Polymarket Hack: How a Crypto Tax Calculator Helps with Stolen Funds
A recent exploit on Polymarket has left users wondering about their tax obligations. Hackers stole millions in crypto from the prediction market platform. Polymarket has promised refunds, but the incident raises questions about reporting stolen assets. A crypto tax calculator can help you determine your losses and file correctly.
What Happened in the Polymarket Exploit?
On June 25, 2026, Polymarket disclosed that attackers compromised its website through a third-party vendor. The breach allowed scammers to swipe millions in cryptocurrency from user accounts. Polymarket stated it would refund affected users. The platform is working with law enforcement. This incident is a reminder that even reputable platforms can be vulnerable.
Tax Implications of Stolen Crypto
When your crypto is stolen, you may be able to claim a theft loss deduction. In the US, the IRS allows this under certain conditions. You need to report the theft on your tax return. A crypto tax calculator can help you compute the loss amount. It considers the fair market value at the time of theft. This ensures you claim the correct deduction.
How to Report Stolen Crypto on Your Taxes
To report stolen crypto, you must document the theft. Keep records of the transaction history and any communication with the platform. Use crypto tax software to generate a report. The software can track your cost basis and calculate the loss. You then enter this on Form 4684 (Casualties and Thefts) for US taxpayers. For other jurisdictions, consult local rules. A crypto tax calculator simplifies this process.
Refunds and Tax Treatment
Polymarket's refunds may also have tax consequences. If you receive a refund, it could be considered a recovery of your lost funds. You may need to adjust your previous loss deduction. This is where a crypto tax report becomes essential. It helps you track both the theft and the refund. You can then accurately report the net impact on your taxes.
Using a Crypto Tax Calculator for Theft Losses
A crypto tax calculator automates the calculation of your loss. You input the stolen amount and the date. The calculator uses historical price data to determine the value. It then applies the relevant tax rules. This saves time and reduces errors. Many crypto tax software options include this feature. They also generate reports for your tax preparer.
Preventing Future Tax Issues
To avoid tax complications from hacks, keep detailed records. Use a crypto tax software to track all transactions. Regularly update your portfolio. Enable security features like two-factor authentication. If you are affected by an exploit, act quickly. Calculate your losses with a crypto capital gains calculator. Then file an amended return if needed.
Illustrative Scenario
To illustrate how this applies in practice, consider the following scenario: Michael, a US-based crypto trader, had $10,000 in USDC on Polymarket when the hack occurred. He lost the entire amount. Polymarket refunded him $10,000 two weeks later. Michael uses a crypto tax calculator to determine his tax position. He reports a $10,000 theft loss on his 2026 return. When he receives the refund, he adjusts his income accordingly. The calculator helps him avoid double counting.
Source: Decrypt