Financial LLM

How to Forecast a Budget in 12 Simple Steps

Learn how to forecast budget with ease using these 12 simple steps. A practical guide to help you plan smarter and stay financially on track.

Jun 30, 2025

Forecasting a budget accurately is an essential skill in financial management. Consider being able to accurately predict your organization's financial needs and constraints. This would enable you to make informed decisions and allocate resources efficiently. In the context of a Financial LLM, mastering the art of budget forecasting is crucial. This guide offers valuable insights into how you can learn to forecast budgets effectively, enabling you to write and research more efficiently with the aid of AI.

Furthermore, it will introduce you to Otio's AI research and writing partner, a tool designed to help you achieve your goals. Whether you want to speed up your writing process or improve the quality of your research, this AI partner can help. 

Table Of Contents

Importance of Budget Forecasting

dollar bills - How to Forecast Budget

Budgeting Helps Companies Plan for Financial Stability 

One of the key benefits of budgeting is that it helps companies plan for financial stability by setting achievable targets and monitoring progress toward those goals. A well-designed budget can provide valuable insights into how the company is performing, where it is spending money, and where it can make adjustments to improve its financial performance. Budgeting can also help companies identify potential cash flow problems and take steps to avoid them, such as reducing expenses or increasing revenue. Additionally, a budget can help companies prioritize spending and allocate resources to the areas that will generate the highest return on investment. 

Forecasting Plays a Critical Role in Identifying Opportunities and Risks 

Forecasting plays a critical role in identifying opportunities and risks that may impact the company’s financial performance. By analyzing trends and market conditions, companies can make informed decisions about where to allocate resources and how to adapt to changing circumstances. Forecasting can also help companies anticipate potential risks, such as changes in consumer behavior, shifts in the competitive landscape, or disruptions in the supply chain. By identifying these risks early on, companies can take proactive steps to mitigate them and reduce their impact on financial performance. Ultimately, forecasting enables companies to identify new market opportunities and potential revenue streams, thereby capitalizing on emerging trends and staying ahead of the competition.

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How to Forecast a Budget in 12 Simple Steps

instructor making notes - How to Forecast Budget

1. Use AI Tools like Otio

Before you begin, consider utilizing AI tools like Otio to assist with your research and data collection. Otio is designed to help researchers, knowledge workers, and students cope with content overload by providing a single, AI-native workspace. With Otio, you can collect information from various sources, including bookmarks, tweets, books, and YouTube videos. The tool can then extract key takeaways from these sources, generate detailed notes, and even assist you in drafting reports or papers. Using Otio or similar tools can streamline the research phase of budget forecasting, ensuring you have all the relevant information readily available.

2. Gather Data

Budget forecasting begins with gathering accurate data. Start with your annual budget as it establishes the financial benchmarks for the year. Keep in mind that most budgets are set on a fiscal year basis and might not account for seasonal variations in revenue and expenses. To create a more precise forecast, break down the annual budget into monthly segments using methods like the straight-line approach or scenario analysis.

3. Analyze Historical Data

Take a look at past budgets and financial records to identify trends that could influence your forecast. Historical data can reveal patterns in spending, seasonal fluctuations in sales, and other factors that will help you set realistic financial goals.

4. Review KPIs

Identify the key performance indicators (KPIs) that matter most to your business. These could include customer acquisition cost, monthly recurring revenue, gross profit margin, and other relevant metrics. Understanding these metrics will guide your operational decisions and help you stay aligned with your budget forecast.

5. Engage Cross-Functional Stakeholders

Collaborate with leaders from various departments, including sales, finance, and marketing. Their insights will help you create a budget that aligns with the organization's overall priorities. Additionally, involving stakeholders in the process fosters buy-in and support for the final budget.

6. Understand Company Revenue

Examine your revenue streams to determine where most of your income comes from and whether there are any seasonal trends. This analysis will inform your revenue projections in the budget forecast.

7. Understand Company Expenses

List all fixed and variable expenses, including rent, salaries, and marketing costs. Look for any seasonal variations or other factors that could impact your spending projections.

8. Analyze Cash Flow

Review the movement of money into and out of your business. Positive cash flow indicates more money coming in than going out, while negative cash flow is the opposite. Understanding your cash flow situation is essential for accurate budget forecasting.

9. Forecast Changes

Adjust your current budget to account for anticipated changes in the forecast period. This could include expected increases in manufacturing costs, growth in specific markets, or other factors that will impact your financial position.

