Budget Variance Explanation Agent
Automatically compares actuals to budget by cost center and generates plain-language variance narratives for FP&A review packages.
FP&A analysts spend days each month pulling actuals from the GL, lining them up against budget and forecast, and manually writing commentary for each cost center that swings outside tolerance
The process is repetitive, prone to copy-paste errors, and analysts often chase business partners by email just to understand why a line item moved
Because the write-ups are manual, explanations are inconsistent in depth and tone across departments, which slows down the monthly business review
This agent pulls actuals and budget data automatically, flags variances beyond configurable thresholds, and drafts a first-pass narrative explanation using historical drivers, recent journal entries, and known one-time events
The agent connects to the GL and budgeting system to extract actuals, budget, and forecast figures at the account and cost-center level on a scheduled cadence. It calculates variances in dollar and percentage terms, ranks them by materiality, and cross-references recent journal entries, vendor invoices, and prior-period commentary to infer likely drivers. A language model drafts narrative explanations per cost center, which are routed to the relevant FP&A analyst or budget owner for validation before being compiled into the monthly variance report.
Extract Actuals and Budget
- Pull GL actuals by account and cost center
- Retrieve current budget and latest forecast
- Normalize chart of accounts mappings
- Validate period-end data completeness
Calculate and Rank Variances
- Compute dollar and percentage variances
- Apply materiality thresholds by account type
- Rank cost centers by variance magnitude
- Flag recurring versus one-time deviations
Draft Variance Narratives
- Cross-reference journal entries and invoices for drivers
- Pull prior-period commentary for context
- Generate plain-language explanation per line item
- Highlight items requiring business partner input
Route for Review and Compile
- Send draft narratives to budget owners for validation
- Incorporate edits and approvals
- Compile final commentary into the variance report template
- Archive the report with supporting detail