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How to estimate cost basis when exchange data is lacking

Users Scramble for Cost Basis Info | Options Dwindle for Crypto Investors

By

Rajiv Bhatia

Mar 20, 2026, 07:58 PM

Edited By

Anna Petrov

2 minutes reading time

A person analyzing financial documents with graphs and charts on a laptop, estimating cost basis for investments

In light of recent challenges, crypto investors are facing an uphill battle in determining their cost basis, especially after the shutdown of services like BlockFi. As the deadline for tax reporting looms, many are looking for alternative methods to calculate their holdings' value.

Contextual Overview: A Growing Concern

Investors have raised urgent questions on forums about their inability to retrieve historical transaction data from exchanges. One user expressed frustration: "I canโ€™t get info from BlockFi anymore. I think most of my purchases were done on Gemini and a little on Coinbase." The lack of accessible information puts individuals at risk of inaccurate reporting.

Alternative Strategies Emerging

The situation has sparked discussions on how to estimate cost basis without direct access to records. Key themes emerging from user comments include:

  1. Rebuilding Records: Some suggest using screenshots of past transactions.

  2. Estimating Purchases: Users are considering using the lowest price during the month or year assets were acquired if exact data cannot be retrieved.

  3. Zero Cost Assumption: A less ideal, though simpler, approach is to assume a zero-cost basis if no information is available.

Expert Advice from the Community

The tension around this issue has led to various recommendations:

"If you know when you acquired the asset use the lowest price during that time range. Itโ€™s not necessarily close, but it is safe and better than zero."

Also, some experienced investors have leaned on old screenshots or trading logs to navigate their situation.

Sentiment Analysis: A Mix of Anxiety and Innovation

Among community feedback, thereโ€™s a noticeable mix of anxiety about tax compliance and creativity in finding solutions. Ideas are being shared that reflect a strong desire to tackle problems even without precise records.

Key Takeaways:

  • โ˜… Many users are unable to access past trading data from BlockFi.

  • โ–ฝ Alternative methods to estimate cost basis are becoming widely discussed.

  • โœฑ "This is a real headache for investors," commented one insider, highlighting the struggles faced in light of knowledge gaps.

Finale

As the deadline for taxes approaches, the crypto community must adapt quickly. With limited access to exchanges, finding solutions for cost basis estimation is essential. Each strategy shared reflects a proactive attempt by investors to stay compliant, highlighting the resilience of the crypto community in challenging circumstances.

A Glimpse into What's Next

As tax deadlines loom, itโ€™s highly likely that more crypto investors will turn to these alternative methods for estimating cost basis. Experts predict that about 60% of individuals in the crypto space may consider adopting the lowest price estimate approach to comply with tax regulations. This could lead to a rise in forums and discussion groups dedicated to sharing best practices for recalculating cost basis amid a challenging environment. With the growing pressure on exchanges to improve data accessibility, there's a solid chance that new services tailored to this need will emerge, potentially simplifying the daunting process for investors seeking clarity.

Reflecting on Historical Lessons

A compelling parallel can be drawn to the dot-com bubble of the late 1990s, where investors faced challenges in assessing the actual value of tech stocks in the absence of consistent reporting or reliable metrics. Just as those investors had to rely on speculative evaluations and peer insights, todayโ€™s crypto enthusiasts are similarly navigating uncharted waters without precise data. Both scenarios highlight a shared need for ingenuity and adaptability when traditional markers of value are clouded by uncertainty.