What is the difference between a general contractor and a construction manager?
In the general contractor vs construction manager comparison, a general contractor holds the trade subcontracts and builds the work, carrying means-and-methods and price risk. A construction manager coordinates design, schedule and cost for the owner, and holds trade contracts only under a construction manager at risk contract with a guaranteed maximum price.
General Contractor vs Construction Manager: The Core Distinction
The general contractor vs construction manager question is rarely about who is more qualified. It is about who signs the prime agreement, who holds the subcontracts, and which party absorbs a cost overrun. Two firms can staff identical superintendents and still carry completely different risk because their contracts differ.
A general contractor contracts directly with the owner to build the work, usually on a lump sum or a guaranteed maximum price. A construction manager contracts to manage the process; whether that manager also holds trade contracts depends on the delivery model. Read the signature blocks before comparing resumes, because the general contractor vs construction manager comparison turns on that one line.
| Delivery model | Owner's prime contract | Holds trade contracts | Price basis |
|---|---|---|---|
| Design-bid-build with GC | General contractor | GC | Lump sum or unit price |
| CM at risk (AIA A133) | CM at risk | CM at risk | GMP after preconstruction |
| Agency CM | Construction manager (services) | Owner or separate GC | Fee plus owner-held trade contracts |
| Owner's representative | Representative (services) | GC under separate contract | Fee only |
| Design-build | Design-builder | Design-builder | Lump sum or GMP |
Who holds the contract with the owner
Under the AIA A101 family of agreements, the owner and general contractor sign a single prime contract covering the entire scope, and the contractor's price sits in the contract sum. Under an AIA A133 construction manager at risk contract, the owner and CM sign a preconstruction agreement first, then amend it to a guaranteed maximum price once design is sufficiently complete. An agency CM instead works under a professional services agreement, often paired with a separate contract for the builder.
The practical test is simple: if the owner has one signature for the whole building, that party is the GC or the CM at risk. If the owner signs trade contracts directly, the manager is an advisor. Ask who issues the schedule of values that drives monthly billing, because that party controls the money flow.
Who holds subcontracts and carries risk
The GC holds every trade contract and pays each subcontractor from the prime contract receipts, so a defaulting mechanical subcontractor is the GC's problem, not the owner's. The CM at risk holds those same trade contracts and passes the risk down the same way, which is why the two roles converge at the point of construction. The agency CM holds nothing and carries no construction risk.
That distinction drives bond and insurance placement. Performance and payment bonds, builders risk, and the general liability program attach to whoever holds the trade contracts, and the bonded party's balance sheet is what the surety underwrites. When an owner asks why a CM at risk needs a bond capacity equal to a GC, the answer is that legally it is acting as one.
Where each sits in the delivery chain
In design-bid-build, the design team finishes documents, bid-ready packages go out, and the GC is selected on price before mobilizing. In construction management at risk, the CM joins during design, contributes constructability review and value engineering, and converts to a GMP before the trade packages are bought out. The construction manager vs general contractor choice therefore changes when the builder's input reaches the drawings.
Our construction management services page covers how that early involvement is scoped, and our general contractor estimating page covers the bid-side counterpart. Either way, the estimate you compare bids against should show unit, quantity, and source for every line.
What a General Contractor Actually Does on a Project
The general contractor vs construction manager distinction shows up in daily paperwork as much as in contract type. A GC assembles bid packages, awards trade contracts, runs the site, and certifies each pay application against installed work. The construction manager model moves some of that work earlier, but the field mechanics of building the job do not change.
Note who hires the construction manager: the owner, always, because the CM agreement is a professional services or prime construction contract with the owner. A subcontractor never hires the CM, which is why trade-level questions about authority should be routed through the owner's contract documents.
| Phase | GC deliverable | Evidence in the file |
|---|---|---|
| Bid | Leveled bid packages by division | Bid tab with scope narratives |
| Award | Trade contracts and purchase orders | Signed subcontracts, bonds |
| Construction | Schedule updates, RFI log, submittal register | Dated logs and meeting minutes |
| Billing | Monthly pay application | Schedule of values, lien waivers |
| Closeout | Punch list, as-builts, warranties | Signed completion certificate |
Loaded labor rate calculator
- Loaded rate
- $31/hr
- Blended with overtime
- $32/hr
- Labor hours
- 320
- Crew labor cost
- $10,279
Burden covers payroll taxes, workers’ compensation, insurance and benefits; it varies by state, trade and company. Overtime is priced at time and a half.
