Email List Growth Rate Calculator

Enter your subscriber numbers and instantly calculate your email list growth rate — with AU benchmarks to see how you compare.

Calculate Your List Growth Rate

Total subscribers at the start of the period
Subscribers who joined during this period
Subscribers who opted out during this period

AU Email List Growth Rate Benchmarks

Shrinking Slow Healthy (2–5%) Strong Exceptional
Negative growth Below 0%
Slow growth 0% – 2%
Healthy growth (AU benchmark) 2% – 5%
Strong growth 5% – 10%
Exceptional growth Above 10%

Benchmarks are indicative for Australian SMBs. Industry, list size, and growth stage all affect what's healthy for your business.

Get AU Email List Benchmarks by Industry Emailed to You

We'll send you a breakdown of email list growth rates across key Australian industries — so you know exactly how your list compares to businesses like yours.

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What Is Email List Growth Rate?

Your email list growth rate measures how quickly your subscriber base is expanding (or shrinking) over a given period. It's one of the most important health metrics for any email marketing program.

Growth Rate (%) = ((New Subscribers − Unsubscribes) ÷ Starting Subscribers) × 100

For example: if you started the month with 1,000 subscribers, gained 80 new ones, and lost 20 to unsubscribes, your net growth is 60 — giving you a growth rate of 6%.

Why it matters for Australian businesses: A healthy email list compounds over time. Even a modest 2–3% monthly growth rate means your list roughly doubles every 2–3 years — without any ad spend. For service businesses in Australia, your email list is often the most cost-effective marketing channel you own.

Watch for negative growth. If unsubscribes consistently outpace new signups, it usually signals a relevance problem: your content isn't landing with your audience, your acquisition source is poorly targeted, or your send frequency is too high. Catching this early — with a metric like growth rate — lets you fix it before it compounds.

Monthly is the right cadence. Tracking growth rate monthly gives you a clear signal without the noise of weekly fluctuations. Compare month-over-month to spot trends, and compare against the AU benchmark range of 2–5% to understand where you sit.

How to Improve Your List Growth Rate