Nut Bolt Manufacturing Profit & Loss: Realistic Numbers for a Small Plant

Many entrepreneurs are given unrealistic profit projections — either too optimistic (from machine sellers trying to make a sale) or too pessimistic (from people with no industry knowledge). This guide gives you honest, realistic numbers based on actual plant operating data.

We are modelling a small to mid-size plant making standard MS hex bolts (M8–M16) on one shift, with a mix of semi and fully automatic machines, located in an industrial area with rented shed.

Revenue Model

Production Output

A 4-machine semi-automatic bolt line (wire drawing + cold header + trimmer + thread roller) running one 8-hour shift can produce approximately 300–500 kg of finished bolts per day. We will use 400 kg/day as our base case — a conservative, realistic figure for a new plant that has completed its first 3–6 months.

Cost Breakdown (Base Case — 10,000 kg/month)

1. Raw Material — ₹5.7–6.2 lakh/month (57–60%)

Raw material is by far the largest cost. For 10,000 kg of finished bolts, you need approximately 11,500 kg of MS wire rod (accounting for ~13% process loss). At ₹50/kg for wire rod, that is ₹5.75 lakh per month.

Raw material cost as a percentage of revenue tends to be lower when selling at premium (branded/ISI) prices, and higher when selling as commodity to traders.

2. Salaries — ₹1.1–1.5 lakh/month (11–14%)

8–10 employees for a small single-shift plant. See our staffing guide for a detailed breakdown by role. Salary is your most controllable cost — fully automatic machines reduce this over time.

3. Electricity — ₹35,000–55,000/month (3–5%)

4 bolt-making machines in a small plant consume approximately 20–35 kW of connected load. At ₹8–10 per unit for industrial 3-phase power and 200–250 operating hours per month, electricity costs ₹32,000–55,000/month.

4. Shed Rent — ₹25,000–50,000/month (2.5–5%)

Varies significantly by location. Industrial areas near Ludhiana or Rajkot typically cost ₹20–30/sq ft per month. A 1,600 sq m shed costs ₹32,000–50,000/month at these rates.

5. Machine Depreciation — ₹25,000–40,000/month (2.5–4%)

A ₹20 lakh machine investment depreciated over 7 years gives approximately ₹24,000/month depreciation. This is a non-cash cost but represents the real wear on your machines and the need for eventual replacement.

6. Consumables (dies, oils, packaging) — ₹20,000–35,000/month (2–3%)

Dies wear out and need replacement. Thread rolling dies last 2–5 million strokes depending on material hardness. Heading dies last longer. Budget ₹10,000–20,000/month for dies plus ₹10,000–15,000 for cutting oils, lubricants and packaging.

7. Maintenance and Repairs — ₹10,000–25,000/month (1–2%)

New machines have lower maintenance cost. Budget 1–1.5% of machine value per year for planned maintenance. Unexpected breakdowns add to this, so keep ₹50,000–1 lakh in a repair reserve fund.

8. Miscellaneous (transport, admin, bank charges) — ₹15,000–25,000/month (1.5–2%)

Complete Monthly P&L (Base Case)

How to Improve Your Profit Margin

• Sell directly to contractors and manufacturers — Cutting out the trader middleman adds ₹8–15/kg to your realisation.
• Add ISI/BIS certification — Government-supply certified bolts command ₹15–30/kg premium.
• Run 2 shifts — Fixed costs (rent, depreciation) spread over twice the output. Net margin improves significantly.
• Produce nuts alongside bolts — Higher value per kg, uses the same raw material base.
• Upgrade to fully automatic machines — Reduces per-kg labour cost by 40–60%.
• Bulk buy raw material — Buying 20+ tonnes at once gives 3–5% discount over spot purchases.

Break-Even Point

Your break-even is the minimum monthly revenue needed to cover all costs. In the base case above, total fixed costs (excluding raw material) are approximately ₹3,10,000/month. With raw material at 57% of revenue, your break-even revenue is: