At Snowball we produce a lot of complex financial models, whether they be for management accounts, projections, cashflows or for corporate finance transactions such as acquisitions, sales or management buy outs. This will often include modelling to incorporate different scenarios and sensitivities.
A well-constructed financial model allows you to forecast future financial performance, make informed business decisions, and assess potential investment opportunities.
Whilst we often produce these for clients, I thought it would be worth setting out some principles that we use that others may find useful whether you are building simple or complex financial models:
Understand the Purpose of Your Model
Before you start building a financial model, it’s essential to clearly define its purpose. Are you creating a model to evaluate a new investment, forecast a company’s financial performance, or assess a potential merger or acquisition? Understanding the model’s goal will guide its structure, complexity, and the assumptions you need to include.
Gather and Organise Your Data
Accurate and comprehensive data is the backbone of any financial model. Start by collecting historical financial statements, such as income statements, balance sheets, and cash flow statements. You should also gather relevant industry data, economic indicators, and any internal company data that will affect your forecasts. Organise this data in a logical, easy-to-access manner to streamline the modelling process.
Choose the Right Model Structure
The structure of your financial model should align with its purpose and the nature of your business. Common financial model structures include:
1 – Three-Statement Model: Integrates the income statement, balance sheet, and cash flow statement.
2 – Discounted Cash Flow (DCF) Model: Projects future cash flows and discounts them back to present value.
3 – Budget Model: Helps plan and track expenses and revenues over a specific period.
4 – M&A Model: Used to evaluate the financial implications of a merger or acquisition.
Build a Flexible and Transparent Model
Flexibility and transparency are key to a robust financial model. Break the model into distinct sections, such as assumptions, calculations, and outputs. This makes it easier to update and audit. Use consistent formatting, clear labels, and color-coding conventions to differentiate between inputs, calculations, and outputs. Include comments and notes to explain assumptions, especially for complex calculations.
Make Realistic Assumptions
The accuracy of a financial model depends heavily on the assumptions you make. Use historical data to inform your assumptions about growth rates, cost structures, and other key drivers. It’s essential to remain conservative and realistic, avoiding overly optimistic projections. Incorporate different scenarios to account for variability and uncertainty, including base, best, and worst-case scenarios.
Integrate Key Financial Statements
A comprehensive financial model should seamlessly integrate the income statement, balance sheet, and cash flow statement. Ensure that changes in one statement flow correctly to the others. For example, net income from the income statement should link to retained earnings on the balance sheet, and changes in working capital should flow through the cash flow statement.
Perform Sensitivity and Scenario Analysis
Incorporate sensitivity and scenario analysis to understand how changes in key assumptions impact your model’s outcomes. Sensitivity analysis examines the effect of varying one or two inputs, while scenario analysis evaluates the outcomes under different sets of assumptions. These analyses help identify the most significant drivers of financial performance and provide insights into potential risks and opportunities.
Review and Validate Your Model
Thoroughly review and validate your model to ensure accuracy and reliability. Cross-check calculations, validate assumptions against historical data, and test the model’s functionality.
Keep it Simple and User-Friendly
While it’s important to include all necessary details in your financial model, avoid overcomplicating it. A complex model with too many variables can be difficult to manage and prone to errors. Aim for a balance between detail and simplicity, ensuring the model is easy to understand and use by others who may not have been involved in its creation.
Document Your Model Thoroughly
Documentation is critical for effective communication and future use. Include a summary page outlining the model’s purpose, key assumptions, and findings. Provide clear instructions on how to use and update the model. Proper documentation ensures that others can easily understand, use, and modify the model as needed.
Building a financial model requires careful planning, attention to detail, and a solid understanding of financial principles. By following these best practices, you can create a robust, flexible, and reliable financial model that serves your strategic needs and supports sound decision-making. It is worth saying many of these principles have been learnt the hard way over the many years we have been producing financial models!!!
