The Internal Revenue Service has begun receiving digital-asset trading reports from exchanges in earnest this year, but investors are facing a heavier tax-filing burden because cost-basis information is missing.
Cointelegraph reported on September 25 that U.S. digital-asset investors are using the newly introduced Form 1099-DA to file taxes on 2025 transactions. Form 1099-DA is the tax document digital-asset brokers, including exchanges, use to report customers’ digital-asset sales to the IRS.
The problem is that for 2025 transactions, brokers are required to report proceeds, or the amount a digital asset was sold for, but generally not cost basis, which shows how much the investor originally paid. For example, if an investor bought Bitcoin for $9,000 and sold it for $10,000, the actual profit is $1,000. But the IRS may receive only the $10,000 sale amount.
As a result, investors must review their full transaction history across exchanges and personal wallets to calculate actual gains and losses. Those who moved digital assets between multiple exchanges and self-custodied wallets may have to trace purchase prices, fees, and deposit and withdrawal records over several years.
Confusion is already emerging in the filing process. In a survey of 1,000 U.S. investors conducted last month by crypto tax service provider Awaken Tax, 21% of respondents who had applied for or planned to apply for a filing extension said they still had not received the necessary information from an exchange or platform. About 20% also said the 1099-DA they received was incomplete or that they were unsure whether it accurately reflected their transaction history.
Tax professionals are also finding cases in which exchange-issued 1099-DA forms do not match investors’ actual transaction records. Sharon Yip, founder of Crypto Tax Advisors, said some clients found missing transactions on their 1099-DA forms, while document formats and the way cost basis was presented varied by exchange.
The IRS now has greater visibility into investors’ digital-asset sales, but the information needed to calculate actual taxable income remains insufficient, industry participants say. Andrew Gordon, managing director at Digital Asset Tax Action, said 1099-DA reports only 2025 proceeds, improving the IRS’s visibility, but the absence of cost-basis data creates a “zero cost basis” problem.
