Outsourcing vs. In-House: Calculating TCO
Total cost of ownership comparisons for security operations are often built on incomplete spreadsheets. This guide covers the line items most often missed, the multipliers that change the answer, and a structured framework you can take into your next budget conversation.
- The line items most TCO spreadsheets miss
- How to size labor cost honestly (it’s higher than you think)
- The risk-adjusted cost of slower detection and response
- Hidden costs of tooling proliferation
- A complete framework you can use this week
What everyone counts.
Tooling licenses. SIEM platform fees. EDR licenses. Cloud security tooling. The fully-loaded compensation cost of the security team — salary, benefits, taxes. The training budget. These are the line items every TCO spreadsheet includes. They’re also the line items where the in-house number frequently looks cheaper than the managed number — until you add the missing rows.
What most spreadsheets miss.
Recruiting cost for the inevitable turnover. The ramp time of new hires (typically 6-12 months before they’re net-productive). The management overhead of a 24/7 operation. The opportunity cost of the security leader who is now spending 40% of their time on staffing instead of strategy. The risk-adjusted cost of slower detection and response during coverage gaps. The platform-license-renewal multiplier when the vendor knows you can’t walk away. These line items add up to a substantial fraction of the total, and they live below the line in most spreadsheets.
TCO over a multi-year horizon.
Three-year TCO is the right horizon for security operations comparisons. It captures recruiting and ramp cost on the in-house side, tooling renewal multipliers, and the maturity curve. Comparing year-one-only numbers consistently understates the cost of building in-house and overstates the cost of managed services.
We’ll do the math with you.
Digital Hands’ advisory team will work through a structured TCO comparison for your environment as part of a Security Posture Assessment. You see the math; we don’t hide the line items.