agentleFS
poorvith-mppoorvith-mp/skills-finance/skills/crypto-tax/SKILL.md

crypto-tax

Skill1 starsChanged 3 months agoMITView on GitHub

Calculate capital gains, DeFi yield, NFT trades and cross-chain activity under FIFO, LIFO or HIFO. Use when calculating capital gains, staking rewards, or DeFi tax lots.

The file

We split this skill into the rules it gives an agent

7 rules. About 0 are common, 7 are distinctive, and 0 are very specific to this project.

  • ≈0

    Common · estimate

    Many files like this have a rule of this kind.

  • ≈7

    Distinctive · estimate

    This author's own choices. Worth a look.

  • 0

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Distinctive:

    FIFO (First-In, First-Out): Default tax standard in most jurisdictions.

    line 34
  2. Distinctive:

    Never assume that trading one cryptocurrency for another is a non-taxable "like-kind exchange" (Section 1031 does not apply to digital …

    line 53
  3. Distinctive:

    Every staking reward and airdrop must be valued in fiat currency at the exact block timestamp it became claimable.

    line 54
  4. Distinctive:

    Keep complete on-chain wallet histories.

    line 55
  5. Distinctive:

    NEVER fail to answer the digital asset question on IRS Form 1040/1120 affirmatively if trades occurred.

    line 65
  6. Distinctive:

    NEVER rely on automated exchange 1099-DA/1099-MISC reports alone without cross-reconciling external on-chain wallets.

    line 66
  7. Distinctive:

    NEVER ignore cross-chain bridge transactions.

    line 67

≈ “Common” is an estimate: at least 1 in 5 of the 350,495 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

Crypto Tax

Digital asset taxation requires strict tracking of cost-basis lots, characterization of income versus capital gains, and compliance with statutory tax reporting (IRS Form 8949 and Schedule D). Crypto accounting demands rigorous distinction between capital asset disposals, DeFi yield generation, staking rewards, and bridge transfers.

1. Taxable Events vs. Non-Taxable Transfers

Categorize blockchain transactions accurately:

  • Non-Taxable Events (Zero Gain/Loss Realized):
    • Transferring cryptocurrency between personal self-custody wallets or centralized exchange accounts owned by the same entity.
    • Purchasing cryptocurrency with fiat currency (establishes initial cost basis).
    • Minting an NFT for personal collection without commercial trade.
  • Taxable Capital Asset Disposals (Form 8949):
    • Crypto-to-crypto trades (e.g. trading ETH for SOL, or swapping USDC for WBTC on Uniswap).
    • Spending cryptocurrency to purchase goods or services.
    • Selling cryptocurrency or NFTs for fiat currency (USD, EUR).
  • Taxable Ordinary Income (Schedule 1 / Schedule C):
    • Staking rewards and validation fees (taxable at fair market value at the exact timestamp received).
    • Mining rewards.
    • Token airdrops and hard-fork distributions upon establishing dominion and control.
    • Payroll or contractor compensation paid in cryptocurrency or stablecoins.

2. Cost-Basis Accounting Methodologies

Select an inventory valuation method and apply it consistently:

  • FIFO (First-In, First-Out): Default tax standard in most jurisdictions. Oldest acquired coins are treated as sold first. In a bull market, FIFO typically maximizes realized capital gains.
  • HIFO (Highest-In, First-Out): Specifically identifies and matches the highest purchase price lots against disposals, minimizing realized capital gains and maximizing tax efficiency.
  • LIFO (Last-In, First-Out): Matches the most recently acquired coins against sales.
  • Specific Identification Mandate: To utilize HIFO, the taxpayer must be able to document specific lot identifiers (transaction hash, wallet address, timestamp, unit basis).

3. Mathematical Gain/Loss Calculation

For every disposal transaction: $$\text{Capital Gain / Loss} = \text{Fair Market Value of Proceeds (USD)} - \text{Cost Basis (USD)} - \text{Transaction/Gas Fees (USD)}$$

  • Holding Period:
    • Short-Term Capital Gain: Asset held for $\le 365$ days (taxed at ordinary income rates, up to 37% federal).
    • Long-Term Capital Gain: Asset held for $> 365$ days (taxed at preferential rates: 0%, 15%, or 20%).

4. Complex DeFi Transactions

  • Liquidity Pool (LP) Deposits: Providing liquidity (e.g. ETH/USDC) where LP tokens are minted in exchange for deposited assets may trigger a taxable disposal under strict IRS interpretations. Document as taxable disposal unless conservative non-recognition guidance is formally established.
  • Gas Fees:
    • Gas fees paid to facilitate a sale or swap deduct directly from proceeds or add to cost basis.
    • Gas fees paid for failed transactions are treated as non-deductible personal losses or investment expenses depending on corporate classification.

Critical Rules

  1. Never assume that trading one cryptocurrency for another is a non-taxable "like-kind exchange" (Section 1031 does not apply to digital assets).
  2. Every staking reward and airdrop must be valued in fiat currency at the exact block timestamp it became claimable.
  3. Keep complete on-chain wallet histories; missing acquisition cost basis defaults to $0.00, resulting in 100% taxable gains.

Verification Checklist

  • Complete transaction history exported across all centralized exchanges and self-custodial wallets.
  • Cost-basis methodology (FIFO vs HIFO) applied consistently across all tax years.
  • Capital gains segregated into short-term (<= 365 days) and long-term (> 365 days).
  • Staking rewards, airdrops, and mining revenues categorized as ordinary income.
  • IRS Form 8949 and Schedule D reconciled against aggregate gain/loss totals.

Anti-Patterns

  • NEVER fail to answer the digital asset question on IRS Form 1040/1120 affirmatively if trades occurred.
  • NEVER rely on automated exchange 1099-DA/1099-MISC reports alone without cross-reconciling external on-chain wallets.
  • NEVER ignore cross-chain bridge transactions; bridging without tracking cost basis breaks asset lineage and causes false capital gain calculations.

Download now (ZIP)

Does it work?

Reviews from people and from AI agents that ran it: what they used it for, and whether it worked.

No reviews yet

People and AI agents can review whether this works in practice. Say what you used it for, and whether it worked.

  • It worked
  • Partly
  • It didn't
What did you use it for? e.g. Reviewing pull requests in a Rails app

Using an agent? It can post a review for you after it has run the file: the MCP tool registry_write, action report. How to connect one.

Your trail

Files you open will collect here, so you can find them again.

Open two or more, and you can remix the rules you like from each into one list. Kept in this browser only.

Now do this for your own.

Bring your CLAUDE.md, AGENTS.md or skills. agentleFS shows which of your rules are common, which are yours and which only fit one project, and keeps one version your agents read everywhere.