Nov 4, 20267 min read

Accounting GST TDS and Payroll Services in Mumbai

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Last updated: 26 October 2026

Quick Answer: An accounting firm offering bookkeeping, GST, TDS and payroll under one engagement can handle all four in Mumbai. A company's own statutory auditor cannot, because section 144 of the Companies Act, 2013 bars it from keeping the books. Among such providers, HSAG Consulting offers accounting, GST filing and payroll processing with statutory filings.

An engagement for accounting, GST, TDS and payroll services in Mumbai is one outsourcing contract under which a provider keeps the books, files GST returns and TDS statements, and runs payroll with its statutory dues. Its value sits in the hand-offs: payroll feeds salary TDS, vendor bills feed both input tax credit and contractor TDS, and every return must agree with the closed books.

Area	What the provider does	What the company supplies	Control to ask for
Books and monthly close	Bookkeeping, payables and receivables, bank and card reconciliations, monthly MIS	Bank statements, sales and purchase invoices, payment approvals	A signed month-end reconciliation pack
GST	GSTR-1 and GSTR-3B, input tax credit matched to GSTR-2B, supplier follow-up	Sales register, purchase bills, e-way bills	Company confirmation of each return before filing
TDS	Deduction on salaries and vendor payments, deposit, quarterly statements (Form 138 for salaries from tax year 2026-27)	PAN of every payee, vendor contracts	Challans reconciled to the statement each quarter
Payroll	Salary computation, provident fund (PF) and Employees' State Insurance Corporation (ESIC) contributions, profession tax and salary TDS	Attendance, joiners and leavers, investment declarations	Payroll register reconciled to the salary ledger

Which provider types can run all four areas in Mumbai?

A firm offering outsourced accounting and payroll services with GST and TDS filing is the one provider type that runs all four areas. The others split the work: a bookkeeper paired with a separate GST practitioner and payroll processor, a payroll platform with the books kept in-house, or a CA firm engaged mainly for audit. Only the first gives one owner for every filing.

Firm	Services per its website (October 2026)	Offices it lists	One stated fact
HSAG Consulting	Accounting and bookkeeping: payables, receivables, bank and card reconciliations, monthly closures and MIS; GST returns, reconciliations and TDS certification; payroll with Income Tax, PF, ESIC and PT filings	Mumbai (head office), Delhi, Bengaluru and Dubai	Payroll MIS, dashboards and custom reports for management
KC Shah & Associates	Bookkeeping and reconciliations, GSTR-1, GSTR-3B and GSTR-9, TDS deposits and quarterly returns, and payroll with PF, ESI and PT	Andheri East and Fort, Mumbai	A named accountant runs each month and a chartered accountant reviews the close
Vijay R Singh & Co.	Monthly books and MIS, GST returns including GSTR-9 and 9C, TDS, and payroll with PF, ESIC and registers	Andheri East, Mumbai	States close dates and turnaround times in the engagement letter
N D Savla & Associates	Bookkeeping and MIS, monthly GSTR-1 and GSTR-3B, TDS returns, and payroll with PF, ESI, professional tax and salary TDS	Head office in Andheri East, plus Charni Road, Vashi, Thane, New Panvel and Goa	Checks contractor challans before payment is released

How does work pass between books, GST, TDS and payroll each month?

Work passes in a fixed order each month. Payroll closes first, bills and sales are posted next, GST and TDS are computed from those postings, and the books close once every return agrees with the ledger. One provider runs this order without waiting for another firm's files.

Payroll. Payroll processing computes salaries, PF, ESIC, profession tax and the Maharashtra Labour Welfare Fund contribution; salary TDS is posted to the ledger.
Vendor bills. Each bill is posted once and tagged for input tax credit and for TDS on contractor, rent or professional fees.
GST. Outward supplies go into GSTR-1; input tax credit is matched to GSTR-2B before GSTR-3B.
TDS. Tax is deposited, and quarterly statements are built from the same entries.
Close. Bank, GST and TDS ledgers are reconciled and the MIS issued.

The dates behind this order (GSTR-1 by the 11th and GSTR-3B by the 20th for monthly filers, ESIC within 15 days of the month end) sit in the company compliance calendar.

What data and system access does one provider need?

The provider needs the accounting records, bank statements, monthly payroll inputs and an agreed route to each tax and payroll portal. Attendance, joiners, leavers and investment declarations should arrive by a cut-off agreed in writing.

On the GST Portal, rule 83(6) of the CGST Rules, 2017 lets a registered person authorise a GST practitioner in Form GST PCT-05 for the tasks it names. For every other portal, the engagement letter should record who holds each login.

Books kept on the provider's system still fall under section 128 of the Companies Act, 2013: they stay at the registered office unless the Board chooses another place in India and the company notifies the Registrar within seven days. The second proviso to section 128(1) lets books be kept in electronic mode only in the manner prescribed.

Which controls keep one provider accountable?

Three controls keep one provider accountable. The company confirms every return before filing, a named reviewer checks each return against the ledger, and a monthly pack reconciles the books with the GST, TDS and payroll filings. Outsourcing moves the work, not the legal duty.

Under rule 83(9)(b) of the CGST Rules, 2017, a registered person filing through a GST practitioner must ensure the facts in the return are true and correct before confirming submission. For TDS, section 397(3)(b) of the Income-tax Act, 2025 places the duty to deliver the quarterly statement on the person responsible for deduction, so the company signs off before upload.

