Controlling Overtime Costs in Labour Management

Overtime looks simple on the surface: a worker stays back for a few extra hours, gets paid more for it, and the order ships on time. But from a cost accountant’s chair, that “extra pay” raises a string of tricky questions. Should the premium be charged to the job that caused it? Should it be spread across all production? Or should it be treated as a loss and kept out of product costs altogether? Getting this wrong distorts costing figures and can quietly eat into profits. Let’s break down what overtime really means in labour cost accounting and how businesses keep it under control.

What overtime actually means 🔗

Overtime is the time a worker puts in beyond the normal working hours fixed by law or by agreement with the employer. In India, this limit is set by the Factories Act, 1948, which lays down that a worker who works for more than nine hours in a day or forty-eight hours in a week must be paid at twice the ordinary rate of wages for that extra time. The Act also defines “ordinary rate of wages” as the basic wage plus regular allowances, excluding bonus and any earlier overtime pay, so the base used to calculate the premium is clearly fixed by statute and cannot be arbitrarily lowered by an employer.

This gives overtime payment two clear parts:

• Normal wages – the amount the worker would have earned for those hours at the regular rate.
• Overtime premium – the extra amount paid over and above the normal rate, purely because the work happened outside normal hours.

This split matters a great deal in cost accounting, because the two portions are not always treated the same way when it comes to charging costs to production.

A quick worked example 🔗

Suppose a worker’s normal rate is ₹100 per hour and the factory operates an 8-hour standard day. If the same worker is asked to work 10 hours because of a rush order, and overtime is paid at double the rate, the numbers look like this:

Notice that the ₹400 paid for overtime hours is not entirely “extra cost caused by overtime.” Only ₹200, the premium portion, is the genuine additional burden. The other ₹200 is simply the normal wage the worker would have earned for those hours anyway. This distinction, explained well by cost accounting practitioners, is the starting point for deciding how overtime should be charged to production.

How the law frames overtime hours 🔗

Cost accountants don’t decide overtime limits on their own; they work within what labour law permits. Besides the wage-rate rule in Section 59, the Factories Act also caps daily working hours at nine and mandates a rest interval of at least half an hour after five continuous hours of work, as detailed in a review of the Act’s overtime provisions. Establishments outside factories, such as shops and offices, are governed by state-level Shops and Establishments Acts, which lay down their own overtime ceilings and rates. Any costing exercise has to work within these legal boundaries; a company cannot simply decide to pay a flat rate for overtime hours to save on the premium.

How overtime premium is treated in cost accounting 🔗

This is the part that usually confuses students, because the “correct” treatment depends entirely on why the overtime happened. Cost accounting practice generally recognises three situations.

This classification, widely used in Indian cost accounting texts and explained in detail by standard costing references, exists to keep cost figures honest. If every job absorbed overtime premium regardless of cause, jobs that had nothing to do with the rush order would end up looking more expensive than they really are, which throws off pricing and profitability decisions.

Why the normal wage portion is treated differently 🔗

The normal wage portion of overtime pay is almost always treated as a direct labour cost (if the worker is doing direct production work) or indirect labour cost (if the worker is on support duties), exactly like any other hours worked. It is only the premium, the “extra” over and above normal pay, that raises questions about which cost centre should bear it. Keeping this distinction clear in cost sheets and job cards is what allows a business to know its true cost of production.

Why overtime happens in the first place 🔗

Overtime isn’t automatically a red flag. A factory that never uses overtime might simply be over-staffed. Genuine, occasional overtime often points to efficient use of the existing workforce. Common triggers include:

• Seasonal demand spikes – festive season orders, year-end targets, or sudden bulk orders.
• Urgent customer deadlines – a client needs delivery earlier than the normal production cycle allows.
• Machine or manpower shortages – insufficient machine hours or workers to complete scheduled production within normal shifts.
• Poor production planning – work bunching up because of scheduling inefficiencies rather than real demand pressure.
• Absenteeism – other workers covering for those who are on leave or absent.

The first two reasons are usually unavoidable and even healthy. The last three are warning signs that something in planning or staffing needs to be fixed rather than papered over with overtime pay.

The hidden costs beyond the wage bill 🔗

Overtime doesn’t just cost extra money in wages. It also affects output quality and worker wellbeing, and these effects eventually show up in the cost sheet too, through rejections, rework, and lower efficiency. Research on working hours and labour productivity, published in a review on the occupational medicine perspective of working hours, found that productivity holds up reasonably well up to about 40 hours a week, but declines once hours stretch well beyond that, largely because of physical and mental fatigue. Extended hours have also been linked to higher rates of absenteeism and a greater chance of errors and accidents on the shop floor.

This is exactly why cost accountants insist on separating and monitoring overtime premium instead of burying it inside the general wage figure. A rising premium bill, tracked department-wise, is often the earliest warning sign of a workforce that is being pushed too hard.

Keeping overtime under control 🔗

Since overtime premium can silently inflate costs if left unchecked, most well-run factories build in a few standard controls:

• Prior authorisation – overtime should never be a worker’s own decision. A works manager or a similarly senior official should sanction it in advance, based on genuine need.
• Separate recording – overtime hours and premium amounts should be recorded department-wise and job-wise, not merged into the general wage sheet.
• Regular review – management should periodically examine which departments are generating the most overtime and investigate whether the cause is genuine or a planning failure.
• Structural fixes for recurring overtime – if a department needs overtime almost every week, that’s a sign to consider an additional shift, more machinery, or additional hiring rather than continuing to pay premium rates indefinitely.
• Linking overtime to output – comparing overtime cost against the additional output or revenue it generated helps management judge whether the overtime was worth it.

These practices are echoed across standard cost control literature, which consistently flags unauthorised or habitual overtime as a drain on profitability rather than a sign of a hardworking factory.

Putting it together in a cost sheet 🔗

For a BCom student solving a costing problem, the practical steps are usually the same: calculate total overtime hours and the premium separately from normal wages, identify why the overtime occurred, and then apply the appropriate treatment, direct to the job, spread as overhead, or written off to the Costing Profit and Loss Account. Getting this sequence right is often what separates a correct answer from a wrong one in exams, and it mirrors exactly what happens in a real factory’s cost office every month.

What do you think? If a factory finds that one department consistently needs overtime every single month, is that really “overtime” anymore, or has it quietly become a permanent part of normal capacity that should be staffed for directly? And should customers who demand rush deliveries always be made to bear the full overtime premium, or does that risk losing them to a competitor who absorbs the cost instead?

References

1. https://indiankanoon.org/doc/1378916/
2. https://www.incometaxindia.gov.in/w/section-59-110
3. https://www.double-entry-bookkeeping.com/costing/overtime-premium/
4. https://www.ijlra.com/details/the-burden-of-overtime-workload-a-double-edged-sword-for-employee-lives-by-s-irfana-ruhaiya
5. https://www.accountingnotes.net/cost-accounting/overtime-premium-of-the-workers-cost-accounting/10301
6. https://pmc.ncbi.nlm.nih.gov/articles/PMC11292309/