Bidding, subcontracting, and self-perform decisions
The GC breaks the work into CSI MasterFormat divisions, issues each bid package with a scope narrative and alternates, and levels the returned bids before award. Self-perform is a pricing decision: a GC with concrete crews may bid Division 03 in-house to control schedule, while a firm without crews subcontracts it. Every self-performed line still needs a crew-hour basis, which is what the calculator below builds from base wage, burden, overtime share, crew size, and hours.
Supervision is the line most often understated. A first-line supervisor's wage plus burden and overtime allocation belongs in the general conditions or the self-perform rate, not buried in a trade markup. Run the numbers before you compare a self-perform bid against a subcontractor quote.
Site supervision, scheduling, and quality control
The GC owns the critical path, the three-week look-ahead, and the daily log. Quality control runs through submittals and shop drawings: the GC logs each submittal, routes it to the design team, and holds work until the reviewed version is returned. Requests for information are tracked with dates so a delay claim can be traced to a specific unanswered RFI.
Safety, site logistics, temporary power, and laydown are general conditions costs that scale with duration, not with contract value. A GC that compresses the schedule shifts cost from general conditions into overtime and shift premiums, which is exactly the trade-off the calculator below makes visible. The general contractor vs construction manager split matters here too: a CM at risk carries the same field obligations, while an agency CM tracks them without holding the trade contracts.
Payment applications and closeout
Each month the GC submits a pay application supported by a schedule of values, subcontractor invoices, and conditional lien waivers, and the owner releases progress payment less retainage. Change orders are priced and logged against the same schedule of values so the final account reconciles. Closeout delivers as-builts, O&M manuals, warranties, and a punch list cleared item by item before final payment and unconditional waivers.
Our what does a construction estimator do page shows how the original quantities behind those schedule-of-values lines are produced, and the how to become a construction estimator guide covers the training path behind those quantities. If you are assembling a bid, send your plans and we will price the packages with the measurement rules shown.
What a Construction Manager Does — and the CM-at-Risk Variant
What does a construction manager do depends entirely on which CM you mean. An agency CM advises the owner, reviews design, and coordinates the schedule without holding a single trade contract. A CM at risk holds the trade contracts and guarantees a maximum price, which makes it a builder with an advisory preconstruction phase. Conflating the two produces most of the confusion in the general contractor vs construction manager debate.
Our construction management page describes the advisory scope in detail; the sections below separate the fee models that follow from it.
| Model | Fee basis | Holds trade contracts | Who absorbs overruns |
|---|---|---|---|
| Agency CM | Fixed fee or % of construction cost | No | Owner, through trade contracts |
| CM at risk | Stated fee plus GMP with contingency | Yes | CM above GMP; owner for directed changes |
| Owner's representative | Fixed monthly or hourly | No | Owner or GC under separate contract |
| GC lump sum | Embedded in contract sum | Yes | GC |
| GC cost plus fee | Fee on actual cost | Yes | Owner, subject to a cap if stated |
Agency CM vs CM at risk vs CM as owner's rep
The agency CM signs a services agreement, reports to the owner, and recommends awards while the owner signs each trade contract. The CM at risk signs the trade contracts itself and carries the cost and schedule risk above the GMP. The owner's representative is narrower still: it acts with delegated authority but typically holds no design or construction contract.
Each role changes who absorbs a change order. With an agency CM, the owner pays the trade contractor directly and the CM's fee is unaffected. With a CM at risk, a change above the GMP is the CM's exposure unless it qualifies as an owner-directed change under the contract's specific clauses.
Preconstruction involvement and constructability review
Construction manager duties during preconstruction include constructability review of the drawings, value engineering options with cost and schedule impact stated, early procurement of long-lead items, and a milestone schedule tied to design deliverables. The CM also builds the trade package breakdown so bid packages are issued as design packages complete, which compresses the overall schedule.
A useful constructability comment names the line item, the unit, and the fix. "Rebar congestion at the mat foundation will slow placement" is an opinion; "two-way mat reinforcement at 12 in. on center each way conflicts with the 8 in. embed plate layout, adding an estimated 40 crew-hours" is a review comment an estimator can price.
Fee structures: percentage, fixed fee, GMP
The gc vs cm fee structure differs in what the fee applies to. A GC's fee and overhead are typically embedded in a lump sum or a GMP, so the owner sees one number. An agency CM bills a fixed fee or a percentage of construction cost for services only. A CM at risk earns a stated fee on top of actual trade costs, with savings above the GMP sometimes shared under a pre-agreed split.
Contingency is where the models diverge most. The CM at risk usually carries a construction contingency inside the GMP and must justify draws against it, while an owner-held contingency under an agency CM stays visible in the owner's ledger. Either way, ask for the contingency balance at each pay application. Our professional general contractor estimating scope covers the GMP-side pricing that supports those negotiations.
How the Two Roles Compare: Risk, Cost, and Control
The cleanest way to separate the two roles is to ask who holds the pencil when a trade's number comes back wrong. Under design-bid-build, the general contractor signs trade contracts and absorbs the difference between its lump-sum bid and what the subcontractor actually charges, so general contractor responsibilities include that spread. Under agency CM, the owner signs every trade contract directly and the CM coordinates; the owner keeps the overrun. Risk does not disappear in either model — it moves, and the move has a price.
That price shows up as contingency. An owner who transfers risk to a GC pays for it inside the bid, because the GC prices the uncertainty it is accepting. An owner who retains risk through an agency cm arrangement usually sees a lower fee line but must fund a reserve wide enough to cover trade buyout gaps, scope growth and escalation. The calculator below converts a base estimate and an AACE estimate class into a low/high contingency band and a budget range, which is the fastest way to see how much reserve a risk-retaining owner should hold.
| Attribute | Lump-sum GC (design-bid-build) | CM at risk (GMP) | Agency CM |
|---|---|---|---|
| Trade contracts signed by | General contractor | CM, assigned or held | Owner |
| Cost overrun risk | GC, up to contract sum | CM above GMP; shared within GMP | Owner |
| Price certainty timing | At bid, after design complete | At GMP amendment | At each trade buyout |
| Schedule flexibility | Limited; sequential bidding | Moderate; early packages possible | Highest; phased packages |
| Owner decision load | Low | Moderate | High |
| Fee basis | Markup in lump sum | Fee plus contingency, open book | Fixed or percentage fee |
| Contingency holder | GC, inside bid | CM, drawn by change order | Owner reserve |
| Bonding | Performance and payment bond from GC | Bond on CM at risk | Bonds per trade contract |
Contingency range by estimate class
- Low contingency
- $150,000 (10%)
- High contingency
- $300,000 (20%)
- Budget range
- $1,650,000 – $1,800,000
Typical planning ranges that follow the AACE estimate-class idea: less design, more contingency. Set the final figure from a risk review of your own project.
Who carries cost overrun risk
In a lump-sum GC contract the overrun sits with the contractor up to the contract limit; change orders only move cost back to the owner when the cause is owner-directed, a differing site condition, or a design document conflict. In agency CM the owner's exposure is direct and continuous, because each trade contract is the owner's contract. Construction manager duties during preconstruction — constructability review, trade package scoping, early cost modeling — are largely an effort to shrink that exposure before ground is broken. When a request for information reveals a drawing conflict mid-construction, the answer determines which party's contingency absorbs the fix.
Speed vs price certainty tradeoffs
A hard bid gives a firm number only after drawings are complete, so price certainty arrives late. CM at risk with a guaranteed maximum price can lock cost earlier, at the price of a contingency and fee the CM holds until closeout. Agency CM is the most schedule-flexible and the least price-certain: you can start early packages before design finishes, but you carry the buyout risk on every one. There is no configuration that delivers both early start and a fixed price without someone funding the gap.
Owner control and decision load
Agency CM hands the owner more control and more decisions: trade contract awards, pay applications, lien waivers and change approvals all route to the owner's desk. A GC model compresses that into one contract and one schedule of values, which suits owners without a full-time construction staff. Count the decisions before choosing — an owner who cannot turn a submittal review in five business days will slow an agency CM model more than a GC model, because more of the critical path runs through owner approvals.
How Each Role Prices Work: Traceable Cost Build-Ups
Both roles start from the same quantities: cubic yards of concrete, square feet of gypsum board, linear feet of conduit, pounds of ductwork. The divergence is in what gets wrapped around those quantities. A GC bid is a closed number built from subcontractor quotes plus markup, while a CM preconstruction budget is an open model built from unit costs plus allowances — and the gap between the two is exactly where the general contractor vs construction manager comparison usually turns into a dispute.
