Enter SLA Inputs
Target response and resolution fields help document contractual thresholds for the report, while compliance fields capture the actual incident counts that met them.
Example SLA Data Table
Use this sample to validate your reporting logic or train teams on monthly SLA reviews.
| Period | Target Availability | Actual Availability | Incidents | Response Met | Resolution Met | Estimated Credit |
|---|---|---|---|---|---|---|
| January 2026 | 99.90% | 99.95% | 9 | 9 | 9 | $0.00 |
| February 2026 | 99.90% | 99.84% | 12 | 11 | 10 | $250.00 |
| March 2026 | 99.90% | 99.22% | 17 | 13 | 12 | $625.00 |
Formula Used
These calculations reflect common SLA reporting logic for uptime, compliance, recovery, and estimated service credits.
Net Service Minutes = Total Period Minutes − Planned Maintenance Minutes
Availability (%) = ((Net Service Minutes − Unplanned Downtime) ÷ Net Service Minutes) × 100
Allowed Downtime = Net Service Minutes × (1 − Target Availability ÷ 100)
Response Compliance (%) = (Incidents Meeting Response SLA ÷ Total Incidents) × 100
Resolution Compliance (%) = (Incidents Meeting Resolution SLA ÷ Total Incidents) × 100
MTTR = Total Restore Minutes ÷ Total Incidents
Composite SLA Score = Weighted average of normalized availability, response compliance, and resolution compliance
Estimated Service Credit = Monthly Service Fee × Credit Rate
Credit tiers in this calculator are illustrative. Replace them with your contract’s exact credit schedule before operational use.
How to Use This Calculator
- Enter the reporting month or billing period label.
- Provide the total period minutes covered by the agreement.
- Subtract planned maintenance by entering those excluded minutes.
- Enter actual unplanned downtime and total incident count.
- Record how many incidents met response and resolution commitments.
- Add total restore minutes to estimate mean time to recovery.
- Set contractual targets, service fee, and any score weights.
- Submit the form to display results above the calculator.
- Export the calculated summary as CSV or print the page as PDF.
Frequently Asked Questions
1. What does this SLA calculator measure?
It measures uptime performance, downtime tolerance, response compliance, resolution compliance, recovery efficiency, weighted SLA score, and estimated service credits for a reporting period.
2. Why are planned maintenance minutes excluded?
Many agreements exclude approved maintenance windows from availability calculations. Removing them prevents scheduled service work from being counted as a contractual outage.
3. What is downtime headroom?
Downtime headroom is the remaining downtime allowance before the availability target is breached. Negative headroom means the agreement’s downtime threshold was exceeded.
4. How is MTTR useful in SLA reviews?
MTTR shows the average time required to restore service after incidents. Teams use it to judge operational recovery strength and prioritize process improvements.
5. Can this calculator replace my legal contract terms?
No. It is an analytical aid. Actual enforceable service credits, exclusions, grace periods, and escalation clauses must come from the signed agreement.
6. Why does the composite SLA score use weights?
Weights let you emphasize the metrics that matter most. Some teams value availability most, while others weigh response and resolution performance more heavily.
7. What if there were zero incidents?
The calculator treats response and resolution compliance as fully met when incident count is zero, because no ticket-based obligation existed during that period.
8. Can I adjust the service credit logic?
Yes. Edit the credit-tier section in the file to align thresholds and percentages with your own customer commitments and remedy schedule.