A monthly uptime report is the cheapest client-retention tool an agency has. It takes minutes to produce with the right monitoring in place, and it answers the question every client silently asks: what am I paying you for when nothing is broken? Here's a structure you can copy, section by section.
The template
1. Headline summary (three lines max). Uptime percentage for the month, number of incidents, total downtime. If it was a clean month, say so plainly: "99.98% uptime, one brief incident, 4 minutes of downtime."
2. Uptime by site. A simple table: site, uptime percentage, incidents, total downtime. Clients with multiple sites should see them all in one place.
3. Incident log. For each incident: date, start time, duration, cause in plain language, and what was done. Keep jargon out; "the hosting provider had a network issue" beats "BGP flap upstream."
4. Response times. Average and worst-case load time, and whether the trend is improving or degrading. This is where you catch slow decay before it becomes a complaint.
5. Certificates and domains. SSL expiry dates and domain renewal dates coming up in the next 90 days, with a note on which ones you're handling.
6. What we did this month. Updates applied, backups verified, issues fixed before they became outages. This section is the quiet argument for your retainer.
7. Recommendations (optional). One or two items max. A report that always asks for money reads as a sales letter; one that occasionally flags a real risk reads as stewardship.
Three rules that make reports land
Send it even when nothing happened. A boring report is the product. Months of "everything stayed up" build the trust that survives the month something breaks.
Use real numbers, not vibes. "99.95% uptime" is verifiable and comparable month to month. If a client ever questions the value of the retainer, translate downtime prevented into dollars with our downtime cost calculator.
Automate the data, personalize the commentary. The uptime numbers, incident timelines, and response-time charts should come straight from your monitoring tool. Your judgment about what they mean is the part worth writing by hand. If an incident did happen this month, link the report to the emails you sent at the time (see our client-down email templates) so the narrative is consistent.
Sentinel's Business plan generates branded PDF reports with these numbers automatically, but the structure above works no matter what tooling you use.