Protecting financial data: key security considerations for businesses

Financial data plays a critical role in every business, supporting daily operations, decision-making and long-term planning. From bank account details and payroll records to invoices, customer information and financial reports, businesses rely on sensitive financial information every day.

Yet as financial processes become increasingly digital, protecting this information has become more challenging.

Accounting platforms, online banking, cloud storage, payroll systems, email and payment platforms have made financial management faster and more accessible. However, the growing use of digital systems also means financial information is accessed, shared and stored across more platforms, increasing the risk of unauthorised access or exposure.

A compromised email account, weak password, excessive user access or fraudulent payment request can lead to financial loss, operational disruption and the exposure of sensitive information. This means businesses need to look beyond securing their accounting software and take a broader approach to protecting financial information across the organisation.

Why financial data security matters

Financial information provides insight into how a business operates, including its revenue, expenses, payments and business relationships. It may also contain personal information relating to employees, clients and other individuals.

If financial information falls into the wrong hands, the impact can go far beyond the loss of data. A security incident can result in financial fraud, operational disruption, reputational damage, loss of client trust and potential compliance or regulatory issues.

Financial information is also frequently connected to payment processes. This means a security incident can potentially affect not only information but also the movement of money.

For example, a criminal who gains access to a business email account may attempt to impersonate an employee or supplier and request a change to bank details. If the request is accepted without proper verification, funds could be transferred to an incorrect account.

These risks demonstrate why financial data security needs to be considered as part of everyday financial management rather than treated as a separate technology issue.

Know what financial information you hold

The first step towards protecting financial information is understanding what information exists and where it is stored.

Businesses often have financial information spread across multiple systems. Accounting software may contain transaction records and financial statements, while payroll platforms hold employee information. Emails may contain invoices and payment instructions, and spreadsheets may contain budgets, forecasts or other sensitive data.

Without a clear understanding of where information is located, it becomes difficult to determine who should have access to it or how it should be protected.

Businesses should identify the types of financial and personal information they hold and consider:

• Where is the information stored?
• Who can access it?
• Why do they need access?
• Is it shared with external providers?
• How long does the business need to retain it?
• What happens when the information is no longer required?

This creates a clearer picture of the organisation’s financial information environment and makes it easier to identify potential weaknesses.

Limit access to sensitive information

Not every person in a business needs access to every financial record.

Giving employees access based on their responsibilities can reduce unnecessary exposure. Someone who only needs to process invoices, for example, may not require access to payroll information or detailed financial reporting.

Access permissions should also be reviewed regularly. Employees may change roles, take on new responsibilities or leave the business. When this happens, their system access should be updated accordingly.

The same principle applies to external providers. Businesses may work with accountants, bookkeepers, payroll providers, technology companies and other service providers that require access to financial information. Access should be limited to what is necessary for the services being provided.

A well-managed access structure helps ensure that sensitive information is available to the right people without making it unnecessarily accessible across the organisation.

Strengthen passwords and account security

Passwords remain an important part of protecting financial systems, but relying on passwords alone creates unnecessary risk.

Businesses should use strong and unique passwords for important accounts and avoid using the same password across multiple services. Password managers can also help employees create and securely manage unique passwords.

Multi-factor authentication provides another important layer of protection. Instead of relying only on a password, it requires an additional form of verification when someone signs in.

This is especially important for accounts that provide access to financial systems, email, online banking and other critical business platforms.

If an attacker obtains a password, additional authentication can make it significantly more difficult for them to access the account.

Be on alert for phishing and financial fraud

Not all financial security risks depend on sophisticated technology. Some rely on social engineering, where attackers manipulate people into taking an action that appears legitimate.

Phishing emails and fraudulent payment requests can be designed to look like genuine communications from clients, employees or senior management.

Businesses should establish clear procedures for handling sensitive financial requests. A request to change client bank details, transfer funds or provide confidential information should not automatically be accepted because it appears to come from a familiar contact.

Important requests should be independently verified using trusted contact information. For example, if a client requests a change to their bank account details by email, the business could contact the client through an established phone number to confirm the request.

Employees should also receive regular guidance on recognising suspicious emails, links, attachments and payment requests.

Creating a culture where employees feel comfortable questioning unusual requests can be just as important as having technical security controls in place.

Keep systems and software updated

Financial systems and business applications need to be maintained just like any other part of the business.

Software providers regularly release updates that can improve functionality, fix errors and address security weaknesses. Delaying important updates can leave systems exposed to known vulnerabilities.

Businesses should therefore have a consistent process for keeping operating systems, applications, browsers and other relevant software up to date.

This is particularly important for devices that are used to access accounting platforms, financial information and other sensitive systems.

Regular updates are a relatively simple measure, but they form an important part of maintaining a secure digital environment.

Protect devices and financial systems

Financial information can be accessed from computers, laptops, mobile devices and other connected systems. Each device can therefore become a potential entry point into the organisation.

Businesses should ensure that devices used to access financial information are appropriately secured. This can include using screen locks, security software, encryption where appropriate and controlled user access.

Remote working also requires consideration. Employees accessing financial systems from outside the office should use secure connections and follow the organisation’s security procedures.

Businesses should also avoid storing sensitive financial information unnecessarily on personal devices or unmanaged systems.

The objective is to ensure that financial information remains protected regardless of where it is accessed.

Maintain reliable backups

Backups are an important part of financial data protection.

If information is accidentally deleted, corrupted or made unavailable following a security incident, reliable backups can help a business recover important records and continue operating.

Businesses should determine which information needs to be backed up, how frequently backups should occur and how the backups can be restored.

Backups should also be protected from unauthorised access. Simply creating copies of financial information does not provide complete protection if those copies can be easily accessed or compromised.

Regularly testing backups helps businesses confirm that critical information can be successfully restored when needed.

Have a response plan

Even with strong preventative measures, no business can remove every security risk.

A clear response plan can help reduce confusion when an incident occurs. Businesses should know who is responsible for responding to a suspected breach, which systems need to be secured and how important stakeholders will be informed.

The plan should cover situations such as compromised accounts, fraudulent payments, lost devices, unauthorised access and potential exposure of sensitive information.

Businesses should also understand their legal and regulatory responsibilities when personal information is involved. Depending on the circumstances, a data breach may create notification or other compliance obligations.

Having a plan in place before an incident occurs allows the business to respond more quickly and make informed decisions under pressure.

Make security part of financial management

Financial data security should not be viewed as a one-time project. Businesses need to review their processes as systems, employees, clients and operational requirements change.

Regular access reviews, employee awareness, software updates, secure payment procedures, reliable backups and clear response processes can collectively create a stronger financial security environment.

The most effective approach is also one that fits the business. A growing organisation with multiple systems and external providers may face different risks from a small business operating with a simpler financial structure.

The focus should therefore be on understanding the information that matters most, identifying where it could be exposed and putting practical controls in place to reduce those risks.

Protecting financial information with the right support

Strong financial data security goes beyond technology. It requires businesses to understand their vulnerabilities, address security gaps and ensure their people are equipped to recognise and respond to potential threats.

4walls, our sister company, helps businesses take a practical approach to cybersecurity. Through cybersecurity assessments, they identify weaknesses across people, systems and processes and provide clear, actionable recommendations to strengthen your security posture. Their cybersecurity awareness training and phishing simulations also help employees recognise common threats and respond to them with greater confidence.

By combining security assessments, practical recommendations and ongoing awareness, 4walls helps businesses strengthen their cyber resilience and protect the financial and business information they rely on.

Contact the team to discuss how 4walls can help strengthen your business’s cybersecurity and protect your financial information.