Crypto Cost Basis for High Net Worth Investors: Wallet-by-Wallet Tracking After Rev. Proc. 2024-28

Last Updated: October 2026

Key Takeaways

• Rev. Proc. 2024-28 eliminates the “universal wallet” method effective January 1, 2025; taxpayers must now track cost basis on a wallet-by-wallet and account-by-account basis under Treas. Reg. § 1.1012-1(j) .
• HNWIs who failed to make a timely safe harbor allocation are now locked into their January 1, 2025 allocations and cannot retroactively reallocate basis across wallets .
• Unsubstantiated basis means zero basis: if wallet-by-wallet records cannot be produced, the IRS may treat the entire sale proceeds as taxable gain .
• IRS Notice 2025-7 (extended by Notice 2026-4) provides temporary relief through December 31, 2026, allowing flexible identification methods for broker-held assets .
• Accuracy-related penalties of 20% (negligence) or 75% (fraud) may apply to basis overstatements, plus potential criminal exposure in extreme cases .

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Introduction

Crypto cost basis tracking for high net worth investors has fundamentally changed. Before 2025, many sophisticated taxpayers treated all cryptocurrency holdings across exchanges, wallets, and cold storage as a single “universal wallet,” cherry-picking the highest basis lots regardless of where the assets were held . Rev. Proc. 2024-28, issued alongside final regulations under I.R.C. § 1012(c), eliminates that approach for tax years beginning on or after January 1, 2025 . The stakes for HNWIs are significant: cryptocurrency portfolios often span dozens of wallets and exchanges, each with distinct acquisition dates and basis amounts.

What Is Wallet-by-Wallet Cost Basis Tracking? Definition and Statutory Basis

Wallet-by-wallet cost basis tracking requires taxpayers to determine gain or loss using only the basis of digital assets held in the same wallet or account from which the asset was sold, disposed of, or transferred. The statutory authority derives from I.R.C. § 1012(c), which requires basis determinations to be made on an account-by-account basis for “specified securities” . The 2024 final regulations (T.D. 10000) extend this account-by-account principle to digital assets under Treas. Reg. § 1.1012-1(j) .

Definitions

Digital Asset: Any digital representation of value recorded on a cryptographically secured distributed ledger or similar technology, as defined in Treas. Reg. § 1.6045-1(a)(19) .

Wallet: A digital asset storage mechanism, which may be a hosted wallet (custodied by a broker or exchange) or an unhosted wallet (self-custodied, such as hardware or software wallets).

Unused Basis: The basis of digital asset units that have been sold or disposed of but for which the basis was not previously allocated to remaining units, used in the transition safe harbor under Rev. Proc. 2024-28 .

Specific Identification: The method by which a taxpayer identifies the particular units of a digital asset to be sold by reference to purchase date, time, or price, sufficient to determine basis and holding period .

FIFO (First-In, First-Out): The default ordering rule when specific identification is not made; the earliest acquired units within a wallet or account are deemed sold first .

Binding Effect and Legal Weight

Rev. Proc. 2024-28 is binding IRS guidance that taxpayers may rely on for the transition safe harbor, but the underlying basis rules in Treas. Reg. § 1.1012-1(j) have the force of law as final regulations. The revenue procedure provides procedural relief rather than substantive tax law, while the regulations carry the weight of Treasury Department interpretation.

Authority Type	Source	Binding On	Precedential Value
Statute	I.R.C. § 1012(c)	IRS, Courts, Taxpayers	Supreme; account-by-account requirement
Treasury Regulation	Treas. Reg. § 1.1012-1(j)	IRS, Taxpayers	High; final regulations apply Jan. 1, 2025
Revenue Procedure	Rev. Proc. 2024-28	IRS (safe harbor); Taxpayers may rely	Procedural; transition relief
IRS Notice	Notice 2025-7; Notice 2026-4	IRS (relief); Taxpayers may rely	Temporary; expires Dec. 31, 2026

• The final regulations are legislative in nature under § 1012(c)(2), giving them the force of law.
• Rev. Proc. 2024-28 creates a safe harbor, meaning compliance is deemed reasonable, but non-compliance does not automatically trigger penalties if the taxpayer has other substantial authority .
• Notice 2026-4 extends the relief period through December 31, 2026, allowing additional identification methods for broker-held assets during the transition .

