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Commercial & Mechanical

Mechanical Contractor Software for Work That Gets Billed in Draws

Bids and submittals, a schedule of values that inherits from the accepted bid, monthly progress billing, change orders that re-baseline the contract, retainage, and a WIP schedule you can hand to a surety — alongside the service and replacement work that pays the bills between projects.

See It in Action
Mechanical contractor project management dashboard showing phased commercial HVAC job tracking

Commercial Mechanical Work Breaks Residential Software

Nearly every HVAC platform on the market is designed around a residential replacement: one homeowner, one system, one signature, one invoice, same day. That is a genuinely good business and we serve it too. But it is not the business you are running when you bid a rooftop changeout for a medical office, or the mechanical package on a new retail build.

 Residential replacementCommercial mechanical
The proposal isA sales documentA bid response to a spec or RFP
Decision takesOne appointmentWeeks, across several parties
You get paidOn completionMonthly draws against a schedule of values
WithheldNothing5–10% retainage until closeout
Margin is decided byClose rate and priceChange orders and cost control
Finance report that mattersRevenue and close rateWIP schedule and bonding capacity

Every row on the right is something a residential-first platform either cannot do or bolts on as a notes field. That is why mechanical contractors so often end up running the estimate in one system, the billing in a spreadsheet, and the WIP in a quarterly conversation with their CPA.

Built for the Contract Side of the Job

Bid to schedule of values

The accepted bid becomes the billing baseline instead of being retyped. Line items carry their scheduled value into the first pay application, so month one does not start with a spreadsheet.

Progress billing every month

Percentage complete per line, materials stored on site, retainage withheld, previous certificates deducted — the arithmetic of a standard pay application, produced from the job record.

Change orders that re-baseline

Price the change, capture the approval, add the line, and let the revised contract value flow into the next draw. Unbilled change-order work is the most common margin leak in mechanical work.

Job cost that supports a WIP

Labour, material, and change orders captured against the job as they happen, so the monthly work-in-progress schedule is a report you run rather than a reconstruction you attempt.

Build My Platform
Mechanical contractor bid and proposal builder with line-item pricing for a commercial HVAC package

One Bid, Priced Line by Line, Ready to Bill Against

Mechanical bids are built from equipment schedules, labour by phase, and subcontracted scope, and they get revised — sometimes several times — before anyone signs. The version that finally gets accepted is the one your billing has to match for the next eight months.

SubcontractorHub keeps the bid, the accepted version, and the billing baseline on the same job record. Build the schedule of values from the bid rather than from memory, and model the draw before you submit it with the free schedule of values calculator.

See the Platform
Phased commercial mechanical project tracking with milestones, costs, and change orders

Service and Construction on One Customer Record

Most mechanical contractors run two businesses. Service and replacement work is fast, priced from a flat-rate book, and closed on site. Construction work is bid, submitted, drawn, and retained. Keeping them in separate systems is how you end up sending a service tech to a building your own project team commissioned last year without knowing the history.

Both run on one platform here — fast-path quoting with EasyQuote for service and replacement, contract-path billing for construction, and the same customer, equipment, and job history behind both. See HVAC contractor software for the service side and project management for the construction side.

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SubcontractorHub fits mechanical contractors who:

The platform is built for contractors carrying both a service book and a project backlog, where the billing complexity has outgrown a spreadsheet.

Talk to the Team
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Bid commercial HVAC, piping, or plumbing scope to GCs, owners, or property managers

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Bill monthly against a schedule of values rather than invoicing on completion

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Have retainage outstanding on more than one job right now

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Lose margin to change-order work performed before it was approved

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Produce a WIP schedule for a surety, lender, or CPA

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Run service and replacement work alongside the project backlog

Common Questions

What is mechanical contractor software?

Mechanical contractor software manages the commercial side of HVAC, piping, and plumbing work — bid and spec management, submittals, multi-phase project tracking, progress billing against a schedule of values, change orders, and retainage. It differs from residential HVAC software in what it has to model: a job that runs months rather than a day, is billed in draws rather than invoiced once, and is sold to a general contractor or facility owner rather than a homeowner at the kitchen table.

How is mechanical contractor software different from residential HVAC software?

Residential HVAC software is built around a same-day close: one decision-maker, one system, one signature, one invoice. Mechanical work inverts nearly all of that. The proposal is a bid response to a spec or RFP, the decision takes weeks across facilities, finance, and ownership, the work is billed monthly against an approved line-item schedule of values with 5–10% retainage withheld, and change orders drive a large share of the final margin. Software that stops at the signature leaves the hardest part unmanaged.

Do mechanical contractors need progress billing?

Almost always. Commercial mechanical contracts are paid in progress draws rather than on completion, which means every month you produce a pay application showing percentage complete per line item, materials stored on site, retainage withheld, and previous certificates. If the accepted bid does not carry forward into that billing baseline, somebody rebuilds the schedule of values by hand each month — which is where billing errors, rejected applications, and payment delays come from.

How do mechanical contractors handle change orders?

Badly, in most cases, and it is expensive. The pattern is that field conditions change, the work gets done to keep the schedule, and the paperwork follows weeks later or never. The cost lands in job cost immediately while the contract value cannot rise until the change order is executed, so the job swings underbilled and the margin quietly disappears. The fix is procedural rather than technical: price the change, get it approved, and add the line before the crew starts.

Can SubcontractorHub handle both service and construction work?

Yes, and most mechanical contractors need both. Service and replacement work runs on the fast path — quote on site, present financing, collect a signature, schedule the install. Construction work runs on the contract path — bid, submittals, schedule of values, monthly draws, retainage, closeout. Running them in two disconnected systems means your service techs and your project managers cannot see the same customer, which is exactly where recurring service revenue on buildings you already built gets lost.

What should mechanical contractors look for in software?

Four things beyond a normal CRM: a proposal that survives revision and version comparison rather than one built for a same-day close; a schedule of values that inherits from the accepted bid instead of being retyped; change-order tracking that re-baselines the contract value and flows into billing; and job costing accurate enough to support a monthly WIP schedule, because that report drives your bonding capacity. If a platform cannot produce a defensible WIP, it is a service tool with a project tab.

How does mechanical contractor software affect bonding capacity?

Indirectly but significantly. Surety underwriters set bonding lines largely off the work-in-progress schedule, and a clean WIP requires costs captured against the job as they happen and cost forecasts genuinely revised each month. Contractors whose job cost data is reconstructed quarterly from invoices and memory produce WIP reports that look inconsistent, and inconsistency reads as risk. Better cost discipline usually buys more capacity than a single strong year of profit.

How long does implementation take for a mechanical contractor?

Plan on a few weeks rather than a few days, because there is more to configure than on a residential rollout: your cost code structure, standard schedule-of-values templates by job type, submittal and approval workflows, billing cycles, and retainage terms. The sequence that works is to configure it around one live job, run a real pay application through it, then roll it out across the portfolio once the billing output is trusted.

Ready to See It on a Real Job?

Book a demo and bring a live project. We will walk one bid through to a pay application so you can see exactly where the schedule of values, change orders, and retainage land.

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