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Tax firms today need more than just software access. They need a flexible, secure, and high-performance environment where teams can work remotely, collaborate easily, handle client data safely, and manage heavy tax-season workloads without disruption.
For firms using UltraTax CS, two popular options are Virtual Office CS and UltraTax cloud hosting. While both help firms access UltraTax in a cloud environment, they differ in terms of control, flexibility, application support, performance, and overall IT management.
If you are unsure which option is better for your tax firm, this blog compares Virtual Office CS and UltraTax cloud hosting across key parameters to help you make the right choice.
What is Virtual Office CS?
Virtual Office CS is Thomson Reuters’ in-house cloud environment that enables accountants and tax preparers to remotely access the desktop-based CS Professional Suite applications, such as UltraTax CS and Accounting CS.
It relieves them from in-house IT deployment and gives them a platform to collaborate with clients. The applications are hosted on Thomson Reuters data centers and delivered over the internet to tax preparers. For firms that prefer only CS Professional Suite Applications, Virtual Office CS can be an ideal solution.
What is UltraTax Cloud Hosting?
UltraTax cloud hosting is a service offered by third-party cloud service providers. Providers host UltraTax software and data, along with other applications, on their cloud servers and charge on a pay-as-you-go basis. You get all the benefits of UltraTax desktop software on the cloud, plus better customization and integration options.
Virtual Office CS vs. UltraTax Cloud Hosting: A Comparison
Let’s discuss some features that differentiate Virtual Office CS from third-party UltraTax cloud hosting services.
1. Diverse Solutions
Virtual Office CS is a Thomson Reuters-managed cloud environment built mainly for CS Professional Suite applications and select Microsoft products. It works well for firms that want a standardized Thomson Reuters-hosted setup rather than a highly customized cloud environment.
On the other hand, UltraTax cloud hosting offers a diverse range of solutions, enabling customers to choose based on their budget and business requirements. For instance, you can choose between a public or private server. A public server offers you a shared environment with limited IT resources.
However, it is more affordable and a good choice for small accounting firms or independent accountants. In contrast, a private server offers dedicated resources with enhanced security protocols. However, it costs significantly more than a public server.
2. Data Security
With the average cost of a data breach exceeding 4 million in 2025, data security is the top priority for any accounting firm. Consequently, both Virtual Office CS and third-party hosting providers implement robust security protocols to protect data.
Virtual Office CS offers security features, such as 256-bit data encryption and multi-factor authentication through the Thomson Reuters Authenticator. Thomson Reuters also deploys access controls to prevent unauthorized access. Moreover, data backup is taken daily at 2.30 a.m. ET on secure cloud servers to ensure business continuity.
On the other hand, the security environment of UltraTax cloud hosting may vary by the provider. For instance, the best providers implement all the above-mentioned security features. However, they also deploy advanced security methods and technologies, such as threat hunting, vulnerability management, risk assessment, managed EDR, and threat intelligence. Moreover, they deploy automated backup and disaster recovery to ensure continuous operations even during a natural disaster.
Therefore, it is critical to analyze each provider’s security posture before comparing it with Virtual Office CS.
3. Pricing
Thomson Reuters does not mention any exact pricing for Virtual Office CS. Instead, they request that you complete a form so a sales representative can contact you.
For UltaTax cloud hosting, service providers offer transparent and diverse pricing plans. You can visit their website and select the pricing plan that fits your business needs. Some hosting providers also allow you to customize the pricing plan by selecting the required IT resources.
4. Customer Support
Customer support is essential to ensure the quick resolution of any issue, especially during the busy tax season. Thomson Reuters offers customer support for Virtual Office CS only on weekdays, from 9 a.m. to 6 p.m. ET. Moreover, if you want any technical assistance, it is available only on specific days and timings, through phone and chat support.
On the other hand, UltraTax hosting providers such as Ace Cloud Hosting offer 24/7/365 customer support, even on weekends and public holidays. In addition, they offer multiple communication channels, such as mail, phone, chat, and a bot, so you can contact them quickly. Most competent providers provide you with a support manager for personal assistance. Moreover, the service levels are guaranteed in the SLA.
5. App Integration
Virtual Office CS enables tax firms to create a comprehensive application ecosystem of CS Professional Suite Applications. Moreover, it offers integration with Microsoft products, such as Office Exchange to enhance tax workflows.
