A general contractor does not sell trade labor. They sell sequence and risk: getting every trade through the building in the right order with the inspections in the right places, and holding a fixed price so that whatever turns up behind the wall is their problem instead of the client's. That is what the fee line on the quote buys, and it is why a carpenter running bigger jobs and an actual GC look similar from the sidewalk and are different businesses.
The number that stops homeowners is rarely the plumbing line or the cabinet allowance. It is the line near the bottom that says something like "general contracting: 18%," attached to no pipe, no lumber, and no visible day of labor. Nearly every client who has ever hired a GC has privately stared at that line and wondered what, exactly, the money buys.
If you are a trade thinking about stepping up to general contracting, you need a better answer than "overhead," because that line is the entire business. A general contractor does not sell trade work. A general contractor sells the promise that thirty things which could each go wrong will instead happen in the right order, and that when one of them goes wrong anyway, it is not the client's problem.
Understanding that is the difference between a carpenter who runs bigger jobs and an actual GC. They look similar from the sidewalk. They are different businesses.
The product is sequence, not labor
Take a modest kitchen-and-bath renovation. It involves demolition, framing adjustments, plumbing rough-in, electrical rough-in, inspection, insulation, drywall, tile, cabinets, countertop template, countertop install, finish plumbing, finish electrical, paint, and a final inspection. Call it eight trades and two inspection visits.
None of those steps is exotic. What makes the project succeed or fail is the order and the gaps. Drywall cannot close a wall until the electrical rough-in passes inspection. The countertop cannot be templated until the cabinets are set. And once it is templated, there is a two-week fabrication clock during which nothing about those cabinets can move. If the tile setter slips two days, that is not a two-day problem: the tile setter's next commitment starts Monday, so your two-day slip becomes a three-week hole while you wait for them to circle back.
The GC's actual product is a calendar in which those collisions do not happen, or get absorbed quietly when they do. The client never sees the four phone calls that moved the insulator from Thursday to Tuesday to close the gap the inspector created. They just see a job that kept moving. That invisibility is the job working as intended, and it is also why the fee looks unearned to people who only see the sawdust.
Most of the fee is risk, not coordination
Coordination is the visible half. The larger half of what a GC sells is risk transfer, and it is worth being precise about what that means, because it is what you are signing up for when you step up.
Price risk. On a fixed-price contract, the GC has told the client what the project costs before opening a single wall. Whatever is behind the wall (undersized joists, aluminum wiring, a drain sloped the wrong way), the surprise belongs to the GC unless the contract says otherwise. The client bought certainty. You sold it.
Performance risk. When the tile cracks eight months later because the subfloor was out of flat, the client does not referee a dispute between the framer and the tile setter. They call one number. The GC then has the pleasure of sorting out which sub owns the fix, or eating it. One point of responsibility is precisely what the client paid for; from the inside, it means every sub's mistake is temporarily yours.
Payment risk. This one blindsides trades who move up. As a GC you typically pay your subs and suppliers on their terms, which are shorter than the terms on which your client pays you. On a $120,000 project you can easily have $30,000 or $40,000 of other people's invoices paid out of your account before the client's next progress payment lands. The fee has to fund that float, and a GC who prices like a tradesperson (labor plus materials plus a little) discovers this in month two, at the bank.
Warranty tail. The job ends. The responsibility does not. A one- or two-year warranty on the whole assembly means you are the callback number for every trade's work long after those subs have been paid and moved on.
So when a homeowner asks what the 18% is for, the honest answer is: firm pricing on an uncertain scope, a schedule that survives contact with reality, one accountable party instead of eight, and a warranty on the whole thing. That is not markup on nothing. That is most of the product.
Sub management is the part nobody sees
Ask any working GC what actually consumes their week and the answer is not clients but subcontractors. And not because subs are bad at their trades. The structural problem is that your best subs are good, which means they are busy, which means their schedule is not yours.
A few realities of the role that the sidewalk view misses:
- You are a client to your subs. The subs you want are choosing between your job and three others. GCs who pay fast, have the site actually ready when the sub arrives, and hand over clean scope get the good crews back. GCs who pay slow and improvise get whoever was available. Your reputation with subs is as much an asset as your reputation with clients, and it is built the same way: predictability.
- Site readiness is your job. A plumber who shows up to find the framing not ready does not absorb that day. They leave, they bill or they grumble, and your slot in their calendar is gone. A large fraction of GC work is making sure that when a trade walks in, everything they need is physically present and everything in their way is gone.
- Quality control happens between trades, not after them. The moment to catch an out-of-flat subfloor is before the tile setter starts, not in the callback eight months later. Walking the job between trades with a critical eye is where a GC earns the warranty they sold.
- The paper matters. Subcontractor agreements, proof of insurance, clear written scope per trade. Not because you expect a fight, but because "I thought the electrician was patching their own holes" is the kind of gap that eats a margin $400 at a time.
What do you say when a client questions the fee?
