Calculating Profits on Uncompleted Contracts in Contract Costing

Construction firms, shipbuilders, and infrastructure contractors rarely finish a project inside a single accounting year. A metro line or a highway contract can run for three, four, even five years. If a contractor waited until the final handover to record any profit, the income statement would show years of losses followed by one enormous windfall in the final year – a picture that misleads investors, bankers, and tax authorities alike. Contract costing solves this problem through notional profit, a controlled, year-by-year estimate of earnings on work that is still in progress.

What is notional profit 🔗

Notional profit is the provisional profit worked out at the end of an accounting period on a contract that has not yet been completed. It is calculated as the value of work certified minus the cost of that certified work. Work certified refers to the portion of the job that an independent architect, engineer, or surveyor has formally inspected and approved, and it is this certified value on which the contractee usually bases progress payments, as explained in the Institute of Chartered Accountants of India’s costing study material.

Work completed but not yet certified is valued strictly at cost, never at a profit margin, because no external party has verified its quality or extent. This distinction matters: a contractor cannot inflate year-end profit simply by claiming extra progress that the architect hasn’t signed off on.

Why the full notional profit is never booked 🔗

Notional profit is only a snapshot, not a guarantee. Material prices can spike, labour disputes can stall work, and monsoon damage can wipe out months of progress before a contract is finished. Booking the entire notional profit as actual profit would overstate earnings, invite unnecessary tax outgo, and leave the company exposed if the project later runs into losses.

For this reason, accountants follow the prudence principle: only a conservative slice of the notional profit is transferred to the Profit and Loss Account, and the remainder is held back as a reserve against future contingencies, a practice detailed by commerceiets.com’s explanation of contract costing. How large that slice is depends entirely on how far the contract has progressed.

Stage-wise rules for transferring profit 🔗

Cost accounting textbooks classify incomplete contracts into broad completion bands, each with its own formula for deciding what portion of notional profit reaches the Profit and Loss Account.

Work certified below one-fourth of the contract price 🔗

When less than 25 percent of the contract value has been certified, no profit is transferred at all. The entire notional profit stays in reserve, shown as part of work-in-progress on the balance sheet. At this early stage there is simply too much uncertainty about final costs, weather delays, or design changes to justify recognising any earnings, a rule confirmed by AccountingNotes.net’s guide to profit on contracts.

Work certified between one-fourth and half of the contract price 🔗

Once the contract crosses the 25 percent mark but stays below 50 percent, it is considered to have made appreciable progress. A conservative one-third of the notional profit is now transferred, further scaled down by how much cash has actually been collected from the contractee:

Profit to P&L = 1/3 × Notional Profit × (Cash Received ÷ Work Certified)

The cash-received ratio matters because retention money – the portion the contractee deliberately withholds until the contract is complete – should not inflate the profit figure. This adjustment is standard practice, as explained in Taxmann’s overview of contract costing.

Work certified between half and ninety percent of the contract price 🔗

Once a contract is more than halfway done but not yet near completion, risk drops further. Two-thirds of the notional profit is now taken to the Profit and Loss Account, still adjusted for the cash-to-certification ratio:

Profit to P&L = 2/3 × Notional Profit × (Cash Received ÷ Work Certified)

This band, covering roughly the 50 percent to 90 percent completion range, is where most active, healthy contracts sit for the bulk of their execution period, according to Testbook’s breakdown of contract costing rules.

Contracts nearing completion 🔗

Once work certified crosses roughly 90 percent, the approach changes entirely. Instead of relying on notional profit for the year, the contractor estimates the total profit for the whole contract:

Estimated Total Profit = Contract Price − (Total Cost Incurred to Date + Estimated Cost to Complete)

A portion of this estimated total profit is then credited to the Profit and Loss Account using one of a few accepted formulas, most commonly the ratio of work certified to contract price, sometimes combined with the cash-received ratio for extra caution. Both approaches based on work certified are widely used because they tie profit recognition directly to verified progress rather than to unaudited internal estimates.

A worked example 🔗

Suppose a contractor takes up a warehouse project worth ₹6 crore. By the end of the accounting year, the architect has certified work worth ₹3.6 crore – exactly 60 percent of the contract price, placing it in the 50-90 percent band. The cost incurred on this certified work is ₹2.7 crore, and the contractee has paid ₹3.24 crore in cash, having retained 10 percent as security.

Step 1 – Notional profit: ₹3.6 crore − ₹2.7 crore = ₹90 lakh

Step 2 – Cash-to-certification ratio: ₹3.24 crore ÷ ₹3.6 crore = 0.9

Step 3 – Apply the two-thirds formula: (2/3 × ₹90 lakh) × 0.9 = ₹60 lakh × 0.9 = ₹54 lakh

Only ₹54 lakh is credited to the Profit and Loss Account this year. The remaining ₹36 lakh of notional profit stays back as a reserve, protecting the company if costs rise or complications appear before the warehouse is finally handed over.

Losses are treated differently 🔗

Prudence works both ways. If a contract shows an anticipated loss instead of a profit, the entire loss is transferred to the Profit and Loss Account immediately, regardless of how much of the contract is complete. There is no deferral, no reserve, and no stage-wise cushioning for losses – accountants recognise bad news in full the moment it becomes apparent, while good news is recognised only gradually and conservatively.

Why the retained portion matters 🔗

The part of notional profit that isn’t transferred to the Profit and Loss Account doesn’t disappear. It typically appears as a reduction in the work-in-progress value shown on the balance sheet, effectively held in reserve against the contract. As the contract advances in later years and uncertainty reduces, more of this held-back profit is gradually released. This keeps reported earnings smoother and more believable year after year, rather than lurching between artificially high figures and sudden write-downs.

For students, the real value of learning this topic isn’t memorising the fractions. It’s understanding why accounting insists on caution when money hasn’t fully changed hands yet – a principle that shows up again and again across cost and financial accounting, from inventory valuation to revenue recognition on long-term service contracts.

What do you think? If a contractor deliberately delays getting work certified so that it stays just under the 25 percent mark – avoiding profit recognition and tax liability for another year – is that sound conservatism or a misuse of the rule? And with modern construction projects increasingly monitored in real time through digital progress tracking, do you think these decades-old completion thresholds still make sense, or is it time for a more dynamic approach?

References

1. https://live.icai.org/bos/vcc/pdf/Contract_Costing.pdf
2. https://commerceiets.com/calculation-of-profits-in-contract-costing/
3. https://www.accountingnotes.net/cost-accounting/contract-costing/how-to-calculate-profit-or-loss-on-contracts-with-formula/16984
4. https://www.taxmann.com/post/blog/understanding-contract-costing
5. https://testbook.com/question-answer/in-contract-costing-what-is-the-primary-purpose-o–6937e79570d3bf15574167f9