Contractors control revenue tightly. Margin leaks during execution.

Most contractors control revenue hard. Margin during execution has no equivalent control, only the books, which show what was made after the work is done. With margins this thin, the small leaks on site decide how a project ends.

Watch how a mid-size contractor handles revenue. The tender is priced line by line and reviewed before it goes out. The MD signs off the bid. Once work starts, the bill goes in every month, on schedule.

Then watch what happens to the margin priced into that tender over the next eighteen months of execution. Mostly, nobody watches it until the accounts close. The books tell you what the project made, weeks or months after anything could have been done about it.

Margins are thin enough that small leaks decide the result

Construction runs on margins that leave little room:

• India: ICRA puts the operating margin of construction companies at 10.7% for the first nine months of FY2026, and expects it to slip to 10.1–10.6% in FY2027, citing heavier competition, volatile raw material prices and higher working capital needs (ICRA, March 2026).
• UK: across the Top 100 construction companies, the average pre-tax margin was 2.4%, and 43 of them reported less than 2% (The Construction Index, data from Company Watch).

On a 10% margin, a leak worth 1% of contract value takes a tenth of the profit. And the leaks are measurable: Dodge Construction Network's 2024 study of US and Canadian contractors found that coordination problems alone cost them an average of 10% of their annual profit margin (Dodge, Not by Design).

Execution margin has only the books

Revenue gets the strongest controls a contractor has. Execution margin gets the accounts: costs booked as invoices arrive and reconciled at month-end.

On infrastructure projects, that reconciliation is hard work, because the project is spread out over kilometres:

• Subcontractor invoices: checking one means confirming what work was done, at which chainage or location, and whether it was already paid for last month.
• Deliveries: they arrive all month, from many vendors, at different points along the project, and on government works the royalty documents for materials such as sand and aggregates have to be kept with them.
• Fuel: refills happen across dozens of machines working at different locations.

Rebuilding all of that from challans, registers and WhatsApp photos at month-end is slow. Anything that can't be reconciled is either paid on the vendor's numbers or held up in a dispute.

By the time a leak shows up in the books, the event behind it is weeks old: the notice window has closed, the vendor has been paid, the crew has moved on. The books record a leak; they can't stop one.

Even money that comes back costs you

Some leaks lose money outright: fuel wasted, an entitlement time-barred. Many others only delay it. The work gets billed next month, the delay gets argued out, the vendor dispute settles. But late money costs a contractor in two ways, and both come straight out of margin:

• Working capital stays blocked. Work already done has to be funded until it's paid for, and for many contractors that funding is borrowed. In one rating rationale this year, CRISIL found an infrastructure contractor's gross current assets had stretched to 307 days, from 86 days two years earlier, mainly because government receivables were slow, with "increased reliance on bank borrowings to support working capital requirements" (CRISIL Ratings, July 2026).
• Bank guarantee charges keep running. A performance guarantee usually has to stay in force until the works are complete and defects are remedied (FIDIC 2017, Sub-Clause 4.2), and the bank charges commission for as long as it's outstanding: between 1.6% and 2.6% a year on performance guarantees above ₹1 crore at Punjab National Bank, depending on the borrower's rating (PNB service charges). A project that runs late keeps its guarantees, and their charges, open for longer.

The arithmetic is unforgiving. At an illustrative borrowing cost of 10% a year, a bill paid one month late costs about 0.8% of its value in interest: roughly a twelfth of a 10% margin on that work, gone even though nothing was lost.

Five places margin leaks during execution

1. Work done that slips into next month's bill

Every monthly bill is raised against scoped quantities: the BOQ on an item-rate contract, or the billing break-up on an EPC or lump-sum contract. Billing teams plan for it: at the start of the month, they list the work expected to finish and track it towards the bill.

Site execution rarely follows that plan. Planned work doesn't finish on time, and unplanned work creeps in. So work done reaches the bill only if the tracker keeps up with the site all month: its quantity captured and matched to the right line, and its checklists, measurements and photos collected before the cut-off. Miss any of those, and the work rolls into next month's bill.

The work isn't lost, but the money comes in a month later, with the interest cost above. As the CEO of a specialty contractor told us: "Even the BOQ claims that get approved still roll into the next month; recognising that revenue takes three to four months end to end." ICRA notes the sector's cash conversion cycle lengthening in both FY2025 and FY2026.

More on the chain from site to bill in our BOQ guide.

2. Blockers that turn into delays

A drawing is awaited, a work front isn't handed over, a material runs short. It's reported in the site WhatsApp group, everyone sees it, and nobody owns it. A few days later it's a delay, with crews and plant standing idle and overheads running. Enough of those, and the project finishes late: more months of site overheads, bank guarantees held open longer, and the final bill further away.

Most of these are commitments that slipped: a revised drawing promised by Thursday, a front promised for Monday. Tracked to an owner and a date, they get chased while they can still be fixed. (See our guide to managing site commitments on WhatsApp.)

Many of those commitments aren't the contractor's to keep. The drawing is the architect's, the work front is the client's to hand over, the approval sits with the client's engineer. The contractor can't make them happen faster, but delays caused by the employer's side usually carry a right to more time, and sometimes money. That right depends on the delay being recorded as it happens and notified within the contract's deadline. Miss that, and a delay the contractor didn't cause becomes one it pays for (see leak 5).

3. Deliveries that lose their trail

Every delivery gets checked when it arrives: the challan, the weighbridge slip, the load. That isn't the problem. The problem is what happens next. The delivery becomes one event among dozens in the day's work, recorded across a gate register, a photo in the site WhatsApp group and a message from the store.

