Binance Smart Chain (BNB Chain): DeFi and taxation in Spain

BNB Chain (formerly Binance Smart Chain) is a high-throughput, low-fee EVM-compatible blockchain. Their DeFi ecosystem is huge: PancakeSwap, Venus, Alpaca Finance and hundreds more. The tax treatment of operations on BNB Chain follows the same rules as Ethereum.

BNB as an asset: profits and losses

BNB(Binance Coin) is an investment asset like any other:

• Purchase/sale: Capital gain or loss (savings base, rate 19-28%).
• FIFO Method: Mandatory.
• BNB Swaps ↔ another token: Each swap is a transmission and generates a taxable event.

BNB Staking: burning and BEP-95

Binance periodically burns BNB (deflationary mechanism). BNB holders do not directly receive these burns as returns; The effect is that the price rises due to lower supply. This mechanism does not generate a direct tax event for the owner.

BNB Staking on Beacon Chain

The Binance Beacon Chain (BNB Beacon Chain) has validators:

• Validation rewards → return on capital.
• Approximate APY: variable, typically 3-8%.

PancakeSwap – BNB Chain's flagship DEX

PancakeSwap is the Uniswap of BNB Chain, with liquidity pools, yield farming and lotteries.

Swaps on PancakeSwap

Each swap (BNB → TOKEN or TOKEN → BNB) is a transmission:

• Capital gain or loss on the transferred asset.
• The asset received enters the market acquisition cost at that time.

Yield farming on PancakeSwap

CAKE tokens received as a reward for farming:

• Performance of movable capital at the time of receipt.
• Its price at that moment sets the acquisition cost.
• When you sell them: capital gain/loss.

Liquidity pools on PancakeSwap

Same treatment as Uniswap (see article on liquidity pools):

• Entry: possible gain/loss on deposited assets.
• Commissions: return on capital.
• Impermanent loss: only deductible when the loss materializes when withdrawing.

Venus Protocol (lending and borrowing)

Venus is the Aave of BNB Chain:

• Lend assets and receive vTokens → possible transfer + interest as capital.
• Borrow with BNB collateral → debt, without tax event itself; Collateral liquidation in case of margin call does generate an event.

Bridges between BNB Chain and other networks

Move assets between BNB Chain and Ethereum or other networks using bridges:

• You deliver an asset on one network and receive one "wrapped" on another.
• This exchange can be a transfer (taxable event).
• If the bridge uses own accounts (custodial), it can be analogous to a own transfer.

The most prudent approach is to treat it as a transfer for tax purposes, unless you can prove that the asset on both networks is yours at all times.

##Trade log on BNB Chain

• BscScan: BNB Chain Explorer. Allows you to see all transactions in a wallet.
• Export CSV: From BscScan you can export transaction history.
• declaracrypto.es: Automatic import of BNB Chain history by connecting the wallet.

Updated: April 2026 | Fiscal year: 2025