Austria's Flat-Rate Rule Traps Bitcoin Sellers with Missing Cost Basis

Austria's tax laws for Bitcoin sales can be tricky to navigate, especially when it comes to determining the original acquisition costs. For investors who have held onto their coins for years, the cost basis may no longer be available due to old exchanges shutting down or CSV files being lost.

In such cases, Austrian crypto service providers are required to withhold capital gains tax based on a statutory flat-rate rule. This means that 50 percent of the sale proceeds is assumed as the acquisition costs, and the remaining amount is taxed at a rate of 27.5 percent.

However, this flat-rate calculation may not always be accurate. If the actual acquisition costs are higher than the assumed amount, the investor may end up paying more tax than necessary. In some cases, it may even be possible to correct the cost basis later on and receive a refund for any overpaid taxes.

Reconstructing old exchange accounts, bank statements, and blockchain data can help investors determine their actual acquisition costs and avoid any potential issues with the tax authorities.