Table of Contents

Rate Analysis: What is it, how does it work

All construction projects are subdivided into various activities. With each activity, there are different construction and civil works. Therefore, the total cost of construction works is a combination of all the costs of activities involved.

What is rate analysis?

Rate analysis is the basis for arriving at a correct rate per unit work or supply of work specifications such as labor, materials, and equipment. It can also be defined as the analytical study that leads to the definition of unit rates of work by identifying the basic requirements.

Benefits of rate analysis

There are two significant benefits for carrying out rate analysis of an item. The first is determining the cost per unit item, while the second determines its economic processes and uses.

Importance of rate analysis

Rate analysis gives a well-defined picture of tools, services, and machinery involved in the construction of a project.

Rate analysis helps in proportioning the effect of the market on the payments made for construction work. It also helps in determining the construction costs per unit as stipulated in the specifications. The use of rate analysis makes it possible to come up with uniform standards for construction works.

How do you calculate rate analysis?

Five factors play a pivotal role when calculating rate analysis. These are

  • Material costs
  • Labor costs
  • Equipment costs
  • Overheads
  • Contractor profits

Material costs

When determining the material costs, you need to determine purchase prices, storage prices, transportation costs, and wastages due to excesses. These rates are resolved from the current market rates.

Labor costs

When determining the labor costs, we determine the amount of labor required per unit measurement of a construction project. The numbers are then multiplied by the relevant applicable wages to get the labor costs per unit.

Equipment costs

There are different machinery employed in construction work. If machinery is used for construction work, the cost will be added to the activity cost involved. For instance, we will add a concrete mixer to the cost of preparation of concrete. However, if a machine is used for different types of work, a separate budget is reserved for them.

Overheads

The costs of overheads are also inclusive during rate analysis. These include office, rent, furniture, wages, and contingencies. The charges are about 5% of the overall costs. Taxes are also included in overheads as 6% of taxes have to be paid prior.

Contractor’s profit

A contractor’s profit of about 10% is included in the overall costs in overall project cost. The profit is about 8% in big projects and 15% in small projects.

calculate rate analysis

Examples

Now let us run through some examples to understand the rate analysis of different components of a project. 

Concrete rate analysis

For concrete rate analysis, we need first to organize the data we need for calculations. This includes materials, steel, craft, shuttering charge, and water charge.

We will calculate the rate for 10m3 of concrete. The Cement: Sand and Aggregate ratio is 1:2:4, whereas the density of cement is 1440kg/m3. Below is the detailed table with rate analysis calculations on concrete.

ComponentDescriptionQuantityRate in $Total in $
Materials    
 Aggregate8.8m325 per m3220
 Cement64 bags3.5 per bag224
 Sand4.4m324 per m3108.6
 Steel785kg0.44 per kg345.4
 Binding wires1.5kg0.65per kg0.98
Labor    
 Mason (1st class)45 per day20
 Mason (2nd class)34 per day12
 Casual123 per day36
 Blacksmith83 per day24
Formwork    
 TimberLumpsum1010
 Carpenters102.8 per day28
Wastage 6% 62
Transport 1% 10.3
Contractor’s Profit 15% 154.7
Total$1258.5

Plastering rate analysis

Below we will calculate the plaster rate analysis for a 100m2 area. We will consider a 12mm thick plasterwork with a cement to sand ratio of 1:4.

ComponentDescriptionQuantityRate in $Total in $
Labor    
 Mason (1st Class)6.77 per day47
 Mason (2nd Class)9.24 per day37
 Casual7.54 per day30
MaterialCement9 bags2.8 per bag25.2
 Sand1.25m38.5 per m310.6
Wastage 2% 0.716
Scaffolding 1% 0.358
Transport 1% 0.358
Miscellaneous 2% 0.716
Water charge 1% 0.358
Contractor’s profit 15% 5.4
Total157.38

Labor and material rate analysis

The number of personnel and materials required in a project greatly influence the price of the project. The labor and material units are multiplied by the relevant cost per unit to calculate the appropriate rates. Below is an example of labor and material rate analysis in concrete and brickwork.

ComponentDescriptionQuantityRate in $Total in $
Materials    
 Class 1 bricks25000.05 per brick125
 Class 2 bricks24400.04 per brick100
 Brick ballast6m38 per m348
 Cement64 bags2.7 per bag173
 Steel785 kg0.44 per kg345
Labor    
 1st class Mason45 per day20
 2nd Class Mason34 per day12
 Casual123 per day36
 Carpenter83 per day24
 Blacksmith83 per day24
Total907
material rate analysis

Plumbing rate analysis

Plumbing rates depend on materials location and the plumber’s experience. Below are the average rates for the installation of plumbing fixtures.

ComponentDescriptionQuantityRate in $Total in $
Labor    
 Plumber525 per day125
 Casual75 per day35
Installation    
 Pump installation1550550
 Toilet installation3250750
 Shower2450900
 Bathtub1600600
Total   2960
Total2960

Brickwork rate analysis

Below is the rate analysis for brickwork. We will consider a volume of 10m3 of brick for our calculations.

ComponentDescriptionQuantityRate in $Total in $
Labor    
 Mason (1st class)6.77 per day46.9
 Mason (2nd Class)65 per day30
 Casual113.5 per day38.5
Materials    
 Bricks49400.05247
 Cement21 Bags2.858.8
 Sand2.8m38.523.8
Scaffolding 1% 3.29
Transport 1% 3.29
Miscellaneous 2% 6.59
Water charge 1% 3.29
Contractor’s profit 15% 49.44
Total471.5
FAQ

Frequently asked questions

A proper understanding of rate analysis improves work productivity and eases the cost estimation process. Below are some of the commonly asked questions concerning rate analysis to give a broader scope of the subject.

When is rate analysis important?

A quantity surveyor typically uses price list items from a unit cost database to estimate the rates of a specific work description. However, builders resort to building unit rates as elementary sources of the analyzed rates when this information is not available.

What are the advantages of using rate analysis software?

Rate analysis software allows you to dynamically build rates from elementary sources to calculate total unit rates. The software makes the quantitative evaluation of rates easier through the use of inbuilt mathematical models.

Conclusion

As discussed above, rate analysis is essential in every construction project. You need to be aware of the financial concepts that directly impact your project. After realizing the cost impacts on your projects, you can use the results from rate analysis to prepare a budget and a monthly schedule for your project.