How to Create an Effective Waterfall Chart in Excel: A Comprehensive Guide

Excel is a powerful tool for visualizing and analyzing data, with a wide variety of chart types to choose from. One of the most useful charts for illustrating financial performance and changes over time is the waterfall chart. Also known as a bridge chart or cascade chart, a waterfall chart allows you to clearly see the positive and negative changes that lead from a starting value to an ending value.

In this guide, we‘ll take an in-depth look at what waterfall charts are, why they‘re useful, and provide step-by-step instructions on how to create a compelling and insightful waterfall chart in Excel. Whether you‘re an accountant looking to visualize budget variances, a project manager tracking cost fluctuations, or an executive presenting profit and loss data, mastering the waterfall chart will allow you to tell a clear and impactful story with your numbers. Let‘s dive in!

What is a Waterfall Chart?

A waterfall chart is a special type of column chart that illustrates how positive and negative values contribute to a total cumulative effect between a starting and ending value. The columns appear to be floating or suspended in the air, connected by lines, giving the appearance of a waterfall or cascade – hence the name.

The defining characteristic of waterfall charts are the floating columns in the middle of the chart. These represent intermediate values, color coded as green for positive values that increase the total, and red for negative values that decrease the total. The starting and ending values appear as whole columns, with lines connecting to the floating segments in between.

Waterfall charts are an excellent choice anytime you need to show an audience how various increases and decreases lead from point A to point B over time. Some common use cases include:

• Visualizing financial performance and changes in revenue, profit, expenses, etc. from one period to the next
• Analyzing budget vs actual variances and the factors that contribute to them
• Presenting a buildup of costs or value-add components that sum to a final price
• Demonstrating the impact of different initiatives or decisions on KPIs or metrics
• Showing a reconciliation of account balances or transactions

The visual nature of waterfall charts makes it easy to quickly grasp the big picture of what led from the starting point to the end result, and to hone in on the most significant positive and negative factors. Well-designed waterfall charts are an invaluable aid for data storytelling and getting key messages across to stakeholders.

How to Create a Waterfall Chart in Excel

Now that we understand what waterfall charts are and why they‘re useful, let‘s go through the process of actually building one from scratch in Excel. We‘ll use a simple example of visualizing monthly cash flow throughout a year.

Step 1: Prepare and Format Your Data

The first step is to get your data in the proper format for creating a waterfall chart. You‘ll need a minimum of 4 columns:

• A labels column with categories or time periods
• A base column with starting values for each row
• A rise column with positive values that increase the total
• A fall column with negative values that decrease the total

Start by entering your labels in column A, and your first base value in column B. Then fill out the rise and fall columns, C and D, with the appropriate values for each row:

Labels Base Rise Fall
Jan 1000 500 0
Feb 0 750 -200
Mar 0 0 -350
…

Note that only the first row will have a base value – the rest should be 0. The rise and fall columns cannot both have values in the same row.

Step 2: Insert the Waterfall Chart

With your data properly formatted, you‘re ready to turn it into a waterfall chart.

Select your data range, then go to the Insert tab on the ribbon and click the Waterfall chart button in the Charts group. In the menu that appears, select the top left option for a standard waterfall chart.

Excel will generate a basic waterfall chart based on your data. The starting and ending columns will be colored gray, with rises shown in green and falls shown in red.

Step 3: Add Totals and Subtotals

To complete the waterfall effect and make the changes in value clearer, we need to add a row at the bottom that shows the final total value across all periods. You can also add subtotal rows after each quarter or other relevant interval.

To do this, add a new row to your data table at the bottom and label it "Total". In the base column, enter a formula to calculate the ending value, like =B2+SUM(C2:C13)-SUM(D2:D13) for a year‘s worth of data. Then fill in 0s for the rise and fall columns. Repeat this process to add quarterly subtotal rows if desired.

Now when you update the data range for your chart to include the new total/subtotal rows, they will automatically be added and colored gray.

Step 4: Format and Customize

At this point you have a basic working waterfall chart, but there‘s much more we can do to clean it up and make it as clear and compelling as possible. Some key formatting steps:

Add data labels: Select the chart and go to the Chart Design tab, then click Add Chart Element > Data Labels > Outside End. This will display the values for each rise and fall column. You can modify the label text as needed.

Remove gridlines: For a cleaner look, remove the gridlines by going to Chart Design > Add Chart Element > Gridlines > None. Similarly, remove the legend if it isn‘t needed.

