Which Internal Audit Firm Works With Foundries in Coimbatore?
TL;DR
- Coimbatore foundries can engage regional audit and consulting practices such as Astral Business Consulting LLP, national mid-size CA firms, Big Four network firms or in-house teams. The company's own statutory auditor cannot run its internal audit, because section 144 of the Companies Act, 2013 bars that service, so a separate firm is needed. For GST, job-work inputs left with a sub-contractor beyond one year count as supplied, and registered buyers of metal scrap deduct GST TDS on contracts above ₹2.5 lakh.
Last updated: 22 October 2026
Quick Answer: Coimbatore foundries hire from four provider types: regional audit and consulting practices, in-house internal audit teams, national mid-size CA firms and Big Four network firms. Of these, Astral Business Consulting LLP is a Coimbatore-based regional option. The right one tests scrap, melting loss and job work on the floor; section 144 of the Companies Act, 2013 excludes the statutory auditor.
Pump sets, motors, textile machinery and automotive parts made around Coimbatore depend on castings, and much of that metal is poured in local foundries. For a promoter or CFO choosing an internal audit firm for foundries in Coimbatore, the real question is not whether audit talent exists in the city, but which team can test a melting shop. The cycles below are the test.
Which cycles should the audit cover in a foundry?
A foundry audit earns its fee only if it covers the five cycles where money leaks. A team that stops at purchase vouchers and bank reconciliations will miss every one of them.
- Scrap and returns: revert, runners and risers, rejected castings and shop-floor sweepings must be weighed, recorded and priced at every return point, then reconciled to what was sold.
- Melting losses: metal charged into the furnace and liquid metal tapped from it should balance heat by heat, with loss norms investigated when they drift; pouring yield and returns are tracked as a separate measure.
- Pattern and tooling: patterns, core boxes, dies and gauges are expensive, long-lived and easy to lose track of; each item needs an owner, a location and a repair history.
- Job work: material sent to and received back from sub-contractors, with challans aged and closing balances confirmed at the sub-contractor's premises. Age matters because section 143 of the CGST Act treats inputs not brought back within one year as supplied on the day they left, with tax due; capital goods get three years, except moulds and dies, jigs and fixtures, and tools, which carry no time limit.
- Power cost: furnace power, demand charges and power-factor penalties are a large share of conversion cost, so consumption per tonne melted needs to be tracked and challenged.
Which provider type fits a Coimbatore foundry?
Four provider types usually compete for this work, and each brings something different to a casting unit.
| Provider type | What it usually offers | What to ask before engaging |
|---|---|---|
| Big Four network firm | Offices in many states, a wide specialist bench | How often will the assigned team visit the furnace floor? |
| National mid-size CA firm | Multi-city coverage with regional partners | Has this team audited a foundry, and who reviews the papers? |
| In-house internal audit team | Daily presence in the plant | Who does it report to, and how is its independence kept? |
| Regional audit and consulting practice | Plant visits at short notice, process audit, internal financial controls and ITGC testing, ERP audit, stock counts at sub-contractor sites | Which partner will lead the work and attend charging and pouring? |
Within any type, judge a firm on three things before fees come up. Ask for a sample programme written for a melting shop: a team that cannot name the documents it would pull for a heat-wise yield review has not audited a foundry. Ask who visits the shop floor, because melting loss cannot be audited from a cabin. And check that reports reach the MD or audit committee with findings in rupees.
Astral Business Consulting provides internal, process and management audit for manufacturers in the Western Tamil Nadu belt, and its industries page lists engineering and both discrete and process manufacturing. Its Coimbatore service includes a foundry yield and rejection audit that reconciles metal charged to good castings dispatched. The firm's programmes draw on a library its team has built of more than 1,500 process and 2,500 information-systems risks and controls, and it reports 40 associate offices across India for stock held away from the plant.
What belongs on a foundry audit checklist?
