How to Buy Bandwidth for ISP in India: A Small Operator's Guide
To buy bandwidth for an ISP in India, you sign a contract with a licensed upstream provider for internet capacity (IP transit), usually priced per Mbps and delivered over a fibre or radio link to your head-end. Get quotes from at least two upstreams, check the committed rate, the link's SLA and how you will be billed, and add a second path as soon as your subscriber count justifies it.
This guide is for cable operators, Local Network Operators (LNOs) and new broadband entrepreneurs who already have, or are applying for, an ISP licence and now need to decide where their internet capacity will come from. We cover what you are really buying, the questions to put to every upstream, how to size capacity, and what NIXI peering can and cannot do for you.
What you are actually buying when you buy ISP bandwidth
Your subscribers reach the internet through your network, and your network reaches the rest of the internet through an upstream provider. That upstream sells you IP transit: the right to send and receive traffic to and from the whole internet through their network. Three separate things are usually bundled in one quote, and it helps to price them separately:
- The circuit that physically connects your head-end to the upstream's point of presence (PoP): leased fibre, a radio link or a managed Ethernet service.
- The capacity you commit to, for example 1 Gbps delivered on the circuit, with a committed rate you pay for regardless of use.
- The services around it: BGP session, IP address support, monitoring, support hours and outage response.
A cheap per-Mbps price can hide an expensive circuit, or a support promise that is only office hours. Always ask for the total monthly cost, the contract length and any one-time installation charge.
Step 1: Check your licence and your legal position first
Internet transit for resale to subscribers is sold to licensed ISPs. The DoT ISP licence has categories (A, B and C) that differ in the area you may serve and in the fees. If you are not yet licensed, read our guides to the ISP licence categories A, B and C and the ISP licence cost breakdown before signing any bandwidth contract. Some operators work as a franchisee or partner of a licensed ISP instead; in that case the licensed ISP is your bandwidth source and your agreement with them matters more than any per-Mbps price. We do not give legal advice, so confirm your exact rights and obligations with the Department of Telecommunications.
Step 2: Estimate how much bandwidth you need
Do not size capacity by multiplying subscribers by their plan speed. Home users rarely use their full plan at the same moment, so your upstream capacity is shared. A practical approach for a small operator:
- Start with your current peak-hour traffic. Read it from your OLT, router or monitoring graphs for the busiest evening hours, not the daily average.
- Add growth. Estimate new connections for the next 6 to 12 months and scale peak traffic proportionally.
- Add headroom for evenings with big streaming or cricket events, which create short, sharp peaks.
- Keep your core link comfortably below saturation. Congestion is what subscribers notice, so ask your upstream how quickly you can add capacity.
For a brand-new network with no traffic history, start with a smaller commitment and a contract that lets you scale up easily, rather than locking into a large fixed commitment for a year. The contention ratios that work depend on your plan mix and subscriber habits, so measure rather than copy a rule of thumb.
Step 3: Questions to ask every upstream provider
Use the same checklist with every provider so the quotes can be compared fairly:
- What is the price per Mbps, and is it for a committed rate, a burstable rate or both?
- How is usage measured and billed: flat commit, or a percentile of traffic samples? Ask them to explain it with an example month.
- What is the SLA for uptime and the time to restore service? Is it written into the contract with credits for downtime?
- Where is their nearest PoP, and who provides and maintains the last-mile circuit to you?
- Do they support BGP with your own AS number, or will they give you addresses from their own pool? What does renumbering cost if you change provider later?
- How fast can capacity be upgraded, and are there minimum contract terms or exit charges?
- Are support and the network operations centre available 24x7, including festival days?
- Does the quote include GST and all installation charges?
Treat verbal promises as nothing until they are in the order form. If a price looks far below the others, ask what is excluded.
Step 4: Plan redundancy early
A single upstream and a single link is a single point of failure. One fibre cut on the route to your upstream takes down every subscriber. As you grow, add a second path: ideally a second upstream, or at least a physically different route into the same provider. Link outages are also behind many customer complaints about dropped connections; our guide to the LOS red light on an ONU shows the customer-side view. Redundancy costs more, so decide the trigger point in advance, for instance a subscriber count or a revenue level, at which it becomes mandatory for your business.
Where NIXI peering fits in
The National Internet Exchange of India (NIXI) is a neutral exchange where ISPs exchange traffic directly. It is often misunderstood by new operators, so the rules matter. According to NIXI's own How to Join page:
- Licensed ISPs can become NIXI peers.
- NIXI is not an ISP and does not provide internet connections or transit. Members must maintain full internet connectivity independent of NIXI.
- Members supply their own backhaul, meaning the routers, converters, cabling and leased lines needed to reach the NIXI node, and pay the carriers directly.
- Members must provide a round-the-clock contact for urgent incidents and outages.
In other words, NIXI peering does not replace buying bandwidth. It can sit beside it. The How to Join page lists a membership fee of Rs. 1,000 plus taxes per year on an all-India basis. NIXI's tariff policy, effective 1 July 2025, lists a one-time joining charge of Rs. 1,000 per NIXI PoP and annual port charges that depend on the node. At the metro nodes (Delhi, Noida, Mumbai, Chennai, Hyderabad, Bangalore and Kolkata) the 100 Mbps, 1 Gbps and 10 Gbps ports are listed at Rs. 35,000, Rs. 110,000 and Rs. 580,000 a year. At all other (edge) nodes they are listed at Rs. 87,500, Rs. 275,000 and Rs. 1,450,000 a year.
The two NIXI pages describe the fees differently, so confirm the current charges with NIXI before budgeting. Remember that the circuit to reach the NIXI node and your own router are extra costs. For a very small operator these can outweigh the exchange fee, so peering generally starts to make sense once you carry enough local traffic to justify it. Ask your upstream whether they already peer at NIXI.
Contract and monitoring checklist
- Written SLA with remedies, not just a target.
- Clear definition of how usage is measured and billed.
- Contract length, renewal terms and notice period.
- Upgrade path and price for extra capacity.
- Escalation contacts, including a night and holiday number.
- Your own graphs: monitor traffic at your edge router so you can check the upstream's billing and spot congestion early.
Once bandwidth is flowing, the next cost centres are billing, support and field operations. Our ISP billing software guide covers what to look for, and our wider guide to starting a broadband ISP business walks through the other set-up costs.
Frequently asked questions
Can I buy bandwidth without an ISP licence?
Transit for resale to subscribers is sold to licensed ISPs. Many small operators instead partner with a licensed ISP. The rules depend on your arrangement, so confirm with the Department of Telecommunications and get any partnership terms in writing.
How much does ISP bandwidth cost per Mbps in India?
Prices vary by city, circuit type, commitment size and provider, and they change often, so we do not quote a single number. Ask at least two or three providers for written quotes using the checklist above and compare the total monthly cost, not just the per-Mbps rate.
Does NIXI sell internet bandwidth?
No. NIXI states that it is not an ISP and does not provide internet connections or transit. Members need their own full internet connectivity. NIXI lets licensed ISPs exchange traffic with each other directly.
When should I add a second upstream?
When an outage would cost you more in refunds, lost subscribers and goodwill than the second link costs each month. Decide the trigger in advance rather than after the first long outage.
Run the operator side with LNO360
Bandwidth is one cost line; keeping subscribers, billing and support in order is the rest. LNO360 is operator software for LCOs, LNOs and small ISPs, covering subscriber records, billing, complaints and technician dispatch in one place. Book a demo at lno.co.in to see how it fits your network.
Last reviewed: October 2026. Fees and policies change; confirm with NIXI and the Department of Telecommunications before you commit.