Does a third shift pay for itself?

A third shift pays when the contribution from its output is more than its wage bill plus the extra supervision, power and overheads it brings, and when the one-time setup cost comes back fast enough to justify the effort. On this calculator's defaults, a 40-person night shift earning ₹60,000 of contribution a shift nets about ₹20,400 a shift, or ₹5.30 lakh a month, and pays back a ₹5 lakh setup in under a month. The hard part is making sure the ₹60,000 is real.

How the calculator works

The calculator takes six inputs:

• Contribution from a third shift's output (₹ per shift). What the extra output sells for minus the material, consumables and other costs that rise with every unit. This is not sales value. If you can't sell the extra output, it is zero.
• Workers on the third shift. Everyone you add for the night: operators, helpers and loaders.
• Monthly wage (₹). The average monthly cost of one of those workers.
• Supervision, power and overheads (₹ per shift). The night supervisor, maintenance cover, security, canteen, lighting and machine power for the shift.
• Shifts a month. How many nights you will actually run.
• One-time setup cost (₹). Recruitment, training, lighting, transport arrangements, extra tooling: anything you spend once to start.

The formulas:

Wage cost per shift = workers × monthly wage ÷ shifts a month
Net per shift = contribution − wage cost per shift − overheads per shift
Net a month = net per shift × shifts a month
Payback (months) = setup cost ÷ net a month (shown as "never" if the net is zero or negative)

The calculator assumes the third-shift crew is new money: each worker's whole monthly wage is charged to the shifts they work. If you are moving existing people onto nights rather than hiring, their wages are already paid, and only the night premium and any extra heads count. Enter the wage accordingly.

Worked example (India)

A two-shift auto-component or plastics unit adds a night shift on its bottleneck machines. All values are assumptions for illustration; they are the calculator's defaults.

The headline looks easy. Two checks tell you whether it is safe.

Break-even contribution. The shift's costs are ₹24,615 + ₹15,000 = ₹39,615 a shift. If the night's contribution falls by more than a third, from ₹60,000 to under ₹39,615, the shift loses money.

What if the night runs slower? Night shifts rarely match day output at first: fewer engineers on hand, longer breakdown waits, a newer crew. If the shift delivers 20% less:

A 20% shortfall in output cuts the monthly profit by almost 60%, because the costs stay fixed while the contribution falls. That gearing is the reason to measure your night output for a few weeks before you hire for a full third shift.

What typical numbers look like

• Indian manufacturing has headroom, on average. RBI's latest Order Books, Inventories and Capacity Utilisation Survey, released on 7 October 2026, puts aggregate manufacturing capacity utilisation at 74.6% in April–June 2026 (76.3% seasonally adjusted), down from 77.4% the previous quarter. That survey covers 994 manufacturing companies; a single- or double-shift mid-size plant can sit well below it.
• Night work is less productive. The UK Health and Safety Executive notes that concentration and productivity "tend to decline towards the end of the shifts, following lunch and during the night and early hours of the morning". It gives no single percentage, so plan with your own measured night output.
• Night power is not automatically cheaper. Under the Time-of-Day tariff rules, tariffs in the eight solar hours are 10–20% lower than normal, and peak hours 10–20% higher. Night hours are not discounted by default, so read your own DISCOM's slabs before you fill in the overhead line.
• Night allowance. We found no national statutory night-shift allowance for factory workers. Include whatever you pay in the wage or overhead input.
• Contribution per shift. There is no credible public benchmark. It depends entirely on your product, prices and margins.

What this number does not tell you

• Whether you can sell the output. A third shift on a machine that is not your bottleneck, or in a month when orders are thin, just builds stock. Check the order book first (can your shop take the volume?).
• Whether the first two shifts are already full. If your machines run only part of the day and night shift, a third shift buys hours you already own. The machine utilisation calculator shows how much of today's planned time machines really run. Fixing idle hours on day shift is usually cheaper than adding a night.
• Legal conditions. Under the OSH Code a working day is capped at 8 hours and a worker can't work more than 6 days a week; your state's rules set spread-over, breaks and the overtime ceiling. Women can work night shifts with written consent and prescribed safeguards: transport, lighting, emergency numbers, POSH compliance and, under the Central Rules, CCTV along the way to washrooms and facilities. Your state's rules may add more. See what the 2026 rules expect for women's night shifts and check your state in our state-by-state tracker.
• Wear and maintenance. Running machines 24 hours leaves less time for preventive maintenance, and breakdowns at 3 a.m. wait longer for a fix. The overhead line should include maintenance cover.
• What a camera can and cannot see. A camera can show whether night-shift machines ran, how long they stood and how long a stop waited for someone to fix it. That gives you the real night output to enter here. It cannot tell you what the output is worth or whether a customer will buy it. Where cameras record workers, give them a proper DPDP worker notice.

Related guides

• Running a Third Shift in India: The ₹ Case for Textile and Auto Plants
• Second & Third Shift in India: From Compliance Cost to Revenue
• Second SMT Line or a Third Shift: The ₹ Math
• Before You Buy Another CNC: Prove the Capacity You Already Have
• Absenteeism cost calculator (₹)

FAQ

How do you calculate whether a third shift is profitable? Take the contribution the shift's output earns (sales minus material and other variable costs), subtract the shift's wage cost and its supervision, power and overheads, and multiply by the shifts you run a month. With ₹60,000 of contribution, 40 workers at ₹16,000 a month and ₹15,000 of overheads, a shift nets about ₹20,385, or ₹5.30 lakh over 26 shifts.

How is the payback period calculated? Divide the one-time setup cost by the net profit a month. ₹5 lakh against ₹5.30 lakh a month pays back in about 0.9 months. If the net is zero or negative, the shift never pays back.

Is a third shift better than buying another machine? Often, if the extra volume is moderate and you can staff the night. A third shift uses machines you already own, while a new machine adds depreciation and floor space. It stops being better when night output is much lower than day output, or the volume gap is larger than one night shift can fill.

Is electricity cheaper on the night shift in India? Not by default. The Time-of-Day rules make solar hours 10–20% cheaper and peak hours 10–20% dearer; night tariffs depend on your state commission's slabs, so check your DISCOM's before you budget power.

Can women work on the third shift? Yes, under section 43 of the OSH Code, with written consent and prescribed safeguards: transport, lighting, emergency numbers, POSH compliance and, under the Central Rules, CCTV along the way to washrooms and facilities. Your state's rules may add more, so check them before you plan the roster.

Mama can draw a camera plan for the machines you plan to run at night. Leave an email or phone in the form below.