If you've ever pitched IT to a small business owner, you've heard the line: "Why pay for antivirus when free works fine?" The answer is in the numbers — but you have to know which numbers to look at.
Detection rates that matter
Consumer-grade free antivirus catches roughly 70-85% of known commodity malware. That sounds high until you remember the modern attack surface: phishing kits delivered through Microsoft 365, credential stuffing against SaaS apps, and supply-chain payloads that arrive through legitimate software updates.
For a small business, the malware that matters isn't the obvious stuff your free scanner flags. It's the quiet stuff that sits on an endpoint for weeks before exfiltrating data or pivoting to your file shares.
Dwell time is the real cost
Industry reports put median dwell time — the period between initial compromise and detection — at 11 to 24 days for SMBs running consumer-grade tools. With managed EDR (endpoint detection and response), it drops to under 24 hours.
Multiply that by the cost of a breach: median ransomware payout for SMBs in 2025 was $187,000, and that's before legal, downtime, and reputation damage.
What we deploy instead
For clients on our managed IT plans, we standardize on enterprise EDR with:
- Behavioral detection (catches novel attacks free AV misses)
- Centralized management (one console, all endpoints)
- 24/7 SOC monitoring (humans review the alerts that matter)
- Documented rollback (one click to restore from a malicious payload)
Cost? About $4-8 per endpoint per month, bundled into the flat-rate engagement. Less than your team's coffee budget. Way less than the breach.
The honest tradeoff
Free antivirus is fine for a personal laptop. It's malpractice on a business endpoint that touches customer data, payment systems, or regulated information. If you're running a small operation and "free" feels like the right answer, run the math on what one breach would cost you. Then call us.