expense-categorization
Classify expenses by category, department, and tax deductibility from transaction data. Use when the user requests expense categorization or provides relevant inputs for this workflow.
git clone --depth 1 https://github.com/seb1n/awesome-ai-agent-skills /tmp/expense-categorization && cp -r /tmp/expense-categorization/finance-and-accounting/expense-categorization ~/.claude/skills/expense-categorizationSKILL.md
# Expense Categorization Automatically classify business expenses into accounting categories, assign department cost centers, and flag tax-deductible items from raw transaction data. This skill processes credit card statements, bank feeds, and expense reports to produce clean, categorized output suitable for bookkeeping, tax preparation, and spend analytics. ## Workflow 1. **Receive Expense Data** Accept transaction data as CSV, bank statement text, or structured records. Required fields: date, amount, and description or merchant name. Optional fields: card last four digits, employee name, department, receipt notes. Normalize date formats and currency to a consistent standard. 2. **Parse Description and Merchant** Extract the merchant name from the transaction descriptor, stripping out authorization codes, location suffixes, and card network prefixes. Map common merchant name variations to canonical names (e.g., "AMZN MKTP US" → "Amazon", "GOOGLE *GSUITE" → "Google Workspace"). Use the merchant category code (MCC) when available as a secondary signal. 3. **Classify Expense Category** Assign each transaction to a primary category based on merchant identity, MCC, description keywords, and amount patterns. Standard categories: Travel & Lodging, Meals & Entertainment, Software & SaaS, Office Supplies, Professional Services, Advertising, Utilities, Insurance, Shipping & Postage, Equipment, Training & Education, Miscellaneous. 4. **Assign Department and Cost Center** Route each expense to the appropriate department based on the cardholder, project codes in the description, or pre-configured rules. Apply default department assignments for known merchants (e.g., AWS charges → Engineering, HubSpot → Marketing). 5. **Flag Tax-Deductible Items** Mark expenses that qualify for tax deduction based on category and business purpose. Apply IRS rules for meals (50% deductible for business meals, 100% for company events), home office, vehicle mileage, and professional development. Flag items that need substantiation — receipts, business purpose memo, or attendee lists. 6. **Generate Categorized Summary** Output a categorized transaction list with totals by category, department, and tax status. Highlight any transactions that couldn't be confidently categorized (confidence < 80%) for manual review. ## Usage Provide transaction data in any tabular format. Specify any custom category mappings, department rules, or tax jurisdiction if not US federal. **Example prompt:** > Categorize these November credit card transactions for our 15-person startup. We have Engineering, Marketing, and Operations departments. Flag tax-deductible items. Here's the CSV: [paste transactions] ## Examples ### Example 1: Monthly Credit Card Categorization **Input (CSV):** ```csv date,amount,description,cardholder 2024-11-02,249.00,GITHUB TEAM PLAN,Sarah Chen 2024-11-03,1450.00,UNITED AIRLINES 0167823,Mike Torres 2024-11-03,189.50,MARRIOTT HOTEL CHI,Mike Torres 2024-11-05,42.67,UBER TRIP FKJE83,Mike Torres 2024-11-08,156.00,GOOGLE ADS 8834721,Lisa Park 2024-11-12,89.99,ZOOM VIDEO COMMS,Sarah Chen 2024-11-14,67.32,DOORDASH DASHER TIP,Operations 2024-11-18,4200.00,DELL TECHNOLOGIES,Sarah Chen 2024-11-22,350.00,COURSERA BUSINESS,Mike Torres 2024-11-25,23.45,STAPLES #1284,Operations ``` **Output:** | Date | Amount | Merchant | Category | Department | Tax Deductible | Notes | |------------|-----------|------------------|-----------------------|-------------|----------------|-------------------------------| | 2024-11-02 | $249.00 | GitHub | Software & SaaS | Engineering | Yes (100%) | | | 2024-11-03 | $1,450.00 | United Airlines | Travel & Lodging | Engineering | Yes (100%) | Business travel | | 2024-11-03 | $189.50 | Marriott | Travel & Lodging | Engineering | Yes (100%) | Business travel | | 2024-11-05 | $42.67 | Uber | Travel & Lodging | Engineering | Yes (100%) | Ground transport | | 2024-11-08 | $156.00 | Google Ads | Advertising | Marketing | Yes (100%) | | | 2024-11-12 | $89.99 | Zoom | Software & SaaS | Engineering | Yes (100%) | | | 2024-11-14 | $67.32 | DoorDash | Meals & Entertainment | Operations | Yes (50%) | Needs business purpose memo | | 2024-11-18 | $4,200.00 | Dell | Equipment | Engineering | Depreciation | Section 179 eligible | | 2024-11-22 | $350.00 | Coursera | Training & Education | Engineering | Yes (100%) | | | 2024-11-25 | $23.45 | Staples | Office Supplies | Operations | Yes (100%) | | **Summary:** | Category | Total | % of Spend | |-----------------------|-----------|------------| | Equipment | $4,200.00 | 61.5% | | Travel & Lodging | $1,682.17 | 24.6% | | Training & Education | $350.00 | 5.1% | | Software & SaaS | $338.99 | 5.0% | | Advertising | $156.00 | 2.3% | | Meals & Entertainment | $67.32 | 1.0% | | Office Supplies | $23.45 | 0.3% | | **Total** | **$6,817.93** | **100%** | ### Example 2: Flagging Misclassified Expenses **Input:** Review existing categorizations for accuracy. **Output — Correction Report:** | Date | Amount | Merchant | Current Category | Corrected Category | Reason | |------------|---------|----------------|------------------|------------------------|---------------------------------------------------------| | 2024-11-07 | $320.00 | WeWork | Office Supplies | Rent & Facilities | Co-working space is r
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