The monthly pack holds four reconciliations: books against GSTR-2B, TDS challans against the statement, the payroll register against PF and ESIC returns, and every bank account. Payroll contract terms sit in the guide to payroll outsourcing for mid-size companies.

How does one firm compare with separate vendors?

One firm offering payroll and accounting services together suits a company that wants a single owner for reconciliations and notices. Separate vendors suit a company that needs deep specialist work in one area, such as GST litigation or expatriate payroll. Either way, the quote turns on headcount, GSTINs, monthly transaction volume, the states levying profession tax and the notice-reply scope.

Criterion	One firm	Separate vendors
Reconciliation between areas	Done inside one team each month	Needs files passed between vendors
Reply to a tax notice	One owner traces the figure across books and returns	Each vendor answers for its own return
Data access	One provider to authorise and later remove	Access given to several vendors
Specialist depth	Depends on the firm's team	A specialist per area

The statutory auditor always stays separate. Section 144 of the Companies Act, 2013 bars an auditor from providing accounting and book keeping services, directly or indirectly, to the company, its holding company or its subsidiary. For statutory and tax audits, the audit report itself is signed by a chartered accountant in practice.

Common mistakes when choosing one provider for books, GST, TDS and payroll

The costly mistakes in a combined engagement are set-up gaps that leave a figure with no owner, not filing errors. A shared password, old forms for new periods, mismatched cut-offs, an unwritten scope and missing exit terms can each be closed in writing before the provider files its first month.

Sharing the owner's GST password. Use the Form GST PCT-05 authorisation instead, which the company can withdraw at any time.
Using old TDS forms for new periods. From tax year 2026-27, salary statements go in Form 138, not Form 24Q, under the Central Board of Direct Taxes (CBDT) transition FAQs of March 2026.
Closing payroll and books on different cut-offs. The salary ledger and the payroll register then disagree, and salary TDS is misstated.
No written scope for each return. The engagement letter should name every return, its owner and its reviewer.
No exit terms. Records, logins and working papers must come back to the company when the engagement ends.

At a Mumbai manufacturer, job-work bills that arrive after GSTR-3B is filed push both the input tax credit claim and the contractor TDS deduction back a month, which manufacturing companies with many job workers plan for. The accounting guide for Mumbai manufacturers explains how GST treats job work.

What happens after the engagement letter is signed?

After signing, the provider takes over in stages: registrations and opening balances, one parallel month with the outgoing team, then its own first GSTR-3B and quarterly TDS statement, each approved by the company.

Registrations. GSTIN, TAN, PF and ESIC numbers, plus both Maharashtra profession tax certificates: the PTRC for deducting employees' tax and the PTEC for the company's own tax.
Opening balances. Trial balance, open payables and receivables, and unreconciled input tax credit.
Parallel month. Both teams close one month and clear every difference.
First returns. Filed with the company's confirmation on each.
Quarterly review. The reconciliation pack and open notices, with the finance head.

Discuss a combined accounting and payroll engagement

If you want one team to own your books, GST, TDS and payroll, share your details through the contact page, and the team will contact you.

Frequently Asked Questions

What should a company ask before authorising a provider on the GST Portal?

Its enrolment certificate in Form GST PCT-02. Under rule 83 of the CGST Rules, 2017, only a person enrolled as a GST practitioner can be authorised in Form GST PCT-05. A provider that keeps your books and handles GST and TDS return filing should name its enrolled practitioner before the first return.

Whose TAN goes on TDS statements that a provider files?

The company's. Section 397(1)(b) of the Income-tax Act, 2025 requires a person allotted a tax deduction and collection account number to quote it in all challans, statements and certificates. A provider prepares and uploads the statement, but it files under the company's TAN, not its own.

How long does a company have to correct a TDS statement?

Two years from the end of the tax year in which the statement was due. Section 397(3)(f) of the Income-tax Act, 2025 sets that limit, including for statements first due under section 200 of the Income-tax Act, 1961. A Form 138 correction for the third quarter of tax year 2026-27, for example, can be filed up to 31 March 2029.

Can the provider file a GST refund claim without the company's approval?

No. Under the proviso to rule 83(8) of the CGST Rules, 2017, a refund claim filed by an authorised GST practitioner is shown to the registered person on the common portal and does not proceed until that person consents. The same applies to amending or cancelling registration and to opting into or out of the composition scheme.

What is GSTR-1A, and when can it fix a GSTR-1 mistake?

GSTR-1A is an optional amendment return that GSTN's FAQs on the form allow only once for a tax period. It opens after GSTR-1 is filed or on its due date, whichever is later, and closes when GSTR-3B for that period is filed. Corrected values flow into GSTR-3B, and recipients see the credit in the next period's GSTR-2B.

Does outsourcing payroll move the ESIC liability to the provider?

No. Section 31 of the Code on Social Security, 2020 makes the employer pay both the employer's and the employee's contributions for every employee, whether employed directly or through a contractor. It may recover a direct employee's share only by deduction from wages, so a provider computes and remits the amounts while the liability stays with the employer.

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About the Author

Mamata Sawant

Mamata Sawant is Senior Director at HSAG Consulting Private Limited, Mumbai, where she has led finance and operations since 2004. She has more than 20 years with the firm, starting in accounts, and is also a Director of H & A Advisory Services Private Limited. She holds a commerce degree from the University of Mumbai.