NEW 21-day free trial · onboard your first project in a day · cancel anytime Start free

What Is a Subcontractor Portal in Construction Software?

What is a sub portal, and what can a subcontractor do in one?

A sub portal is the subcontractor-facing surface where a sub receives assignments, uploads daily logs, submits invoices, and signs lien releases, scoped to only the projects they are assigned to.

Start free

What it is

A subcontractor portal is the part of a construction platform a sub logs into to do their part of the job: see the work they are assigned, see their schedule, upload field documentation, submit invoices for completed work, and sign the lien releases that gate their payment. It is scoped to the sub's own assignments, so the sub sees their projects and nothing belonging to the GC's other jobs or other subs.

Why it matters

A sub portal closes the loop between the GC and the trades without email and paper. The sub sees exactly what they are responsible for, the GC gets documentation and invoices in one place, and the lien-release and compliance steps that gate payment happen in the same surface as the work. Done right, it also enforces isolation: a sub can never glimpse another sub's information or another project's margin, which is essential when many companies share one platform.

How it works

  1. Receive the assignment
    The sub sees the project and work they have been scheduled onto, scoped to their own assignments.
  2. Document the work
    Upload daily logs and field documentation for the work the sub performs.
  3. Submit the invoice
    Bill for completed work through the portal so it lands against the right project and commitment.
  4. Sign the lien release
    Complete the lien-release and compliance steps in the portal that gate the sub's payment.

Common mistakes

Try
Giving subs more visibility than their assignments
Reality
A sub portal has to be scoped to the sub's own projects. Any leakage into other jobs or other subs breaks the isolation guests depend on.
Try
Handling invoices and waivers off-platform
Reality
If payment paperwork lives in email, the steps that gate payment drift from the work record. They belong in the portal.
Try
Letting raw edits bypass the ownership chain
Reality
A sub's contact and compliance records have no built-in project field; edits have to go through paths that prove the ownership chain, not raw writes.
Try
Keying portal access to a person, not the company
Reality
Access should follow the sub company's project membership. Keying it to one individual breaks when the sub's people change.

How Scaftra handles it

Scaftra ships a commitment-scoped sub portal in production. A sub gets there through their Subcontractor Project Assignment, the membership created when the GC schedules them, so access follows the company's project membership and stays scoped to assigned work. Sub-side contact and compliance records, which have no built-in project field, are written through backend paths that prove the ownership chain rather than raw edits, preserving tenant isolation across every sub and GC sharing the platform.

Scaftra scopes the sub portal to the sub's own assignments, so a sub works their projects through one surface and can never glimpse another sub's work or another job's numbers.

Frequently asked questions

What can a subcontractor do in a sub portal?
Receive and see their assignments and schedule, upload daily logs and field documentation, submit invoices for completed work, and sign the lien releases that gate their payment.
How is a sub portal kept isolated?
Access follows the sub company's project membership, so the portal is scoped to the sub's assigned projects. A sub can never see another sub's information or another job's financials.
Does Scaftra have a sub portal?
Yes. Scaftra ships a commitment-scoped sub portal in production, reached through the sub's project assignment, with sub-side records written through ownership-proving backend paths.

One job. One record. From the field to the books.

Bring one project onto Scaftra. We'll set up your trades, your rooms, your proof chain, and your vendor portal, and connect it to the financial system you already run.