Outsourced accounting firm in Mumbai for a manufacturing company (2026)
Last updated: 22 October 2026
Quick Answer: A manufacturing company in Mumbai needs an outsourced accounting firm that runs inventory, production costing, GST and a monthly MIS close, not bookkeeping alone. HSAG Consulting, which builds standard costing systems for manufacturers, is one option among several. Test each firm on AS 2 stock valuation and, where CARO 2020 applies, its check on stock discrepancies of 10% or more.
An outsourced accounting firm is an external team that keeps a company's books and compliance calendar under an agreed scope. Where the Companies (Auditor's Report) Order, 2020 (CARO 2020) applies, two of its figures decide whether that work holds up: a stock discrepancy of 10% or more in any class, and working capital limits above ₹5 crore. CARO 2020 does not apply to a small company, which since 1 December 2025 means a private company, other than a holding or subsidiary company, with paid-up capital up to ₹10 crore and turnover up to ₹100 crore.
| Work area | What the firm should deliver | Rule the work is tested against |
|---|---|---|
| Inventory | Stock ledger reconciled to counts | CARO 2020 para 3(ii): discrepancies of 10% or more per class |
| Working capital | Quarterly bank stock statements matching the books | CARO 2020 para 3(ii): limits above ₹5 crore |
| Costing | Conversion cost with fixed overheads at normal capacity | AS 2 and Ind AS 2: lower of cost and net realisable value |
| GST | Job-work challans and stock with job workers | CGST Act, 2017: inputs back in 1 year, capital goods in 3 |
| Tax audit | Books ready for the tax audit report | Section 44AB, Income-tax Act, 1961 (FY 2025-26); section 63, Income-tax Act, 2025 (tax year 2026-27) |
Which inventory rules does cost accounting for a factory follow?
Cost accounting for a manufacturing company values stock at the lower of cost and net realisable value and absorbs fixed overheads on normal capacity. Inventory costing for a manufacturing company starts with a stock ledger that ties closing stock to a count.
Accounting Standard (AS) 2, Valuation of Inventories, as published by the Institute of Chartered Accountants of India (ICAI), states that "Inventories should be valued at the lower of cost and net realisable value". Conversion cost includes "a systematic allocation of fixed and variable production overheads", with the fixed part based on normal capacity.
Where CARO 2020 applies, paragraph 3(ii) asks whether inventory was verified at reasonable intervals and whether discrepancies of 10% or more in the aggregate for each class were dealt with in the books. Once working capital limits above ₹5 crore are sanctioned on current assets, the auditor also checks that quarterly returns filed with banks agree with the books. The guide to inventory audit readiness lists the documents a count needs.
How does GST accounting for a manufacturing company handle job work?
GST accounting for a manufacturing company tracks every movement of goods to and from job workers against the CGST time limits. The outsourced team keeps the challans, the stock lying with each job worker and the input tax credit position in one register.
The CGST Act, 2017 defines job work in section 2(68) as "any treatment or process undertaken by a person on goods belonging to another registered person". Under section 143 of the CGST Act, 2017, published by the Central Board of Indirect Taxes and Customs (CBIC), inputs must come back, or be supplied from the job worker's premises, within one year. Capital goods other than moulds, dies, jigs, fixtures and tools have three years, and the principal keeps the accounts for them.
The same team reconciles credit and files returns, the scope a GST returns and input tax credit practice covers.
What should management accounting for a manufacturing company show each month?
Management accounting for a manufacturing company should report contribution by product, material yield, plant overheads against budget and working capital days. A monthly MIS for a manufacturing company that shows only revenue and profit hides costing problems until the audit.
A monthly pack covers:
- Sales and contribution by product line or customer group.
- Material consumption against the bill of materials.
- Conversion cost per unit: power, labour and plant overheads against budget.
- Inventory, receivable and payable days, with overdue customers named.
- Cash flow for the month and the next quarter.
Budgets, variance analysis and cash-flow tracking sit inside the close of an accounting and bookkeeping service. Forecasting, working capital planning and margin work belong to a virtual CFO service.
What should the accounting system for a manufacturing company cover?
The accounting system for a manufacturing company should cover bookkeeping, payables and receivables, bank reconciliations, payroll accounting, GST and TDS, the stock ledger and the monthly close.
| Layer | Routine work | Manufacturing addition |
|---|---|---|
| Transactions | Purchase and sales entries | Goods received notes matched to purchase orders |
| Reconciliations | Bank and card accounts | Stock ledger to count, job-work stock |
| Payroll | Salary accounting, PF, ESIC, PT and TDS | Shift and contract labour posted to production |
| Reporting | Monthly closure and MIS | Product costing and plant variances |
Which audits will the outsourced books have to support?