10. Update with the Latest Financial Data

Use real-time business data as the starting point for your forecast. Incorporating up-to-date information ensures that your predictions accurately reflect the current state of your business.

11. Establish a Forecasting Period

Choose the timeframe for your forecast, whether it be monthly, quarterly, or annual. Consistency in tracking and comparing performance over time is crucial. For businesses operating in dynamic environments, consider rolling forecasts that extend beyond one fiscal year.

12. Adjust for Influencing Factors

Account for any known or potential changes that could affect your forecast. This may include product launches, economic shifts, and regulatory changes. The more factors you can anticipate, the more accurate your budget forecast will be.

Methods of Budget Forecasting

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Budget forecasting is a critical component of financial planning and analysis. There are various methods available to help predict financial outcomes, each with its own strengths and ideal use cases. Understanding these methods can enhance the accuracy of your budget forecasts and improve decision-making for your organization. Quantitative Methods When producing accurate forecasts, business leaders typically turn to quantitative forecasts, or assumptions about the future based on historical data. 

1. Percent of Sales

Internal pro forma statements are often created using a percentage of sales forecasting. This method calculates future metrics of financial line items as a percentage of sales. For example, the cost of goods sold is likely to increase proportionally with sales; therefore, it’s logical to apply the exact growth rate estimate to each. To forecast the percentage of sales, examine the percentage of each account’s historical profits related to sales. To calculate this, divide each account by its sales, assuming the numbers will remain steady. For example, if the cost of goods sold has historically been 30% of sales, this trend is likely to continue. 

2. Straight Line 

The straight-line method assumes a company's historical growth rate will remain constant. Forecasting future revenue involves multiplying a company’s previous year's revenue by its growth rate. For example, if the prior year's growth rate was 12 percent, straight-line forecasting assumes it'll continue to grow by 12 percent next year. Although straight-line forecasting is an excellent starting point, it doesn't account for market fluctuations or supply chain issues. 

3. Moving Average 

A moving average involves calculating the average—or weighted average—of previous periods to forecast future values. This method involves a closer examination of a business’s high or low demands, making it often beneficial for short-term forecasting. For example, you can use it to forecast next month’s sales by averaging the previous quarter. Moving average forecasting can help estimate several metrics. While it’s most commonly applied to future stock prices, it’s also used to estimate future revenue. To calculate a moving average, use the following formula: 

  • A1 + A2 + A3 … / N 

Formula breakdown: 

  • A = Average for a period 

  • N = Total number of periods 

Using weighted averages to emphasize recent periods can increase the accuracy of moving average forecasts. 

4. Simple Linear Regression 

Simple linear regression forecasts metrics based on a relationship between two variables⁠: dependent and independent. The dependent variable represents the forecasted amount, while the independent variable is the factor that influences this amount. The equation for simple linear regression is: 

  • Y = BX + A 

Formula breakdown:

  • Y⁠ = Dependent variable⁠ (the forecasted number) 

  • B = Regression line's slope 

  • X = Independent variable 

  • A = Y-intercept 

5. Multiple Linear Regression 

If two or more variables directly impact a company's performance, business leaders might turn to multiple linear regression. This enables a more accurate forecast, as it takes into account several variables that ultimately impact performance. To forecast using multiple linear regression, a linear relationship must exist between the dependent and independent variables. Additionally, the independent variables can’t be so closely correlated that it’s impossible to tell which impacts the dependent variable. Qualitative Methods When it comes to forecasting, numbers don't always tell the whole story. There are additional factors that influence performance and can't be quantified.

Qualitative forecasting relies on experts’ knowledge and experience to predict performance, rather than relying on historical numerical data. These forecasting methods are often called into question, as they're more subjective than quantitative methods. Yet, they can provide valuable insight into forecasts and account for factors that can’t be predicted using historical data. 

6. Delphi Method 

The Delphi method of forecasting involves consulting experts who analyze market conditions to predict a company's performance. A facilitator reaches out to those experts with questionnaires, requesting forecasts of business performance based on their experience and knowledge. The facilitator then compiles their analyses and sends them to other experts for comments. The goal is to continue circulating them until a consensus is reached. 

7. Market Research 

Market research is essential for organizational planning. It helps business leaders gain a holistic view of the market, encompassing competition, fluctuating conditions, and consumer patterns. It’s also critical for startups when historical data isn’t available. New businesses can benefit from financial forecasting because it’s essential for recruiting investors and budgeting during the first few months of operation. When conducting market research, start by formulating a hypothesis and then determining the necessary methods. Sending out consumer surveys is an excellent way to gain a deeper understanding of consumer behavior when you don’t have numerical data to inform decisions.

