What's Inside a Construction Budget: Line-by-Line Breakdown

A construction budget breakdown typically lists general conditions, trade costs organized by CSI division, allowances, contingencies, insurance and bond, and the contractor's fee. In a GMP these lines are itemized. AIA's GMP exhibit, for example, lists allowances, the construction manager's contingency, alternates and fee alongside the Cost of the Work.

This article sits inside our construction cost estimating guide and focuses on the contractor's side of the budget.

What does a construction budget breakdown contain?

A general contractor (GC) builds the budget in layers. The bottom layer is the cost of the work itself, priced by trade. On top sit the GC's own site costs, reserves, risk transfer items and margin. A clear budget keeps each layer on its own line so you can see where money sits.

Most GCs organize trade costs by CSI MasterFormat, the Construction Specifications Institute's numbered division system. Dividing the work this way lets you compare the GC's budget against the designer's estimate and against bids.

Owner costs, such as land, design fees, permits and financing, sit outside this budget. They are covered in our article on hard costs vs soft costs.

What are general conditions and general requirements?

General conditions are the contractor's costs of running the job rather than building one particular trade item. They typically include the superintendent and project management staff, temporary power and water, site fencing, dumpsters, safety, cleanup, and similar items. In CSI MasterFormat, related requirements fall under Division 01 – General Requirements.

Public-sector contract forms show how owners handle them. Georgia's State Financing and Investment Commission CM agreement and Greenville County Schools' RFP 124-22 are examples where general conditions are a capped lump sum or a monthly or daily rate, not a percentage of the work. That structure rewards finishing on time and makes it easier to price a time extension.

No source we found confirms a typical percentage for general conditions, so avoid quoting one without a project-specific basis. Ask the GC to show staffing durations and unit rates, then compare against the schedule.

What trade costs belong in the budget by CSI division?

Trade costs make up the bulk of the budget. The divisions you will see most often are listed below, with the kinds of work each holds.

For the pricing of individual trades, see the cost-by-trade articles in this series. As an owner, your main task is to confirm that every division in the specifications has a line, and that the sum of lines equals the number you are being asked to approve.

What are allowances and how do they appear in the budget?

An allowance holds a dollar amount for an item not yet selected or priced, such as finish hardware or light fixtures. AIA's contracting basics explain that, under A201, an allowance covers materials and equipment delivered to the site plus taxes less trade discounts. Labor, installation, handling and the contractor's overhead and profit belong in the Contract Sum, outside the allowance. The difference between actual cost and the allowance is adjusted by change order.

Practical consequence: an allowance of $200,000 for fixtures does not tell you the installed cost. Ask the GC to state what the allowance includes, who decides, and by what date the selection must be made. Our article on allowances vs unit prices vs lump sum covers the contract language.

What contingency lines appear in the budget?

A GMP exhibit often shows the construction manager's contingency as a separate line. Public owners publish their sizing rules. Colorado's Office of the State Architect, in its April 2022 GMP FAQ (as summarized from its published FAQ), uses a construction contingency of 3% of the GMP for construction manager/general contractor projects and 3.5% for design-build, plus a bidding contingency of 2.5% of the GMP.

Those percentages suit one state's program and are not national norms. For how reserves are sized by project phase and who controls them, see construction contingency percentage by phase.

Make sure of three things in every budget: the contingency is a visible line, the contract states what it can be used for, and the balance returns to you at completion unless the agreement says otherwise.

What are alternates, unit prices and the schedule of values?

Three more items often appear next to the main budget lines.

• Alternates are priced options, such as an upgraded facade or an added floor of parking, that the owner can accept or reject before award. Their prices lock in only if you accept them by the deadline, so decide quickly after bids.
• Unit prices are rates for work whose quantity is uncertain, such as extra rock excavation. The final cost equals the rate times the installed quantity, so the total can rise or fall.
• The schedule of values breaks the contract sum into pay items so the contractor can bill monthly. A front-loaded schedule pays the contractor early and leaves the owner with less leverage late, so review it against the budget lines before approving the first payment.

Each of these belongs in the GMP exhibit or contract documents. If a number appears in the budget but not in the contract, you cannot rely on it.

How do you reconcile the GC budget with the designer's estimate?

The most useful review you can run is a line-by-line comparison. ASTM E1804, a practice for reporting cost analysis during design, notes that summarizing estimates in MasterFormat or UNIFORMAT eases comparison with the GC's format, and that reconciliation can be needed at any design phase. The U.S. Government Accountability Office's cost guide treats comparing a point estimate to a reconciled independent estimate as best practice.

In practice:

1. Ask both parties to provide estimates in the same CSI division format.
2. Compare each division and flag differences larger than an agreed threshold, such as 10%.
3. Trace each flagged difference to its cause: a quantity, a unit price, a scope exclusion or an assumption about means and methods.
4. Record the resolution, then carry the agreed numbers into the next milestone.

Most scope gaps appear here, long before they turn into change orders.

What do insurance, bonds and the contractor's fee cover?

Insurance and bond. These are premiums the contractor pays for general liability, builder's risk and sometimes a performance and payment bond. A commentary on construction fees notes that owners often exclude insurance from the base on which the fee is calculated, so the fee is not charged on pass-through premiums. Ask whether the fee applies to insurance and bond costs.

Fee. The fee covers the contractor's overhead and profit. It can be a fixed sum or a percentage of the Cost of the Work. One university's construction-manager template shows a 5.5% overhead-and-profit fee with a 2.5% contractor-managed contingency, which is a single institution's template, not a market benchmark. Practitioner sources describe commercial GC net profit at roughly 5-10%, though those are vendor and trade-blog figures.

What does a construction budget breakdown look like in numbers?

Illustrative example: a GC prices a 40,000 SF two-story medical office building in Phoenix. The figures are invented for the arithmetic and do not represent market costs.

The fee here is computed on the Cost of the Work and contingency, excluding the insurance and bond line, which is a negotiated point. Changing that single clause moves the total.

What should owners question in a GC budget?

Use this checklist at each budget submission.

1. How are general conditions priced, what duration do they assume, and what happens if the schedule extends?
2. Does every specification division have a line, and does the sum tie to the total?
3. What does each allowance cover, and is the amount realistic for the quality you want?
4. Is contingency visible, and who controls it?
5. What is in the fee base, and are insurance and bond included?
6. What markup applies to changes? Read our piece on GC markup on subcontractor bids.
7. How does the budget reconcile to the designer's or independent estimate?

Red flags include a single lump sum for "miscellaneous," a general conditions figure with no staffing detail, an allowance equal to a round number with no scope description, and a contingency that appears in no line at all.

As ever, a published structure is not a price. Costs vary by market and date, so tie decisions to a project-specific estimate.