You will get the question, usually politely, sometimes as "my brother-in-law says he could just hire the trades himself." Do not get defensive, and do not hide the fee inside the trade lines: burying it reads as having something to hide. Name what it buys:
"That line is what makes the rest of the quote real. It covers me pricing the job firm so the surprises are mine and not yours, running eight trades in the right order so the project takes nine weeks instead of five months, being there for every inspection, and being the one number you call for the next two years if anything is not right. If you hire the trades yourself you save the fee and you take on all of that yourself. Some people do, and it is a part-time job."
Every clause in that answer is true, which is why it works. The brother-in-law can hire the trades. What he cannot easily do is get them to show up in sequence, hold them accountable to each other's work, or absorb the surprise behind the wall.
When should a trade step up to GC work?
Plenty of excellent tradespeople should become GCs. The signs it is time usually look like this:
You may already be doing it informally: clients ask you to "just handle" the electrician and the painter on your jobs, and you are coordinating other trades, taking responsibility for their timing, and marking up their work. What you are missing is the fee structure and the contracts that would protect you. Or clients already trust you with the whole project. The best entry into GC work is rarely a cold bid; it is the existing client who says "we want to do the whole basement, can you take it on?" Relationship-first GC work is more forgiving of a learning curve than competitive bidding, where the low bid usually belongs to whoever forgot the most. Be honest with yourself about whether you like the phone more than you admit, too: the working day of a GC is calls, scheduling, site walks, and problem triage, with the tools mostly staying in the truck. Some tradespeople find that liberating; others discover within a year that they hate the job they promoted themselves into, and that is an expensive discovery. And last, you need a cash cushion. This one is not optional, for the payment-float reason above: if a slow month currently threatens your rent, a GC's float will threaten your business. Most trades who move up successfully do it with several months of overhead banked or an operating line arranged first.
When should you wait?
Do not step up to escape low trade margins. A 15% fee on a $150,000 project is $22,500, which sounds like real money until you notice it carries 100% of the project's risk. If an $11,000 surprise lives behind the drywall, half the fee is gone. Trades who move up for the margin and price like optimists are one bad wall away from working for free.
Do not step up without the paperwork side handled. Licensing requirements for general contracting vary a lot by province and state: some require a specific GC license, exams, or registration; some regulate it lightly. Insurance changes too: your liability exposure now covers the whole project and other people's work. Find out what your jurisdiction requires before the first contract, not after the first claim.
Do not step up on a job that is too big to be a lesson. A sensible first GC project is one where you can name every trade you will need, you have personally worked alongside most of them, and a 20% overrun would hurt but not sink you. A whole-home renovation for a stranger, bid competitively, is not a first project. It is a tuition bill.
And know that you can do both. Many small GCs keep self-performing their own trade on their projects: the carpenter-GC who frames and trims, subbing the rest. That hybrid keeps your labor productive and your quotes sharper on the scopes you know cold. The trap is letting your tool time starve the coordination; on days when you are on the tools, the phone calls still have to happen.
Keeping the coordination in one place
Whatever the job's size, the GC role runs on the same raw material: who is supposed to be where, what got decided, and what it looked like at each stage. Zeus keeps that on the phone that is already in your pocket: a Work Board with a dispatch lane per crew and a multi-day Gantt planner for sequencing trades, a subcontractor directory with their contracts attached, and day logs for what actually happened. Job photos GPS-match themselves to the right job, so the "what did that wall look like before drywall" question has an answer two years later. Change orders ride the same quote-and-signature flow as the original estimate, which matters more on GC work than anywhere else, because scope moves constantly and every unwritten change is yours to absorb.
None of that replaces the judgment. It just means the judgment is working from a record instead of a memory.
Frequently asked questions
Do I need a license to work as a general contractor?
It depends heavily on where you work. Some provinces and states license general contractors specifically, some require registration or exams above certain contract values, and some barely regulate the role while strictly licensing the trades underneath it. Check your provincial or state authority and your municipality before signing a GC contract. Operating unlicensed where a license is required can make your contract unenforceable, which means the payment problem is yours.
What is a typical GC fee?
Commonly somewhere between 10% and 25% of project cost, depending on scope, risk, and how much the GC self-performs. The structure varies too: fixed price with the fee inside it, or cost-plus where the client sees actual costs plus a stated percentage. Cost-plus shifts price risk back to the client and suits jobs with genuinely unknowable scope; fixed price pays you for absorbing that risk and should be priced like it.
Can I still do my own trade on jobs I'm running as GC?
Yes, and many small GCs do: it keeps your crew billable and your pricing sharp on the scopes you know. The discipline is treating your own crew like any other sub: written scope, a slot in the same schedule, and the same quality walk between phases. The day your own trade work gets scheduling favoritism is the day the sequence starts slipping.
What's the single most common way new GCs get hurt?
Cash flow, not workmanship. Paying subs and suppliers on short terms while the client pays on milestones means the GC funds the gap. New GCs who priced the fee thin, skipped a deposit, or let a progress payment slide a few weeks find themselves borrowing to pay subs on a profitable job. Invoice on milestones, collect deposits where lien law in your area allows, and treat an aging receivable as an emergency, because at GC scale it is.
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