Self-Host GDPR-Compliant Club Accounting and Membership Fees: Setting Up and Securely Operating Free Open-Source Tools Like InvoicePlane, Firefly III, and Kimai on Virtualmin

Why Clubs Should Self-Host Their Accounting

Clubs often manage sensitive data of their members: names, addresses, bank details, and fee payments. This data is subject to the GDPR. Many clubs use cloud services where it is unclear where the data is stored and who can access it. A self-hosted solution gives you full control over the data and helps meet GDPR requirements. Additionally, there are no monthly fees for commercial software.

With your own server or virtual server, you can install open-source tools like InvoicePlane, Firefly III, and Kimai. These cover invoicing, financial management, and time tracking – ideal for clubs that want to organize their accounting and membership fees efficiently.

The Right Open-Source Tools for Your Club

InvoicePlane: Invoices and Membership Fees

InvoicePlane is a comprehensive invoicing software. You can use it to create membership fees as recurring invoices, track payments, and send reminders. The software is multilingual and supports German invoice formats. Particularly practical: you can create different types of fees (e.g., for families, individual members, supporting members) and assign them automatically.

Firefly III: Financial Management and Budgeting

Firefly III is a powerful financial manager. It helps you categorize income and expenses, plan budgets, and create reports. For clubs, Firefly III is suitable for monitoring cash management and managing reserves. The software offers an API and can be linked with other tools.

Kimai: Time Tracking for Projects and Activities

Kimai is a professional time tracking tool. Clubs can use it to record working hours for projects, events, or funding measures. This is helpful for documenting volunteer work or billing grants.

Virtualmin as a Hosting Environment

Virtualmin is a powerful control panel for Linux servers. It simplifies the management of websites, databases, and email accounts. With Virtualmin, you can create a separate subdomain for each tool and operate them in isolation. This increases security and facilitates backups.

For operation, we recommend a virtual server with sufficient RAM (at least 4 GB) and storage. Alternatively, you can use web hosting if you do not want to administer a server. However, check whether your host provides the required PHP versions and databases.

Step-by-Step Setup on Virtualmin

1. Create Subdomains and Databases

Log in to Virtualmin and create a subdomain for each application, e.g., invoices.your-club.com, finances.your-club.com, and times.your-club.com. Create a MySQL database and a database user for each subdomain.

2. Install InvoicePlane

Download InvoicePlane from the official website, unzip it, and upload the files to the subdomain's directory. Run the installation routine and enter the database access data. Follow the instructions. Then set up the desired fee types.

3. Install Firefly III

Firefly III can be installed via Composer or as a ready-made package. Upload the files, set the required write permissions, and configure the .env file with the database data. Run the migrations and create an admin user.

4. Install Kimai

Kimai requires PHP and a database. Download the latest version, unzip it, and adjust the configuration. Run the installation via the command line or the browser. Create users and projects.

Secure Operation and GDPR Compliance

To comply with the GDPR, you should consider the following points:

• Encrypted connections: Set up SSL certificates for all subdomains (e.g., Let's Encrypt). Virtualmin offers an easy way to do this.
• Regular backups: Back up the databases and files regularly, preferably encrypted and in a secure location.
• Access restriction: Limit access to the applications to authorized persons. Use strong passwords and two-factor authentication if supported.
• Data processing agreement: If you use a host, sign a data processing agreement (DPA). With self-hosting on your own server, this is not required.
• Data minimization: Collect only the data you really need. Delete data when it is no longer required.
• Transparency: Inform your members in the privacy policy about the processing of their data.

With Virtualmin, you can also configure the firewall and set up Fail2ban to block unauthorized access.

Conclusion: Self-Hosting Is Worthwhile for Clubs

The combination of InvoicePlane, Firefly III, and Kimai on Virtualmin offers clubs a cost-effective and GDPR-compliant solution for accounting, financial management, and time tracking. You retain control over the data and can adapt the tools to your club's needs. With a virtual server or web hosting from DezHost, you have the right basis. If you have questions about setup or domains, our contact team will be happy to help.