When you hire a cybersecurity provider, an ironclad SLA is what separates "we'll try our best" from "we're legally accountable." Without clear performance standards baked into your contract, you're gambling on incident response times, vulnerability remediation windows, and breach notification protocols that may or may not exist.
Why SLAs Matter in Cybersecurity
A cybersecurity SLA isn't just paperwork—it's your safety net when something goes wrong. Unlike generic IT support, cybersecurity is about preventing catastrophic losses. If your provider doesn't explicitly commit to detecting intrusions within 2 hours, responding within 4, or fixing critical vulnerabilities within 48 hours, you have no recourse if they fall short.
Most breaches cost organizations between $200,000 and $5 million. A vendor without measurable SLAs is betting you won't notice the difference between their slow response and a faster one. You will.
Key Metrics to Negotiate
Mean Time to Detect (MTTD)
This is how long it takes your vendor to identify a genuine security incident. Industry benchmarks range from 1 to 24 hours depending on threat severity. For critical threats (active data exfiltration, ransomware execution), push for 1–4 hours. Moderate threats (suspicious lateral movement) can tolerate 8–12 hours.
What to ask: Do they monitor 24/7, or only during business hours? If they subcontract monitoring, who's actually watching your systems at 2 a.m. on Sunday?
Mean Time to Respond (MTTR)
This is containment, not just detection. After identifying a breach, how fast do they isolate affected systems, disable compromised accounts, or block malicious IP ranges?
Aim for:
- Critical threats: 1–2 hours
- High-severity threats: 4 hours
- Medium-severity threats: 8–24 hours
Anything slower than 24 hours for high-severity issues is unacceptable unless you're paying for a budget-tier service.
Vulnerability Remediation Windows
Your provider should commit to patching critical vulnerabilities (CVSS 9.0+) within 48 hours, high-severity (CVSS 7.0–8.9) within 5 business days, and medium-severity within 30 days.
Reality check: Some vendors use "discovery date" as their starting point; others use "vendor patch release date." The difference is significant. Negotiate for the latter—it's more realistic and enforceable.
Breach Notification Timeline
Your vendor must notify you of a confirmed breach within 24–48 hours. Most regulations (HIPAA, GDPR, state breach laws) require notification to authorities and affected parties within 30–72 hours, so your vendor's notification deadline needs slack to investigate first.
Financial Penalties and Credits
Don't skip this section. An SLA with no teeth is just a promise.
Typical service credit structures include:
- 99.9% uptime SLA: 10% monthly credit if missed
- Detection time SLA: 5–15% monthly credit per hour over the agreed window
- Response time SLA: 10% monthly credit per hour over the agreed window
Negotiate for cumulative credits—if they miss detection and response windows, you should get stacked credits. Cap annual credits somewhere meaningful (usually 25–50% of monthly fees), or the vendor won't care.
A word of caution: Credits are compensation, not prevention. If a vendor constantly misses SLAs but offers credits, you're paying them to fail. Push for performance improvements or find someone more reliable.
Exclusions to Challenge
Vendors always include exclusions. Common ones:
- "Acts of God" (reasonable)
- "Your misconfiguration" (scrutinize this—who decides?)
- "Attacks exceeding X gigabits per second" (set a realistic cap, not 10 Gbps)
- "Third-party network outages" (if they're monitoring through an ISP, that's their responsibility, not yours)
Fight vague language like "circumstances beyond reasonable control." Define what that means in your contract, or remove it.
What Pricing Typically Looks Like
Managed security service providers (MSSPs) typically charge:
- Tier 1 (basic monitoring + alerts): $1,500–$3,500/month
- Tier 2 (24/7 SOC, incident response included): $5,000–$15,000/month
- Tier 3 (dedicated analyst, threat hunting, compliance reporting): $15,000+/month
Higher tiers include stricter SLAs. If you're paying for Tier 1 pricing, don't expect Tier 3 response times.
Frequently Asked Questions
Q: Can I negotiate SLAs if I'm a small business? Yes—even startups deserve explicit commitments. You may not get 1-hour response times, but 4–8 hour response for critical threats is fair regardless of company size.
Q: What happens if our vendor gets breached—does the SLA apply to us? No legitimate vendor will cover their own breach under your SLA. However, require them to notify you within 24 hours and carry cyber liability insurance ($5M+ typical for reputable providers).
Q: Should we require our vendor to maintain ISO 27001 or SOC 2 Type II? Both strengthen accountability, but SOC 2 Type II is more relevant to SLAs since it audits their actual response procedures and timelines over 6+ months.
Compare multiple cybersecurity providers side-by-side on Mercoly to see which ones publicly commit to SLAs that match your risk tolerance and budget.