A financial model is a spreadsheet or planning system that projects a company's revenue, expenses, cash flow, headcount, and key metrics into the future. The model serves as the operating planning document (drives hiring decisions, budget allocation, runway analysis), the capital-raising document (investors review it in diligence), and the board reporting document (actuals are compared against it each month). Model quality is a meaningful signal about how rigorously the company runs its operations. It is the document where many decisions ultimately get tested before they're made.
The core components of a financial model:
Revenue model: