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This disclaimer is in compliance with the Bar Council of India Rules under the Advocates Act, 1961. Blackthorn Law Offices · Advocate Arindam Nath, Managing Partner · Delhi High Court

Blackthorn
Law Offices · Delhi High Court
Practice Areas About Global Services Legal Blog Book Consultation
Delhi High Court · Decades of Legal Excellence
Blackthorn
Law Offices

A full-service law practice delivering focused, expert counsel in Tax, International Business, Corporate, Civil Litigation, Family and Property matters — personally led by Advocate Arindam Nath.

Managing Partner
Advocate Arindam Nath
Delhi High Court & District Courts, Delhi & Gurgaon
10+
Years Practice
9
Areas
7
Countries
DHC
High Court
Practice Areas
01Tax Law
02International Tax
03GST Advisory
04Corporate & Business
05Civil Litigation
06Family & Divorce
07Property & Real Estate
08Criminal Law
09FEMA & RBI
Serving 7 countries · Decades of Excellence Full Details →
Tax LawPrecisionInternational TaxDelhi High CourtAuthorityGST AdvisoryCivil LitigationJusticeFEMA & RBICorporate Law7 CountriesFamily LawProperty LawBlackthornTax LawPrecisionInternational TaxDelhi High CourtAuthorityGST AdvisoryCivil LitigationJusticeFEMA & RBICorporate Law7 CountriesFamily LawProperty LawBlackthorn

Practice Areas

Nine areas of
deep expertise

Every matter at Blackthorn is handled personally by Advocate Arindam Nath. You receive focused, senior-level expertise — not a junior associate — from the very first conversation to the final resolution.

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Tax Law
01
Tax Law

Income tax planning, assessments, reassessments, Section 148 notices, ITAT appeals and search & seizure matters. Expert representation at every level of tax litigation.

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International Tax
02
International Tax

Cross-border structuring, DTAA advisory across 90+ treaty countries, transfer pricing, withholding tax planning and PE risk analysis for businesses and individuals.

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GST Advisory
03
GST Advisory

GST registration, return compliance, ITC optimisation, e-invoicing, audit support and departmental notices. Full representation before GST Appellate Authorities.

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Corporate
04
Corporate & Business

Company incorporation, shareholder agreements, M&A due diligence, joint ventures, NCLT proceedings and corporate restructuring under the Companies Act 2013.

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Civil Litigation
05
Civil Litigation

Commercial disputes, contract enforcement, injunctions, recovery suits and appellate work before Delhi High Court and District Courts of Delhi & Gurgaon.

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Family
06
Family & Divorce

Contested and mutual divorce, child custody, maintenance, domestic violence matters and NRI matrimonial disputes — handled with discretion and expertise.

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Property
07
Property & Real Estate

Title verification, partition suits, landlord-tenant disputes, builder-buyer matters, RERA complaints and property documentation across Delhi NCR.

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Criminal
08
Criminal Law

Section 138 cheque dishonour, bail applications, economic offences and IPC matters. Representation before Magistrate Courts and Delhi High Court.

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FEMA
09
FEMA & RBI

FDI and ODI structuring, LRS advisory, FCGPR filings, RBI compounding applications and FEMA adjudication for individuals and corporate entities.

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Legal Excellence
Our Commitment
Excellence in Every Matter.
Precision in Every Argument.

Blackthorn Law Offices brings together decades of combined legal expertise — personally delivered to every client, at every stage of their matter, by Advocate Arindam Nath.

AN

Managing Partner

Arindam
Nath
Advocate — Delhi High Court

Decades of focused legal practice built on a single conviction — that every client, regardless of background, deserves the standard of counsel usually reserved for the most powerful.

Delhi High Court — Enrolled Advocate
District Courts Delhi & Gurgaon — Civil & Criminal
International Tax Specialist — 90+ DTAA Countries
Global Practice — US · UK · CA · AU · MY · NZ
Decades of Combined Legal Excellence
WhatsApp Now
Professional Legal Counsel
"Decades of legal expertise, personally delivered. Every matter. Every time."

Blackthorn Law Offices was established with a clear purpose — to make sharp, expert legal counsel accessible to those who need it, without compromise on quality or attention.

Advocate Arindam Nath brings decades of combined experience across domestic and international tax law, corporate structuring, civil litigation, family law and property matters. Practising before Delhi High Court, every case is handled with the depth and personal commitment it deserves.

What sets Blackthorn apart is simple: you always speak directly to the lawyer handling your matter — from first consultation through to final resolution.

Schedule a Consultation →
10+
Years in Active Practice
9
Practice Areas
7
Countries Served
90+
DTAA Treaty Countries
Connecting Law & Life
Every case is a
network of details.

Blackthorn traces every thread — across tax codes, court records, corporate filings and international treaties — so nothing is left to chance.

Global Reach

Serving clients
across 7 countries

Global Services
🇺🇸 USA
🇬🇧 UK
🇨🇦 Canada
🇦🇺 Australia
🇲🇾 Malaysia
🇳🇿 NZ

NRIs, foreign nationals and international businesses rely on Blackthorn for Indian tax compliance, company incorporation, and cross-border legal structuring. We bridge Indian law with your home jurisdiction — precisely and efficiently.