Key Authorities and Cases

Statutory Authority

I.R.C. § 1012(a) establishes the general rule that basis equals cost, while § 1012(c) requires account-by-account determinations for specified securities and directs the Secretary to prescribe conventions by regulation. The statute provides the foundational authority for the wallet-by-wallet approach: basis is determined by reference to the cost of the specific property disposed of, and for digital assets, the “account” is the wallet or exchange account .

• § 1012(a): “The basis of property shall be the cost of such property” .
• § 1012(c)(1): Conventions for basis determination “shall be applied on an account by account basis” .
• § 1012(c)(3): “Specified security” and “applicable date” take their meanings from § 6045(g).

Treasury Regulations

Treas. Reg. § 1.1012-1(j), issued June 28, 2024, applies wallet-by-wallet tracking to all digital asset acquisitions and dispositions on or after January 1, 2025. The regulation provides distinct rules for broker-held and self-custodied assets .

• § 1.1012-1(j)(3)(i): For broker-held assets, if no specific identification is made, units are deemed sold in FIFO order within that account .
• § 1.1012-1(j)(3)(ii): Taxpayers may specifically identify units by notifying the broker no later than the date and time of sale .
• § 1.1012-1(j)(2): For unhosted wallets, taxpayers identify units on their own books and records by reference to purchase date, time, or price .
• Applies to all acquisitions and dispositions on or after January 1, 2025 .

IRS Guidance

Rev. Proc. 2024-28 provides the transition safe harbor, allowing taxpayers to allocate unused basis to wallets or accounts as of January 1, 2025, using either specific unit or global allocation methods. The procedure was issued contemporaneously with the final regulations to assist taxpayers transitioning from universal wallet tracking .

• Specific Unit Allocation: The taxpayer identifies specific unused basis units and allocates them to specific remaining digital asset units in each wallet .
• Global Allocation: The taxpayer orders all unused basis units by prescribed characteristics (e.g., earliest acquisition date, highest basis) and allocates them successively to wallets on a prescribed basis .
• Deadline: The allocation must be completed before the earlier of the first sale of the same digital asset in 2025 or the due date (including extensions) of the 2025 return .
• Notice 2025-7 (extended by Notice 2026-4): Provides temporary relief through December 31, 2026, allowing taxpayers to use flexible identification methods for broker-held assets during the transition period .

Key Case Law

No court has yet interpreted the wallet-by-wallet basis rules, as they took effect only on January 1, 2025, and the first tax returns under the new regime are not yet subject to audit. The foundational principle—that basis must be substantiated—derives from longstanding case law requiring taxpayers to maintain adequate records.

• I.R.C. § 6001 requires taxpayers to keep records sufficient to determine their tax liability .
• The “zero basis” default: If basis cannot be substantiated, the IRS may treat the entire proceeds as gain, as noted by tax practitioners .
• No published guidance has addressed whether the “reasonable allocation” requirement under Rev. Proc. 2024-28 is satisfied by particular fact patterns .

Practical Application in Tax Practice

HNWIs with cryptocurrency holdings across multiple exchanges, hardware wallets, and DeFi protocols must now maintain separate basis ledgers for each wallet and account, reconstructing records where necessary, and documenting identification conventions before any 2026 dispositions. The practical burden is substantial for investors who acquired assets across many platforms over years without tracking location-specific basis.

• Inventory every wallet and account: List all exchanges, hosted wallets, hardware wallets, and software wallets; identify which assets are held in each.
• Reconstruct acquisition records: For each wallet, map every acquisition (purchase, airdrop, fork, transfer in) with date, time, quantity, and cost basis .
• Document identification conventions: For broker-held assets, establish whether specific identification or FIFO will be used; for unhosted wallets, maintain books and records showing the method .
• Complete safe harbor allocation (if not already done): The Rev. Proc. 2024-28 safe harbor deadline has passed for most taxpayers (the 2025 return due date), but Notice 2025-7 relief may provide additional flexibility .
• Prepare for Form 1099-DA: Brokers will report gross proceeds starting 2025 and basis starting 2026; taxpayer records may not match broker statements, requiring reconciliation .
• Consider penalty exposure: Accuracy-related penalties of 20% or 75% may apply if basis is overstated without substantial authority .

