final cash withdrawal. Omitting intermediate disposals because the trader never returned to a bank account would leave an incomplete account of transfers described by the NTS.

JUST IN: South Korea moves to place cross-border stablecoin transfers under forex reporting and capital controls

The amended Foreign Exchange Transactions Act takes effect Dec. 3, 2026, introducing registration requirements for businesses handling cross-border virtual asset… pic.twitter.com/BOJziePDn7

— crypto.news (@cryptodotnews) October 23, 2026

Wallet activity can be equally hard to interpret from a public block explorer alone. An address identifies a destination, not necessarily the owner or the purpose of a transfer. A movement to another wallet under the same person’s control may be bookkeeping, while a payment to someone else can have economic consequences. Keeping notes about counterparties and control of addresses helps explain the onchain trail. The ability to see a transaction publicly does not mean the tax authority can reconstruct its original purchase cost from the chain.

People using several exchanges may find inconsistencies when they combine downloads. One report might timestamp a purchase in UTC and another in Korean Standard Time; a trade near midnight can fall on a different calendar date after conversion. Fee entries may appear as separate transactions and the unit amount credited can differ from the gross order size. Reconciliation before a filing deadline catches such differences while account access and records are still available. It also makes it easier to explain an unusual cost figure if an exchange later supplies incomplete information to the NTS.

The promised guidance may define details that change how these data are used, especially for rewards and DeFi. Saving records now does not imply that every receipt is already taxable. It lets an investor distinguish an actual receipt from a protocol display, establish whether an asset could be sold, and calculate a subsequent transfer if the rule calls for it. A clear file is useful under either political outcome. It leaves the decision about taxation to the law and the facts, rather than to gaps in a trading history.

A useful transaction file starts with dates, quantities, the asset and its price in won when acquired or disposed of, plus trading and transfer fees. It links the exchange statement to wallet transaction identifiers and records transfers between accounts owned by the same person. It also preserves lending agreements and reward notices, since their tax treatment may require additional facts under future guidance. This is a description of the data the published basis rules call for, not individualized tax advice.

The pre-start snapshot deserves special attention. Under the current NTS guide, a holder would need to know quantities owned at the December 31, 2026 boundary and the applicable prescribed market values as the year turns. If lawmakers move the tax date, the eventual opening snapshot may be later. Maintaining the historic ledger in the meantime is still useful for proving a high original cost and for reconciling how many units remain. It is much easier to save exchange exports now than to recreate them from memory after a venue changes its interface.

A large set of trades may require more than a spreadsheet pasted together from screenshots. Multiple exchanges can use different time zones and coin tickers. A wallet-to-wallet transfer may incur a network fee in the asset being moved. A split, fork or token migration can complicate how units are identified. The correct calculation depends on the final legal guidance, but clean source records permit the owner or accountant to revisit it when the rules are settled. A software-generated tax report is only as reliable as the transactions it imported and classified.

If a postponement passes, a trader should read the transitional provisions rather than assuming today’s opening basis simply rolls forward two years. If it fails, the current 2027 law and the November NTS guidance become immediately relevant. The next decisive document is an enacted amendment or the absence of one at year end. Until then, the prudent factual position is that another delay is being debated and the statute still points to January 1.

What to watch

• The parliamentary text: Check whether lawmakers actually enact a new effective date and how they rewrite the pre-start cost-basis rule.
• NTS guidance: Review the promised November treatment of staking, airdrops, forks, lending and DeFi transactions.
• The opening price method: Preserve original purchase records and the prescribed price and quantity at the eventual tax start.
• Overseas reporting: Compare Korea’s CARF rollout with the U.S. timetable and the coverage of private-wallet transactions.
• First filing date: Under the existing law, taxable 2027 income would be reported in May 2028; a statutory delay could change that schedule.

FAQ

Has South Korea delayed the tax to 2029?

No. The presidential office reportedly supports a delay and lawmakers have proposed one, but as of October 27 the legal start remains January 1, 2027.

What is the planned tax rate?

The NTS guide states a 20% national tax on qualifying annual income above 2.5 million won. A 2% local income tax brings the commonly cited combined rate to 22%.

Are existing coins taxed on all gains since purchase?

Under the published pre-2027 rule, their acquisition value is the higher of actual cost and the prescribed opening market value. The result depends on the particular asset and records.

How is the cost of multiple purchases calculated?

The NTS describes a total-average method by resident for the same virtual asset. An exchange’s single-account P&L may omit other acquisitions.

Would a sale on a foreign exchange be outside the law?

No. The location of an exchange or use of a private wallet does not by itself decide whether a resident’s qualifying income is taxable.

What about staking and airdrops?

The NTS has said it is preparing detailed guidance for November. The published general rules do not settle every reward’s timing and basis.

When would the first tax return be due?

If the January 2027 start remains, residents with relevant taxable income would generally report the 2027 year in May 2028.

Should traders discard older purchase records if the tax is delayed?

No. Original cost can still matter under the higher-of-cost-or-opening-value rule, and a changed start date would need enacted transitional language. This is educational analysis, not investment advice.

Disclaimer: This article is for information and educational purposes only and does not constitute financial or investment advice. Figures reflect regulatory filings and reporting available at the time of writing and change with each disclosure. Nothing here is a recommendation to buy, sell, or hold any security or asset. Always do your own research. Information is accurate as of October 27, 2026.