How to Calculate Construction Overhead and Profit

Your construction overhead and profit margins are two of the most important figures for your business. Yet many construction companies aren’t calculating them correctly, leading to tight budgets, slow business growth, and in some cases, negative bank balances.

If you’ve been in the business a while, you’ll probably have heard of the 10-10 rule; it’s an industry standard for calculating overhead and profit (O & P).

However, overhead and profits vary vastly between different company sizes, project types, and businesses. For example, developers, remodelers, and custom builders all have different cost structures.

On average, construction work can attract a margin of 17-19%, remodeling work 34-42%, and specialty work 26-34%. However, if these figures don’t cover your costs, or they price you out of the competition, they’re no use.

That’s why it’s crucial to accurately calculate your construction overhead costs and profit. Then, you can use these figures to add the right markup and actually make money while staying competitive.

Although adopting the industry standard for overhead and profit calculations is undoubtedly easier, there are three reasons why calculating these numbers yourself is essential to the health of your construction business.

1. Business management

Knowing your actual O & P enables you to run your construction business with confidence. You know how to price jobs, how much work you need to win, and what core requirements your business needs to function.

2. Business growth

Realistic O & P figures help you see where you can allocate money to different resources, such as marketing, hiring, or adding new tools.

3. Business protection

Finally, a proper analysis of your overhead and profits allows you to keep your bank balance in the green. You’ll be able to spot where you’re spending too much money and prevent yourself from under-quoting jobs.

There are many different ways to calculate your overhead and profit, but we’re going to look at the most common methods.

Determine your construction overhead and markup

To calculate your construction overhead, add up the monthly fixed costs of running your business. Some find it easier to add up your annual costs, and then divide by 12 to get your monthly expenses. The resulting figure is the amount of money you must make each month to keep your business alive.

Typical overhead costs include:

• Executive and administrative payroll

• Employee taxes and benefits

• Insurance

• Professional fees such as marketing and accounting

• Occupancy and utility bills

• Telephone and technology

• Vehicle expenses

• Tools and equipment

• Legal and marketing

• Other office expenses

Note that your overhead does not include any direct project costs, such as materials or payroll for field teams or other labor. That’s because you’ll only have those costs if you have work to do.

Once you’ve calculated your monthly overhead, you can determine your markup. This is a percentage to add onto project estimates to cover overhead and keep your projects profitable. There are two different methods of doing this: by labor cost and by sales.

1. By labor cost

To calculate your construction overhead by labor cost, divide your monthly overhead by your monthly labor costs. This figure tells you how much of each dollar goes toward overhead.

Example A:

Let’s use some real numbers as an example. Imagine you have monthly overhead costs of $600 ($200 insurance + $200 utility bills + $200 office supplies) and you’re the only employee. Let’s say you pay yourself $15/hour and work 40 hours/week ($2400/month).

What does this mean? For every dollar you make, $.25 goes straight to overhead.

If you have multiple employees, your overhead percentage will decrease because you’ll be able to spread your overhead across more projects as you take on more work.

Since you have more crew members doing more work, you can afford to spread out your overhead costs across more projects.

Note: This equation just shows what you need to charge on top of projects to cover your overhead fees. It doesn’t include any profit margins you want to incorporate.

Example B:

Let’s say your overhead costs are $600/month and you have 2 full-time employees: yourself and someone else.

With that calculation, you know you should be adding at least 12.5% to your labor costs to cover overhead.

Now, say you get two renovation projects that’ll take around 2 days each.

Using your calculation above, your total overhead markup will be $60 so that you at least break even on costs.

If you take yourself away from the manual work to help with the business side of things, your own labor cost becomes overhead, which increases your overhead markup. Let’s go to example C to demonstrate this.

Example C:

Let’s say you want to shift from billable construction work to office work instead. Your time then shifts into an overhead cost, because it isn’t going into a project with a dollar amount on it.

