Common production methods have a very simple costing methodology, the final price of units produced are made up of various costs incurred in the production, plus the profit. This process is used to cost out singular products, in a production process. However there are some projects where the product in itself is one huge project, such as research and development project, construction project, or mammoth projects, such as plant installations. Such one time projects however have a different approach of costing. The cost and profit of the project is basically ascertained in a different manner, which is known as percentage of completion which, in some cases, is also expressed as PoC. The basic principles of cost accounting are also followed in this method of accounting, however timeline and treatment of cost is a bit different. Percentage of Completion: Formula This is basically a part of the revenue recognition concepts of the International Financial Reporting Standards (IFRS). The premise which qualifies a said project needs to be a one unit project such as a construction project. The transaction between the project giver and the party executing the project is conducted on the basis of this formula. The general formula for the method goes as follows: Cumulative revenue (Percentage of Completed Method Cost) = Cost Incurred to Date x Contract Price/ Total Estimated Price of the Contract...(General Formula) This formula, however, is quite impractical as it does not tell us anything about the completion percentage of the project. Hence in construction, there is a detailing of the cost that is used: The first step to computation is ascertaining the percentage of completion, the formula goes as follows: Percentage completed (%) = Costs Incurred (to date) / total estimated or allocated cost of production x 100...(1) In some cases, cost is not used as it can give a certain misleading image, hence time is use as the ascertaining element. Further more, some companies also derive the two percentages and simultaneous consider both. Next step is of gross profit. Gross profit (till date) = percentage completed x total estimated gross profit...(2) Current Year's Gross Profit = Total Gross Profit (till date) - Prior Gross Profit...(3) If the project is a contract from one party to another then either the general formula is utilized to conduct periodic payment, or the formula (1) is used. The usage of the formula differs as per the subject and context of use. There are several detailed provisions and adjustments such as inflation and profit addition or extra material acquisition costs, which are further considered. Example of Percentage of Completion Method Here's an example to further illustrate the method. Case 1 Ascertainment of payment from party 1 to 2 is done on the basis of the general formula.

1. Cumulative revenue (Percentage of Completed Method Cost) = Cost Incurred to Date x Contract Price / Total Estimated Price of the Contract
2. Cumulative revenue = $20,000 x $100,000 / $80,000 = $25,000

Case 2 The cost and completion of cost is ascertained.

1. Percentage completed (%) = Costs Incurred (to date) / total estimated or allocated cost of production x 100
2. Percentage completed (%) = 30,000 / 120,000 x 100 = 25%
3. Gross profit (till date) = percentage completed x total estimated gross profit
4. Gross profit (till date) = 25 / 100 x 200,000 = 50,000
5. Current Year's Gross Profit = Total Gross Profit (till date) - Prior Gross Profit
6. Current Year's Gross Profit = 50,000 - 20,000 = 30,000

The job cost sheets of such a project is known as a tender proposal. The remaining cost accounting concepts such as overhead costs are the same. The application of percentage of completion formulas differs from case to case. The completion of project is obtained after the final computation at the end of the project. There are several computations and modifications in this formulas that are integrated to suit a situation.