I just started DCAing Bitcoin in January 2026 and haven't sold anything this year. Do I need to file a tax return?

Under Circular 32, if you do not generate any disposal (sell) transactions, you have no PIT obligation yet. However, I recommend you still record your purchase transactions starting from 2026 in detail — when you sell later, you will need this data to prove your cost basis. Without purchase receipts, it will be very difficult to argue with the Tax Department.

Where do I select the cost basis method on my PIT return?

Currently, the 2026 PIT return form is still being updated by the General Department of Taxation to include a specific section for digital assets. While waiting, I recommend you attach a separate document clearly stating the method you have chosen (FIFO/LIFO/Weighted Average) along with a detailed calculation table, submitted with your return. Your local Tax Department may request a specific format.

Does Circular 32 apply to transactions on international exchanges (not Vietnamese pilot exchanges)?

Yes. Circular 32 applies based on the tax obligations of a Vietnamese resident individual, regardless of which exchange you use. You must still declare transactions on Binance, OKX, Bybit, or MEXC. However, there is currently no automatic mechanism for matching data between international exchanges and the Tax Department — you should proactively declare and keep your records.

I use multiple wallets and exchanges. Do I need to calculate the cost basis for each one separately?

According to Circular 32 and international practice, you calculate cost basis at the individual level (for all the digital assets you hold), not separately for each wallet. One BTC on Binance and one BTC on a Ledger wallet are the same asset. You need to aggregate data from all wallets/exchanges to calculate a common cost basis. Software like Koinly/CoinTracker handles this well.

I chose LIFO this year. Can I switch to Weighted Average next year?

It is possible, but you need to declare it to the Tax Department with a valid reason. I recommend you carefully consider your method from the start — switching back and forth may create the impression that you are "tax optimizing" for the most beneficial year, which could lead to suspicion and a more thorough audit from the Tax Department. The general principle: choose a method that fits your investment lifestyle and apply it long-term (3-5 years).

Do I need to prove the VND price at the time of purchase/sale using a specific exchange rate?

Circular 32 allows using the exchange rate from the State Bank of Vietnam or the actual transaction exchange rate (if the transaction went through a Vietnamese pilot exchange with VND records). For crypto-to-crypto transactions (BTC to ETH), you convert via an intermediate USDT price and then apply the reference USD/VND exchange rate. I recommend you standardize one exchange rate source for the entire year (e.g., Vietcombank's daily central rate) for easy explanation.

FIFO vs LIFO vs Weighted Average under Circular 32/2026: Ch…

FIFO vs LIFO vs Weighted Average under Circular 32/2026: Choosing a Crypto Cost Basis Method for Vietnamese Individuals

Cập nhật: 10 tháng 5, 2026

Circular 32/2026/TT-BTC officially allows individuals to choose one of three cost basis methods when declaring taxes on digital asset transactions: FIFO (First-In, First-Out), LIFO (Last-In, First-Out), and Weighted Average. This choice may sound technical, but it directly impacts the amount of tax you owe — the difference between methods for the same portfolio can be as high as 30-40%. This article analyzes each method with three specific Vietnamese examples, record-keeping guidelines, and a procedure for exporting data from Binance, OKX, and Bybit.