How to Build Budgets and Forecast Runway

In the guide "How to Build Budgets and Forecast Runway," the author emphasizes the limitations of relying on traditional accounting reports, such as Profit & Loss, Cashflow, and Balance Sheet, due to their reconstructed nature and potential for outdated or deprecated fields. Instead, the guide advocates for using transaction-level data as the fundamental input for financial analysis, ensuring consistency across various accounting systems and making forecasts more reliable. The Unified Accounting API is presented as a solution, offering access to detailed transaction data, which allows teams to build operating budgets and forecast cash runway accurately. The guide details steps for fetching and syncing transactions, classifying them, building monthly budgets, calculating burn rates, and forecasting runway, all while using reports only as validation tools rather than primary sources. This approach helps teams avoid the pitfalls of report-driven logic, ensuring that financial calculations remain defensible and scalable as products grow.