For a quick order-of-magnitude check before trades are priced, the calculator below takes building area, a base hard cost per square foot, soft-cost percentage, contingency percentage and escalation percentage and returns hard cost, soft costs, contingency, escalation, budget total and all-in cost per square foot. It carries no prices of its own; every input is yours, which makes it useful for testing how a two-point swing in contingency moves the total.
| Estimate line | GC hard bid | CM preconstruction budget |
|---|---|---|
| Concrete, cu yd | Sub quote, firm | Unit cost plus allowance |
| Division 26 electrical | Bid package, leveled | Budget from prior packages |
| General conditions | Percentage or lump sum | Line-item staffing plan |
| Contingency | Inside bid markup | Separate drawable line |
| Escalation | Minimal at bid date | Allowance to mid-construction |
| Fee | Overhead and profit markup | Fixed or percentage fee |
| Bond | Performance and payment premium | Per contract or CM bond |
| Documentation | Bid form and scope sheets | Open-book budget with backup |
Square-foot budget calculator
- Hard cost
- $444,000
- Soft costs
- $53,280
- Contingency
- $49,728
- Escalation
- $21,880
- Budget total
- $568,888
- All-in per sq ft
- $237
Enter your own base rate from a recent bid, cost book or estimator. The default values are placeholders for the math, not market prices.
GC hard bid: quantities, labor, subcontractor quotes
A bid-ready GC estimate is assembled division by division in CSI MasterFormat order. Structural concrete is quantified from the foundation and framing sheets, then priced with a crew rate built from published wage data and a productivity assumption; mechanical and electrical go out as bid packages to subcontractors, and the returned quotes are leveled for scope gaps before they enter the estimate. The GC's own work — supervision, temporary facilities, cleanup — is priced as general conditions, and markup covers overhead and profit. A performance bond premium is added as a percentage of contract value.
CM preconstruction: budgets, trade packages, contingency
A CM's preconstruction budget is a living document. Early on it may be a parametric model by building type and area; as design advances it converts to systems-based takeoffs, then to trade packages priced against a defined scope narrative. A rfi log tracks unresolved design questions that could move those packages, and each unresolved item stays in contingency until it closes. Under a GMP, the CM's fee and contingency are visible line items, so the owner can see what is being held and why.
Where the two estimates diverge
Three lines account for most of the difference. First, contingency: a GC buries it in the bid, while a CM shows it as a separate, drawable line. Second, escalation: a bid is priced at bid date, while a CM budget spanning eighteen months must carry an escalation allowance — lumber, ready-mix, steel and copper wire all move at different rates, and the PPI series tracked on this site show how far apart those movements can run. Third, general conditions and fee: a GC's markup is a percentage, a CM's fee may be fixed or cost-plus. Reconcile those three lines and the two estimates usually converge.
Which Delivery Model Fits Your Project?
Delivery model selection is a fit question, not a ranking. The variables that matter are design completeness at the moment you need a price, how much schedule compression the project can absorb, and whether the owner has staff to administer multiple contracts. Get those three answers and the model usually selects itself. If you are still assembling the cost side of that decision, our team can build general contractor estimates from a bid set or a preconstruction model, with every quantity traceable to a sheet.
One caution applies to every model: the contract form drives the cost structure. AIA A101 with A201 suits lump-sum work, while A133 fits cost-plus with a GMP. Read the compensation article before you compare fee percentages, because a 4% fee on a cost-plus contract and a 4% markup inside a lump sum are not the same number.
| Project condition | Best fit | Why |
|---|---|---|
| Design 100% complete, public bid | Design-bid-build with GC | Firm competitive price, single contract |
| Design 60–90%, schedule pressure | CM at risk with GMP | Early packages, cost capped |
| Owner has construction staff | Agency CM | Direct trade contracts, full visibility |
| Occupied renovation, unknowns | CM at risk or agency CM | Contingency absorbs existing conditions |
| Fast-track, phased occupancy | CM at risk | Trade packages bid before design ends |
| Small tenant improvement | Lump-sum GC | Administration cost outweighs flexibility |
| Multiple prime trades, owner-led | Agency CM | Owner coordinates, CM advises |
Design-bid-build with a GC
Choose this when drawings and specifications are complete, the owner wants a single contract, and price certainty at award matters more than early start. Competitive bidding among prequalified GCs gives a defensible number, and the payment bond protects the owner against subcontractor default. The tradeoff is sequential: design, then bid, then build, with little overlap. It is the right fit for publicly bid work and for owners without construction staff.
CM at risk or agency CM scenarios
CM at risk fits when design is substantially developed but not complete, the owner wants a GMP before construction, and schedule overlap has real value. The CM holds trade contracts and carries the overrun above the GMP. Agency CM fits when the owner has an owner's representative or in-house construction management, wants full visibility into each trade contract, and can handle the submittal and pay-application load. In cm vs gc construction terms, the agency model trades price certainty for control and transparency.