10 Best AI Tools for Budget Forecasting

1. Otio: Your AI Research and Writing Partner 

Otio - How to Forecast Budget

Knowledge workers, researchers, and students today suffer from content overload. They resort to using fragmented, complex, and manual tools to manage their workflows. Otio solves this problem by providing one AI-native workspace for researchers. It helps them collect information from a wide range of data sources, extract key takeaways, and create draft outputs using the sources they have collected. 

Key features 

2. Anaplan: Enterprise-Level Financial Planning 

Anaplan is an enterprise-level financial planning platform built for big businesses with complex financial structures. It helps large teams collaborate on budgeting, forecasting, and scenario modeling across various departments, including finance, HR, sales, and supply chain. 

Key features 

  • PlanIQ uses machine learning and predictive analytics to predict demand, revenue, and expenses. 

  • Connected planning: ensures consistent data and alignment across departments 

  • Multi-dimensional modeling: supports scenario modeling across different business variables

  • Predictive insights and Optimizer: refines sales forecasting and demand planning 

3. Workday Adaptive Planning: Organization-Wide Financial Planning 

Workday Adaptive Planning is an enterprise-level budgeting and financial planning software that aids organization-wide financial planning without the need for spreadsheets. 

Key Features 

  • Budget and forecast management tools, 

  • Workforce planning, 

  • Sales goal planning, 

  • Capital and scenario planning 

4. Planful: Financial Performance Management 

Planful is a financial performance management platform for budgeting, forecasting, and reporting. It follows a structured, process-driven approach to financial planning, often relying on pre-built templates and standardized workflows. 

Key features 

  • Planful predict: uses machine learning models to improve forecast accuracy 

  • Rolling forecasts: continuously update financial projections 

  • Accounting and financial close automation 

5. Self-Service Reporting Vena: Cloud-Based Financial Planning 

Vena Solutions is a cloud-based financial planning and cash management system that helps financial teams manage their data more effectively.

Key Features 

  • Driver-based modeling, 

  • AI-enhanced forecasting, 

  • Step-by-step workflow modeling, 

  • Central security database with encryption 

6. Pigment: Business Budgeting Platform 

Pigment is a business budgeting platform that integrates finance, HR, sales, and operations into a single system for budgeting, forecasting, and scenario modeling. 

Key features 

  • Budgeting and forecasting 

  • AI planning assistant, 

  • Scenario planning, 

  • Headcount planning 

7. Mosaic: Strategic Finance Platform. 

Mosaic is a strategic finance platform designed to help businesses with real-time financial planning, forecasting, and scenario modeling. 

Key Features 

  • Dynamic financial models 

  • Scenario creation and comparison 

  • Intuitive dashboards 

  • Automated reporting 

8. Datarails: FP&A Platform for Excel Users 

Datarails is a financial planning and analysis (FP&A) platform built for businesses that want to automate budgeting, forecasting, and reporting while continuing to work in Excel. 

Key features

  • Scenario modeling, 

  • FP&A genius, 

  • Team collaboration and version control, 

  • Storyboards and data visualization 

9. Drivetrain: AI-Powered Financial Modeling 

Drivetrain is an AI-powered financial modeling and planning tool that helps businesses optimize their financial operations. 

Key Features

  • Real-time financial forecasts 

  • Scenario simulation 

  • Financial model building 

10. Visualization tools SAP: Comprehensive Financial Management 

SAP provides a comprehensive suite of financial management tools. 

Key Features

  • Cash flow management, 

  • Cloud-based platform, 

  • Combined financial and operational planning.

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Supercharge Your Researching Ability With Otio — Try Otio for Free Today

Budget forecasting is a crucial skill for any business or individual seeking to manage their finances effectively. By understanding how to forecast a budget, you can plan for the future, avoid financial pitfalls, and make informed decisions about spending and saving. There are several key components to budget forecasting, including identifying income sources, estimating expenses, and accounting for variables and uncertainties. In this section, we'll walk through the steps of forecasting a budget, using a practical example to illustrate each point.  

Try Otio for Free Today. 

If you're tired of dealing with content overload and want a better way to manage your research, give Otio a try. This AI-native workspace is designed to help you collect, extract, and create information more quickly and efficiently. Best of all, you can try Otio for free today!

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