However, your tax process requires integrating UltraTax with third-party applications, such as SmartVault, to support complementary tasks. Virtual Office CS does not allow easy integration with most third-party applications. Moreover, it poses some limitations on Microsoft and other applications. For instance, FileCabinet CS is limited to Flat File data locations only.
UltraTax cloud hosting, on the other hand, is a highly scalable solution that allows integration of all UltraTax add-ons. Cloud service providers scale your cloud servers accordingly, ensuring no compromise on performance. In addition, you can integrate other CS Professional suite apps without restrictions to automate your tax workflow.
6. Performance
While accessing tax applications remotely, tax preparers expect uninterrupted and smooth operations. Virtual Office CS’s performance depends on the local network’s bandwidth. If there is even a minor network issue, it can cause issues while signing in and operational latency. As a result, Thomson Reuters recommends limiting all resource-intensive and unwanted processes that utilize significant bandwidth.
UltraTax cloud hosting providers can offer dedicated or high-performance cloud environments for tax applications and data. When the environment is properly sized and optimized, firms can get smoother remote access, better resource allocation, and stable performance during tax season.
Moreover, you can add multiple users and applications to a single cloud desktop without affecting UltraTax’s performance.
Host UltraTax CS, SmartVault, Microsoft 365, and other tax applications in one secure cloud workspace.
7. Scope of Customization
Every accounting process is different. Businesses demand cloud solutions that fit their budget and business operations. Virtual Office CS offers a proprietary hosting solution for the CS Professional Suite without any scope of customization. You can opt for Virtual Office along with the CS Suite products, and you get a common solution like everyone else.
UltraTax CS hosting is a highly customizable solution. You can choose the virtual server/ desktop configuration according to the requirements. Moreover, they also enable you to choose additional services, depending on the provider, such as data backup or GPU support.
8. Data Centers
The data center of a cloud provider is vital as it is where the application and data reside. Thomson Reuters has created the Virtual Office CS cloud environment in its data centers with advanced infrastructure, redundant hardware, and multi-level security.
In the case of UltraTax hosting, data centers may vary among providers. You must enquire about the data center in which your tax process will reside, and choose the provider with Tier-4 data centers. These data centers are highly advanced with equipment redundancy, fault-tolerant systems, and disaster recovery.
9. Integrated CS Environment
Virtual Office CS is optimized for Thomson Reuters products, such as UltraTax and Accounting CS. Hence, if you are planning to use only CS Professional Suite applications, Virtual Office CS will offer you a complete ecosystem.
On the other hand, some cloud hosting providers may not offer cloud solutions optimized only for Thomson Reuters products. They offer general cloud solutions, where you can host these applications.
If you find a cloud provider that offers Thomson Reuters-specific hosting at a lower price, it can be the best choice.
10. User Interface
Thomson Reuters offers Netstaff CS interface that contains everything you need for the tax process, including Virtual Office CS, file exchange, document presentation, and employee portal.
UltraTax cloud hosting providers have their proprietary online portals, where users can log in via a web browser to access UltraTax and other applications from remote devices.
See the difference in performance, security, and accessibility with a free 7-day trial.
The Right Choice Depends on Your Firm’s Needs
Choosing between Virtual Office CS and UltraTax cloud hosting depends on how your tax firm works today and how you plan to scale in the future. While Virtual Office CS offers a Thomson Reuters-managed cloud environment, UltraTax cloud hosting gives firms more flexibility to host UltraTax along with other tax, accounting, and business applications in one secure cloud workspace.
Before making a decision, evaluate your firm’s current workflow, application requirements, remote access needs, security expectations, and tax-season workload. It is also important to involve key stakeholders, including tax preparers, IT teams, and firm owners, so the final choice supports both daily operations and long-term growth.
The best way to decide is to experience both options in real working conditions. You can explore Virtual Office CS and also take a free trial from an UltraTax hosting provider to compare performance, accessibility, and ease of use.
Want to see how UltraTax hosting works? Ace Cloud Hosting offers cloud hosting solutions customized for Thomson Reuters applications, helping tax firms access UltraTax CS securely from anywhere. Book a 7-Day UltraTax cloud hosting free trial.
