What’s Included in Fully Managed IT vs Co-Managed IT for Professional Services Firms?
Short Answer: The Difference Comes Down to Responsibility
For professional services firms, the difference between fully managed IT and co-managed IT is who owns the outcome.
- Fully managed IT typically costs $200–$275 per user per month and places 100% responsibility for systems, security, and performance on the MSP.
- Co-managed IT usually costs $75–$150 per user per month, but requires internal IT staff and shared accountability.
For firms with 25–80 employees, fully managed IT reduces operational risk and leadership burden, while co-managed IT lowers upfront costs but increases coordination, oversight, and internal workload.
Fully Managed IT: What the MSP Owns
In a fully managed IT model, the MSP takes complete responsibility for your environment, including:
- End-user help desk and support
- Network, server, and cloud infrastructure
- Microsoft 365 management and security
- Cybersecurity tools (endpoint protection, email security, MFA, patching, zero trust)
- Backup, disaster recovery, and testing
- Vendor management and escalation
There is no ambiguity about ownership.
If something breaks, slows down, or becomes a security risk — it’s the MSP’s responsibility to fix it.
This model works best for firms that want predictable costs and minimal internal IT management.
Co-Managed IT: What You Still Own
With co-managed IT, responsibility is shared between your internal team and an MSP.
Typically:
- Internal IT handles day-to-day issues
- The MSP supports security, projects, or escalations
- Strategy and accountability are split
While this model can reduce monthly fees, it often introduces:
- More meetings and coordination
- Slower response during incidents
- Confusion over who owns what
- Greater risk during staff turnover
A simple rule applies:
If no one internally owns IT strategy and accountability, co-managed IT breaks down quickly.
Cost Comparison: Monthly Fees vs Total Cost
At first glance, co-managed IT looks cheaper. But the full picture matters.
Fully managed IT
- $200–$275 per user per month
- No internal IT salary required
- Predictable monthly spend
Co-managed IT
- $75–$150 per user per month
- Plus internal IT salary ($70,000–$100,000+ annually)
- Additional costs for benefits, training, and turnover
For many firms, co-managed IT ends up costing more over time once internal staffing and risk are factored in.
Risk and Accountability Differences
The biggest difference between the two models isn’t cost — it’s risk.
With fully managed IT:
- One accountable party
- Faster incident response
- Clear ownership during security events
- Less leadership involvement
With co-managed IT:
- Shared responsibility
- Slower escalation
- Finger-pointing during outages
- Greater leadership involvement during problems
Professional services firms that rely on uptime and client trust often prefer the clarity of full accountability.
Which Model Fits a 25–80 Employee Professional Services Firm?
Fully managed IT is usually best if:
- You don’t have a dedicated IT leader
- Client data security is critical
- You want predictable costs
- Leadership doesn’t want to manage vendors
Co-managed IT can work if:
- You have strong internal IT leadership
- Responsibilities are clearly defined
- You’re comfortable managing multiple vendors
For most firms in this size range, fully managed IT provides fewer surprises and better long-term stability.
Client Example
A 55-employee professional services firm using a co-managed IT model with an internal IT manager.
Within 6 months of switching to fully managed IT:
- Internal IT workload dropped by 40+ hours per month
- Security response times improved significantly
- Vendor coordination issues were eliminated
- IT costs became predictable with fewer escalations
Leadership gained time back while reducing operational risk.
Final Thought
The choice between fully managed and co-managed IT isn’t about control — it’s about accountability.
If your firm wants IT handled without constant oversight, fully managed IT is usually the better fit. If you want shared responsibility and have the internal resources to support it, co-managed IT can work — with clear expectations