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Make better decisions through risk modeling and analysis in Excel

From the financial to the scientific, anyone who faces uncertainty in their quantitative analyses can benefit from @RISK. What are the chances of making money or taking a loss on your next project? How about the probabilities of staying within budget or needing a contingency? @RISK answers these risk modelling questions and more – right in your Excel spreadsheet.

  • Get help with your risk management and decision making.
  • Handle uncertainty and variability
  • Avoid pitfalls and uncover opportunities with risk analysis
  • Communicate risk to others
  • Integrates with Microsoft Excel

@RISK gives us the power to perform Monte Carlo methods in a single cell in Excel. This saves us time and simplifies the spreadsheets we work in.


What is @Risk?

Use Monte Carlo Simulation to see all possible outcomes

@RISK (pronounced “at risk”) software is an add-in tool for Microsoft Excel that helps you make better decisions through risk modelling, simulation and analysis. It does this using a technique known as Monte Carlo simulation.

Monte Carlo analysis computes and tracks many different possible future scenarios in your risk model and shows you the probability of each occurring. This way, @RISK shows you virtually all possible outcomes for any situation. This probabilistic approach makes @RISK a powerful tool that you can use to judge which risks to take and which ones to avoid—critical insight in today’s uncertain world.

Model risks and uncover new opportunities with @Risk

From the financial sector, where investments and portfolios are analyzed for risk, to scientific fields, such as engineering and health sciences, where the risk of certain outcomes or events is evaluated, @RISK provides a robust toolset to help professionals make informed decisions. @RISK helps both Fortune 500 companies and private consultancies paint a realistic picture of possible scenarios. This allows businesses to not only buffer and mitigate risks but also identify and exploit growth opportunities.

  • Model Risk Factors and Protect Yourself with Contingency Planning
  • Plan Better Strategies
  • Avoid Pitfalls and Uncover Opportunities with Risk Analysis

Key features in @Risk

Monte Carlo Simulation

By sampling different possible inputs, @RISK calculates thousands of possible future outcomes and the chances they will occur. This helps you avoid likely hazards—and uncover hidden opportunities.

Monte Carlo Simulation

100% Excel Integration

@RISK integrates seamlessly with Excel’s function set and ribbon, letting you work in a familiar environment with results you can trust.

100% Excel Integration with @Risk

Sensitivity Analysis

@RISK identifies and ranks the most important factors driving your risks so that you can plan strategies—and resources—accordingly.

Sensitivity Analysis

Graphs and Reports

@RISK offers various customizable, exportable graphing and reporting options that let you communicate risk to all stakeholders.

Graphs and Reports

Extensive Modeling Features

With a broad library of probability distributions, data fitting tools, and correlation modelling, @RISK lets you represent any scenario in any industry with the highest level of accuracy.

Extensive Modeling Features with @Risk


What’s new in @RISK 8?

A New Generation in Risk Analysis

@RISK 8 is a major upgrade representing the culmination of feedback from thousands of users. We focused on what is most important to you based on the analyses you do every day. Furthermore, @RISK 8 has been rebuilt on the latest programming technology from the ground up. This forward-looking foundation ensures that @RISK will continue to provide the most reliable, accurate, and robust quantitative risk analysis available anywhere for years to come.

But make no mistake: while @RISK 8 is better, faster, and stronger than ever, it is still as easy to use as 1-2-3.

Fresh new look, Streamlined workflows

As a result of user input, the interface is now more intuitive for both new and experienced practitioners alike, reducing learning curves and the time it takes to perform analyses. @RISK 8 offers a thoroughly modern look and feel throughout the entire application, from the all-new command Ribbon to every dialogue window. What’s more, @RISK 8 is available in both English and Spanish.

Faster performance

From defining input distributions to correlating variables to identifying output cells, every aspect of model management has been re-engineered for fewer lags and overall more responsive performance. Likewise, from analysis of simulation data to the generation or reports to share with others, everything to do with results analysis has been significantly sped up. In addition, you have greater control than ever, with more progress bars and ways to cancel long operations.

Easier modelling

The Define Distribution window, the first step in any @RISK analysis, has been overhauled to simplify anything you may need to do when creating or editing @RISK distribution functions. Correlations are much faster to define, and the performance of time series fitting has been significantly enhanced. Plus, the entire Model Window is more flexible and simpler than ever.

Communicate and share results more clearly

From Summary Trend to 2-Way Tornado charts, @RISK 8 offers significantly improved graphing capabilities, as well as an entirely new feature set for generating custom reports to share with colleagues. The best part is, it does all this 10 times faster than before! A new Explore menu offers all results graphs and reports in one place. And the Browse, Summary, and other windows have been overhauled for faster workflows.

