Budget Analyzer
Comprehensive expense analysis tool for personal finance and business budgeting.
Features Auto-Categorization: Classify expenses by merchant/description Trend Analysis: Month-over-month spending patterns Period Comparison: Compare spending across time periods Category Breakdown: Pie charts and bar graphs by category Savings Recommendations: Identify areas to reduce spending Budget vs Actual: Track against budget targets Export Reports: PDF and HTML summaries Quick Start from budget_analyzer import BudgetAnalyzer
analyzer = BudgetAnalyzer()
Load transaction data
analyzer.load_csv("transactions.csv", date_col="date", amount_col="amount", description_col="description")
Analyze spending
summary = analyzer.analyze() print(summary)
Get category breakdown
categories = analyzer.by_category() print(categories)
Generate report
analyzer.generate_report("budget_report.pdf")
CLI Usage
Basic analysis
python budget_analyzer.py --input transactions.csv --date date --amount amount
With custom categories
python budget_analyzer.py --input data.csv --categories custom_categories.json
Compare two periods
python budget_analyzer.py --input data.csv --compare "2024-01" "2024-02"
Generate PDF report
python budget_analyzer.py --input data.csv --report report.pdf
Set budget targets
python budget_analyzer.py --input data.csv --budget budget.json --report report.pdf
Input Format Transaction CSV date,amount,description,category 2024-01-15,45.99,Amazon Purchase,Shopping 2024-01-16,12.50,Starbucks,Food & Dining 2024-01-17,150.00,Electric Company,Utilities
Custom Categories (JSON) { "Food & Dining": ["starbucks", "mcdonalds", "restaurant", "uber eats"], "Transportation": ["uber", "lyft", "gas station", "shell"], "Shopping": ["amazon", "walmart", "target"], "Utilities": ["electric", "water", "gas", "internet"] }
Budget Targets (JSON) { "Food & Dining": 500, "Transportation": 200, "Shopping": 300, "Utilities": 250, "Entertainment": 150 }
API Reference BudgetAnalyzer Class class BudgetAnalyzer: def init(self)
# Data Loading
def load_csv(self, filepath: str, date_col: str, amount_col: str,
description_col: str = None, category_col: str = None) -> 'BudgetAnalyzer'
def load_dataframe(self, df: pd.DataFrame) -> 'BudgetAnalyzer'
# Categorization
def set_categories(self, categories: Dict[str, List[str]]) -> 'BudgetAnalyzer'
def auto_categorize(self) -> 'BudgetAnalyzer'
# Analysis
def analyze(self) -> Dict # Full summary
def by_category(self) -> pd.DataFrame
def by_month(self) -> pd.DataFrame
def by_day_of_week(self) -> pd.DataFrame
def top_expenses(self, n: int = 10) -> pd.DataFrame
def recurring_expenses(self) -> pd.DataFrame
# Comparison
def compare_periods(self, period1: str, period2: str) -> Dict
def year_over_year(self) -> pd.DataFrame
# Budgeting
def set_budget(self, budget: Dict[str, float]) -> 'BudgetAnalyzer'
def budget_vs_actual(self) -> pd.DataFrame
def budget_alerts(self) -> List[Dict]
# Insights
def get_recommendations(self) -> List[str]
def spending_score(self) -> Dict
# Visualization
def plot_categories(self, output: str) -> str
def plot_trends(self, output: str) -> str
def plot_budget_comparison(self, output: str) -> str
# Export
def generate_report(self, output: str, format: str = "pdf") -> str
def to_csv(self, output: str) -> str
Analysis Features Summary Statistics summary = analyzer.analyze()
Returns:
{
"total_spent": 2500.00,
"transaction_count": 45,
"date_range": {"start": "2024-01-01", "end": "2024-01-31"},
"average_transaction": 55.56,
"largest_expense": {"amount": 500, "description": "Rent"},
"categories":
}
Category Breakdown categories = analyzer.by_category()
Returns DataFrame:
category | amount | percentage | count
Food & Dining | 450.00 | 18.0% | 15
Transportation | 200.00 | 8.0% | 8
...
