GC (general contractor) explained. Role, license, pay, paperwork

GC stands for general contractor. That's the easy part.

The hard part is that the same two letters describe the person who built your neighbor's deck and the firm that just delivered a 1.2 million square foot warehouse on a fixed price. The job title doesn't change. The scale, the paperwork, and the risk do.

This guide covers what a GC actually does on any project, how licensing works state by state, the three ways GCs get paid, and the paperwork loop that turns a job into a check. If you're hiring a GC, becoming one, or working alongside one, this is the role explained from the ground up.

What "GC" means

A general contractor is the contractor who signs the prime contract with the project owner and takes responsibility for delivering the finished building.

You'll see a few other terms used in the same slot. Prime contractor is the legal version used on federal and most public-sector work. Builder is the informal version used on residential jobs. General building contractor appears on state license categories. They all refer to the same role: one party, one contract with the owner, one phone number when something goes wrong.

The GC sits between the owner above them and the subcontractors below. The owner says what they want built. The GC figures out how, hires the trades, runs the schedule, and hands back a finished building. The owner pays the GC. The GC pays the subs. That two-step is the entire construction payment system, and it's where most of the legal complexity in this industry lives.

Roughly 60 to 70 percent of the dollar value on a typical commercial job flows from the GC to subcontractors, not to the GC's own crews. The GC's main product is coordination, not framing.

What a GC actually does

Five jobs the GC owns. If any of these falls through, the job stops.

Bidding and contracting. The GC reads the plans, gets pricing from subs, builds an estimate, and submits a bid. If they win, they sign the prime contract with the owner. That contract sets the price, the schedule, the scope, and the rules for change orders.

Hiring and managing subs. Most GCs self-perform 10 to 30 percent of the work and sub out the rest. The GC writes the sub contracts, schedules each trade onto the site, and is on the hook if a sub doesn't show. A roofer who skips a Tuesday is the GC's problem, not the owner's.

Permits and inspections. The GC pulls the building permit in the firm's name and shepherds the job through every required inspection. Foundation, framing, mechanical, electrical, plumbing, final. Each one is a hard stop until it passes. If something fails, the GC pays for the rework and the rescheduling.

Schedule and site control. A construction schedule is dozens of trades stacked into a sequence where each depends on the one before. The GC keeps that sequence moving, runs weekly site meetings, and updates the owner. They also own jobsite safety. OSHA cites the controlling contractor when something goes wrong, and that's almost always the GC.

Billing and the payment loop. Every 30 days the GC submits a pay application to the owner showing what got built that month. Once the owner approves and pays, the GC pays the subs. Lien waivers move with each step. That billing loop is the heartbeat of the job.

You can hear the same role described from the trade-association side in the Associated General Contractors of America's overview of general contractor responsibilities, which puts it more formally but with the same bones.

Licensing: 33 states require one, the rest don't

Whether you legally need a state license to call yourself a GC depends on where you work.

About 33 states require a state-level general contractor license to take a job above a dollar threshold (often $1,000 to $50,000). The bigger ones in this group include California, Florida, North Carolina, Virginia, Arizona, Tennessee, and Nevada. In those states the qualifying party usually has to pass a trade exam and a business management exam, show financial statements, post a bond, and carry workers' comp.

The other group leaves licensing to local governments or skips it. Texas, Colorado, Kansas, and Illinois have no statewide general contractor license. That doesn't mean anyone can just start swinging hammers. Cities like Houston, Austin, and Denver still require local registration, inspections, and proof of insurance. New Jersey is transitioning to a statewide system under the Home Improvement and Home Elevation Contractors Licensing Act, with new requirements rolling out by February 2026.

A few practical rules that hold everywhere:

• Almost every state requires a license to do electrical, plumbing, or HVAC work, even when the GC license itself isn't required. Those trades have their own boards.
• A license in one state doesn't carry to another. If you're a Tennessee GC bidding work in Kentucky, you're starting over.
• "Handyman" and "home improvement contractor" are usually separate, lower-tier categories with their own caps on job size.

For the canonical list, the U.S. Small Business Administration licensing portal links out to every state's contractor board. Check the actual board's site before assuming a forum post is current.

