Subcontractor Onboarding

Prequalification decides whether you work with a sub. Onboarding is everything between "approved" and "on site", and it is where most of the avoidable friction on a job gets created or prevented.

Done well it takes a week and never comes up again. Done badly it produces a sub who invoices in the wrong format, has never seen your lien waiver forms, and shows up at the gate without a certificate.

Who owns it: the project manager for that job. The contract administrator supplies the paperwork; the PM owns whether the sub is actually ready.

If the sub is not yet approved, start at the prequalification process.

Phase 1 — Contract execution

Nothing else in this workflow is worth doing until the subcontract exists.

Execute it before mobilization, not after. A sub working without a signed subcontract is working on your general conditions and their assumptions, and every dispute that follows starts from there.

The subcontract needs to carry, at minimum:

The scope, by specification section and drawing reference, with exclusions stated
The contract sum and how change orders get priced and approved
The schedule, including their milestone dates and manpower commitment
Payment terms, retainage, and the pay application cycle
The insurance requirements exhibit
Lien waiver forms as exhibits — the actual forms they will be signing
Safety requirements and the consequences of violating them
Any conditions carried over from a conditional approval — bonds, joint checks, funds control, increased retention

Use the subcontractor agreement generator as the base and keep your exhibits consistent across every sub on the job.

Watch out

Conditions from a conditional approval have to be written into the subcontract itself. An increased retention percentage that lives only in the approval letter will not survive the first time accounting cuts a check from the standard template.

Phase 2 — Documents

Collect these once, centrally, and file them where the next person can find them.

Document	What good looks like
W-9	Entity name matches the subcontract signature block and the name they will invoice under
Banking / ACH details	Received on their letterhead, from a known contact, and verified by phone
Certificates of insurance	Checked line by line against the exhibit, with endorsements
Contractor's license	Current, correct state, correct classification for the scope
License bond, where required	Current
Written safety program	An actual document, not a statement that they have one
Emergency contacts	Two people, with mobile numbers, available outside business hours
Key personnel	Named foreman, named project manager, named safety contact, named person for invoicing
Subcontract bond, if required	Received before mobilization, not promised

The banking fraud warning

Payment redirection fraud is the most common way construction companies lose money to fraud, and the mechanics are always the same. Someone emails from an address that looks like your sub's, says their banking details have changed, and attaches a form on convincing letterhead.

The rule, without exceptions:

Watch out

Any change to banking details — new account, new bank, new routing number — is verified by calling the sub back on a number you already had on file, not a number in the email, and speaking to a person you have dealt with before. Do this for the first setup and for every change afterwards, including the ones that look routine.

Two supporting controls worth having:

The person who changes banking details in your system is not the person who approves payments
A first payment to changed details is confirmed with the sub by phone after it is sent

Write both into your accounting procedure. This is a fraud that succeeds because it happens during a busy week to a person acting alone.

Phase 3 — Site orientation and safety

Nobody works before orientation. That includes the sub's owner, their delivery drivers who enter the work area, and the crew they add in month four.

The orientation covers:

Site-specific hazards — what is on this job that is not on every job
Site rules — hours, parking, deliveries, laydown, hot work permits, PPE, drug and alcohol policy
Hazard communication — where the safety data sheets live and how to add theirs
Emergency procedures — muster point, first aid, who calls what, how an incident gets reported and how quickly
The escalation path — who they raise a safety concern with, and that stopping work is always allowed

Then two administrative pieces:

Badging or sign-in, so you can produce who was on site on any given day
A signed site rules acknowledgement from every worker, filed

Their foreman also needs to know how your daily reporting, manpower reporting and toolbox talk expectations work, because those are the things that get missed in week one and become an argument in week six.

Phase 4 — Systems setup

The sub is joining your operating system. Show them how it runs before they are behind.

Set them up on	What they need to know
Schedule	Where the current schedule lives, how updates are published, their milestone dates, and who to tell when a date is at risk
Submittals	The submittal register, their items, the format, the due dates, and the review turnaround they can expect
RFIs	Who may raise one, the form, where it goes, and the expected response time
Pay applications	The format, the schedule of values, the cut-off date, the approval path, and when payment actually lands
Lien waivers	Which form for conditional and unconditional, at which stage, and that lower-tier waivers are required too
Change orders	How a change gets authorized, and that work performed without authorization is at their risk
Document access	Current drawings and specs, and how revisions are issued

The pay application piece deserves a real conversation, not an email. The most common cause of a late first payment is a first pay application in the wrong format against a schedule of values nobody approved.

Rule of thumb

Walk the sub's billing contact through one complete pay application cycle before the first one is due. Fifteen minutes there saves a month of cash flow argument, and cash flow arguments are how good subs become slow subs.

Also give them the who to call for what list. One name for scope and schedule, one for payment, one for safety, one for documents. Subs escalate to whoever answers, and that is usually the wrong person.

Phase 5 — The pre-mobilization gate

One person confirms this list is complete before the sub is on site. Not "in progress" — complete.

The full printable version is the subcontractor onboarding checklist.

The gate is only real if somebody is willing to hold it on a Monday morning when the sub is already in the parking lot. Decide in advance who that person is, and back them when they do it.

What to hand them on day one

Give this as one packet, on paper or as one shared folder, with a single index page. The onboarding packet template assembles it.

Item	Why they need it
Executed subcontract with all exhibits	Their copy, with the exhibits attached — not the unsigned draft
Site rules and safety requirements	The rules they just acknowledged, in writing
Site logistics plan	Access, parking, laydown, hoisting, deliveries, working hours
Emergency procedures card	Muster point, first aid, emergency numbers
Contact sheet	Who to call for scope, payment, safety, documents, and after hours
Current schedule extract	Their activities, their milestones, their float
Schedule of values, approved	What they may bill against
Pay application template and calendar	Format, cut-off dates, payment dates
Blank lien waiver forms	Conditional, unconditional, and lower-tier versions
Change order form and procedure	Including the sentence that unauthorized work is unpaid work
Submittal register extract	Their items and dates
RFI form and procedure
Insurance requirements exhibit	So their broker has it for the renewal

Handing over a complete packet on day one sets the standard for the rest of the job. Subs match the level of organization they are shown.

Onboarding Packet — day-one document set
Onboarding Checklist — mobilization gate
COI Collection & Tracking — certificates before site access

Next: keep them compliant through COI collection and tracking, and refresh the file each year at annual requalification.

Phase 1 — Contract execution​

Phase 2 — Documents​

The banking fraud warning​

Phase 3 — Site orientation and safety​

Phase 4 — Systems setup​

Phase 5 — The pre-mobilization gate​

What to hand them on day one​

Related Resources​