By month-end, someone has to rebuild the trail: which vendor sent what, from which source, on which day, to which location. When the vendor's bill arrives, a delivery that can't be traced gets paid on the vendor's numbers or disputed. On government works, the source matters to the contractor's own bill too. Royalty on minor minerals such as sand and aggregates is often deducted from the contractor's bills unless it can show the royalty was already paid at source. Rajasthan's circular, upheld by the Supreme Court in 2016, deducts it at 1.75% of the bill on road works, refunded only on production of the royalty receipts (State of Rajasthan v. Deep Jyoti Company). A delivery without its source papers is money held back until the trail is rebuilt.

4. Fuel that isn't checked against the work

On road and infrastructure work, fuel is a cost line the size of the margin itself. When the Ministry of Road Transport and Highways compensated contractors for this year's diesel price rise, it assumed the fuel and lubricants component at 10% of the value of work, "in line with EPC contracts" (MoRTH circular NH-24028/03/2026-H, 17 June 2026). That's about the same as the sector's entire operating margin.

Much of that fuel goes into moving material, not placing it. On a linear project, aggregates, cement and steel are stocked at a central store or plant and hauled out to the working chainages, and the trip gets longer as the work moves away from the store. In hilly terrain it's slower and steeper, so every trip burns more fuel. A trip to the wrong location, a half-empty load or a vehicle waiting at a front that isn't ready costs fuel all the same.

If fuel issued isn't checked against the trips made and the work the equipment actually did, nobody can tell what was used well and what was wasted until the month's diesel bill arrives.

5. Claim entitlements lost to a missed notice

Delays caused by the employer's side, and other events the contract puts at the employer's risk, usually entitle the contractor to more time and sometimes to additional payment. But only if notice goes in on time. Under FIDIC 2017, a claim notified more than 28 days after the contractor became aware of the event loses both the extension and the additional payment (Sub-Clause 20.2.1). Under CPWD GCC 2023, the request for an extension is due within 14 days (Clause 5.4).

Miss the deadline, and the contractor loses twice: the cost of a delay it didn't cause isn't recovered, and the delay counts against it, with liquidated damages to follow. On CPWD works, compensation for delay runs up to 1% a month, capped at 10% of the tendered value (Clause 2): the same size as the margin.

Teams usually know to raise the obvious delays. What slips is the deadline once the site moves on, and the clauses nobody has top of mind. More in our EOT guide.

What execution-time margin control looks like

Each of these leaks has a window: the bill cut-off, the commitment date, the vendor bill, the notice deadline. Control during execution means catching each one inside its window, the same week rather than at month-end, and putting it in front of the person who can act. Caught in time, the money comes in when it should; caught late, it comes in eventually, with interest and guarantee charges paid on the wait.

The information is already there. Every one of these leaks shows up first in the updates site teams send every day: the quantity reported, the blocker raised, the challan photographed, the hindrance mentioned. What's missing is anything that reads those updates commercially, as they arrive.

A useful test for an MD or PMO head is to ask, every week:

• Is all the work done this month going into this month's bill, with its proof?
• Which blockers are open, who owns each one, and by when?
• Can we trace every delivery this month by vendor, source and date, before the vendor's bill arrives?
• Does the fuel issued match the trips made and the work done?
• Which contract deadlines are running on each project?

If answering those takes a round of calls to every site, margin is leaking somewhere you can't see.

Where Velora fits

Velora reads the WhatsApp groups your site teams already use and turns their updates into records your team can act on:

• Field Intelligence: blockers and commitments tracked to closure with follow-ups on WhatsApp, and deliveries logged by vendor and date.
• Billing Intelligence (early access): work done captured as it's reported, including work that wasn't on this month's tracker, matched to your project scope, whether a BOQ or a billing break-up, and substantiated with checklists and site photos, so it's raised in this month's bill.
• Contract Intelligence (early access): EOT notice deadlines tracked, with reminders before the window closes, and contract implications flagged with the likely clause and the proof.
• Portfolio Intelligence: all of it across every project in one view, so the MD and PMO head can answer the weekly questions above without calling every site.

Our team is working on fuel. Velora flags; your team decides what to raise and when.

Frequently asked questions

What is a typical profit margin for construction companies in India?

ICRA put the operating margin of Indian construction companies at 10.7% for the first nine months of FY2026, and expects 10.1–10.6% in FY2027, citing competition, volatile raw material prices and higher working capital needs. In the UK, the average pre-tax margin across the Top 100 construction companies was 2.4%.

Why do construction projects lose margin during execution?

Mostly through small leaks that nobody catches in time: work done that slips into next month's bill, blockers that turn into delays, deliveries that can't be traced by vendor and source when the bill arrives, fuel that isn't checked against the work done, and claim entitlements lost to a missed notice deadline. The books show the result only after the fact.

How do billing and project delays cost a contractor money if the payment comes in eventually?

Late money is expensive. Work already done has to be funded until it is paid for, often with borrowed working capital, so interest runs for every day of delay. And when a project runs late, its performance bank guarantees stay outstanding longer, with the bank charging commission on them throughout. At an illustrative 10% a year, a bill paid a month late costs about 0.8% of its value in interest.

How can contractors protect margin during a project?

Catch each leak inside its window: the bill cut-off, the commitment date, the vendor bill, the notice deadline. That means reading site updates commercially as they arrive, and putting each issue in front of the person who can act that week, not at month-end.

How much of a highway project's cost is fuel?

For price adjustment, India's Ministry of Road Transport and Highways assumes the fuel and lubricants component at 10% of the value of work, in line with its EPC contracts (circular NH-24028/03/2026-H, June 2026). That is about the same as the sector's average operating margin.