How GCs get paid: lump sum, cost-plus, T&M

Three common compensation models, each one moving risk in a different direction.

Lump sum (fixed price). One number for the whole scope. The owner knows the price on day one. If the job costs more than the GC estimated, the GC eats it. If it costs less, the GC keeps the difference. This is the standard for jobs where the scope is well-defined: warehouses, fit-outs with finished plans, most public-sector work.

Cost-plus. The owner reimburses the GC for actual costs plus a fee. The fee can be a fixed dollar amount, a percentage of cost (commonly 8 to 15 percent), or a percentage with a guaranteed maximum price (GMP) as a cap. Cost-plus is used when scope is fuzzy at the start, when speed matters more than certainty, or on complex renovations where surprises are guaranteed.

Time and materials (T&M). The GC charges an hourly rate for labor and the cost of materials plus a markup, usually 10 to 20 percent. T&M is the right call for small jobs, change orders inside a larger contract, and emergency repairs. It's the riskiest model for the owner because the meter is always running.

There's a fourth model worth knowing: unit price, where the GC quotes per unit (per cubic yard of concrete, per square foot of drywall). It's common in heavy civil and infrastructure work but rare on building projects.

The AIA's contract documents library publishes the standard forms for all of these, and they're the industry's reference set when a contract goes to court.

The paperwork loop only the GC sees

Here's the part most articles skip: a GC's biggest day-to-day workload isn't pouring concrete. It's paperwork that moves money.

The monthly payment cycle on a typical commercial job looks like this:

1. The GC's subs submit pay applications. Each one shows percent complete by line item.
2. The GC reviews, adjusts, and rolls the subs into a master pay app to the owner.
3. The owner's architect or PM certifies the pay app.
4. The owner cuts a check (or wires) to the GC, usually 30 to 45 days after the pay app date.
5. The GC pays the subs. The subs pay their sub-subs and suppliers.
6. Lien waivers get signed at every step and filed with the owner as proof of payment.

That last step is where the loop closes. A contractor lien waiver is a signed receipt that releases lien rights for a specific payment. The GC collects them from subs and submits them to the owner with every pay app. If a waiver is missing, the owner can hold the next payment, and the whole cycle stalls.

The waiver flow is also where most GCs lose time. Email chains. Wrong forms for the state. Sub-tier waivers that never come back. A typical GC running 20 active jobs is chasing dozens of signed PDFs in any given week, and one missing waiver can stall a six-figure payment.

That's the workflow we built LienDone's lien waiver software for. Send the link, the sub signs on their phone, the signed PDF lands in the GC's dashboard. The state-specific statutory forms are built in. The audit trail is automatic. How to send a lien waiver in two minutes walks through the day-to-day flow, and what is GC pay covers the broader pay-app loop that waivers sit inside.

The takeaway

A GC is the general contractor. The role is one contract above, many contracts below, and a stack of paperwork moving money through the middle.

If you're hiring one, ask three questions before you sign: are they licensed for this state and this scope, which compensation model are they proposing, and how do they handle lien waivers from their subs. The first two are due diligence. The third is what tells you whether your final payment will actually close clean.

FAQ

What does GC stand for in construction?

GC stands for general contractor. They sign the prime contract with the owner, hire the subs, and run the job.

Is a GC the same as a builder?

Close but not identical. "Builder" is informal and usually residential. "General contractor" is the legal term and works on any project type.

Do you need a license to be a GC?

In about 33 states yes, statewide. In Texas, Colorado, Kansas, and Illinois there's no statewide license, but cities usually require registration and proof of insurance.

How does a GC make money?

Lump sum (one fixed price), cost-plus (cost plus a fee), or time and materials (hourly plus marked-up materials). Each shifts risk between the GC and the owner.

Why does a GC need lien waivers?

To prove the owner won't pay twice for the same work. When the GC collects signed waivers from every sub at every pay cycle, the owner has a clean record that no lien is coming.

Can a homeowner act as their own GC?

In most states yes, on their own primary residence. You sign each trade contract, pull permits in your name, and take on the scheduling and legal exposure a licensed GC would normally carry.