What is a Financial Model and What are The Common Mistakes That Founders Make While Doing Financial Modeling

Iqra Anwar
6 min readJul 5, 2022

Founders, avoid these common Financial Modeling Mistakes and learn how to build a financial model that will impress your investors…

Financial modeling is not an easygoing procedure and it is difficult to get it right. There are various financial modeling mistakes that founders make while doing financial modeling.

Before we go into the common financial errors, let’s mark off the financial model. In its simplest form, a financial model is a sort of record or a program that enables you to check your finances. You can think of it as a simulation.

What Exactly Is a Financial Model?

A financial model is the name of the approach to estimating the financial performance of your business in the future. It is done by projecting revenues, expenses, cash flow, and other financial metrics over a set period of time.

It is a technique for creating a detailed financial forecast. For organizations, financial modeling typically is part of the start-ups’ planning process. If you enter your assumptions, it outputs the implications of those stereotypes. You will notice how modifications to your speculations affect your business’s future.

The most common financial model type in the startup world is an income statement for each year for three to five years. Financial model has proven to be an invaluable tool for companies and entrepreneurs. As a startup founder, you’ll need to create a financial model to engage and convince investors. An accurate visualization without financial modeling mistakes is prominent for planning goals, estimating and budgeting.

For the most part of financial modeling, entrepreneurs use an Excel spreadsheet. If not managed properly, this can add to the complexity and confusion. Avoid plunging into spreadsheets without a strategy. It can tip off you to financial modeling mistakes.

Where Do Financial Models Fail?

Financial modeling is a complex process. It requires diving into the details of a company’s financial statements and projecting how different variables will affect its future performance. Even an experienced financial analyst can make mistakes when creating models.

However, a financial model is only as good as the data that goes into it. “Trash in, trash out”. The consequent company’s financial picture will be erroneous. If the numbers, formulae, and assumptions used in the spreadsheets are incomplete. This can result in poor or even disastrous business decisions.

There are a few common blunders that lead to bad financial models. Even trained financial advisors make these financial moeling mistakes from time to time. Common errors include forgetting to update variables and assigning incorrect values to inputs. Or even misinterpreting what a variable represents in the first place.

Here are some false moves to avoid while preparing your financial modeling:

  • Using the wrong data
  • Incorrect formatting
  • Incorrect calculation order
  • Incorrect variable tracking
  • Careless typing errors
  • Wrong analysis and conclusion
  • Lack of continuity in variables

Common Financial modeling mistakes to Avoid

For your organization, financial modeling is a major part of the start-up’s planning process. It is the process of developing a precise financial projection for your company. It is critical to establish authentic assumptions while developing a financial model. But your rough calculations must be realistic and achievable.

Many founders make the mistake of over-optimizing their assumptions to make their project look more attractive to investors. This can lead to unrealistic projections and ultimately, failure.

Here are the most common financial modeling mistakes made by founders are:

Mistake #1 — Not Understanding the Basics of Financial Modeling

Get the picture that financial modeling is a numerical depiction of a business’s activities. It concentrates on the past, present, and predicted future but first of all it is important to understand that financial models don’t predict the exact futures.

Financial models are meant to be used as adoption of decision mediums. You can use financial models to estimate the expenses along with the profitability of a proposed project from the beginning.

Financial analysts use financial models to explain or predict the influence of occurrences, on a company’s stock, ranging from internal elements. Such as changes in strategy or pricing structure to external factors. Including changes in economic policy or legislation.

Mistake #2 — A Missing or out-of-date external spreadsheet

Spreadsheets extract data from each other in the financial model. This only works if all the spreadsheets are accessible. And all the spreadsheets are on the same system. Stored as the financial modeling spreadsheet. If this isn’t the case, you will get an error, a broken formula, or an invalid function.

It’s all too simple to make a mess by connecting to a file in a separate folder. Moving or removing data in a document that you have linked from another spreadsheet is another prevalent issue. When one spreadsheet is updated but the other isn’t, it’s a significant problem.

It’s recommended to keep the number of spreadsheet linkages to the smallest. And double-check for accuracy anytime. Confirm if the files, links, or connected data are active and working in good order.

Mistake #3 — Only One Scenario Being Considered

Although you would not want to sugarcoat your funding plan. But you do have to consider many situations. A single-lane view taken into consideration can cost you in the long run.

Try to include diverse possibilities in your financial model. This can ensure you’re prepared for anything the startup industry throws at you. So, consider more scenarios rather than relying on one.

Mistake #4 — Failure to provide a financial overview

A financial summary is a visual representation of your financial model. It emphasizes all major assumptions and findings. A financial model often contains many pieces. It might take a long time for an investor to grasp the important results. Your business idea can be delayed if underlying rationales take more time.

A good financial overview saves investors time by making their due diligence process easier. Furthermore, it will assist you in determining what to point up. Because, it matters what you highlight when you are presenting your financials.

Mistake #5 — Producing Intensely Complex Models

A smart model is beneficial to your organization because it delivers extra knowledge. The more conclusions you make, the less feasible your options become. It’s difficult to forecast what will occur in the future.

It takes longer to make precise estimates about hundreds of various aspects. And the results might not be what you expect. Using 10 to 15 essential assumptions yields more accurate findings in many circumstances.

Finding a balance between the model’s flexibility and complexity should be your aim. If you’re an entrepreneur, you should take the time to examine the amount of complexity that your financial model may entail.

Mistake #6 — Errors in calculations

This blunder is self-evident. To build an excellent financial prediction for your company plan. You don’t have to be an expert in financial modeling services. Even so, you’ll need to know the fundamentals only. Financial modeling, corporate finance, and accounting are all included.

If you’re not sure how to make forecasts with financial modeling without errors that will impress your investors. You have two choices:

1. Find a professional who can assist you or construct it for you.

2. Get a template. All the necessary calculations are already done for you, so all you have to do now is put in your assumptions.

Some key elements to remember in order to prevent Common Mistakes in Financial Modeling

  • Stay organized
  • Check your assumptions twice
  • Use the most up-to-date information available
  • Do not rely on Excel to detect errors
  • Be mindful of excessive adaptability
  • When it comes to real-world dates, be wary
  • Don’t forget to account for incidental expenses

The best practices to focus on in Financial Modeling

1. Include a variety of situations dependent on external circumstances.

2. Ensure that your primary drivers are clear

3. Maintain consistency with unit economics

4. Note down every detail and Include comments to make the text simpler to understand

The Best Way to Avoid Financial Modeling Mistakes

Founders don’t make these common financial modeling mistakes. A well-executed financial model is an essential tool for your business. It can assist you in making well-informed business decisions. Assess your fundraising prospects, and track your progress over time.

If you intend to pursue your entrepreneurial concept further. When building your own financial model, it’s imperative to be assured that you don’t make any costly mistakes.

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Iqra Anwar

Data Engineer @ RC! BSCS graduate from BBSUL Karachi, Pakistan. Ex Technical writer at Omdena Pakistan Chapter | I write articles related to Computer Science