Monthly Trends monthly = analyzer.by_month()
Returns DataFrame:
month | total | avg_transaction | count
2024-01 | 2500.00 | 55.56 | 45
2024-02 | 2800.00 | 60.87 | 46
Period Comparison comparison = analyzer.compare_periods("2024-01", "2024-02")
Returns:
{
"period1_total": 2500.00,
"period2_total": 2800.00,
"difference": 300.00,
"percent_change": 12.0,
"category_changes": {
"Food": {"change": 50, "percent": 11.1},
...
}
}
Budget Tracking Set Budget Targets analyzer.set_budget({ "Food & Dining": 500, "Transportation": 200, "Shopping": 300 })
Budget vs Actual comparison = analyzer.budget_vs_actual()
Returns DataFrame:
category | budget | actual | difference | status
Food & Dining | 500 | 450 | 50 | under
Transportation | 200 | 250 | -50 | over
Budget Alerts alerts = analyzer.budget_alerts()
Returns:
[
{"category": "Transportation", "status": "over", "amount": 250, "budget": 200, "percent_over": 25},
{"category": "Shopping", "status": "warning", "amount": 280, "budget": 300, "percent_used": 93}
]
Recommendations Engine recommendations = analyzer.get_recommendations()
Returns:
[
"Food & Dining spending increased 15% from last month. Consider meal prepping.",
"You have 3 subscription services totaling $45/month. Review for unused subscriptions.",
"Transportation costs are 25% over budget. Consider carpooling or public transit.",
"Top merchant: Amazon ($350). Set spending limits for online shopping."
]
Spending Score score = analyzer.spending_score()
Returns:
{
"overall_score": 72, # 0-100
"factors": {
"budget_adherence": 65,
"spending_consistency": 80,
"savings_rate": 70
},
"grade": "B",
"summary": "Good spending habits with room for improvement in budget adherence."
}
Auto-Categorization
Built-in category patterns:
DEFAULT_CATEGORIES = { "Food & Dining": ["restaurant", "cafe", "starbucks", "mcdonald", "uber eats", "doordash"], "Transportation": ["uber", "lyft", "gas", "shell", "chevron", "parking"], "Shopping": ["amazon", "walmart", "target", "costco", "best buy"], "Utilities": ["electric", "water", "gas", "internet", "phone", "verizon"], "Entertainment": ["netflix", "spotify", "hulu", "movie", "theater"], "Healthcare": ["pharmacy", "cvs", "walgreens", "doctor", "hospital"], "Travel": ["airline", "hotel", "airbnb", "booking"], "Subscriptions": ["subscription", "membership", "monthly"] }
Visualizations Category Pie Chart analyzer.plot_categories("categories.png")
Creates pie chart of spending by category
Spending Trends analyzer.plot_trends("trends.png")
Creates line chart of monthly spending over time
Budget Comparison analyzer.plot_budget_comparison("budget.png")
Creates bar chart comparing budget vs actual by category
Report Generation PDF Report analyzer.generate_report("report.pdf")
Includes:
- Executive summary
- Category breakdown with charts
- Monthly trends
- Top expenses
- Budget vs actual (if set)
- Recommendations
HTML Report analyzer.generate_report("report.html", format="html")
Interactive HTML report with charts
Example Workflows Personal Finance Review analyzer = BudgetAnalyzer() analyzer.load_csv("bank_transactions.csv", date_col="Date", amount_col="Amount", description_col="Description")
Auto-categorize transactions
analyzer.auto_categorize()
Set monthly budget
analyzer.set_budget({ "Food & Dining": 600, "Transportation": 250, "Entertainment": 200 })
Get full analysis
print(analyzer.analyze()) print(analyzer.budget_vs_actual()) print(analyzer.get_recommendations())
Generate report
analyzer.generate_report("monthly_review.pdf")
Business Expense Tracking analyzer = BudgetAnalyzer() analyzer.load_csv("business_expenses.csv", date_col="date", amount_col="amount", category_col="expense_type")
Compare quarters
q1_vs_q2 = analyzer.compare_periods("2024-Q1", "2024-Q2")
Top expense categories
top = analyzer.by_category().head(5)
Generate report for accounting
analyzer.generate_report("quarterly_expenses.pdf")
Dependencies pandas>=2.0.0 numpy>=1.24.0 matplotlib>=3.7.0 reportlab>=4.0.0