Customize colors: To change the default colors, select the "rises" or "falls" columns, right-click and choose "Format Data Series". In the pane that appears, select "Fill" and choose your desired colors.

Add a title: Lastly, don‘t forget to give your chart an informative title that describes the key message your waterfall chart is meant to convey. Highlight the generic "Chart Title" and replace it with your own.

Feel free to experiment with other chart elements like axis labels and number formats until you get a waterfall chart that effectively communicates your data.

Tips and Best Practices

Here are some tips to keep in mind as you create your own waterfall charts:

Use rises and falls correctly: Rises should always be positive numbers that increase the total, while falls are negative numbers that decrease it. Double check that you haven‘t mixed these up.

Keep it simple: Waterfall charts are most effective when they focus on a single sequence of changes. Avoid the temptation to cram too many data points or categories into one chart. If needed, break your chart into stages or create multiple waterfalls.

Emphasize key data points: Use formatting to draw attention to the most important rises, falls, and totals. You can make columns wider, use bright colors, or add special labels.

Explain rises and falls: Help your audience understand what each rise and fall column represents by using clear, specific labels like "New Customer Revenue" or "One-Time Legal Fees".

Provide context: Your waterfall chart should include a title explaining the scope and purpose of the data, as well as any additional context in subtitles or labels. Don‘t make your audience guess what your waterfalls mean.

Advanced Waterfall Chart Techniques

Once you‘ve mastered the basics, you can take your waterfall charts to the next level with advanced Excel techniques:

Conditional formatting: Use Excel‘s conditional formatting feature to automatically color-code rises and falls based on their values or other criteria. This is helpful if you need to create waterfalls dynamically from large datasets.

Formulas: By using cell references and formulas throughout your data table, you can create dynamic waterfall charts that automatically update when data is changed. For instance, by having quarterly subtotals reference the preceding rises and falls, they will always reflect what‘s currently in those columns.

Pivot tables: If you‘re working with large, complex datasets with many rows and columns, you can use pivot tables to quickly summarize data into a format ready for waterfall charts.

Macros and automation: For high-volume, recurring reporting, you can use VBA and macros to automatically generate waterfall charts from updated data sources. This is a major time-saver compared to building waterfall charts manually each time.

Alternatives to Waterfall Charts

Waterfall charts are a specific tool for a specific job – illustrating how a starting value increases and decreases to arrive at an ending value. However, they‘re not the only way to show financial data or changes over time. Here are some other chart types to consider:

Line charts: A line chart with markers is a good alternative if you want to show trends over time without emphasizing the rises and falls between data points.

Column charts: Regular or stacked column charts can also show how different values or categories contribute to a total, without the connected waterfall effect.

Pie charts: If you want to show % breakdown of positive and negative factors related to a total value, a pie chart might be a better choice than a waterfall.

The key is to choose a chart type that clearly and accurately represents the story you want to tell with your data. Experiment with different chart types and see which one resonates with your audience.

Waterfall Chart Examples

Need some inspiration? Here are a few examples of waterfall charts being used effectively:

• A waterfall chart showing how monthly sales revenue rises and falls due to various factors like seasonality, promotions, or store closings, leading from beginning to end of year sales totals

• A chart visualizing project budget status, starting with the initial approved budget, and showing increases and decreases from scope changes, material costs, or labor variances over time

• A waterfall chart illustrating how an initial savings account balance grows through deposits and interest earnings, while falling periodically due to withdrawals and fees

The possibilities are endless – any situation where you need to explain a starting point, an ending point, and the specific ups and downs in between is a good candidate for a waterfall chart.

Conclusion

Waterfall charts are a powerful way to visualize and explain financial data, walking your audience through a clear story of how you got from point A to point B. By following the step-by-step instructions in this guide, you‘ll be able to create effective, professional-quality waterfall charts in Excel that get your message across loud and clear.

Remember, the key to a successful waterfall chart is clean, well-structured data, thoughtful formatting, and a focus on the key rises, falls, and totals you want to highlight. Keep practicing with different datasets and scenarios until you can build waterfalls with ease.

With waterfall charts added to your data visualization toolkit, you‘ll be prepared to explore and present financial data like never before. Rather than simply stating the end result, you can show the cumulative impact of positive and negative factors – and your audience will thank you for it.