Our Services Abroad

  • GST & VAT registration and monthly filing for foreign entities
  • Company incorporation — Private Limited, LLP, Branch & Liaison
  • DTAA & treaty planning across 90+ countries to reduce withholding tax
  • FEMA compliance, LRS advisory, FDI structuring & RBI filings
🇺🇸
USA
DTAA · LRS
FBAR · NRI Tax
🇬🇧
United Kingdom
Double Tax
NRI Compliance
🇨🇦
Canada
Tax Treaty
Remittances
🇦🇺
Australia
DTAA · Income
Structuring
🇲🇾
Malaysia
FDI · Company
Incorporation
🇳🇿
New Zealand
Tax Compliance
NRI Advisory
🇮🇳
India (FDI)
Inbound FDI
Business Setup
Core Service
GST & Indirect Tax Filing

Indian GST registration and monthly/quarterly filing for foreign entities and NRIs with Indian-sourced income or supply obligations.

Core Service
Company Incorporation

End-to-end formation of Private Limited companies, LLPs, Branch Offices and Liaison Offices for foreign investors entering India.

Core Service
DTAA & Treaty Planning

Reduce withholding tax, eliminate double taxation and optimise cross-border income using India's treaty network of 90+ countries.

Core Service
FEMA & RBI Compliance

FDI, ODI, LRS remittances, FCGPR filings, compounding applications and ongoing FEMA advisory for individuals and corporates.

Global Legal Services
Global Reach
Serving 7 Countries.
One Trusted Counsel.

From the US to Malaysia, NRIs and global businesses rely on Blackthorn for Indian tax, FEMA, and corporate compliance.

Blackthorn Office
Our Approach
Precision. Dedication. Results.

Why Blackthorn

What sets us
apart

01
Founder-Led, Always

Every matter is handled personally by Advocate Arindam Nath. You never speak to a junior when your legal interest is at stake.

02
Specialist Depth

A decade of focus across nine interlocking practice areas means holistic advice — tax, corporate, litigation and compliance in one counsel.

03
Global & Domestic

Rare combination of international tax expertise and robust Delhi High Court litigation experience, serving both local and overseas clients.

04
Transparent Fees

Clear, upfront fee estimates before any engagement begins. No surprises, no ambiguity — just honest counsel at a fair price.

Our Process

From first contact
to final resolution

01
WhatsApp or Write

Send a WhatsApp or fill the contact form. We respond within 2 hours on working days — no query is too small for a proper response.

02
Initial Consultation

An in-depth consultation — in person or via video call — to fully understand your situation, objectives and the options available to you.

03
Strategy & Fee Brief

A clear legal strategy, realistic timeline and transparent fee estimate. You approve every step before we proceed.

04
Full Execution

We handle every filing, court appearance and negotiation — keeping you informed at each milestone until complete resolution.

"Arindam handled our international tax matter with a precision that genuinely surprised us. Direct, deeply knowledgeable, and always reachable — exactly what you want from a lawyer."

NRI Client — United States
Legal Team
Managing Partner
Advocate Arindam Nath
Delhi High Court · District Courts Delhi & Gurgaon

Blackthorn Law Offices brings together decades of combined legal experience across taxation, corporate law, civil litigation, family law and international practice — with every matter handled personally at the senior level.

Legal Insights

Blackthorn Legal Blog

Income Tax
Income Tax Notice Received? Here is Exactly What to Do
Most income tax notices are routine — but every single one demands a precise, timely response. Ignoring any notice is the costliest mistake.
Jan 2025
Income Tax
Old Tax Regime vs New Tax Regime — Which Should You Choose?
The new tax regime has lower slabs but strips most deductions. For most salaried individuals the answer is not obvious — it depends entirely on your numbers.
Feb 2025
Income Tax
Section 80C — The Complete Guide to Rs 1.5 Lakh Deduction
Section 80C is the most widely claimed deduction — yet most taxpayers leave money on the table by not understanding all eligible investments.
Mar 2025
Income Tax
Capital Gains Tax in India — Complete 2025 Guide
Shares, mutual funds, property, gold — every asset has different capital gains rates and holding periods. Get this wrong and the tax surprise can be severe.
Apr 2025
Income Tax
Tax on Freelance and Consultant Income — What Self-Employed Professionals Must Know
If you earn from freelancing, consulting, content creation or any profession, your tax obligations are very different from salaried employees.
May 2025
Income Tax
Cryptocurrency and Digital Assets — Tax Rules in India
Since April 2022, India has a clear (and harsh) tax framework for crypto. Every transaction is taxable and losses cannot be set off.
Jun 2025

Get In Touch

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Consultation

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Courts
Delhi High Court · District Courts Delhi & Gurgaon
Office Hours
Monday – Friday10:00 AM – 6:00 PM
SaturdayBy Appointment
WhatsApp9:00 AM – 9:00 PM
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