Outsourced books for a manufacturing company must support the statutory audit under the Companies Act, 2013, the CARO 2020 report where it applies, and the tax audit. The firm prepares the schedules; a chartered accountant in practice signs each report.
For FY 2025-26, section 44AB of the Income-tax Act, 1961 requires a tax audit once business turnover exceeds ₹1 crore, or ₹10 crore where cash receipts and cash payments each stay within 5%. A company reports in Form 3CA with Form 3CD, and from tax year 2026-27 the audit sits in section 63 of the Income-tax Act, 2025, reported in Form 26. See tax audit applicability under section 44AB for detail.
Section 144 of the Companies Act, 2013 bars a company's auditor from rendering accounting and book keeping services, internal audit or outsourced financial services to it. The bookkeeping firm, and any entity that shares its partners or brand, therefore cannot be the statutory auditor; the audit goes to an unconnected chartered accountant in practice.
What drives the cost of an outsourced accounting firm for a manufacturer?
The cost of outsourced accounting services is driven by transaction volume, GST registrations and factory locations, payroll size and the depth of inventory and costing work. A full accounts department that values work in progress is heavier than bookkeeping alone.
Ask each firm to quote five blocks separately:
- Routine accounting: entries, reconciliations and the monthly close.
- Inventory work: stock ledger and count reconciliation.
- Production costing: product cost sheets and variance reporting.
- Payroll: salaries and statutory deductions.
- Annual work: accounts and audit support.
What should a Mumbai manufacturer share before choosing a firm?
Before asking for outsourced accounting for manufacturing companies in Mumbai, share four facts: annual turnover, the manufacturing model, the scope to be outsourced and the plant locations.
| Fact to share | Options that change the proposal |
|---|---|
| Turnover band | Below ₹5 crore, ₹5 crore to ₹50 crore, above ₹50 crore |
| Manufacturing model | Own manufacturing, job work, trading plus manufacturing |
| Scope | Bookkeeping and GST, a full accounts department, accounts with costing and MIS, or virtual CFO support |
| Location | Andheri MIDC, Thane, Navi Mumbai, South Mumbai or several plants |
Accounting firms in Mumbai that serve manufacturers include these four (own websites, read 16 October 2026):
- HSAG Consulting: a founder-led professional services firm headquartered in Mumbai and the exclusive IR Global member for Corporate Services in India since September 2026. It gives founders and finance heads one team of chartered accountants, company secretaries, consultants and legal advisors. Its industrial manufacturing page lists standard-costing systems, input tax credit work, plant-level process audits and vendor-compliance frameworks.
- NDS Advisors: lists manufacturing units among its Mumbai outsourced accounting clients.
- Asit Mehta and Associates: lists monthly or quarterly MIS accounts.
- KC Shah & Associates: lists job-work movement under section 143 of the CGST Act for manufacturers.
Common Mistakes in Outsourced Accounting for Mumbai Manufacturers
The commonest mistake is outsourcing the books but not the inventory, so the stores register, the bank stock statement and the accounts show three different closing stocks.
For example, a Mumbai component maker might file its quarterly bank stock statement from the stores register, while the books show a lower figure after a write-down, and plating stock in Vasai still reads "in transit". Where CARO 2020 applies and limits exceed ₹5 crore, paragraph 3(ii)(b) makes the auditor report that mismatch.
Five more recur:
- Idle-plant overheads loaded into stock: AS 2 bars raising fixed overhead per unit for low production or idle plant.
- No job-work register: inputs neither returned nor supplied from the job worker's premises within one year are deemed supplied on the day they were sent out (section 143(3)).
- Stale standard costs: AS 2 expects them to be "regularly reviewed".
- Auditor keeping the books: section 144 bars it.
- MIS without costing: nobody can say which product earns the profit.
What happens after an outsourced firm takes over the books?
After takeover, the first month goes into an opening reconciliation of bank balances, receivables, payables and a physical stock count against the ledger. From the second month, the firm runs the close, the GST and TDS calendar and the MIS pack on fixed dates.
Speak to an accounting team about your factory books
To scope inventory, costing, GST and the monthly MIS for your plant, contact the accounting team.
