Coinbase converts USDT and DAI into USDC on October 30: the swap restarts the one-year holding period

If you still hold USDT, DAI or PYUSD at Coinbase in the European Economic Area, you face a decision with two different tax outcomes. On October 30, 2026 the exchange will automatically convert the remaining balances of these stablecoins into USDC. Under German law this forced swap counts as a disposal: it realises a gain or a loss, and for the USDC you receive, the one-year holding period starts from scratch. Withdraw the tokens yourself beforehand and you keep your original acquisition date. This article sets out what each route triggers, how a gain on a stablecoin arises at all, and which records the tax office wants to see.

The news itself has been on this site since October 10: Coinbase delists USDT and DAI on October 30, with the deadlines and the affected list. What that article leaves open is the question that follows, and it decides real money: whether a taxable event ends up in your return for the year, and when the clock starts running for the new balance.

Coinbase converts the remaining balances into USDC on October 30

For customers in the European Economic Area, buying, selling and swapping the affected stablecoins is already blocked. One action remains: withdrawal to your own address or to another provider. That option closes on October 30, 2026. Whatever is still in the account after that, Coinbase says it will convert into USDC at the market rate applying on the day. Tokens arriving after the cut-off will no longer be credited to the account, nor included in the conversion.

According to the provider's own breakdown, fourteen assets are affected, among them USDT, DAI, PYUSD, GUSD, PAX and GYEN. That list is the company's classification, not a regulator's. One definition first: a stablecoin is a token whose price is pegged to a fixed reference value, usually the US dollar. An e-money token in the sense of the European regulation on markets in crypto-assets is such a token whose issuer holds an authorisation for it in the European Union. That is precisely where the delisted assets fall short, and it is why only the European Economic Area is affected.

The framework behind it is the MiCA regulation and the obligations it places on crypto companies. For this topic that framework is context, not substance: the tax effect of the swap does not depend on why the exchange carries it out.

A coin-for-coin swap is a private disposal under section 23 of the Income Tax Act

Under German income tax law, crypto-assets held privately rank as other assets. They fall under section 23 of the Income Tax Act, the provision governing private disposals. The decisive term is disposal, and it reaches further than many assume: it covers any transfer to another party for consideration, and that includes swapping one token for another. The Federal Ministry of Finance circular of March 6, 2025 on individual questions of the income tax treatment of crypto-assets states expressly that the disposal period begins anew after every swap.

That the swap is involuntary makes no difference. What counts is the economic event, not the reason for it. We have traced the same line twice in our archive, most recently on the question of which timestamp applies when an exchange liquidates a position. The answer there: the moment the exchange books the transfer, not the day you find out about it.

For October 30, that means every converted balance is a closed event. If the USDT was bought more than a year earlier, the gain realised is tax free. If it was bought later than that, the gain belongs to the taxable private disposals of 2026.

With a stablecoin, the gain comes from the euro-dollar rate

This is where the obvious calculation goes wrong. Swapping USDT for USDC means trading one dollar value for another; both stand at roughly a dollar. The conclusion "no price difference, so no gain" is still false, because a German tax return is calculated in euros. Gain or loss follows from the difference between the euro equivalent at purchase and the euro equivalent on the day of the conversion. What moved in between was mainly the euro-dollar pair.

A worked example shows the order of magnitude. Suppose someone bought 10,000 USDT in May 2026, when one euro cost $1.05. The acquisition cost was therefore around 9,524 euros. If the euro stands at $1.15 on October 30, the same 10,000 dollars are worth only about 8,696 euros, which produces a loss of a good 800 euros. Reverse the move and a gain of a similar size appears in the same place. The figures are an example rather than a quotation, and the principle holds either way: the lever is the currency, not the token.

A loss is not bad news in itself. Losses from private disposals can be set against gains from other private disposals in the same year, and beyond that carried back or forward. If you realised gains on crypto sales this year, a minus from the conversion can be offset against them, provided the event falls inside the one-year period at all. Which records this requires, and which programs gather them automatically, is in our comparison of crypto tax software and portfolio trackers.

The 1,000 euro exemption limit covers all private disposals of one year together

Gains from private disposals stay tax free as long as they add up to less than 1,000 euros in the calendar year. That limit has applied since the 2024 assessment period; before that it was 600 euros. Two of its features are regularly overlooked, and both bite hardest in a forced swap.

First, it is an exemption limit and not an allowance. Exceed it and the entire gain becomes taxable, not merely the part above the line. One euro over the threshold turns 999 tax-free euros into a fully taxable amount. Second, it applies to all private disposals of a year jointly, not per position and not per exchange. Sales of other crypto-assets count towards it, as do gains from other transactions caught by the same provision.

An uncomfortable possibility follows. A forced swap can push someone over the threshold whose other transactions sat just below it, and so make gains already realised taxable after the event. Anyone close to the 1,000 euros this year is better off doing the arithmetic before October 30 than wondering afterwards.

For the USDC you receive, the one-year period restarts on October 30

The second half of the consequence concerns not the year now ending but the future of the balance. The conversion extinguishes the old position and creates a new one: USDC, acquired on October 30, 2026, at the euro equivalent applying that day. For this position the one-year holding period runs from the swap date, not from the original purchase. The earliest tax-free sale would therefore fall after October 30, 2027.

Withdrawing the USDT to your own address beforehand changes none of that. A transfer between your own addresses is not a disposal, the acquisition date survives, and a one-year period that has already expired stays expired. That is the whole difference between the two routes, and a single question settles it: does the asset change, or only where it is kept?

Where the same token was bought several times on the same exchange, the wallet-by-wallet view applies under the first-in, first-out method. The oldest units therefore count as converted first. That can work in your favour if it is precisely the oldest holdings that have already passed the one-year mark.

The December 31, 2026 cut-off in the draft bill separates old holdings from new

Now comes the circumstance that did not exist in the comparable case back in August. The Federal Ministry of Finance has a draft bill dated September 30, 2026 that would move crypto-assets into investment income and abolish the one-year period for new acquisitions. The draft draws its line at December 31, 2026: anything acquired up to that date would remain an old holding with the one-year period, anything added afterwards would fall under the new rule.

Two points matter here, and both argue against acting out of fear. First, this is a draft and not law in force. The federal cabinet did not adopt it on October 14, 2026; we have documented the current status of the holding period reform, and no new date has been set. Second, October 30 sits sixty-two days ahead of that line. The USDC from the conversion would in any case still be an old holding and would keep the one-year period, merely with an acquisition date pushed back by months.

Wait until mid-December to restructure, by contrast, and you come dangerously close to the line. That is no reason to rush, but it is a reason to keep an eye on the calendar.

Withdrawing yourself and letting it run lead to two different acquisition dates

The two routes can be set side by side. Route one, withdrawal before October 30: the tokens move to your own wallet or to another provider that still carries them. No taxable event arises, the acquisition date stands, the exemption limit is untouched. In return you take on responsibility for custody and pay network fees. Route two, let the conversion happen: you need do nothing, the balance stays with a regulated provider and ends up in a token that meets the European requirements. In return a disposal arises with all the consequences described above, and the one-year period starts again.

Which route fits better hangs on three quantities: how long the balance has been held, how close the year's other disposals sit to the exemption limit, and whether there is any appreciable euro difference between purchase and today at all. For a few hundred euros held for more than a year, the question is academic. For five-figure balances bought this year, it is not.

Without proof of acquisition date and rate, the tax office estimates

The conversion creates one line in the 2026 tax return, and nobody gathers the evidence for it on your behalf. Four pieces of information are worth securing before the cut-off, because they are harder to obtain later: the acquisition date and acquisition price of the affected tokens, the balance as at October 30, the conversion statement with quantity and exchange rate, and the euro reference rate for that day.

The reason is unglamorous. Anyone unable to document acquisition data must expect the tax office to estimate the basis of taxation, and an estimate rarely falls in the taxpayer's favour. In practice that means downloading the account statements and the transaction history now, while access to these assets still exists, rather than in the spring when the return is due.

One note on reading the numbers: tax software often records a conversion as two events, a sale of the old token and a purchase of the new one. That is correct for tax purposes, but it does mean the event shows up twice in summaries. If you check the figures by hand, expect it.

ESMA sets the outer limit at January 8, 2027, and Coinbase moves earlier

Some context, without which the date reads wrongly: the European Securities and Markets Authority published an opinion on October 8, 2026 giving trading venues three months to wind down holdings of unauthorised stablecoins. The outer limit therefore falls on January 8, 2027. We have already covered the ESMA deadline and the exit from USDT.

With October 30, Coinbase sits a good two months ahead of that limit and is acting sooner than required. Other providers in the European Economic Area may work to different dates, and so far no national supervisor has said publicly how it intends to apply the opinion. If you hold balances on several platforms, check each deadline separately rather than relying on the date you know from one exchange.

Our assessment: withdrawing before the cut-off is the route you can document

In the editorial team's view, more speaks for withdrawing before October 30 than for waiting, and for a reason that has nothing to do with prices: withdrawal is the event whose evidence you hold yourself. You choose the moment, you see the transaction, the acquisition date stays as it is, and no line arises that has to be explained later. The conversion, by contrast, happens without your involvement, at a rate you do not choose, and it creates precisely the documentation duty that makes work in the spring.

An equally solid argument points the other way: move the tokens to your own address and you take on responsibility for the private key, and a lost key costs more than any holding period. For balances held longer than a year, whose gain is tax free anyway, waiting is the more convenient choice and not the worse one. The records still matter in that case: tax free does not mean proof free. None of this is a recommendation to buy or sell crypto, and a total loss is always possible with crypto-assets.

Stablecoin forced conversion: from October 30 the one-year period runs again

Until October 30, 2026 the choice between two routes with different acquisition dates remains open. After that the exchange decides, and it decides the same way for every remaining balance. Three steps put the situation in order:

1. Establish the balance and the holding period. Look in the transaction history for when the affected tokens were bought and at what euro equivalent. If the purchase is more than a year old, a gain is tax free and the decision becomes a matter of convenience alone. If you intend to withdraw the tokens, you first need an address you control; the differences between the devices are in our comparison of crypto hardware wallets.
2. Check the destination before you transfer. Not every provider in the European Economic Area still carries the affected stablecoins, and some have set deadlines of their own. Which platforms hold an authorisation under the European regulation is shown in our overview of regulated crypto exchanges.
3. Secure the records, whichever route you take. Download the transaction history and account statements while access lasts, and record the date, quantity and exchange rate of the conversion. Which programs log all this automatically and carry it into the tax return is in our comparison of crypto tax software.

The details on the deadline and the process come from the provider's help page on restricted stablecoins. This article is no substitute for tax advice; judging an individual case belongs in the hands of a tax adviser.

(As of October 20, 2026. This article is not investment advice. Prices and fee structures change; check the terms with the provider before you buy.)