List Growth Rate
List growth rate is the speed at which your email subscriber list is growing, accounting for new subscribers, unsubscribes, and bounces.
What Is List Growth Rate?
List growth rate is calculated as ((new subscribers - unsubscribes - bounces) ÷ total list size) × 100 over a given period. A positive growth rate means your list is expanding; a negative rate means you're losing subscribers faster than you're gaining them. Healthy newsletter lists grow at 2-5% per month. Growth rate is more meaningful than raw subscriber count because it accounts for churn. A list of 10,000 growing at 5% monthly is in a much better position than a list of 50,000 growing at -1% monthly.
Why It Matters for Newsletters
Sustainable list growth is the foundation of a successful newsletter. Understanding your growth rate helps you balance acquisition efforts with retention strategies. If your growth rate is declining, it's an early warning that either your acquisition channels are drying up, your content isn't retaining subscribers, or both.
Best Practices
- Track net growth (new subscribers minus losses) rather than just new signups
- Identify your highest-quality acquisition channels by tracking which sources produce the most engaged subscribers
- Set monthly growth targets and review them regularly
- Balance growth with engagement — rapid growth from low-quality sources can hurt overall list health
- Combine organic growth strategies (content, SEO, social) with cross-promotion
How Aldus Handles This
Aldus's audience dashboard tracks subscriber growth over time, showing new subscribers, unsubscribes, and net growth. The platform's analytics help you identify which acquisition channels bring the most engaged readers.