Tax & audit,
handled with precision.
Year after year.
A boutique chartered accountancy practice serving founders, family businesses and multinationals across India — pairing AI-driven precision with partner-led judgment to remove the complexity from compliance, planning and statutory audit.
Seven disciplines.
One quiet team.
Whether you need a single return filed or a full statutory audit conducted across multiple entities, our partners and associates are organised into focused practice groups — pairing AI-driven precision with partner-led judgment — so the right desk picks up your file from day one.
ITR Filing
Accurate, on-time income tax returns for individuals, firms, LLPs and companies — with rectifications, refunds and notice handling end to end.
- Salaried & business returns
- Capital gains & foreign assets
- Notices, rectifications, appeals
- Refund follow-through & CPC liaison
Tax Planning
Year-round, structure-aware tax planning — designed to lower outflow without inviting scrutiny or compromising on future flexibility.
- Entity & remuneration design
- Investment & capital structuring
- Advance tax forecasting
- Family & succession positioning
GST Returns
Monthly, quarterly and annual GST compliance with ITC reconciliations, e-invoice readiness, and prompt response to departmental queries.
- GSTR-1 / 3B / 9 & 9C filings
- Input Tax Credit reconciliation
- Refunds, audits, representations
- E-invoice & e-way bill compliance
TDS & TCS Reconciliation
Vendor-level reconciliation against Form 26AS, AIS and TIS — so credits aren’t lost, defaults don’t compound, and refunds come through on time.
- Quarterly TDS / TCS returns
- 26AS · AIS · TIS matching
- Default rectification & CPC notices
- Form 16 / 16A issuance & corrections
Expat Tax & Transfer Pricing
Cross-border employees, related-party flows, and the documentation that satisfies both the assessee and the assessing officer.
- Residency & DTAA positions
- Form 3CEB · TP study reports
- Inbound & outbound assignments
- Master & local file documentation
Tax Litigation & Representation
Notices, scrutinies and assessments handled with documented responses and partner-led representation through every tier of the appeal hierarchy.
- Assessments & scrutiny replies
- Notices · show-cause · penalty
- CIT(A) & ITAT appeals
- High Court & writ representation
Statutory Audit.
An independent statutory audit conducted under the Companies Act, 2013 and applicable Standards on Auditing — with documented testing, partner sign-off and a board-ready report.
- Companies Act 2013 · Ind AS / AS
- Substantive & analytical testing
- Internal controls & CARO reporting
- Board report & management letter
Twelve names. One signature standard.
Two co-founders and ten partners — every engagement at our practice carries a name from this page. The roster rotates below — tap any card to pause.
Ankit Jain
Co-Founder— MAS LLP
Siddhartha Havelia
Co-Founder— MAS LLP
Rajesh Bansal
Partner— Tax & Regulatory
Mehak Taneja
Partner— India Business Setup
Ravi Gupta
Partner— Audit & Assurance
Gaurav Kohli
Partner— M&A and Valuation
Rohit Kumar
Partner— Global Business Setup
Vishal More
Partner— CFO Advisory
Manvi Arora
Specialist— US Accounting & Tax
Rajeev Ranjan
Partner— Canada Tax & Accounting
Yitesh Bhalla
Partner— UK Accounting & Tax
Chandramani Goel
Partner— Australia Accounting & TaxQuiet introductions, said out loud.
Mercurius has been conducting our PCAOB audit since 2020. They have a great team with high standards of professionalism and excellence in their work — indeed an incredible team to work with.
Got my ITR filed through Mercurius and had a great experience. Sakshi and Divyansh were super helpful — answered all my calls and cleared every doubt. Definitely recommend them.
For over six years, Mercurius has been our trusted partner for broker-dealer audits. Their accuracy and deep regulatory understanding make the process seamless. Reliable, on deadline, great support.
Excellent service. Competent work. They instruct as they audit, improving the company’s record keeping and control. Strict standards and practical solutions. Highly recommended.
Associated with Mercurius for over seven years — service always outstanding. Whether personal or business accounting, they consistently go above and beyond. Truly a top-notch firm.
Worked with Mercurius for four years and have had a wonderful experience. Called the PCAOB board to check them out and reviewed their SEC filings. Easy to work with, very professional.
