tax-calculator

tax-calculator is a skill for Claude Code, Codex from kayzaa/k.i.t.-bot. It costs 13 tokens per session (1,103 once invoked), scanned A, a copy of tax-calculator, MIT.

A cryptocurrency and trading tax calculator that matches sales with earlier purchases and prepares tax reports. FIFO, LIFO, HIFO, and specific identification are methods for choosing which tax lots count as sold.

In plain words
What is it for?
It helps prepare capital-gains summaries, income reports, cost-basis records, and IRS Form 8949 transaction lists for several listed jurisdictions.
Why use it?
It removes much of the manual work involved in calculating gains, income, cost basis, and tax-loss opportunities across trades and DeFi activity.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: positional $N argument.

Good fit It helps prepare capital-gains summaries, income reports, cost-basis records, and IRS Form 8949 transaction lists for several listed jurisdictions.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/kayzaa/k.i.t.-bot/tax-calculator
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add kayzaa/k.i.t.-bot --skill tax-calculator
Clone the repo
git clone --depth 1 https://github.com/kayzaa/k.i.t.-bot

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for tax-calculator

README.md
[![agentmods](https://agentmods.dev/badge/skills/kayzaa/k.i.t.-bot/tax-calculator/github.svg)](https://agentmods.dev/skills/kayzaa/k.i.t.-bot/tax-calculator)
Your own site
<a href="https://agentmods.dev/skills/kayzaa/k.i.t.-bot/tax-calculator"><img src="https://agentmods.dev/badge/skills/kayzaa/k.i.t.-bot/tax-calculator/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for tax-calculator

Your own site · 80×15
<a href="https://agentmods.dev/skills/kayzaa/k.i.t.-bot/tax-calculator"><img src="https://agentmods.dev/badge/skills/kayzaa/k.i.t.-bot/tax-calculator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 13 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,103 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 100% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00013 $0.01103
Opus 5 $0.00006 $0.00551
Sonnet 5 $0.00003 $0.00221
Haiku 4.5 $0.00001 $0.00110

Measured 8d ago against content hash 870869f5ecbe, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

tax-calculator scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (tax_calculator.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

100% identical to tax-calculator — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/tax-calculator/SKILL.md · 169 lines

How it starts

The opening of the file, as written. The whole thing — 169 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Tax Calculator

Calculates tax implications for your trades and generates reports for tax filing.

Features

Tax Lot Methods

  • FIFO (First In, First Out) - Default for most jurisdictions
  • LIFO (Last In, First Out) - May reduce taxes in rising markets
  • HIFO (Highest In, First Out) - Minimizes gains
  • Specific Identification - Choose which lots to sell

Supported Jurisdictions

  • 🇺🇸 United States (IRS Form 8949, Schedule D)
  • 🇩🇪 Germany (§ 23 EStG crypto, 1-year holding rule)
  • 🇬🇧 United Kingdom (HMRC CGT)
  • 🇪🇺 EU (VAT-exempt for crypto)
  • 🇨🇭 Switzerland (wealth tax)
  • 🇸🇬 Singapore (generally tax-free)

Report Types

  • Capital Gains Summary - Short-term vs long-term gains
  • Income Report - Staking, mining, airdrops, interest
  • Cost Basis Report - Full acquisition history
  • Form 8949 - IRS-ready transaction list
  • Tax Loss Harvesting - Identify loss opportunities

DeFi Support

  • Swap transactions
  • Liquidity provision (impermanent loss tracking)
  • Yield farming rewards
  • Airdrop classification
  • NFT trades

Usage

Quick Summary

Show my 2025 tax summary

Specific Jurisdiction

Calculate German taxes for 2025

Tax Loss Harvesting

Find tax loss harvesting opportunities

Generate Report

Generate Form 8949 for 2025

Compare Methods

Compare FIFO vs HIFO for my trades

Configuration

{
  "tax": {
    "jurisdiction": "US",
    "method": "fifo",
    "fiscalYear": "calendar",
    "currency": "USD",
    "includeUnrealizedGains": false,
    "autoClassify": {
      "stakingAsIncome": true,
      "airdropAsIncome": true,
      "miningAsIncome": true
    }
  }
}

Output Examples

Capital Gains Summary

📊 2025 Tax Summary (US - FIFO)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

Short-Term Gains (< 1 year)
├── Realized Gains:   $12,450.00
├── Realized Losses:  -$3,200.00
└── Net Short-Term:   $9,250.00

Long-Term Gains (≥ 1 year)
├── Realized Gains:   $45,000.00
├── Realized Losses:  -$8,500.00
└── Net Long-Term:    $36,500.00

Income (Staking/Mining/Airdrops)
└── Total Income:     $2,340.00

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Estimated Tax (24% bracket):
• Short-term: $2,220.00
• Long-term:  $5,475.00 (15%)
• Income:     $561.60
• TOTAL:      $8,256.60

Read the full file on GitHub · 169 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 8d ago First seen · 169 lines · 13 tokens per session scan A 870869f5ecbe

Subscribe to this mod's changes

tax-calculator is a skill published in the GitHub repository kayzaa/k.i.t.-bot (5 stars, last pushed 6mo ago), licensed MIT. It adds 13 tokens to every session and 1,103 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to tax-calculator, differing in 0 lines, and is treated as a copy.

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