Personal Budget Controller

The Problem

Monthly budgeting usually breaks down after the first calculation. A user may know income - fixed costs - savings goal, but still lacks feedback while spending happens. Categories such as dining, transport, and shopping can quietly compete with each other, and the month ends with overspending or a missed savings target. Budget Controller addresses this day-to-day cash-flow problem by turning a budget into category limits and a review loop.

How It Works

The skill is less about financial analysis and more about making budgeting a queryable workflow:
- Budget setup: calculate the spendable budget from monthly income, fixed expenses, and savings goal.
- Category allocation: split limits across dining, transport, shopping, and other categories, optionally referencing the 50-30-20 rule while allowing personal adjustments.
- Progress tracking: update category balances, usage rates, and remaining days as the user reports expenses.
- Overspending response: diagnose why a category is over budget and suggest concrete actions, such as reducing one category, borrowing from another, or revising the month's plan.
- Budget vs actual review: compare planned and actual spending while separating fixed costs from flexible spending, so rent and utilities are not treated as controllable line items.

Boundaries

It is suitable for personal monthly budget control and spending tracking, not enterprise budgeting, financial statement analysis, loan assessment, or investment planning. The skill relies on user-reported expenses, cannot sync bank transactions, and does not enforce spending limits. For variable income, it suggests basing the budget on the lowest expected monthly income; if the budget repeatedly feels too tight, it recommends one or two months of expense tracking before recalibrating.