Most building owners sign a service contract with their BAS vendor at the time of installation and then renew it every year without much analysis. That contract feels like the responsible choice: it covers the system, keeps the manufacturer involved, and ensures you have someone to call when something breaks. What it actually does, in most cases, is lock you into a cost structure that compounds over time in ways that are not obvious until you sit down and run the numbers.
The Obvious Cost: The Service Contract Itself
Proprietary BAS service contracts typically run $15,000-$25,000 per year for a mid-sized commercial building, depending on the system size and what the contract covers. There is usually no competitive bidding because no other contractor can legally access or service the proprietary software. The vendor sets the price, and you pay it or lose your warranty coverage and support access.
For context, an equivalent level of service on an open-platform system like Niagara N4 can typically be obtained from any qualified integrator at competitive market rates. The presence of multiple qualified contractors bidding on the same work consistently drives prices down 20-30% compared to single-vendor arrangements.
Over ten years, a $20,000 annual service contract represents $200,000 in service costs alone, with no price competition and typically annual rate increases of 3-5%.
The Hidden Costs That Most People Do Not Calculate
The service contract is the line item you can see. The hidden costs are harder to track because they are embedded in individual transactions.
Replacement parts at premium pricing. When a component on a proprietary system fails, there is often only one source for the replacement: the original manufacturer or their authorized distributor. Without market competition, markup rates of 30-50% above commodity part pricing are common. A temperature sensor that costs $45 from an open-market supplier costs $65-$80 through a proprietary vendor's parts program. Multiply that across years of normal parts replacement, and the premium becomes significant.
Software license renewals. Many proprietary BAS platforms charge annual software license fees of $2,000-$5,000 per year just to maintain access to your front end. These fees are often buried in the service contract or billed separately in a way that makes them easy to overlook as a recurring cost.
Vendor call charges for every change. Any modification to the system, adding a new piece of equipment, adjusting a control sequence, adding a user account, changing an alarm setpoint, requires calling the vendor's service department. At rates of $150-$250 per hour with typical minimum charges of two hours per call, routine system modifications cost $300-$500 each. Facilities that need frequent changes pay this cost repeatedly throughout the year.
No competitive bidding for expansions. When you add square footage, renovate a floor, or install new mechanical equipment, the expansion of your BAS has to go back to the original vendor. You cannot get competitive bids because competitors cannot access the system. The vendor quotes what they choose to quote, and the work goes to them.
Your data held hostage. This is the hidden cost that surprises people most. Your trending data, your alarm histories, your graphics, your sequences of operations: in a proprietary system, these are stored in a format that only the vendor's software can read. If you decide to switch platforms, you lose access to years of historical data unless the vendor provides an export, which they may or may not offer, at a price they determine.
Running the 10-Year Math
Take a building with a $20,000 annual service contract, $4,000 in annual software license fees, $3,000 per year in parts premiums, and an average of 10 vendor service calls per year at $400 each:
- Service contract over 10 years (with 4% annual increases): approximately $240,000
- Software license fees over 10 years: approximately $50,000
- Parts premiums over 10 years: approximately $30,000
- Vendor service calls over 10 years: approximately $40,000
Total: approximately $360,000
An open-platform system with competitive service contracts, no proprietary license fees, and market-rate parts pricing would typically run $200,000-$220,000 over the same period for equivalent coverage. The difference is $140,000-$160,000 over ten years, or about 40-60% more in total cost of ownership.
These numbers vary depending on system size and vendor, but the directional conclusion is consistent: proprietary lock-in is expensive, and the cost compounds over time.
How Building Owners End Up in This Situation
The proprietary contract situation typically starts at the time of original construction or renovation. The mechanical contractor specifies a BAS system, and the bid is awarded to the lowest price. Proprietary systems can appear less expensive at the front end because the vendor recoups margin over the equipment's lifetime through service contracts and parts.
By the time the building owner realizes the long-term cost structure, the system is installed, the staff is trained on the proprietary interface, and switching feels disruptive and expensive. The vendor knows this and prices accordingly.
The Path Out: Migration, Not Replacement
The good news is that you do not have to rip out and replace your existing BAS to escape proprietary lock-in. Protocol gateways (which we detailed back in December) are the first step out of proprietary lock-in.
A protocol gateway sits between your existing proprietary controllers and a new open-platform supervisory system like Niagara N4. If your proprietary system communicates on BACnet, Modbus, or a handful of other common protocols (and most do, even if they do not advertise it), the gateway can translate that communication into a format that Niagara can read and manage.
In practical terms, this means you can install a Niagara front end that aggregates your existing proprietary field controllers, giving you an open-platform interface and open-platform data access without touching the field hardware. Your existing controllers keep running. Your sequences keep executing. But now a competitive market of Niagara integrators can service and modify the system, and your data is in an open format that you control.
From there, field-level hardware can be migrated to open-platform controllers gradually over time as equipment reaches end of life or as budget allows. Each replacement removes one more piece of proprietary hardware from the system.
The migration timeline varies by building size and budget, but most buildings can achieve meaningful relief from proprietary costs within 12-18 months of starting the migration process.
If you want to understand what your proprietary BAS is actually costing you and what a migration path might look like, we are glad to do an honest assessment.