This document provides guidance on preparing financial projections for a startup business. It outlines four main rules: 1) financial projections are needed, 2) it is a business rather than accounting exercise, 3) projections will never be perfect but need to make sense, and 4) the goal is to discuss assumptions rather than numbers. It then walks through an example for an education technology startup, demonstrating how to develop a bottom-up market strategy and link it to revenue and cost projections over five years. Key steps include segmenting the market, creating strategies for each segment, and using research and assumptions to build financials and calculate funding needs.