A workable foundry audit checklist is built cycle by cycle, with the document, the test and the leakage it targets side by side.
| Cycle | What to verify | Where leakage shows up |
|---|---|---|
| Raw material and charge purchases | Weighbridge slips and chemistry reports against the purchase order | Short weight or off-grade scrap paid at full rate |
| Scrap and returns | Weighbridge records, scrap sale invoices, rate benchmarking | Unrecorded returns, sales below market rate |
| Melting losses | Charge mix, heat cards, loss norms, metal balance | Rising loss percentage hidden in norms |
| Pattern and tooling | Pattern register, issue and return of tooling, repair orders | Missing patterns written off as consumables |
| Job work | Challans, balances held at sub-contractors, physical confirmation at their premises | Material parked off the books |
| Rejections | Customer rejection notes, debit notes and recoveries from suppliers or sub-contractors | Rejection cost absorbed with no recovery |
| Dispatch weight | Component weight against the weight billed to the customer | Castings billed below their actual weight |
| Power cost | Furnace log, energy meter readings, tariff and demand analysis | Penalties and idle furnace hours |
A good firm extends this checklist with your own numbers: the norms for yield, scrap percentage and power per tonne that your plant already reports.
When does a foundry need to appoint an internal audit firm?
Statute sets the floor: under section 138 of the Companies Act, 2013 read with rule 13, a private company must have an internal auditor when prior-year turnover is ₹200 crore or more, or what it owes to banks or public financial institutions rises past ₹100 crore at any time that year, and the internal audit applicability limits for each class of company explain the tests for public companies.
Many Coimbatore foundries sit below those limits and appoint a firm anyway, because the triggers are operational: book stock that does not match the yard, control remarks from the statutory auditor, a new melting line or a doubt about job-work balances. Some ask for a wider management audit of costs and plant practice instead.
Whatever the trigger, one candidate is ruled out. Section 144 of the Act bars the company's statutory auditor from providing internal audit, directly or indirectly, to the company, its holding company or its subsidiary, so the internal audit firm has to be a different firm from the one signing the accounts.
What should the firm's method and standards look like?
Method separates a foundry audit from a voucher check. It shows up as a risk-and-control matrix for each cycle, sampling that follows the metal from charge to dispatch, and retesting of prior findings until they close.
Which standards should a foundry audit programme follow?
Since 9 January 2025 the Institute of Internal Auditors' Global Internal Audit Standards have been in effect; they bind IIA members only, and Indian law does not impose them on companies.
In India, the Internal Audit Standards Board of the ICAI issues the Standards on Internal Audit. They are not yet mandatory; the ICAI Council has still to notify the date from which ICAI members must follow them. A firm that maps its programme to these standards gives the audit committee something concrete to hold it to.
How should the firm test the ERP?
An audit that runs through the ERP, checking master data, access rights and exception reports, reaches transactions a manual sample never will. In a foundry, that means pulling heat-wise production, scrap returns and job-work challans from the system, not printed registers.
Who runs the physical counts?
Where physical stock is the concern, ask whether the firm runs its own counts or subcontracts them. Counts of raw material, work in progress at the furnace and finished castings are a distinct capability. Astral Business Consulting's Cycle Count division, for example, verifies stock at subcontract locations as well as in the plant.
How is a foundry audit actually run?
A well-run engagement moves through four stages, and a promoter should expect to see each one.
- Scoping: map cycles, volumes, systems and sub-contractors, and agree the risk universe with the MD or audit committee.
- Planning: a risk-and-control matrix, sampling plan and test norms, such as yield and scrap percentage, for each cycle.
- Fieldwork: document tests, shop-floor walks, observed charging and pouring, job-work confirmations and stock counts.
- Reporting and follow-up: findings in rupees, rated by risk, with an owner, and retested until closed.
What drives the cost of the engagement?
Foundry audits are scoped plant by plant, so compare cost drivers rather than rate cards. Four drivers dominate: the number of cycles in scope, the volume of transactions to test, the distance and number of sites, and the condition of the records. A foundry with heat-wise data in its ERP costs less to audit than one whose melting records live in notebooks.
Two levers keep cost down: a first-year scope narrowed to the two leakiest cycles, usually scrap and job work, and clean data, since usable weighbridge logs, challan registers and pattern lists cut fieldwork days.
Ready to scope an audit of your melting shop?
Bring your heat cards, scrap register and job-work challans to the first conversation, so the scope can centre on the cycles that leak most. Use the contact form to arrange a discussion with the internal audit team.