In-House IT vs MSP Cost: The Real TCO Comparison

Why This Comparison Gets Done Wrong

When a small business starts seriously considering IT staffing, two numbers usually end up on a whiteboard: "IT salary" and "MSP monthly fee." Whichever one is lower wins. That's the wrong way to do it, and it's how companies end up regretting the decision 18 months in.

A fair TCO (total cost of ownership) comparison has to account for everything a working IT function actually requires: compensation, benefits, equipment, software tools, coverage gaps (PTO, sick days, after-hours), training, recruiting, and — the single largest hidden cost — what you can't deliver with a single generalist hire when you need specialized security, cloud, or compliance work.

This guide walks through a complete TCO model for both options, applied to three common small-business sizes, and identifies the specific scenarios where each path actually wins. No surprise — the answer is "it depends" — but after reading this, you'll know exactly what it depends on.

The True Cost of One Full-Time IT Hire

Let's start with the line item everyone knows: salary. In the Houston and Greater Houston market in 2026, a competent mid-level IT generalist — someone who can handle end-user support, basic networking, Microsoft 365 administration, and light security — earns $65,000 to $95,000 base. Senior systems/security hires start around $105,000 and can easily clear $140,000. Junior help desk hires range $45,000–$58,000 but can't work independently.

Salary is only the start. The fully-loaded cost of one FTE is 1.3x–1.4x base once you add everything in. Here's the full breakdown for a mid-level hire at an $80,000 base:

The Coverage Problem No TCO Model Shows

The salary math is the easy part. The harder part is what happens when that one person is unavailable. A single in-house IT hire covers about 1,850 actual working hours per year after PTO, holidays, sick days, and training — which is roughly 35 hours a week of coverage, during business hours only.

That leaves gaps:

• After-hours. Ransomware doesn't wait until Monday. If the server goes down at 7 p.m. on Friday, your one IT person is either off-duty, on-call for free (not sustainable), or billing overtime.
• Vacation and sick days. Two weeks a year minimum where there's no IT backstop. If anything breaks during their trip, the office is down until they get back.
• Depth of expertise. One generalist cannot be a security expert, a networking expert, a cloud architect, and a database admin at the same time. Specialized problems either take much longer to solve or require outside help.
• Turnover risk. Average IT tenure at SMBs is under 3 years. When your one IT person leaves, you lose all institutional knowledge — and face a 3-6 month gap while recruiting and onboarding a replacement.

The MSP Model: What You're Actually Buying

An MSP is not "outsourced cheap labor." A well-run managed service provider is a team — typically a help desk tier, a senior tech tier, a security specialist, a cloud/infrastructure specialist, and a vCIO — that amortizes its collective cost across dozens or hundreds of client businesses. You get access to the expertise of five specialists for the cost of less than one generalist.

Here's what that looks like in practice for a 25-user Houston small business at a mid-tier managed IT contract of $150/user/month:

Side-by-Side TCO: Three Common Scenarios

Scenario 1 — 15-User Professional Services Firm

A small accounting or law office in the Houston suburbs. Cloud-heavy (Microsoft 365, a cloud practice management app, cloud phone system). One on-prem file server. Regulated data (client financials, PII). No current IT staff.

• In-house IT hire (mid-level): $114,700/year loaded + $0 additional MSP = $114,700/year, with single-point-of-failure coverage.
• MSP mid-tier at $150/user: $27,000/year, with 24/7 monitoring, security specialist access, and redundant team coverage.
• Verdict: MSP wins by roughly $87,700/year with broader coverage. In-house IT makes no sense at this size.

Scenario 2 — 45-User Multi-Location Dental Group

Three dental offices, on-prem practice management (Dentrix or Eaglesoft), imaging servers, HIPAA compliance requirements. No current IT staff.

• In-house IT (one person): $114,700/year — and this one person cannot realistically cover three locations during clinical hours. You will still need outside help for security, compliance, and imaging-server work.
• MSP top tier at $185/user: $99,900/year. Includes HIPAA documentation, endpoint security, backup, and on-site visits. See our dental IT services for what's typically included at this tier.
• Co-managed (one in-house + MSP at $100/user): $114,700 + $54,000 = $168,700/year. More expensive but most robust.
• Verdict: MSP-only usually wins at this size. Co-managed only makes sense if you have software-specific needs a general MSP can't cover.

Scenario 3 — 90-User Professional Firm

A mid-size firm with specialized internal apps, multiple office locations, and growth plans. Already hitting the limits of what a small outside IT provider can do.

• In-house IT (two hires: senior + junior): $115K senior + $75K junior = $190,000 base → ~$270,000 loaded. Still no after-hours coverage without on-call rotation.
• MSP top tier at $175/user: $189,000/year.
• Co-managed (one internal senior + MSP at $100/user): $160,000 + $108,000 = $268,000/year — similar cost to full in-house but with 24/7 coverage, security specialist access, and redundancy.
• Verdict: Co-managed IT typically wins at this size. A single internal hire handles institutional knowledge and internal apps; the MSP handles everything else.

When In-House IT Actually Wins

We'll say what most MSPs won't: there are real scenarios where hiring internal IT is the right call, even at smaller sizes. The strongest cases:

1. You run business-critical custom or industry software that requires deep institutional knowledge — a proprietary ERP, a niche manufacturing system, an industry-specific EHR that needs daily hands-on work.
2. Your employees expect immediate in-person response and your culture doesn't tolerate "submit a ticket." Executive offices and trading floors fall into this category.
3. You already have a trusted person who knows the business, and losing them would be worse than any cost comparison suggests.
4. You need someone embedded in cross-functional projects — IT-adjacent operations work that requires daily involvement with other departments.
5. You're growing fast and the in-house role is partly about being the integration point for future IT staffing.

Even in these cases, most companies still contract an MSP for specialty work: security operations, backup/DR, compliance, after-hours coverage. The question isn't binary — it's how to allocate the work.

The Co-Managed IT Model

Co-managed IT deserves its own treatment because it's the answer for most mid-size businesses. The structure:

• One internal IT person (usually a senior generalist) handles day-to-day user issues, owns institutional knowledge, manages internal apps, and serves as the primary point of contact with vendors.
• The MSP provides 24/7 monitoring, patch management, security operations (EDR, SIEM, incident response), backup/DR, after-hours coverage, specialty project work, compliance artifacts, and a vCIO.
• Pricing is typically 50–70% of a full managed IT contract — somewhere in the $75–$125/user/month range for the MSP portion.

This model gets you 24/7 coverage, broad expertise, and institutional knowledge — at roughly the cost of a single in-house hire — without the gap that opens when one person takes vacation or quits.

Questions to Ask Before Deciding

Regardless of which direction you lean, these are the questions that clarify the decision:

• What is our coverage requirement — 40 hours a week, 60, 24/7?
• What regulated data do we handle, and who's documenting the controls?
• How long can we tolerate being without IT support (PTO, turnover, emergencies)?
• Do we have internal applications that truly require daily institutional knowledge?
• What is the real fully-loaded cost of the hire we'd make — not just the salary?
• What is the opportunity cost of management time spent supervising and reviewing IT?
• If we hire internally, who do we call for specialized security, cloud, or compliance work?