diff --git a/ct/invoiceninja.sh b/ct/invoiceninja.sh
new file mode 100644
index 000000000..01fa08d2c
--- /dev/null
+++ b/ct/invoiceninja.sh
@@ -0,0 +1,79 @@
+#!/usr/bin/env bash
+source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/build.func)
+# Copyright (c) 2021-2025 community-scripts ORG
+# Author: MickLesk (CanbiZ)
+# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
+# Source: https://invoiceninja.com/
+
+APP="InvoiceNinja"
+var_tags="${var_tags:-invoicing;business}"
+var_cpu="${var_cpu:-2}"
+var_ram="${var_ram:-2048}"
+var_disk="${var_disk:-8}"
+var_os="${var_os:-debian}"
+var_version="${var_version:-13}"
+var_unprivileged="${var_unprivileged:-1}"
+
+header_info "$APP"
+variables
+color
+catch_errors
+
+function update_script() {
+  header_info
+  check_container_storage
+  check_container_resources
+
+  if [[ ! -d /opt/invoiceninja ]]; then
+    msg_error "No ${APP} Installation Found!"
+    exit
+  fi
+
+  if check_for_gh_release "invoiceninja" "invoiceninja/invoiceninja"; then
+    msg_info "Stopping Services"
+    systemctl stop supervisor nginx php8.4-fpm
+    msg_ok "Stopped Services"
+
+    msg_info "Creating Backup"
+    mkdir -p /tmp/invoiceninja_backup
+    cp /opt/invoiceninja/.env /tmp/invoiceninja_backup/
+    cp -r /opt/invoiceninja/storage /tmp/invoiceninja_backup/ 2>/dev/null || true
+    cp -r /opt/invoiceninja/public/storage /tmp/invoiceninja_backup/public_storage 2>/dev/null || true
+    msg_ok "Created Backup"
+
+    CLEAN_INSTALL=1 fetch_and_deploy_gh_release "invoiceninja" "invoiceninja/invoiceninja" "prebuild" "latest" "/opt/invoiceninja" "invoiceninja.tar.gz"
+
+    msg_info "Restoring Data"
+    cp /tmp/invoiceninja_backup/.env /opt/invoiceninja/
+    cp -r /tmp/invoiceninja_backup/storage/* /opt/invoiceninja/storage/ 2>/dev/null || true
+    cp -r /tmp/invoiceninja_backup/public_storage/* /opt/invoiceninja/public/storage/ 2>/dev/null || true
+    rm -rf /tmp/invoiceninja_backup
+    msg_ok "Restored Data"
+
+    msg_info "Running Migrations"
+    cd /opt/invoiceninja
+    $STD php artisan migrate --force
+    $STD php artisan config:clear
+    $STD php artisan cache:clear
+    $STD php artisan optimize
+    chown -R www-data:www-data /opt/invoiceninja
+    chmod -R 755 /opt/invoiceninja/storage
+    msg_ok "Ran Migrations"
+
+    msg_info "Starting Services"
+    systemctl start php8.4-fpm nginx supervisor
+    msg_ok "Started Services"
+
+    msg_ok "Updated Successfully"
+  fi
+  exit
+}
+
+start
+build_container
+description
+
+msg_ok "Completed Successfully!\n"
+echo -e "${CREATING}${GN}${APP} setup has been successfully initialized!${CL}"
+echo -e "${INFO}${YW} Access it using the following URL:${CL}"
+echo -e "${TAB}${GATEWAY}${BGN}http://${IP}:8080/setup${CL}"
diff --git a/frontend/public/json/invoiceninja.json b/frontend/public/json/invoiceninja.json
new file mode 100644
index 000000000..10c178e93
--- /dev/null
+++ b/frontend/public/json/invoiceninja.json
@@ -0,0 +1,48 @@
+{
+    "name": "InvoiceNinja",
+    "slug": "invoiceninja",
+    "categories": [
+        3
+    ],
