Tax season has a way of exposing weak technology decisions. A staff member needs a client return at home, a partner is traveling, or an auditor requests records after business hours. If the answer is to email a file, share a password, or open a remote desktop port to the internet, the firm has created a security problem.
Secure remote access for accountants should let authorized staff work from nearly anywhere without putting taxpayer data, firm credentials, or line-of-business applications at unnecessary risk. The goal is not simply to make remote work possible. It is to control who connects, what they can reach, how data is handled, and what happens if a device or account is compromised.
Why accounting firms are frequent targets
CPA firms hold exactly the information criminals want: Social Security numbers, bank account details, W-2s, payroll records, business financials, and tax identification numbers. That data can support identity theft, tax fraud, wire fraud, and extortion. A successful phishing email directed at one employee can provide an attacker with access to far more than one inbox.
The risk rises when firms rely on familiar shortcuts. Shared logins make it impossible to know who accessed a return. Personal computers may lack current security updates or endpoint protection. Files copied to local desktops can remain there long after the engagement ends. Remote Desktop Protocol, or RDP, exposed directly to the internet is especially dangerous because it is regularly scanned and attacked.
Remote access also has a compliance dimension. Firms subject to the FTC Safeguards Rule need a written information security program, access controls, multi-factor authentication, monitoring, and an incident response plan that match the sensitivity of their data. The specific obligations vary by firm, but an undocumented, loosely managed remote setup is difficult to defend during an audit or after an incident.
What secure remote access for accountants should include
There is no single product that makes a firm secure. A sound setup combines identity controls, protected connections, managed devices, limited permissions, and oversight. The right design depends on the firm’s applications, office infrastructure, number of remote staff, and whether employees use company-issued devices.
Start with verified identities
Every employee should have an individual account. This is basic accountability: when access is tied to one person, the firm can review activity, remove access immediately when employment changes, and avoid the exposure created by shared passwords.
Multi-factor authentication should be required for email, cloud storage, VPN access, remote desktop gateways, and accounting or tax applications when supported. A password alone is no longer enough. Prefer authenticator apps, security keys, or number matching over text-message codes when possible, since attackers can target SMS-based verification through phishing and phone-number takeover schemes.
Conditional access policies add useful context. For example, a firm can block sign-ins from countries where it does not do business, require stronger verification for unfamiliar devices, and deny access from devices that do not meet basic security requirements. These controls reduce exposure without forcing staff through unnecessary steps every time they work remotely.
Use a protected connection, not an open door
A properly configured business VPN can securely connect authorized users to resources at the office. For many small and midsize firms, a firewall-based VPN with multi-factor authentication is a practical approach, particularly when staff need access to an on-premises file server, tax software, or practice management system.
However, a VPN gives a device a path into the network, so it must be designed carefully. Users should receive access only to the systems they need. Split tunneling, network segmentation, and firewall rules should be reviewed based on the firm’s workflow and risk tolerance. A partner who needs access to a document management system does not necessarily need access to every server, printer, and administrative tool on the network.
In other cases, a remote desktop gateway or virtual desktop environment may be the better choice. Instead of moving client data to an employee’s computer, the user works inside a secured desktop session while the information stays on a server or in a controlled cloud environment. This can be especially useful for seasonal staff, contractors, or firms that process highly sensitive returns.
The trade-off is cost and management. Virtual desktops require planning around server capacity, licensing, internet performance, printing, and support. For firms with a small number of remote users, a carefully configured VPN and managed laptop may be sufficient. For firms with a distributed workforce or strict data-handling needs, keeping work inside a virtual environment can provide stronger control.
Secure the device that connects
A secure connection cannot compensate for an unmanaged computer. A home laptop with an old operating system, weak password, local administrator rights, and no endpoint protection can become the entry point for a larger incident.
Company-issued devices are easier to secure because the firm can enforce encryption, screen-lock policies, automatic updates, endpoint detection and response, web filtering, and remote wipe capabilities. They also give IT staff a consistent support environment during the busiest part of the year.
Bring-your-own-device policies can work, but only if they are written and enforced. At a minimum, personal devices used for firm work should have current operating systems, full-disk encryption, endpoint protection, strong login credentials, and separate user accounts. The firm should also decide whether files may be downloaded locally and how access will be removed when the working relationship ends. For many accounting firms, limiting personal devices to browser-based tools and keeping tax applications inside a virtual desktop is the safer compromise.
Protect files from accidental exposure
Sending returns or supporting documents through ordinary email creates unnecessary risk. Email is frequently misaddressed, forwarded, and targeted by phishing campaigns. Password-protected attachments help only when the password is delivered through a separate trusted channel, and they still leave the firm with limited visibility into where the file goes next.
Use approved document-sharing and client portal processes with access expiration, permissions, and activity records. Staff should know where client documents belong, how to send them securely, and when to remove external access. A clear process matters because employees under deadline pressure will use whatever method is fastest.
Data loss prevention settings can provide another layer of protection by identifying sensitive information such as Social Security numbers and warning or blocking users before they send it outside the organization. These settings require testing. If they create constant false alerts, staff will stop taking them seriously. If they are too loose, they offer little protection.
Monitor access and prepare for failure
Security is not finished when remote access is installed. Firms need visibility into sign-in attempts, unusual locations, repeated failed logins, privilege changes, and new forwarding rules in email. Alerts should be reviewed by someone who knows what normal activity looks like and can respond quickly when it does not.
Logging is also valuable after an incident. If a mailbox is compromised, the firm should be able to determine which accounts were accessed, whether files were downloaded, and whether suspicious forwarding or payment instructions were sent. Without records, response becomes slower and more expensive.
Backups remain essential, but they serve a different purpose from remote access controls. A secure, tested backup can help recover from ransomware or accidental deletion. It will not prevent a criminal from using stolen credentials to read client information. Firms need both recovery capability and preventive security.
An incident response plan should address the practical first hour: who can disable an account, who contacts the IT provider, how users report a suspicious email, and how client communications are handled if exposure is confirmed. Staff should practice phishing awareness regularly, especially before tax season, when fraudulent document requests and payment messages increase.
A practical way to assess your firm
Start by mapping the work rather than buying technology first. Identify every system employees need remotely, where client data is stored, which staff roles require access, and whether data can be downloaded to endpoints. Then review who has administrative access, whether multi-factor authentication is active everywhere it should be, and whether former employees or vendors still have accounts.
Next, test the external perimeter. Internet-facing firewalls, VPN services, email systems, and remote access tools should be reviewed for outdated software, weak configurations, and exposed services. Penetration testing and vulnerability assessments can identify gaps that are not visible from inside the office.
For accounting firms in Lombard and the Chicago suburbs, a local IT partner can help document the environment, deploy secure firewall and VPN access, manage endpoints, and provide onsite support when a network or hardware issue cannot be solved remotely. The best arrangement is one that gives the firm a clear owner for ongoing patching, account changes, monitoring, and emergency response – not just a one-time installation.
Remote access should make deadline-driven work easier without asking accountants to choose between productivity and client confidentiality. When identities, devices, connections, and data are managed together, staff can focus on serving clients while the firm keeps control of its most sensitive information.