The Procedure of Contract Costing: A Detailed Guide

A flyover, a metro corridor, or a multi-storey residential tower can take years to complete and involve crores of rupees. Neither the client nor the construction company can wait until the very last brick is laid to settle accounts. This is exactly why contract costing follows a clearly defined procedure – a sequence of steps that governs how a contract is awarded, how money changes hands as work progresses, and how every rupee of cost is tracked until the final profit or loss is known. Once you understand this procedure, terms like work certified, retention money, and notional profit stop feeling like jargon and start making practical sense.

The agreement between contractor and contractee 🔗

Every contract begins with two parties: the contractor, who agrees to execute the work, and the contractee, the client who wants the work done. For most sizeable projects, the contractee does not simply hand the job to the first bidder. Instead, tenders are invited from several contractors, each of whom submits a quotation covering the estimated cost, the timeline, and the proposed method of execution.

Once the contractee evaluates these tenders – comparing price, reputation, and technical capability – one bid is accepted, and a formal agreement is signed. This document is far more detailed than a simple price quote. It typically fixes the contract price, the payment schedule, the timeline for completion, penalty clauses for delays, and, for long-duration contracts, an escalation clause that protects the contractor against a sudden rise in material or labour costs during execution, a point covered in detail in academic notes on contract costing.

Where the architect fits in 🔗

For construction and engineering contracts, a third party is usually brought into the picture: an architect, surveyor, or engineer appointed by the contractee. This person is not just a designer. Their real job in the costing procedure is supervision – inspecting the site periodically, confirming that work matches the agreed specifications, and later certifying how much of the contract has actually been completed. Because payments depend directly on this certification, the architect effectively becomes the gatekeeper between work done and money released, a role explained well in resources on the features of contract costing.

Progress payments and the architect’s certificate 🔗

Large contracts are rarely paid in a single lump sum. If a contractor had to wait years for one final payment, working capital would run out long before the project finished. To solve this, the contract typically allows for progress payments – instalments released as the work advances.

Here is how it works in practice. At agreed intervals, the architect inspects the site and issues a certificate stating the value of work completed so far. This is called work certified. Based on this certificate, the contractee releases payment to the contractor. Work that has been carried out but not yet inspected or approved is called work uncertified, and it is valued strictly at cost, without adding any profit margin, as outlined in this tutorial on contract costing.

Understanding retention money 🔗

Here is a detail that trips up a lot of students: the contractee almost never pays the full value of the work certified. A portion, typically somewhere between 10% and 20% depending on the terms of the agreement, is withheld as a safeguard. This withheld amount is called retention money, and it protects the contractee if defects surface later or if the contractor fails to meet the remaining terms of the contract, a mechanism described in detail by Finance Strategists’ explanation of contract costing.

The retained amount is not lost to the contractor. It is released once the project is fully complete and any defects identified during the defect liability period have been rectified to the contractee’s satisfaction, as noted in the same discussion of contract accounts.

Recording costs through the contract ledger 🔗

Because a single contract can run for years and involve dozens of cost items, every contract is given its own distinct number, and a separate contract account is opened for it in the contractor’s books. This is not optional bookkeeping neatness – it is the only way to know whether a specific project is profitable, especially when a firm is running several contracts simultaneously, as emphasised in study material on contract costing procedure. Nearly every major cost head connected to the site is debited directly to this account rather than being estimated or apportioned, which is one of the features that makes contract costing simpler than other costing methods.

Materials 🔗

Materials bought specifically for a contract are charged directly from the supplier’s invoice. If materials are instead drawn from the contractor’s central store, they are recorded through material requisition notes and charged to the contract at that point. Any material that goes unused and is returned to the store is credited back to the contract account, keeping the cost record accurate at every stage.

Labour 🔗

Site labour is almost entirely direct cost, since workers are usually engaged specifically for that one project. Wages paid, along with any wages accrued but unpaid at the end of a reporting period, are recorded against the contract to ensure the labour cost reflects work actually done, not just cash actually paid.

Direct expenses 🔗

Beyond materials and wages, a contract usually attracts its own set of direct expenses – sub-contractor charges for specialised work like electrical fitting or welding, architect’s fees, site insurance, and hire charges for specific equipment. These are treated as direct costs and debited straight to the contract account, a classification explained in lecture notes on contract costing.

Overheads 🔗

Not every cost can be traced to one project so neatly. Head office administration, central supervisory staff, and shared office expenses cannot be linked to a single site, so they are classified as overheads and apportioned across all running contracts using a fair basis such as direct wages, labour hours, or direct cost, an approach detailed in study material on cost and management accounting. Because direct costs dominate a typical contract, overheads usually form a fairly small slice of the total.

Plant and machinery 🔗

Equipment costs are handled in one of two ways, depending on how the machinery is used. If a plant is bought specifically for one contract and will stay at the site until the work ends, the full cost of the plant is debited to the contract account, and its written-down value is credited back either at year-end or on completion. If the same plant is shared across several contracts or used only briefly at a site, only the depreciation or hire charges relevant to that period are debited instead, as explained in the detailed breakdown of contract costing elements. This distinction matters because charging the wrong method can seriously distort the reported cost of a contract.

From cost records to profit calculation 🔗

Once materials, labour, direct expenses, overheads, and plant costs are all recorded in the contract ledger, the contractor can compare total cost incurred against the value of work certified. For contracts still in progress, this comparison produces a notional profit, only a portion of which is prudently transferred to the profit and loss account, with the rest held back as a reserve against unforeseen costs later in the project. This cautious, staged approach to profit recognition is precisely why the procedure – agreement, certification, ledger recording, and periodic profit assessment – matters so much in contract costing.

What do you think? If you were a contractor negotiating a three-year infrastructure project, would you push for a lower retention percentage or a shorter defect liability period, and why might a contractee resist that request?

References

1. https://gcderabassi.ac.in/e-learning/CONTRACT%20COSTING.pdf
2. https://www.geektonight.com/contract-costing/
3. https://www.vskills.in/certification/tutorial/contract-costing/
4. https://learn.financestrategists.com/explanation/cost-accounting/material-costing/contract-costing/
5. https://www.financestrategists.com/accounting/cost-accounting/material-costing/contract-account/
6. https://umeschandracollege.ac.in/pdf/study-material/accountancy/CONTRACT-COSTING-with-illustration.pdf
7. https://scholar.oauife.edu.ng/tjayoola/files/lecture_notes-2_contract_costing.pdf
8. https://sajaipuriacollege.ac.in/pdf/commerce/Study_Material_on_CMA.pdf
9. https://www.economicsdiscussion.net/cost-accounting/contract-costing/32597