Profit (in construction)
Within a unit price, profit is the last major component added after direct cost, indirect costs (overhead) and financing. It is not an actual construction expense but the earnings the contractor expects for performing the work: the return on invested capital, on the risk assumed and on the responsibility of delivering the job. That is why it is not backed by receipts like the other charges, but set as a business decision.
Profit is expressed as a percentage and applied to the sum of direct cost plus overhead and financing. It should not be confused with indirect costs: overhead is made up of real administrative and operating expenses of the project (site superintendent, field offices, insurance), whereas profit is the earnings margin. Both are added as a percentage on top of cost, but one recovers expenses and the other generates the company’s profit.
On public works, profit is a mandatory part of the unit price build-up alongside overhead, financing and additional charges, as required by public procurement regulations. In competitive bids the profit percentage is proposed by the bidder and usually lands between 8% and 15%; on private work the company sets it freely based on the market, the competition and the project’s risk.
The profit percentage is not fixed: it depends on the competition, the type of work, the schedule and the risk. A hotly contested or low-risk job may carry a smaller profit to win the bid; a specialized, urgent or high-uncertainty job justifies a larger margin. On top of that, the contractor must remember that corporate income tax and any statutory profit-sharing are paid on the actual earnings, so the gross margin in the price is not the same as net profit.
Formula
Example
A work item has a direct cost of 1,000, overhead of 15% (150) and financing of 2% on the cost-with-overhead (23), giving a base cost of 1,173. With a 10% profit, 117.30 is added, and the unit price comes to 1,290.30 per unit.
| Item | Unit | Quantity | Unit price | Amount |
|---|---|---|---|---|
| Materials | ||||
| Red clay brick | pza | 42.00 | $6.80 | $285.60 |
| Cement-sand mortar 1:4 | m³ | 0.030 | $2,150 | $64.50 |
| Labor | ||||
| Mason | jor | 0.180 | $520 | $93.60 |
| Laborer | jor | 0.180 | $380 | $68.40 |
| Equipment | ||||
| Small tools 3% | % | — | — | $4.86 |
Frequently asked questions
How is profit calculated in a unit price?
A profit percentage is applied to the sum of direct cost plus overhead and financing. For example, with a base cost (direct + overhead + financing) of 1,173 and a 10% profit, the earnings are 117.30 and the unit price becomes 1,290.30.
What is the difference between profit and indirect costs?
Indirect costs (overhead) are real administrative and operating expenses of the project (site superintendent, field offices, insurance) that are recovered; profit is the contractor’s earnings margin, which rewards risk and investment. Both are added as a percentage on top of cost, but one covers expenses and the other generates profit.
What profit percentage is used on construction jobs?
There is no fixed figure: the contractor proposes it based on the competition, the type of work and the risk. On public works it usually falls between 8% and 15%, while on private work the company sets it freely. Keep in mind that income tax and any profit-sharing are paid on the profit, so net earnings are lower than the gross margin.