The short answer
Sikkim is a border state, and much of East Sikkim lies close to the line with Tibet. That is why permits matter here more than in most Indian hill regions. The good news is that the system is well practised. Thousands of visitors go through it every week in season, and travel agents in Gangtok handle almost all the paperwork for you.
For Indian nationals, Gangtok, Rumtek, Aritar and most of the lower valleys are open without any permit. You need a permit for Tsomgo Lake and Baba Mandir, a separate one for Nathu La, and a Protected Area Permit for the Silk Route through Zuluk, Nathang and Kupup. All of these are arranged through registered travel agents or, in the case of Zuluk, often through your homestay host.
For foreign nationals, the first step is the Sikkim Inner Line Permit, formally called a Restricted Area Permit, which you need simply to enter the state. After that, foreigners can visit Tsomgo Lake on a day trip with a Protected Area Permit, usually in a group of at least two, but cannot go to Nathu La or Zuluk. All rules in this guide are indicative and change from time to time. Check current status before you travel.
Permits at a glance
The table below sums up who can go where in East Sikkim and how the permit is obtained. It reflects the usual arrangements in recent seasons. Fees are small and are normally included in the price an agent quotes for the vehicle, so most travellers never pay them separately.
| Place | Indian nationals | Foreign nationals | How it is issued |
|---|---|---|---|
| Gangtok, Rumtek, Aritar | No permit | Sikkim Inner Line Permit only | ILP at Rangpo, Bagdogra, Sikkim House Delhi or Siliguri |
| Tsomgo Lake and Baba Mandir | Permit needed | Tsomgo only, with a Protected Area Permit, usually groups of two or more | Registered travel agent in Gangtok, a day ahead |
| Nathu La | Permit needed; usually closed to tourists on Mondays and Tuesdays | Not allowed | Registered travel agent in Gangtok, a day ahead |
| Zuluk, Nathang, Kupup (Silk Route) | Protected Area Permit | Not allowed | Through a registered agent or homestay host, checked at Rongli |
| North Sikkim (for comparison) | Permit needed | Some areas only, in groups | Registered travel agent in Gangtok |
The Inner Line Permit for foreign travellers
Every foreign national entering Sikkim needs the Inner Line Permit, which the government formally calls a Restricted Area Permit. It is free. You need your passport, a valid Indian visa and passport-size photographs, and you fill in a short form. In recent years an online application has also been available through the Sikkim government's permit portal, which you can use before you arrive.
The most common places to get it are the Rangpo checkpost on NH10, where the road from Siliguri enters Sikkim, the counter at Bagdogra airport, Sikkim House in New Delhi and the Sikkim Tourism office in Siliguri. At Rangpo, ask your driver to stop at the foreigners' registration office before the checkpost; the process usually takes 15–30 minutes. Indian missions abroad can also issue the permit with your visa.
The permit has usually been issued for 30 days and could be extended for a further period in Gangtok. Keep it with your passport throughout the trip, as it is checked at hotels and checkposts, and you need it again when you apply for the Tsomgo permit. Overseas Citizens of India are treated as foreign nationals for these rules. Check current status before you travel.
- Bring several photocopies of your passport photo page and visa.
- Carry four to six passport photographs for this and later permits.
- Write down your hotel address in Gangtok; the form asks for it.
- Do not cross Rangpo without the permit; you may be sent back.
Tsomgo Lake and Nathu La permits for Indian travellers
Tsomgo Lake, Baba Mandir and Nathu La lie on the same road east of Gangtok, beyond the Kyongnosla checkpost. You cannot simply drive up. Tourists must go in a vehicle registered for the route, booked through a travel agent registered with the Sikkim tourism department. The agent applies for the permit on your behalf, usually online, and hands the permit to the driver.
The documents needed are simple: a copy of a government photo ID for each traveller, such as Aadhaar, a passport, a driving licence or a voter ID, and two passport-size photos. Children who do not have photo ID may need a birth certificate or school ID; ask the agent. Hand the documents over by early afternoon the day before your trip. For Nathu La, this deadline is strict, as the permit is processed in advance.
Nathu La is usually open to tourists from Wednesday to Sunday and closed on Mondays and Tuesdays. It can also close at short notice for snow, security reasons or official visits. When that happens, vehicles usually go only as far as Tsomgo and Baba Mandir, and agents adjust the fare. Tsomgo itself is open most days, though snow can close the road for a day or more in winter. Check current status before you travel.
There have at times been age limits for Nathu La, aimed at protecting very young children and elderly visitors from the altitude. These have changed over the years, so ask the agent when you book if you are travelling with a baby, toddler or anyone over about 70.
The Zuluk and Silk Route permit
The Silk Route through Zuluk, Thambi viewpoint, Nathang and Kupup lies in a restricted border area in Pakyong district. Indian nationals need a Protected Area Permit for it, and foreign nationals are not allowed at all. The checkpost that matters is at Rongli, where the road begins to climb towards Zuluk.
In practice, most travellers never visit an office. You book a homestay in Zuluk or a Silk Route package, send scans of photo ID and passport photos a few days ahead, and the host or agent obtains the permit. The driver carries it and shows it at Rongli and at army checkposts higher up. If you plan to cross the high road from Zuluk past Kupup and Tsomgo to Gangtok, make sure the permit covers that route.
