Subcontractor margin leaks in two specific places: work performed on a verbal change order and never billed, and progress invoices that go out late so your cash finances somebody else's project. Both are visible on site and invisible in the office.
Field service and construction. Compare existing field-service platforms against your actual jobs. Scope integrations, follow-up, reporting or a customer portal when a demonstrated handoff remains unresolved.
Sub-niches covered: Drywall and framing, Concrete and formwork, Glazing and curtain wall, Flooring and finishes, Masonry and stucco, Painting and coatings.
You likely have this problem if:
Verbal change orders get performed and never billed.
Progress billing is late because quantifying completion is manual.
Holdback is tracked in a spreadsheet nobody trusts.
Labour hours per project are known at payroll.
You have holdback that became releasable months ago.
What breaks operationally:
Change orders are agreed verbally on site and never make it to an invoice.
Progress billing is late because quantifying completion is a manual exercise.
Holdback and retention are tracked in a spreadsheet nobody trusts.
Labour hours per project are known at payroll rather than during the work.
What we build:
Field change-order capture. A change captured on site with a photo and a signature before the work is done, which is the entire difference between billed and absorbed.
Progress billing on schedule. Completion quantified from field reporting so invoices go out on the billing date rather than when somebody gets to it.
Holdback register. Retention tracked per project with release dates, so the money owed to you is a list rather than a surprise.
Live labour costing. Hours against budget per project during the job, not after payroll closes.
Why do verbal change orders never get billed?
Because the person who agreed to it is on site and the person who invoices is not, and there is no artefact connecting them. A photo and a signature captured in thirty seconds on site is the whole fix, and it typically pays for the system by itself.
How do you quantify progress for billing?
From field reporting against the schedule of values you already agreed. The barrier is rarely the method; it is that nobody collects the field numbers in time, which is a capture problem rather than an accounting one.
Is holdback tracking really a software problem?
It is a memory problem that software solves cheaply. Subcontractors routinely have holdback releasable months earlier than they claim it, simply because nobody was tracking the release date.
Should this integrate with the general contractor's system?
Where the GC provides access, yes for documents and RFIs. Your billing and costing should stay yours, because a subcontractor whose financial record lives inside the GC's platform has no position in a dispute.
Last reviewed 22 August 2026
CHOOSING YOUR SOFTWARE
An established product can be the right answer. VX-N scopes custom software, configuration and integrations around your requirements. Compare the workflow before deciding to replace anything.
Construction management software serving specialty contractors.
What to test before deciding. Demonstrate your own company workspace versus access provided by the general contractor.
A product gives you its supported platform, configuration options and vendor roadmap. A VX-N engagement defines the workflow, deliverables, data access and ongoing support for your business. Compare total operating cost, implementation effort and maintenance for the same scope.
Product sources checked 11 October 2026. Independent comparison by VX-N. No vendor partnership is implied. Features, plans, regions and integration access vary; confirm them with the vendor. VX-N scope, ownership, maintenance and support are agreed before a paid build.