The verdict in three sentences
A dealership running vehicle inventory, service and parts on 3 separate systems knows neither its true cost per unit nor its service profitability. A unified dealership management system built around your real processes, including landed cost on imported and auction units, costs $100,000 to $180,000 as a 2026 order of magnitude, against $1,500 to $4,000 a month for each OEM-mandated DMS. The right choice depends on how many brands you carry and how much of your used inventory comes from outside franchise channels.
Three systems, no single view
The general manager of an independent multi-brand dealer group in Miami, with a main store in Doral and a used-car lot in Hialeah, sells 1,400 vehicles a year, new and used, and runs a 30-bay service department. Inventory lives in a spreadsheet, service in a shop management tool, parts in a separate inventory system. Reconditioning, auction fees, transport and, for export units shipped to Latin America and the Caribbean, port and documentation costs are added by hand, often after the sale. Salespeople negotiate without knowing real gross, and the service desk does not know whether a part is on the shelf before opening the repair order.
| Problem | Measured impact | Unified DMS response |
|---|---|---|
| Incomplete unit cost | Used gross overstated by 4 to 6 points | Vehicle record with auction, transport, recon, port fees |
| Inventory in a spreadsheet | 25 to 40 units aged over 90 days | Aging alerts, turn tracking |
| Service not linked to parts | 12% of repair orders waiting on parts | Part reservation when the RO opens |
| Labor efficiency not tracked | Unknown shop productivity | Hours sold vs hours clocked per technician |
| Fleet accounts on email | Missed services, lost contracts | Service schedule per fleet, reminders |
| Three customer databases | Duplicates, no follow-up | Single customer record |
Scope of a dealership system in Florida
Five modules. Vehicle inventory tracks each new and used unit by VIN with the full cost chain. Sales handles deals, trade-ins, F&I products and deliveries, with Florida title and registration paperwork. Service opens repair orders, schedules the 30 bays, clocks technician time and bills labor and parts. Parts manages part numbers, bins, purchase orders and minimum stock. Fleet follows business customers' vehicles, maintenance contracts and mileage. Invoicing applies the 6% Florida sales tax plus the Miami-Dade discretionary surtax.
| 2026 option (order of magnitude) | Cost | Strengths | Limits |
|---|---|---|---|
| OEM-mandated DMS | $1,500 to $4,000 per month | Direct brand integration | One franchise logic, weak on auction and export costs |
| Current separate tools | $15,000 to $30,000 per year | Already in place | No consolidated view |
| Shop management tool only | $3,000 to $8,000 per year | Simple | No vehicle inventory, no fleets |
| Custom unified DMS | $100,000 to $180,000 | Multi-brand, landed cost, fleets | 6 months, demanding scoping |
| Custom maintenance | 15 to 20% per year | Tracked evolutions | Budget ahead |
| Data migration | Included in project | 3 databases merged | Duplicate cleanup needed |
For a 3-brand group, two OEM DMS seats at $2,500 a month already mean $60,000 a year, without covering auction and export units. A custom build pays back on that line alone within 2 to 3 years, provided you keep the OEM access required for warranty claims.
Decisive scoping points
Trace the real cost chain of 20 recent units, from purchase to delivery: it is the basis of the landed-cost calculation. Define trade-in valuation rules. Clean active part numbers before migration. Set permissions: a salesperson sees gross, not necessarily acquisition cost. Typical 6-month plan: 1 month of scoping, 3 months for inventory, sales and service, 1 month for parts and fleets, then 1 month of go-live with a week of double entry.
Mini case study
Carlos, general manager of a dealer group in Miami, runs the numbers. On 700 used units a year at $2,400 average gross, a 5-point overstatement from missing costs is about $120 per unit, $84,000 a year in discounts given on gross that did not exist. Recovering half with full landed cost brings $42,000. In service, 12% of 9,000 annual repair orders wait 2 days for parts: freeing 300 bay-days a year at $180 gross per bay-day adds $54,000. With $60,000 of OEM fees partly retained, the $96,000 annual gain covers a $140,000 build in about 18 months.
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FAQ
What does a custom dealership DMS cost in Miami in 2026?
As a 2026 order of magnitude, $100,000 to $180,000 for unified inventory, sales, service, parts and fleets. Maintenance then runs at 15 to 20% of the build a year.
Do we have to drop the OEM DMS?
Not always: warranty claims and genuine parts orders often go through the manufacturer's tools. The unified system exchanges data with it by export or API, keeping one entry point for 80 to 90% of operations.
How is landed cost calculated?
Each unit carries its real costs: auction fee, transport, reconditioning, and for export units port and documentation fees. Shared container costs are allocated by key, for example pro rata to value, giving a unit cost accurate to about 1%.
Is a fleet module worth it for a dealer?
Yes for dealers servicing business, rental or municipal fleets: mileage-based schedules and automatic reminders protect contracts that often represent 20 to 30% of service revenue.
How long is the rollout?
Six months for a group of this size with two sites. A first release for inventory and landed cost can go live in 3 months.
Let's scope your project. We scope vehicle inventory, landed cost, service, parts and fleets with you, delivered in releases across both sites. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