+    "date_created": "2025-12-09",
+    "type": "ct",
+    "updateable": true,
+    "privileged": false,
+    "interface_port": 8080,
+    "documentation": "https://invoiceninja.github.io/selfhost.html",
+    "config_path": "/opt/invoiceninja/.env",
+    "website": "https://invoiceninja.com/",
+    "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/invoice-ninja.webp",
+    "description": "Invoice Ninja is a free, open-source invoicing, quotes, expenses and time-tracking application for freelancers and businesses. Features include recurring invoices, online payments, client portal, and multi-company support.",
+    "install_methods": [
+        {
+            "type": "default",
+            "script": "ct/invoiceninja.sh",
+            "resources": {
+                "cpu": 2,
+                "ram": 2048,
+                "hdd": 8,
+                "os": "Debian",
+                "version": "13"
+            }
+        }
+    ],
+    "default_credentials": {
+        "username": null,
+        "password": null
+    },
+    "notes": [
+        {
+            "text": "First visit http://IP:8080/setup to complete the initial configuration",
+            "type": "info"
+        },
+        {
+            "text": "Database credentials are stored in ~/invoiceninja.creds",
+            "type": "info"
+        },
+        {
+            "text": "Configure SMTP settings in /opt/invoiceninja/.env for email functionality",
+            "type": "warning"
+        }
+    ]
+}
diff --git a/install/invoiceninja-install.sh b/install/invoiceninja-install.sh
new file mode 100644
index 000000000..1e6eb224a
--- /dev/null
+++ b/install/invoiceninja-install.sh
@@ -0,0 +1,168 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2021-2025 community-scripts ORG
+# Author: MickLesk (CanbiZ)
+# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
+# Source: https://invoiceninja.com/
+
+source /dev/stdin <<<"$FUNCTIONS_FILE_PATH"
+color
+verb_ip6
+catch_errors
+setting_up_container
+network_check
+update_os
+
+msg_info "Installing Dependencies"
+$STD apt install -y \
+  nginx \
+  supervisor
+msg_ok "Installed Dependencies"
+
+setup_mariadb
+MARIADB_DB_NAME="invoiceninja" MARIADB_DB_USER="invoiceninja" setup_mariadb_db
+PHP_VERSION="8.4" PHP_FPM="YES" PHP_MODULE="bcmath,curl,gd,gmp,imagick,intl,mbstring,mysql,soap,xml,zip" setup_php
+import_local_ip
+fetch_and_deploy_gh_release "invoiceninja" "invoiceninja/invoiceninja" "prebuild" "latest" "/opt/invoiceninja" "invoiceninja.tar.gz"
+
+msg_info "Configuring InvoiceNinja"
+cd /opt/invoiceninja
+APP_KEY=$(php artisan key:generate --show)
+cat <<EOF >/opt/invoiceninja/.env
+APP_NAME="Invoice Ninja"
+APP_ENV=production
+APP_KEY=${APP_KEY}
+APP_DEBUG=false
+APP_URL=http://${LOCAL_IP}:8080
+
+DB_CONNECTION=mysql
+DB_HOST=127.0.0.1
+DB_PORT=3306
+DB_DATABASE=${MARIADB_DB_NAME}
+DB_USERNAME=${MARIADB_DB_USER}
+DB_PASSWORD=${MARIADB_DB_PASS}
+
+MULTI_DB_ENABLED=false
+DEMO_MODE=false
+
+BROADCAST_DRIVER=log
+LOG_CHANNEL=stack
+CACHE_DRIVER=file
+QUEUE_CONNECTION=database
+SESSION_DRIVER=file
