How to acquire Indian citizenship

Indian citizenship is governed by the Citizenship Act, 1955, as amended several times — most notably by the Citizenship (Amendment) Act, 2003 (which commenced in December 2004), the Citizenship (Amendment) Act, 2015, and the Citizenship (Amendment) Act, 2019 (rules notified in March 2024). The Act recognises five pathways today: birth, descent, registration, naturalisation, and the special CAA 2019 route for certain persecuted minorities.

India does not allow dual citizenship. Acquiring Indian citizenship requires renouncing your existing citizenship. The OCI card is a lifelong visa and a bundle of specific rights — it is not dual citizenship. If you want the detail, see the dual citizenship article.

1. By Birth (Section 3)

Anyone born in India on or after 26 January 1950 may be a citizen by birth, subject to rules that tightened over time:

Before 1 July 1987: every person born in India was a citizen by birth (with standard exceptions for children of diplomats and of enemy aliens).
1 July 1987 – 2 December 2004: at least one parent had to be an Indian citizen at the time of birth.
From 3 December 2004: both parents must be Indian citizens, or one parent must be an Indian citizen and the other must not be an illegal migrant at the time of birth.

The commencement date for the third rule is 3 December 2004, when the Citizenship (Amendment) Act, 2003 was brought into force — older articles sometimes cite January 2004, which is incorrect.

2. By Descent (Section 4)

A person born outside India can acquire Indian citizenship by descent if an Indian-citizen parent meets the rules in force on the date of birth:

Before 10 December 1992: the father had to be an Indian citizen at the time of birth.
10 December 1992 – 2 December 2004: either parent being an Indian citizen at the time of birth qualifies the child.
From 3 December 2004: birth must be registered at the Indian consulate within one year (or, after that, with the permission of the Central Government). The parents must also declare that the minor does not hold the passport of another country.

Birth registration at the consulate is handled through the same indiancitizenshiponline.nic.in portal.

3. By Registration (Section 5)

Section 5 of the Citizenship Act lays out several sub-categories. All of them require that the applicant first renounce existing citizenship and be of good character. The main routes:

Section 5(1)(a) — Person of Indian origin resident in India: ordinarily resident in India for seven years immediately before applying
Section 5(1)(b) — Person of Indian origin ordinarily resident outside undivided India: no minimum residence, but rarely used today
Section 5(1)(c) — Spouse of an Indian citizen: married to an Indian citizen and ordinarily resident in India for seven years immediately before applying
Section 5(1)(d) — Minor children of Indian citizens
Section 5(1)(e) — Adult children whose parents have themselves been registered as Indian citizens under Section 5(1)(a) or Section 6(1)
Section 5(1)(f) — Former Indian citizens (or those with a parent who was a citizen of independent India): resident in India for at least one year immediately before applying
Section 5(1)(g) — OCI cardholders: registered as an OCI Cardholder for at least five years and ordinarily resident in India for twelve months immediately before applying. This is today the most commonly used registration route for OCI holders who wish to convert to full citizenship.

Older write-ups sometimes mention reciprocal arrangements for citizens of Singapore, Canada, or other specific countries. These are not part of the current statute — the operative provisions are the ones listed above.

4. By Naturalisation (Section 6 and Third Schedule)

An adult foreign national who is not of Indian origin and not married to an Indian citizen typically acquires citizenship through naturalisation. The requirements under the Third Schedule of the Act are:

Is not a citizen of a country that prohibits Indians from becoming naturalised citizens there
Has renounced the prior citizenship (or undertakes to do so) in the manner prescribed
Has either resided in India or been in the service of a Government in India for the 12 months immediately before the date of application
During the 14 years preceding that 12 months, has resided in India or been in Government service in India for periods totalling at least 11 years (so an effective 12-year qualifying window, with continuity for the final year)
Is of good character
Has an adequate knowledge of a language specified in the Eighth Schedule of the Constitution
Intends to reside in India or continue in Government service after naturalisation

Certain categories — distinguished service to science, philosophy, art, literature, world peace, or human progress — can be granted naturalisation with relaxed residence requirements at the Government's discretion.

5. The CAA 2019 Route (Section 6B)

The Citizenship (Amendment) Act, 2019, operational rules for which were notified on 11 March 2024, created a separate, faster pathway under new Section 6B for specific groups:

Eligible communities: Hindu, Sikh, Buddhist, Jain, Parsi, or Christian
Eligible countries of origin: Afghanistan, Bangladesh, or Pakistan
Entry date into India: on or before 31 December 2014

For this group, the aggregate residence requirement is reduced from 11 years to 5 years (for both the registration and naturalisation pathways, as applicable). Eligible applicants apply through a dedicated CAA section on the official citizenship portal.

This route is narrow by design and has been the subject of ongoing legal challenges — it does not apply to Muslims or to migrants from countries outside the three named above.

6. Where and How to Apply

All citizenship applications — except CAA 2019, which has its own section of the same portal — are filed online at:

https://indiancitizenshiponline.nic.in/

The portal covers:

Section 4 — registration of birth of a minor at an Indian consulate (descent)
Section 5 — registration (all sub-categories, including the OCI route)
Section 6 — naturalisation
Section 6B — CAA 2019

General steps:

Create an account on the portal and select the applicable section.
Complete the online form, upload scanned documents (passport, OCI card if applicable, proof of residence, renunciation undertakings, character references), and pay the fee online.
Print the filled form, sign it, and submit physical copies to:
- In India: the Collector/District Magistrate of your district (applications go up to the State Government and then the Ministry of Home Affairs)
- Abroad: the Indian Mission serving your jurisdiction
Attend any interview the authority requires.
On approval, take the Oath of Allegiance before the designated authority and receive the certificate of registration or naturalisation.

7. Typical Timelines and Fees

Exact fees and timelines vary by category and are updated periodically on the portal. As broad planning numbers:

Processing time — often one to two years end-to-end; complex files can take longer
Fees — generally a few thousand rupees (minor) to around Rs. 15,000 (naturalisation), updated from time to time. The portal shows the exact amount during the application.
Renunciation of prior citizenship — handled separately with your existing country of citizenship; in many countries (e.g., the US) this is a paid and formal process at your own embassy

8. Things Applicants Often Get Wrong

Assuming OCI equals citizenship — it does not. OCI is a visa + rights bundle; full citizenship requires a separate Section 5(1)(g) application and renunciation of foreign citizenship.
Confusing the 1-year continuity with the 11-year aggregate in naturalisation — both must be met.
Forgetting birth registration deadlines — for descent cases after 3 December 2004, one year is the default; delays require Central Government permission.
Relying on old rules for the spouse route — the current requirement is seven years of residence after marriage, not five.
Assuming the CAA 2019 route is open to all — it is strictly limited to the six named communities from three named countries who entered India by 31 December 2014.

9. Before You Apply

Citizenship is a one-way decision — you give up your existing passport. Before starting an application:

Read your current country's renunciation rules. Some countries (US, UK) require a formal, paid renunciation with their embassy; others (Canada) have a separate application; a few (e.g., countries that tolerate dual citizenship in practice) do not require formal renunciation, though India's own rules still demand it.
Decide whether OCI is enough. Many NRIs find OCI gives them almost everything they need — lifelong visa, right to live and work (other than agricultural land purchase and certain public-service jobs), property rights — without giving up their foreign passport.
Check current fees, rules, and timelines on the official portal before submitting. The Ministry of Home Affairs periodically updates forms and requirements; treat this guide as an overview, not a substitute for the current portal instructions.

For the related rules on the other side of the transaction — giving up Indian citizenship and acquiring a foreign one — see the loss of Indian citizenship article.