The Residual Income Math MSPs Get Wrong
Key Takeaways
- Residual income erodes when client technology moves forward and your pricing stays the same.
- Three numbers trip up most MSPs: technology refresh depreciation, the hidden cost of legacy voice, and slow upsell velocity.
- A modern cloud communication stack protects margin instead of eating it.
- Axion gives MSPs a partner model built for recurring revenue that lasts.
Every MSP founder has run the math at some point. Monthly recurring revenue sounds like a dream sign a client, collect a check, repeat. The model is simple, but the reality is not.
Talk to any service provider who has been in the business for five or more years and most of them will tell you the same thing. The residual income model they imagined when they started looks nothing like the numbers they actually live with today. If you have ever been to MSP Expo or similar event and walked out of a session on recurring revenue wondering why your ARR still feels fragile this is for you. The problem is usually not your sales process. It is not even churn in the traditional sense. It is a math error that hides quietly in your communication stack and grows over time.
Why the Residual Model Breaks Down Over Time
The mode is basic. You invoice monthly, manage costs, and keep what’s left. What gets missed is what happens to that margin as the technology your clients use evolves while your pricing stays the same.
Here is a concrete example. Suppose you onboarded a 30 seat dental office three years ago. You bundled in a legacy phone system. Your contract locked in a monthly figure that made sense at the time.
Today, that same client wants to know why their phones do not integrate with their patient management software. They want their staff to take calls from home. They want a mobile app. You are either absorbing upgrade costs out of your margin or you are risking churn.
This plays out across healthcare, real estate, education, and veterinary practices every day. The vertical does not matter, but the math error does.
Quick Tip
Pull your three oldest managed accounts and calculate the actual hours touched on their phone system in the last 12 months. Compare that to what you modeled when you signed them. That gap is costing you more than you think.
The Three Numbers Most MSPs Get Wrong
There are three specific places where the residual income math breaks. Each one is fixable. Most MSPs never look at any of them.
1. Technology Refresh Depreciation
Most MSPs set their margin at the start of a contract and assume it stays the same, even though the tools they rely on don’t last forever.If you are not building a depreciation line into your per seat cost accounting for hardware upgrades, cloud migrations, and end user retraining you are spending future margin today without realizing it.The fix is simple in principle. You need to add a technology refresh reserve before you sign. Even at $3, 5 per seat per month built up over time dramatically changes what your real five year margin looks like.
2. The Hidden Cost of Legacy Voice Infrastructure
This is where the math gets brutal. Legacy on prem PBX systems require physical maintenance, firmware updates, and hardware replacements. They eat margin on a schedule you cannot predict. Modern VoIP softphone solutions built on cloud infrastructure work differently. When something breaks, the provider fixes it. When a client needs a new feature, it rolls out automatically no truck roll required.If your current stack requires your team to touch the phone system more than twice a year per client, you are losing 10, 15% of your margin on that account to invisible labor. That is not a pricing problem. That is a platform problem.
3. Upsell Velocity or the lack of it
Residual income only stays healthy if revenue per client grows over time. That growth comes from two places: Price increases and Product expansion.
Most MSPs are uncomfortable with price increases. That means product expansion carries the full weight of per client revenue growth.
But product expansion requires having products worth expanding into. If your communication stack is a commodity bundle, there is nothing natural to upsell. You will not have a conversation about AI powered call analytics if you are not offering it. You will not sell business SMS if the client does not know it exists inside the platform they already use.
See how Axion’s business phone system eliminates the overhead that drags MSP margins down no hardware, no truck rolls, no surprises.
See how Axion’s business phone system eliminates the overhead that drags MSP margins down no hardware, no truck rolls, no surprises.
What a Profitable MSP Communication Stack Looks Like in 2025
The good news is that the math is entirely fixable. It starts with choosing a communication partner built for the way MSPs operate not one that treats you like a direct end user.
Here is what the communication layer of profitable managed contract should include today :
Cloud based VoIP with a VOIP call applicationNo hardware erosion. No truck rolls. A proper VOIP call application lets clients make and take calls from any device desk phone, laptop, or mobile without adding complexity to your support queue.
Business SMSClients expect to text their vendors. If your bundle does not include a managed business SMS solution, a competitor will sell it to them and use it as a wedge into the account.
Team ChatInternal communication that lives inside the same platform as external communication reduces the tools clients manage. Team chat is a low effort, high stickiness add on that pays for itself in reduced churn.
AI AnalysisThis is the upsell most MSPs leave untouched. Clients want to understand their call data volume, performance, trends. Integrated AI analysis turns communication data into monthly reports that feel like consulting. That is a margin conversation, not a support conversation.
Meeting SolutionsRemote work did not go away. If clients are paying separately for a video tool, they are paying for something you could be providing. Meeting solutions bundled into your contract increase value with minimal cost.
Virtual Fax (vFAX)Healthcare, legal, financial services regulated verticals still fax. Offering vFAX inside your bundle eliminates a pain point clients are currently paying someone else to solve.
If you have spent time with us, you already know the conversations have shifted. AI, automation, platform consolidation are table stakes discussions now, not future state ideas. What you hear less often but what matters more to the long term health of your business is the conversation about how the platform choices you make today set your margin ceiling five years from now.
For IT service providers wide managing multi vertical client bases, the ability to deploy the same platform across a dental office, a tech startup, and a consumer services business with vertical specific configurations is what makes the economics work at scale.
How Axion Fits Into Your MSP Model
Communication infrastructure should be a margin driver for IT service providers, not a margin drain. The platform is unified. Your clients are not juggling five separate vendor for phone, chat, fax, SMS and video. Everything lives in one place, under one contract, with one support relationship. This consolidation directly reduces your support burden and increases client stickiness. Axion’s reports and analytics give your clients real visibility into their communication performance. When a client can see call trends, response times, and team activity inside a dashboard you are providing, that becomes a value conversation, not a price conversation. And with secure file transfer built into the same ecosystem, even document workflows get pulled int the managed service conversation.
The Bottom Line
As has been noted, the residual income model is not broken, but the version most MSPs are running is because it was built on assumptions that no longer hold.
Fixing it does not require a complete rebuild, but it does require being honest about where margin leaks. That’s in voice infrastructure, invisible labor, and flat pricing across verticals. Make one or two deliberate changes to the technology stack, and those leaks close permanently. The margin you recover does not just stabilize, it starts scaling.
AC
Axion Communications
All in one business communication for IT service providers, healthcare, real estate, and more.
Visit axioncommunications.com
RELATED RESOURCES FROM AXION
- →Business Phone System (VoIP)
- →AI Analysis for Communication
- →Business SMS Solution
- →Healthcare Communication
- →Meeting Solutions
- →Reports & Analytics
- →Virtual Fax (vFAX)
- →Team Chat
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