How to Measure Email Marketing Performance for Accounting Firms | AccountingStack

The three metrics that matter most for an accounting firm's email marketing are open rate, click rate, and replies or enquiries generated. Everything else is secondary. Understanding what these numbers mean, what benchmarks are realistic, and how to use them to improve your next send is the complete performance measurement framework you need.

The metrics that matter

Open rate

Open rate is the percentage of delivered emails that were opened. It is the primary measure of subject line and sender reputation performance. A higher open rate means your subject lines are working and your audience trusts your name in their inbox.

Open rates across all industries average in the low-to-mid twenties as a percentage, but professional services newsletters to warm client lists typically perform above this. Accounting firm newsletters sent to existing clients with relevant subject lines should achieve open rates above the general average. Check your email tool's industry benchmarks for context — these change over time and vary by tool.

Click rate

Click rate is the percentage of delivered emails in which a recipient clicked at least one link. It measures content relevance and CTA effectiveness. A high open rate with a low click rate suggests subscribers are opening but not finding enough value to take action.

For accounting firm newsletters with one CTA, a click rate of two to five percent of delivered emails is a reasonable target. Emails with a single, highly relevant CTA (e.g. "Book your year-end planning call" in October) will outperform general content links.

Click-to-open rate (CTOR) — the percentage of openers who clicked — is a more useful quality metric than raw click rate. CTOR isolates content quality from subject line quality.

Replies and enquiries

The most meaningful metric for a professional services email list is how many people replied, booked a call, or asked a relevant question after a send. This is not tracked automatically in email tools — you need to monitor it manually.

After each newsletter send, note whether any replies or enquiries came in that reference the email. Over time, patterns emerge: specific topic types generate conversations; others generate no response at all. This is qualitative but highly actionable.

Unsubscribe rate

Unsubscribes after a send indicate that the content was irrelevant or the email was unexpected. A rate above one percent of sends per email is a signal to review subject line accuracy, list quality, or content relevance. A small number of unsubscribes after every send is normal and healthy — it means your list is self-cleaning.

List growth rate

Net new subscribers per month, minus unsubscribes. A growing list (even slowly) indicates your list-building tactics are working; a shrinking list indicates either high churn or no new acquisition.

What to review and when

After every send: note the open rate and click rate in a simple spreadsheet. You do not need a formal dashboard — a tab with date, subject line, open rate, click rate, and any notable replies is sufficient.

Monthly: compare this month's open rate to last month and last year's equivalent month. Look for trends rather than single-send fluctuations.

Quarterly: review which emails in the past quarter had the highest and lowest open rates. What did the top performers have in common? Subject line format, topic type, time of year? Apply that pattern going forward.

Annually: look at list growth over the year, average open and click rates, and total enquiries attributable to email. This is the input for your decision about whether to invest more in email, whether to try a new tool, or whether to change your content strategy.

Benchmarking against realistic targets

Do not compare your accounting firm newsletter to general email marketing benchmarks, which include ecommerce and B2C sends that behave very differently from professional services communications.

Compare against:

• Your own previous performance (is it trending up or down?)
• Professional services industry benchmarks in your email tool's analytics (Mailchimp, ActiveCampaign, and Kit all publish industry benchmark reports)
• The results from your best-performing sends to identify what is replicable

A practice with 300 engaged existing clients, a well-maintained list, and relevant subject lines should consistently outperform general benchmarks. If you are not, the issue is likely subject line quality, content relevance, or list quality.

The simplest improvement you can make

The highest-leverage improvement for most accounting firms is subject line testing. Most email tools on paid plans offer A/B testing — sending version A to 20% of the list and version B to another 20%, then sending the winner to the remaining 60%.

Even without formal A/B testing, rotating through subject line formula types (specific question, numbered list, deadline hook) and tracking which produces higher opens gives you actionable data within a few months of consistent sending.

Key takeaways

• The three metrics that matter most are open rate, click rate, and replies or enquiries generated from each send.
• Open rate accuracy is affected by Apple Mail Privacy Protection — use it as a relative trend measure, not an absolute figure.
• Click-to-open rate (CTOR) is a better measure of content quality than raw click rate.
• Review open and click rates after every send; review trends quarterly; do a full annual review.
• The most effective improvement for most practices is subject line A/B testing — available on paid email tool plans.

Frequently asked questions

What is a good open rate for an accounting firm newsletter?

Professional services newsletters to warm lists consistently outperform general email marketing averages. Your email tool's industry benchmarks are the most relevant reference point, as these vary by tool and change over time. A more useful target is your own historical average: are your last three months' open rates higher or lower than the previous three months?

How does Apple Mail Privacy Protection affect our measurements?

Apple Mail Privacy Protection pre-fetches email content including tracking pixels, which registers as an open even if the subscriber never viewed the email. Lists with a high proportion of iOS/Apple Mail users will show inflated open rates. Use your email tool's engagement analytics (clicks, replies) as a more reliable proxy for actual engagement.

Should we track email performance in a separate spreadsheet or is the email tool's dashboard enough?

For most practices, the email tool's native analytics are sufficient. A simple supplementary log (date, subject line, open rate, click rate, notable outcomes) helps spot trends that the tool's own reporting may not surface clearly, particularly for small lists where a single unusually high send can skew tool-generated averages.

How do we know if email marketing is generating new clients?

Ask new clients how they heard about you. Include this question in your onboarding process or initial meeting. If multiple clients in a year say "your newsletter" or "an email you sent", that is attributable revenue. Email attribution is often undercounted in formal analytics because a client may read your newsletter for six months before making an enquiry.

At what point should we invest more in email vs other channels?

Email becomes a clear investment priority when: your list has a consistent open rate above general benchmarks, you are generating enquiries from it, and you have not yet set up a welcome sequence or segmentation. These are the highest-return improvements and both can be implemented at low or no cost on existing email tools.

Read our guide on email subject lines to improve open rates, or return to the email marketing hub for the full library of guides.