Your overhead costs include:
$200 insurance
+ $200 utility bills
+ $200 office supplies
+ $1,200 (your own cost of $15/hour x 20/week)
= $1,800/month

Your labor costs are $2,400/month because you pay someone $15/hour for 40 hours/week.

You’d need to hire additional labor to reduce this markup or dedicate your spare 20 hours per week back on-site.

2. By sales

Let’s say you have a full-time team that is paid the same amount every month, but they do different amounts of billable work each month. In this case, you may want to calculate your construction overhead by sales.

To calculate your overhead by total sales, divide your monthly overhead by your average monthly sales. This figure is your overhead markup percentage, which you add to a project estimate based on the cost of that project.

Example A:

In this example, let’s say your overhead costs are $600/month ($200 insurance + $200 utility bills + $200 office supplies). Your sales are $5,000/month. Here’s how you’d calculate your overhead markup:

That means if Project 1 will cost you $1,000, you need to add overhead markup of $120 ($1,000 x 12%).

If you have multiple employees, your average monthly sales will increase, and your overhead markup will decrease because you’ll be able to spread your overhead costs across more projects.

Example B:

Let’s say your monthly costs are the same, but your average sales are $10,000/month.

For the same Project 1 with costs of $1,000, you’d need to add $60 ($1000 x 6%).

It’s also essential to remember that your overhead cost isn’t a one-time calculation. Business expenses can increase as well as decrease, so it’s crucial to re-calculate at least twice a year.

Your profit is the amount of money left over after paying for a project’s costs and overhead. This money can be used to reward yourself or your staff, to reinvest into business growth, or to provide a safety cushion for future losses.

Creating an appropriate profit margin for your business involves a little bit of trial and error with your profit markup.

Note: a profit markup (also known as a profit percentage) is different from a profit margin. A profit markup is a percentage you add to your project costs, to generate a profit margin.

One way to find your target amount is to start adding a reasonable profit figure to your project estimates that reflect your overhead, for example, $50/day. If you’re failing to win projects based on cost, reduce this number until you become successful; if you’re winning projects, slowly increase this figure until you get some pushback on cost.

Once you’ve found and tested the “sweet spot,” you can calculate your profit markup (i.e., the percentage you add to your project costs to create this profit).

To calculate your profit percentage for a project, divide your profit figure by the total sum of overhead, material, and labor costs, and multiply this by 100. This is the percentage of profit you have applied to the project cost.

Example A:

Let’s assume your costs for Project 1 are $900 ($600 labor, $240 materials, and $60 overhead), with a profit of $100.

You can add this percentage to future project estimates to incorporate profit.

To calculate your profit margin for a project, divide your total project estimate by the total project estimate minus the overhead, material, and labor costs. This is the percentage that the profit represents of the overall project estimate.

Example B:

Your Project B estimate is $1,000, with $900 in costs ($600 labor, $240 materials, and $60 overhead).

Figuring out how much time your team spends on certain projects can be difficult to estimate, not to mention non-billable. However, it’s important to ensure your labor costs are accurate so that your overhead and profit calculations are, too.

Construction time tracking software with geofencing capabilities allows you to measure labor and improve the efficiency of your on-site teams. With auto-start and stop based on location, time tracking to each project is accurate and streamlined.

There’s no need to remind your team to punch in, or to have to verify hours after they’ve been submitted.

Hubstaff uses the GPS on your crew members’ mobile phones to know when they’ve arrived at a job site and start the timer. At the end of the day, you’ll get a daily recap of what your crew did emailed to you. You’ll never have to chase down hours or question the time spent at a job site.

Better invoices and estimates

Finally, when you have a clear picture of exactly how long your team spent at a site, it’s easier to invoice clients and estimate future projects.

You can dig into over 17 different reports that help you understand how work gets done and where you can improve processes.

Now that you understand how to calculate construction overhead and profit, you can really start reducing overhead, increasing profits, and growing your business.