+SESSION_LIFETIME=120
+
+MAIL_MAILER=log
+MAIL_HOST=null
+MAIL_PORT=null
+MAIL_USERNAME=null
+MAIL_PASSWORD=null
+MAIL_ENCRYPTION=null
+MAIL_FROM_ADDRESS="noreply@localhost"
+MAIL_FROM_NAME="Invoice Ninja"
+
+REQUIRE_HTTPS=false
+NINJA_ENVIRONMENT=selfhost
+PDF_GENERATOR=snappdf
+
+TRUSTED_PROXIES=*
+INTERNAL_QUEUE_ENABLED=false
+EOF
+
+mkdir -p /opt/invoiceninja/bootstrap/cache
+mkdir -p /opt/invoiceninja/storage/{app/public,framework/{cache/data,sessions,views},logs}
+chown -R www-data:www-data /opt/invoiceninja
+chmod -R 775 /opt/invoiceninja/storage /opt/invoiceninja/bootstrap/cache
+msg_ok "Configured InvoiceNinja"
+
+msg_info "Setting up Database"
+cd /opt/invoiceninja
+$STD php artisan config:clear
+$STD php artisan cache:clear
+$STD php artisan route:clear
+$STD php artisan view:clear
+$STD php artisan migrate --force
+$STD php artisan db:seed --force
+$STD php artisan optimize
+msg_ok "Set up Database"
+
+msg_info "Configuring Nginx"
+cat <<'EOF' >/etc/nginx/sites-available/invoiceninja
+server {
+    listen 8080;
+    server_name _;
+    root /opt/invoiceninja/public;
+    index index.php;
+
+    client_max_body_size 50M;
+    charset utf-8;
+
+    gzip on;
+    gzip_types application/javascript application/x-javascript text/javascript text/plain application/xml application/json;
+    gzip_proxied no-cache no-store private expired auth;
+    gzip_min_length 1000;
+
+    location / {
+        try_files $uri $uri/ /index.php?$query_string;
+    }
+
+    location = /index.php {
+        fastcgi_pass unix:/run/php/php8.4-fpm.sock;
+        fastcgi_param SCRIPT_FILENAME $realpath_root$fastcgi_script_name;
+        include fastcgi_params;
+        fastcgi_read_timeout 300;
+    }
+
+    location ~ \.php$ {
+        return 403;
+    }
+
+    location ~ /\.ht {
+        deny all;
+    }
+
+    error_log /var/log/nginx/invoiceninja_error.log;
+    access_log /var/log/nginx/invoiceninja_access.log;
+}
+EOF
+
+ln -sf /etc/nginx/sites-available/invoiceninja /etc/nginx/sites-enabled/
+rm -f /etc/nginx/sites-enabled/default
+$STD systemctl reload nginx
+msg_ok "Configured Nginx"
+
+msg_info "Setting up Queue Worker"
+cat <<'EOF' >/etc/supervisor/conf.d/invoiceninja-worker.conf
+[program:invoiceninja-worker]
+process_name=%(program_name)s_%(process_num)02d
+command=php /opt/invoiceninja/artisan queue:work --sleep=3 --tries=3 --max-time=3600
+autostart=true
+autorestart=true
+stopasgroup=true
+killasgroup=true
+user=www-data
+numprocs=2
+redirect_stderr=true
+stdout_logfile=/var/log/invoiceninja-worker.log
+stopwaitsecs=3600
+EOF
+
+touch /var/log/invoiceninja-worker.log
+chown www-data:www-data /var/log/invoiceninja-worker.log
+$STD supervisorctl reread
+$STD supervisorctl update
+msg_ok "Set up Queue Worker"
+
+msg_info "Setting up Cron"
+cat <<'EOF' >/etc/cron.d/invoiceninja
+* * * * * www-data cd /opt/invoiceninja && php artisan schedule:run >> /dev/null 2>&1
+EOF
+msg_ok "Set up Cron"
+
+msg_info "Enabling Services"
+systemctl enable -q --now php8.4-fpm nginx supervisor
+msg_ok "Enabled Services"
+
+motd_ssh
+customize
+cleanup_lxc