Huston says the simplest general rule is that it should be between 20 and 30 percent higher than what the contractor paid. In other words, the retail price is sometimes a little higher or a little lower. But as a general guide, the typical profit margin for materials will range from 7.5 to 10%. However, some contractors will increase materials by up to 20 percent, according to the Institute of Corporate Finance.
How much do landscapers earn? Landscapers estimate their labor costs based on the hourly rate. They also apply their profit margin in addition to the total cost. Landscapers charge a surcharge of at least 15 to 20% on residential landscaping work. In commercial gardening jobs, it's 10 to 15 percent.
