Understanding Cryptocurrency: Its Mechanism and Tax Calculation

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Cryptocurrency, often referred to as virtual currency, has gained significant attention as an asset class, especially in an era where asset management is increasingly important. This digital asset allows for online payments, exchanges with legal tender, and transactions among a wide range of users. Unlike traditional currencies backed by governments, cryptocurrency lacks underlying assets, leading to high price volatility. This article explains how cryptocurrency works and its tax implications.

What Is Cryptocurrency?

Cryptocurrency is a form of digital or virtual currency that uses cryptography for security. It operates on decentralized networks based on blockchain technology—a distributed ledger enforced by a disparate network of computers. This structure allows it to exist without a central authority, making it theoretically immune to government interference or manipulation.

Key characteristics include:

Regulatory Framework for Cryptocurrency

Due to incidents like unauthorized access and loss of assets, regulatory frameworks have been developed to protect users. For instance, Japan’s "Revised Payment Services Act," enacted in 2017, introduced a registration system for cryptocurrency exchanges with the Financial Services Agency. It also mandated identity verification during account opening.

Further amendments in 2020 enhanced regulations regarding management and transaction integrity. Exchanges are now required to store assets primarily in cold wallets (offline) rather than hot wallets (online). Other measures include advertising restrictions, preferential treatment in bankruptcy, and prohibition of unfair price manipulation.

As cryptocurrency adoption grows, continuous legal improvements are expected to ensure user protection and fair trading practices.

Blockchain Technology

Blockchain is the underlying technology of most cryptocurrencies. It is a decentralized ledger that records all transactions across a network of computers. Each block in the chain contains several transactions; every time a new transaction occurs, it is added to every participant's ledger.

This decentralized nature makes it highly secure. If one block is altered, it would require altering all subsequent blocks and the collusion of the network majority. Thus, it prevents hacking and system failures that could lead to loss of assets.

Cryptocurrency vs. Electronic Money

Although both involve digital transactions, cryptocurrency and electronic money differ significantly:

FeatureElectronic MoneyCryptocurrency
Issuer/ManagerCompanies, financial institutionsNone (decentralized)
Transactions with unspecified partiesNot allowedAllowed
Value StabilityFixed (pegged to fiat currency)Highly volatile
UsabilityLimited to affiliated merchantsGlobal

Characteristics of Electronic Money

Electronic money is a prepaid payment service where cash value is stored digitally. Issued by companies, transport agencies, or retailers, it is pegged to a fiat currency like the Japanese yen. Types include prepaid, debit, and postpaid systems. It cannot be used for speculation, cash conversion (in principle), or transactions with unspecified parties.

Characteristics of Cryptocurrency

Cryptocurrency has no central issuer or manager. Its value is determined by supply and demand factors, making it highly volatile. It can be used for payments, remittances, and exchanged for fiat currencies via exchanges. This volatility also makes it a popular speculative asset.

Is Cryptocurrency Trading Taxable?

Yes, profits from cryptocurrency transactions are subject to taxation. Gains from buying and selling are generally classified as miscellaneous income. This income is subject to progressive tax rates ranging from 5% to 45%, depending on your total annual income. Including local inhabitant taxes and special reconstruction income tax, the maximum rate can reach approximately 55%.

When Are Cryptocurrency Gains Taxable?

Taxable events occur in the following scenarios:

Selling Cryptocurrency

Profits from selling cryptocurrency are taxable. The gain is calculated as the difference between the purchase price and selling price. For example, if you buy 0.1 BTC at 1 BTC = 1 million JPY and sell when 1 BTC = 3 million JPY, your profit is approximately 200,000 JPY.

Using Cryptocurrency for Payments

Using cryptocurrency for payments when it has unrealized gains (i.e., its current value is higher than the acquisition cost) triggers a taxable event. For instance, if you buy 1 BTC at 2 million JPY and use it to buy a product when it’s worth 2.5 million JPY, the 500,000 JPY gain is taxable.

Exchanging Cryptocurrency for Another Cryptocurrency

Swapping one cryptocurrency for another (e.g., using Bitcoin to buy Ethereum) is also a taxable event if there are unrealized gains. The transaction is treated as disposing of the first asset, realizing any profit or loss.

Earning Cryptocurrency Through Mining, Staking, or Lending

Other methods like airdrops (free distributions) and hard forks (chain splits) also generate taxable income when received.