Very professional and agile in their work. System-driven, with the approach of a large firm yet a personalised relationship with each client.
Three kinds of client. One standard.
Founders & Scale-ups
Built for the next round.
Family Businesses
Stewarded across generations.
Cross-border
Two passports, one ledger.
Open the book. Turn the pages.
First call to first filing — five pages, AI-assisted, partner-led.
A short call.
We listen first — to your books, your timing, and the moment you find yourself in. By the end, both sides know whether to proceed.
A written proposal.
Within forty-eight hours: deliverables, timing, quote, and the partner who will handle you. Read it before you commit.
Letter signed.
Your engagement partner is assigned by name. Everything runs through that one chair — not delegated below.
Records in hand.
First thirty days: handover from prior advisors, KYC complete, system access granted, opening position reconciled clean.
A quarterly rhythm.
Partner-led review at the close of every quarter. No surprises. No year-end scrambles. This is where the relationship lives.
Let's start the conversation.
Our Offices worldwide 6 cities
— India · USA · Japan · UAE —New Delhi
India · 110052A-94/8, Wazirpur Industrial Area, Main Ring Road.
Map BranchNoida
U.P. · 201301Cabin 010, Office Square, Tower A-1, Sector 3.
Map BranchGurugram
Haryana · 122009Cabin 210, OFIS Square, Vatika Triangle, Sushant Lok.
Map RepresentativeOakland
USA · MD 215505000 Thayer Center, Suite C, Maryland.
Map RepresentativeTokyo
Japan · 101-0051MT-O Jinbocho 3F, 1-14-3 Kanda Jinbocho, Chiyoda-ku.
Map OfficeDubai
U.A.E.Meydan Grandstand, 6th Floor, Nad Al Sheba.
Map
Most clients ask
one of these.
Replies from the partner who would handle your file — brief, candid, and updated when the answer changes.
I. How does an engagement begin?
A 20-minute call first — to understand your books, your timing, and whether we're the right fit. If we both agree, a written proposal lands in your inbox within forty-eight hours: scope, deliverables, fee, and the partner who will own your file.
Nothing is billed until the engagement letter is signed. Until then, the conversation costs you nothing.
II. Who actually handles my work — a partner or an associate?
A partner, named in the engagement letter, owns your file. Associates support — they prepare returns, run reconciliations, draft schedules — but the partner reviews and signs every deliverable before it leaves the office.
If your matter is a statutory audit, the engagement partner also signs the audit report. Nothing material is delegated downstream and forgotten.
III. What does "AI-driven" actually mean here?
AI-AssistedWe use automated tools for the mechanical work: 26AS / AIS / TIS reconciliation, vendor-level matching, OCR on invoices, anomaly flagging during audit, and first-pass drafts for routine notice responses.
Every output is partner-reviewed before it reaches you or the department. The technology handles the patterns; the judgment is ours. We're explicit about which services are AI-assisted and which aren't — see Services.
IV. What's a typical turnaround time?
ITR: three to five business days once your records are clean. GST: filed before the statutory due date, every cycle, with reconciliation noted in the working paper. Statutory audit: a board-ready report within three weeks of receiving the trial balance.
We commit to a date in the engagement letter, not after the work starts. If the date slips, we say so before the deadline — never after.
V. We already have a CA. Can you take over mid-year?
Yes — and we do this often. We handle the handover with your prior advisor (with your written permission), complete KYC, reconcile the opening position, and you sign off on the position before we start fresh. Typically thirty days end-to-end.
No interruption to your filings. No gap in the audit trail. We don't speak ill of the previous CA — we just pick up cleanly.
VI. We have entities in multiple countries. Can you handle all of them?
Yes. India, US, UK, Canada, Australia — we have partners in each practice with local credentials and local filing infrastructure. One engagement letter can cover a group across multiple jurisdictions, with a single point of contact for you.
Where we don't operate locally (mainland Europe, the Gulf, Singapore), we work with vetted correspondents — and we'll be candid on the first call about where the line is.
VII. What if our matter is outside your usual scope?
Tell us on the first call. If it's something we don't do well — registered valuation, litigation counsel, loss assessment, forensic investigation — we'll say so, and point you to someone who handles it properly.
We'd rather decline than disappoint. The boutique posture only works if we stay disciplined about what we accept.