Average Terms of Service Update Email Benchmarks
Terms of service (ToS) update emails notify customers of changes to legal agreements, policies or contract terms. They are compliance-driven communications that must inform clearly and, in many cases, secure acknowledgement or consent to continue using the service.
Average open rates range from 35% to 50%, driven by the expectation that legal changes matter. Click-through rates fall between 5% and 10%, with clicks going to the full terms, a summary of changes or an acknowledgement action. The real measure of success is comprehension and compliance: subscribers who understand the change, and who acknowledge it when required.
Key Findings
- ToS update emails achieve open rates of 35-50%, higher than most marketing email.
- CTR of 5-10% focuses on the change summary and acknowledgement link.
- A plain-language summary of changes outperforms a link to dense legal text.
- When acknowledgement is required, a single "I agree" CTA lifts completion rates by 20-35%.
- Sending a summary email plus a separate acknowledgement prompt improves compliance.
Open Rate Benchmarks
Open rates range from 35% to 50%, with the highest for updates that materially affect users — pricing, data use or account changes. Subject lines that state the change plainly ("Updates to our terms — effective [date]") outperform vague "we've updated our policy" lines. Subscribers open ToS emails out of caution, so transparency in the subject line drives both opens and trust.
Click-Through Rate Benchmarks
Click-through rates range from 5% to 10%. Emails that lead with a short, plain-language summary of the key changes and then link to the full terms perform 25-40% better than emails linking directly to dense legal documents. When acknowledgement is required, a dedicated "I agree to the new terms" button converts 20-35% better than a generic link. Segmenting by whether acknowledgement is needed improves the experience for both groups.
Best Practices
- Lead with a plain-language summary of what changed and why.
- State the effective date clearly in the subject line and first line.
- Link to the full terms and the change summary separately.
- Use a single acknowledgement CTA when consent is required.
- Give notice well in advance of the effective date.
- Keep records of who acknowledged and when for compliance.
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Frequently Asked Questions
Yes. Mixing legal changes into promotional email buries the notification and risks non-compliance. A dedicated, clearly-labelled communication ensures the change is seen and acknowledged where required.
Give as much notice as your jurisdiction and contract require — commonly 30 days for material changes. More time reduces friction and gives customers space to review.
Generally no, because they are expected and engaged with. Their high open rates and low complaint rates make them a positive signal — provided they are sent to a list that actually has a relationship with you.