When Is Tax Filing Required for Cryptocurrency?

What Is Tax Filing?

Tax filing is the process where individuals or corporations declare their income and calculate taxes owed to the government. For individuals, it covers income from January 1 to December 31, with filings due between February 16 and March 15 of the following year.

Salaried employees typically have taxes withheld at source and may not need to file unless they have additional income streams. However, self-employed individuals, freelancers, or those with income from investments like cryptocurrency must file if their miscellaneous income exceeds 200,000 JPY annually.

Holding Cryptocurrency Without Transactions

Merely holding cryptocurrency without any transactions does not trigger taxation. Only realized gains from sales, exchanges, or usage are taxable.

Annual Profits Exceeding 200,000 JPY

If your net profit from cryptocurrency trading (after deducting allowable expenses) exceeds 200,000 JPY in a year, you must file a tax return. This includes combined profits from all side businesses. Allowable expenses may include acquisition costs, withdrawal fees, trading fees, and related educational costs.

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Penalties for Not Filing Tax Returns

Failure to file when required can result in penalties:

Note: Earnings from blockchain-based games (e.g., StepN, Sorare) are also taxable as miscellaneous income. Due to complexity, consulting a tax professional familiar with cryptocurrency is advisable.

How to Calculate Cryptocurrency Income

The primary method for individuals is the Total Average Method.

Total Average Method

This calculates the average purchase price of all cryptocurrency bought during the year. The gain per unit sold is the difference between the selling price and this average cost.

Example Calculation:

Steps:

  1. Total Purchase Quantity: 5 + 5 = 10 BTC
  2. Total Purchase Cost: (5 × 2M) + (5 × 2.4M) = 22 million JPY
  3. Average Purchase Price: 22M / 10 = 2.2 million JPY/BTC
  4. Total Sale Quantity: 2 + 2 = 4 BTC
  5. Total Sale Value: 4 × 2.5M = 10 million JPY
  6. Total Cost of Sold Units: 4 × 2.2M = 8.8 million JPY
  7. Taxable Income: 10M - 8.8M = 1.2 million JPY

Are There Tax Saving Tips for Cryptocurrency?

Unfortunately, there are limited options for tax savings. Cryptocurrency gains are classified as miscellaneous income, which cannot be offset against losses from other income categories (e.g., salary or business income). Thus, strategic loss harvesting or deductions are not applicable in most jurisdictions.

How to File Taxes for Cryptocurrency Income

  1. Calculate your annual gains using the Total Average Method.
  2. Subtract allowable expenses to determine net miscellaneous income.
  3. Sum this with other income (e.g., salary, property income) to get total income.
  4. Apply deductions (e.g., basic, social insurance, medical) to arrive at taxable income.
  5. File via e-Tax online or submit paper forms to your local tax office.

Given the complexity, seeking help from a tax professional experienced in cryptocurrency is recommended.

Frequently Asked Questions

Q: Is cryptocurrency legal?
A: Yes, in most countries, but regulations vary. Always comply with local laws regarding acquisition, trading, and taxation.

Q: Do I need to report if I only have losses?
A: Losses from cryptocurrency can be carried forward in some regions to offset future gains. Check local rules or consult a tax advisor.

Q: What records should I keep for tax purposes?
A: Maintain detailed records of all transactions: dates, amounts, prices, fees, and purposes (e.g., trade, payment). Use portfolio trackers for accuracy.

Q: How are airdrops and forks taxed?
A: They are typically treated as ordinary income at their fair market value when received. Subsequent disposal may trigger capital gains tax.

Q: Can I deduct expenses related to cryptocurrency activities?
A: Yes, reasonable expenses directly related to acquiring or managing your cryptocurrency investments are deductible. This includes trading fees, software costs, and educational materials.

Q: What happens if I don't report cryptocurrency earnings?
A: You may face penalties, interest on unpaid taxes, and in severe cases, legal action. Always disclose accurately to avoid complications.

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Conclusion

Cryptocurrency offers exciting opportunities but comes with tax obligations. Profits are taxable as miscellaneous income, with rates up to 55% including local taxes. Filing is required if annual gains exceed 200,000 JPY. Non-compliance results in penalties. Given evolving regulations and complexity, professional guidance is valuable for compliant and efficient tax management.