Keep printed copies of your ID with you, because signal is patchy and you may be asked to show documents at checkposts. Do not photograph army installations, and follow instructions from soldiers at all times. The permit is for a fixed route and dates, so tell the agent in advance if your plan changes. Check current status before you travel.
Timing, fees and what can go wrong
Permit fees in East Sikkim are small, typically a few hundred rupees per person including processing, and are usually built into the price of the vehicle or homestay package. The real cost is the vehicle. A pooled seat to Tsomgo and Baba Mandir costs about ₹700–1,200 a person, and a reserved car about ₹3,500–5,000, rising to ₹5,500–7,500 with Nathu La. These prices are indicative and rise in snow season and peak holidays.
The most common problem is weather. Snow in winter and landslides in the monsoon close the high roads for a day or more, and nobody can predict exactly when. That is why we always suggest one spare day in Gangtok. The second most common problem is late paperwork: documents handed in after the deadline mean the trip moves a day.
Peak weeks also cause trouble. During the Durga Puja holidays in October, around Christmas and in late May, demand for permits and registered vehicles is very high, and agents run out of cars. Book a few days ahead in those weeks, and try to avoid Mondays and Tuesdays if Nathu La is the main reason for your trip.
- Hand documents to the agent by early afternoon the day before.
- Keep one spare day in Gangtok for weather.
- Plan Nathu La for Wednesday to Sunday.
- Carry original ID on the day, not just photocopies.
- In peak weeks, book the vehicle at least two or three days ahead.
Choosing a registered agent
Gangtok has hundreds of travel agents, and most of the ones on and around MG Marg are registered and reliable. Ask to see the agent's registration with the Sikkim tourism department, compare two or three quotes, and confirm in writing what is included: the permit, the vehicle type, the places covered and the start time. Hotels can also arrange permits through agents they trust, often at a small mark-up that is worth paying for the convenience.
Be wary of anyone in Siliguri offering to arrange Nathu La permits at a very low price without your documents, or promising that foreigners can visit Nathu La or Zuluk. Neither is possible within the rules. A good agent tells you honestly when a road is closed rather than selling you a trip that will turn back at Kyongnosla.
Questions travellers ask
Good to know
Do Indians need a permit to visit Sikkim?
No permit is needed for Indian nationals to enter Sikkim or to visit Gangtok, Rumtek, Aritar, Pelling and most lower areas. Permits are needed for restricted areas near the border: Tsomgo Lake, Nathu La and the Silk Route in East Sikkim, and Lachung, Lachen and beyond in North Sikkim. Check current status before you travel.
How do foreigners get the Sikkim Inner Line Permit?
Apply at Rangpo checkpost on NH10, at Bagdogra airport, at Sikkim House in New Delhi or at the Sikkim Tourism office in Siliguri, with a passport, valid Indian visa and passport photos. It is free, and an online application has also been available. It has usually been valid for 30 days. Check current status before you travel.
Can foreigners visit Nathu La?
No. Nathu La permits are issued only to Indian nationals. Foreign nationals, including OCI card holders, can visit Tsomgo Lake on a day trip with a Protected Area Permit arranged through an agent, usually in a group of two or more, but must turn back before the pass. Check current status before you travel.
Can foreigners visit Zuluk and the Silk Route?
No. The Silk Route through Zuluk, Nathang and Kupup is closed to foreign nationals. Foreign travellers can visit Aritar, which lies below the restricted area, and enjoy similar village homestays there. For high mountain roads, they can visit Tsomgo Lake, and some areas of North Sikkim are open to them in groups. Check current status before you travel.
How far in advance do I need to apply for the Nathu La permit?
Hand your documents to a registered agent by early afternoon the day before your trip. The agent processes the permit overnight. In peak weeks, book the vehicle two or three days earlier, but the documents can still go in the day before. You cannot get a Nathu La permit on the morning of travel.
What documents do I need for Tsomgo and Nathu La permits?
Each Indian traveller needs a copy of a government photo ID, such as Aadhaar, passport, voter ID or driving licence, and two passport-size photographs. Carry the original ID on the day, as it may be checked. Children without photo ID may need a birth certificate or school ID; confirm with your agent.
Why is Nathu La closed on Mondays and Tuesdays?
The pass is a military area, and tourist access is allowed only on certain days to fit around army and border-trade routines. In recent seasons it has usually been open to tourists from Wednesday to Sunday. Closure days can change, and the pass also closes for snow or security reasons. Check current status before you travel.
Do I need a permit to drive my own car to Tsomgo?
Tourist access to Tsomgo and Nathu La is generally allowed only in vehicles registered for the route and booked through a registered agent. Private cars from outside Sikkim are usually stopped at the Kyongnosla checkpost. Leave your own car in Gangtok and hire a local registered vehicle for the day.
What happens if my permit trip is cancelled by snow?
If the road is closed before departure, the agent usually postpones the trip to the next open day or refunds the vehicle cost. If the road closes during the day, the vehicle turns back from the furthest open point, and you may get a partial refund. Keeping a spare day in Gangtok is the best protection.