Get started fast with @Risk

@RISK 8 ships with an all-new tutorial in the form of step-by-step example spreadsheets that are designed with ease-of-use and sequential learning in mind. Each example builds on the one before, and all interactively allow you to step through them with point-and-click ease. The new example library has been rewritten by professional consultants to help decision makers get results fast, out of the box.

Solid analytics and tight Excel integration

Of course, another key reason Fortune 1000 companies rely upon @RISK every day has long been the power of its rock-solid analytics. Version 8 takes that up a level, too, with substantial enhancements to sophisticated analytical features. In addition, @RISK 8 supports the very latest advances in Excel 2019 (such as dynamic arrays) to make your analyses even more cohesive.

Ready for the future

While @RISK 8 is a substantial upgrade in its own right, it also represents the birth of a new platform which will launch an entire generation of risk analysis advances. The new @RISK is technologically poised to take advantage of future improvements in the field of probabilistic analysis and Excel itself. Put simply, this ensures you can trust that @RISK will provide the best possible insights, whatever the future brings.

System requirements

@Risk system requirements

Operating Systems for @Risk

@RISK requires Windows 7 (SP1 or later), Windows 8, Windows 10 or Windows 11.

While there is no support for running on the native Macintosh OS, @RISK will run on a Windows environment hosted on the Mac. The following configurations are supported:

  • Windows 7 through Windows 10 running, using Boot Camp.
  • Windows 7 through Windows 10 emulation using Parallels, VirtualBox, or VMware.

Spreadsheets (Excel)

An installed copy of Microsoft Excel 2010, 2013, 2016 or 2019 for Windows or Office 365 for Windows is required. The add-in will not run with earlier versions of Microsoft Excel.

@Risk is compatible with the “On Premises” deployment option of Office 365. It is not compatible with the “Office on Demand” or “Office Web Apps” deployment options.

@RISK is not compatible with non-Microsoft spreadsheet packages.

Visual C++ Runtime Files

The add-ins require the Microsoft Visual C++ “Universal” Runtime. On a 64-bit machine, both the 64-bit and 32-bit versions of this library are required. On a 32-bit machine, only the 32-bit version of this library is required. These will be installed automatically as part of the DTS installation if they are not found on the system.

Microsoft .NET Framework 4.6.1

The software requires Microsoft .NET Framework 4.6.1. In Windows 7, the DecisionTools Suite installer will automatically install this component. In Windows 8 and Windows 10, the .NET Framework 4.0 is already installed as part of Windows. The .NET framework will be installed automatically as part of the DecisionTools Suite installation if it is not found on the system.


License Options for @Risk

The software is sold on a subscription license basis. Subscription licenses allow you to invest at a level that works for your budget and can be categorized as an operating expense. Subscriptions include unlimited email and telephone technical support and free upgrades to new versions during the subscription term. Learn more about the licensing options!

  • Single-user (Academic and Commercial pricing)
  • Volume/Multi-user
  • Concurrent/Floating Network (Simus)
  • Site or Department Wide licenses

@Risk Editions

  • Professional
  • Industrial

Features – Professional and Industrial Editions

  • Full Monte Carlo simulation with multiple sampling techniques and random number generators
  • 100% Excel integration for seamless, flexible modelling with the highest degree of accuracy
  • Intuitive, Office-standard interface for maximum efficiency
  • Over 100 distribution functions, including percentile parameters, for flexible, accurate uncertainty modelling
  • Sophisticated distribution fitting, editing, viewing, and even freehand drawing
  • Function swap to remove @RISK functions for non-users
  • Correlations and copulas for representing relationships between variables
  • Demo Mode and updating during simulation for illustration to others
  • Advanced simulation analyses such as stress testing and goal seek
  • A wide array of customizable, presentation-quality graphs
  • Exportable reports to PDF and other formats
  • Multiple views of tornado graphs for sensitivity analysis to determine critical risk drivers

Features – Industrial Edition only

  • Time-series functions that represent values which change over time
  • Fast simulation speeds with multiple, unlimited processors
  • RISKOptimizer for combining Monte Carlo simulation with optimization for budgeting, resource allocation, scheduling, and more
  • Efficient Frontier analysis to determine the optimal return at a given level of risk


@Risk Support

For technical support, please click here! (Lumivero)

Please include your serial number with all email correspondence.

Please describe your problem as detailed as possible when contacting our support. Remember to always inform about your serial/license number, product version, and your operating system.

We also recommend these online support pages and resources: