Quick answer: Starting January 1, 2025, the IRS changed how crypto investors must calculate cost basis for tax purposes. Instead of pooling all your crypto holdings together across every wallet and exchange (the old universal method), you’re now required to track cost basis separately for each individual wallet or exchange account. If you didn’t proactively choose an accounting method and allocate your holdings before this deadline, the IRS defaults you into First In, First Out (FIFO) for each wallet, which can result in a higher taxable gain than other methods would have produced.
If you’ve been investing in crypto for a while and manage holdings across multiple wallets or exchanges, there’s a real chance this rule change affects your tax bill, whether or not anyone told you about it directly. This is one of the most significant, and most quietly rolled out, changes to crypto tax reporting in years, and a surprising number of investors and even some tax preparers are still catching up to it.
What Actually Changed
Under the old system, most crypto investors used what’s often called the universal or multi-wallet method. If you owned Bitcoin across three different exchanges and one personal wallet, you could treat all of those holdings as one combined pool for cost basis purposes. When you sold, you could apply your chosen accounting method (like FIFO or specific identification) across that entire combined pool, regardless of which specific wallet the coins being sold actually came from.
Under IRS guidance that took effect January 1, 2025, that’s no longer allowed. Cost basis must now be tracked and calculated separately, wallet by wallet or exchange account by exchange account. Coins held in your Coinbase account are treated as a separate cost basis pool from coins held in a self-custody wallet, which is separate again from coins held on a different exchange, even if they’re technically the exact same asset.
Why This Matters More Than It Sounds
This isn’t just a bookkeeping technicality, it can genuinely change how much tax you owe. Under the old pooled method, you had flexibility to sell whichever specific coins (in whichever wallet) produced the most favorable tax outcome, since everything was tracked as one combined pool. Under the new wallet-specific method, if a particular wallet only contains coins purchased at a high price, you’re locked into using that wallet’s specific, potentially less favorable cost basis when you sell from it, even if you technically hold cheaper coins of the same asset elsewhere.
There was a one-time transition step tied to this change: investors needed to reasonably allocate their existing total cost basis across their various wallets and accounts before the rule took effect, using a reasonable method applied consistently. If that allocation wasn’t done, the IRS default is FIFO calculated separately within each wallet, which often is not the most tax-efficient outcome, particularly for anyone who has bought crypto at many different price points over time.
How to Actually Comply Going Forward
- Identify every wallet and exchange account where you hold crypto, including exchanges you may not have used actively in a while but still hold a balance on.
- Determine whether you already completed a reasonable allocation of your cost basis across those wallets before the transition deadline. If you’re unsure, this is worth confirming with a tax professional rather than guessing, since it affects every sale going forward.
- Choose and consistently apply an accounting method within each wallet separately, such as FIFO or specific identification, rather than assuming you can apply one method across your combined holdings the way the old rules allowed.
- Use crypto tax software that supports wallet-specific cost basis tracking. Not all crypto tax tools updated to reflect this change at the same pace, so it’s worth confirming your specific software explicitly supports per-wallet calculation before relying on its output.
- Keep detailed records for each wallet separately going forward, including purchase dates, amounts, and prices, since reconstructing this retroactively across multiple platforms is significantly harder than tracking it as you go.
How This Connects to Form 1099-DA
Alongside this cost basis change, crypto brokers and exchanges are now required to report digital asset transactions to both you and the IRS using a new form, Form 1099-DA, similar in spirit to how stock brokers report transactions on Form 1099-B. This reporting requirement means the IRS increasingly has direct visibility into crypto transaction activity on major exchanges, which makes accurate self-reporting, including correctly applying the wallet-by-wallet cost basis rule, more important than ever, since mismatches between what you report and what a broker reports are more likely to be noticed.
What This Means for DeFi and Self-Custody Wallets
Self-custody wallets and decentralized finance activity add another layer of complexity here, since there’s no broker generating a 1099-DA to help you reconstruct your cost basis. If you move coins between a self-custody wallet and an exchange, that specific wallet’s cost basis history moves with the coins, which means keeping accurate records at the point of transfer matters even more than it did under the old pooled system, where the specific wallet history was less consequential.
A Note on Wash Sales
It’s worth mentioning, since it often comes up in the same conversation, that the wash sale rule, which prevents claiming a tax loss on a security sold and quickly repurchased, has historically not applied to cryptocurrency the way it applies to stocks, since crypto isn’t classified as a security under current rules. This means crypto investors can, under current law, sell an asset at a loss and repurchase it shortly after while still claiming the loss, something stock investors cannot do. This is a separate issue from the wallet-by-wallet cost basis rule, but the two are frequently confused, and it’s worth understanding both distinctly since tax law in this specific area continues to evolve.
Frequently Asked Questions
Do I need to track crypto cost basis separately for each wallet now?
What happens if I never allocated my cost basis before the deadline?
Does this rule apply to self-custody wallets, or only exchanges?
What is Form 1099-DA and how does it relate to this rule?
Should I use crypto tax software to manage this, or handle it manually?
Disclaimer: This article is for general educational purposes only and does not constitute personalized tax or legal advice. Tax rules and IRS guidance regarding cryptocurrency continue to evolve and can change. Consult a qualified tax professional familiar with cryptocurrency reporting for guidance specific to your situation.
This Post Has 2 Comments