Interaction with Other Authorities

The wallet-by-wallet basis rules interact with broker reporting under § 6045 and the new Form 1099-DA, creating potential mismatches between broker-reported basis and taxpayer-computed basis that require reconciliation on Form 8949. The final regulations phase in reporting: gross proceeds for 2025 transactions, basis for 2026 transactions .

• Broker reporting vs. taxpayer records: Brokers report basis only for assets held in custody; self-custodied assets and cross-wallet transfers require taxpayer tracking .
• Notice 2026-4 relief: Allows taxpayers to use additional identification methods during the relief period (through Dec. 31, 2026), but does not affect broker reporting obligations .
• Non-US broker rules deferred: The final regulations reserved on non-US broker reporting to coordinate with OECD CARF; expected to begin in 2028 for 2027 transactions .
• DeFi and non-custodial platforms: The final regulations do not apply to decentralized or non-custodial brokers, leaving a gap for HNWIs using DeFi protocols .

Frequently Asked Questions

What is the “universal wallet” method and why is it no longer allowed?

The universal wallet method treated all cryptocurrency holdings across every exchange and wallet as a single pool, allowing taxpayers to cherry-pick the highest basis lots regardless of location. Rev. Proc. 2024-28 and Treas. Reg. § 1.1012-1(j) eliminated this approach effective January 1, 2025, requiring basis to be determined wallet-by-wallet and account-by-account . Taxpayers who failed to allocate basis before the safe harbor deadline are now locked into their existing allocations .

What happens if I didn’t make a safe harbor allocation under Rev. Proc. 2024-28?

Taxpayers who failed to complete a safe harbor allocation by the deadline are “locked in” to whatever basis allocations existed as of January 1, 2025, and cannot retroactively reallocate basis from one wallet to another. The safe harbor deadline was generally the due date (including extensions) of the 2025 return . Notice 2025-7 and Notice 2026-4 provide limited additional relief for identification methods but do not extend the core allocation deadline .

How does the IRS determine basis if I don’t have wallet-by-wallet records?

If a taxpayer cannot substantiate separate wallet-by-wallet basis, the IRS may treat the sale as having zero cost basis, meaning the entire proceeds become taxable gain. Tax practitioners note that shaky basis records will require reconstruction of 2025 records through inventorying every wallet and mapping each acquisition and disposal . Accuracy-related penalties of 20% for negligence or 75% for fraud may also apply .

What is the temporary relief under Notice 2026-4?

Notice 2026-4 extends the relief period from Notice 2025-7 through December 31, 2026, allowing taxpayers to make adequate identification for broker-held assets using flexible methods during the transition. Taxpayers may identify units by recording a standing order on their books, provided it contains sufficient information and is entered before the sale . The relief does not apply to assets not held in broker custody and does not affect broker reporting obligations .

Will my broker report my cost basis correctly on Form 1099-DA?

Brokers will begin reporting basis on Form 1099-DA for transactions occurring on or after January 1, 2026, but the reported basis may not match your taxpayer records if you used specific identification methods or hold assets across multiple wallets. The IRS acknowledged that during the relief period, broker-reported acquisition dates and basis may not match the taxpayer’s lot identification . Taxpayers must reconcile any discrepancies on Form 8949 and maintain documentation supporting their computed basis .

Conclusion

The wallet-by-wallet cost basis regime under Rev. Proc. 2024-28 and Treas. Reg. § 1.1012-1(j) marks a fundamental shift in how HNWIs must track cryptocurrency basis. The universal wallet method is gone; basis must now be substantiated for each specific wallet and account. HNWIs who failed to make a timely safe harbor allocation face locked-in allocations that may not reflect optimal tax outcomes, and those without adequate records risk zero-basis treatment on audit.

Limitations: This article addresses federal income tax treatment under current law as of October 2026. Notice 2026-4 relief expires December 31, 2026. State tax treatment may vary. Non-US broker reporting rules remain subject to future guidance. No attorney-client relationship is created.

Author Bio: Alan Goldstein is an Enrolled Agent and researcher with 26 years of experience in federal and state tax controversy. He advises high-net-worth families and closely held businesses on income-shifting strategies, charitable planning, and IRS audit defense.

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