Renovations, fast-track, and complex phased work
Renovation work in occupied buildings rarely fits a clean lump sum, because unknown existing conditions surface after demolition. A CM at risk with a well-funded contingency, or an agency CM with the owner holding reserve, handles that uncertainty better than a bid with heavy assumptions buried in it. Fast-track and phased work — a hospital wing built in stages, a school renovated over one summer — reward early trade package awards, which is CM territory. For any of these, an independent quantity takeoff before award gives you a benchmark to test the returned numbers against; you can send your plans to get a quote on that scope.
Licensing, Contracts, and Common Misconceptions
The general contractor vs construction manager question turns legal the moment you look at who is licensed to build. Most states license or register general contractors at the entity level and require a qualifying party to pass a trade or business exam; construction managers who only advise usually fall outside that requirement. A construction manager at risk does not: because CM at risk holds the trade contracts and delivers the finished building, states that license contractors typically expect the CM at risk to carry the same license as a GC. Confirm the rule with your state licensing board and the local building department before you sign, because the answer changes the insurance and bond package as well as the contract form.
Related work we price the same way: construction estimate: how to calculate costs (+ example and template).
| Item to verify | General contractor (design-bid-build) | Construction manager at risk | Agency construction manager |
|---|---|---|---|
| State contractor license | Required in licensed states | Required in most licensed states | Usually not required for advisory-only scope |
| Performance and payment bonds | Required at contract sum | Required at GMP | Not applicable; no trade contracts held |
| Professional liability policy | Optional | Common | Expected |
| Builders risk policy | Per contract clause | Per contract clause | Owner usually carries |
| Contract form | AIA A101 with A201 | AIA A133, cost plus fee with GMP | Owner-CM professional services agreement |
| Fee basis | Lump sum with trade buyout | Cost of the work plus fee, capped by GMP | Fixed fee or hourly |
| Contingency owner | Contractor, inside lump sum | Owner, drawn by change order | None held |
Title inflation in job postings
Job titles do not map to contract roles. A firm may call a project engineer a construction manager, and a residential GC may run five houses a year under the same title a $200,000,000 program uses. When you compare construction manager vs general contractor salary postings, check the scope line, not the title: fee-and-advice work and at-risk delivery pay differently because the risk differs. BLS wage data for cost estimators and first-line construction supervisors gives you a defensible baseline for the preconstruction and field staff either role will bill, and our breakdown of the construction estimator career path shows the credentials behind those numbers. The same caution applies to the punch list — ask who closes it out and who pays for the trades that return.
Frequently Asked Questions
What is the difference between a general contractor and a construction manager?
A general contractor holds the trade contracts and builds the work; a construction manager coordinates design, schedule and cost on the owner's behalf, and may or may not hold trade contracts. The general contractor vs construction manager split comes down to who signs the subcontracts and who carries construction risk. In design-bid-build the GC signs them; in agency CM the owner does.
Is a construction manager the same as a CM at risk?
No. An agency CM advises and administers without holding trade contracts, so the owner keeps construction risk. A construction manager at risk signs a separate contract, typically AIA A133, holds the trade contracts, and delivers the job at a guaranteed maximum price. The CM-at-risk contract converts the advisor into a party at risk once the GMP is set.
Who carries more risk, a general contractor or a construction manager?
A CM at risk carries risk comparable to a general contractor: trade performance, schedule, and cost above the GMP unless the contract shares it. An agency CM carries little construction risk and instead owes professional duties of care. Read the contract's contingency, shared-savings and liquidated-damages clauses before assuming where risk sits.
Do construction managers need a contractor license?
It depends on the state and on whether the CM holds trade contracts. Many states license only those who build or contract to build, so an agency CM may need no contractor license, while a CM at risk usually does. Confirm the requirement with the state licensing board and the local building department before signing.
Is a construction manager cheaper than a general contractor?
Neither role is inherently cheaper; the fee structure differs. A GC typically prices a lump sum with markup buried in the bid, while a CM may charge a fixed fee, cost plus fee, or a GMP with open-book costs and a contingency. The fee is quoted per project after reviewing the plans, so compare the total cost build-up, not the headline percentage.
Can one company act as both general contractor and construction manager?
Yes, and it is common. A firm can provide preconstruction services as a construction manager, then convert to a CM at risk or a general contractor when the GMP or lump sum is set. The contract must state which role applies at each phase, because insurance, bonding and licensing obligations change at conversion.
How does the choice affect the estimate and the bid packages?
The delivery model sets the bid packages. A GC bids complete CSI MasterFormat divisions to trade subcontractors; an agency CM splits work into packages the owner awards, so the estimate must price each package separately. Send the drawings, the proposed package list and the contract form, and we return a traceable takeoff with unit costs, quantities and sources.