How is bulk SMS charged in India?

Bulk SMS is usually charged per SMS segment. An English GSM-7 segment holds up to 160 characters, while Hindi and other Unicode messages hold 70 characters per segment, so longer or regional-language messages cost more.

Are failed SMS messages charged?

It depends on the provider. Many deduct credits on submission, while some refund failed or undelivered messages. Ask for the policy in writing before you buy credits.

Is DLT registration included in the bulk SMS price?

Not always. Operators charge their own DLT entity registration fee, and providers differ on whether they help with headers, templates and chain binding as part of the service or charge separately.

Why do OTP SMS cost more than promotional SMS?

OTP and transactional messages use priority routes that deliver quickly at any time of day, and delivery reliability is critical. Promotional messages use routes that only deliver within the daytime window and exclude DND customers.

Do bulk SMS credits expire?

Many providers set a validity period on credits. Check validity before buying a large pack, because unused credits that expire can make a low per-message rate expensive in practice.

Bulk SMS Pricing in India: What Really Drives the Cost

Search for "bulk SMS price in India" and you will find a wide range of per-message rates, often advertised as low as possible. The headline rate, though, is only one part of the real cost. Message length, language, category, delivery quality, minimum purchase, credit validity and support all change what you actually pay for each message that reaches a customer.

We deliberately do not publish a single rate in this article, because a meaningful price depends on your volumes, category and use case, and per-message rates in India can change with operator charges. Instead, this guide explains how pricing works so you can read any quote critically and compare providers on a like-for-like basis.

1. You pay per SMS segment, not per message

A single SMS segment holds up to 160 characters when it uses the standard GSM-7 character set (English letters, numbers and common symbols). If your message is longer, it is split into multiple segments, each billed separately. Longer messages also lose a few characters per segment for the header that joins the parts together, so a two-part message holds 306 GSM-7 characters rather than 320.

For example, a 200-character English reminder is billed as two SMS. Trimming it to 155 characters halves the cost of that campaign.

2. Hindi and regional languages cost more per word

Messages in Hindi, Marathi, Tamil, Bengali or any other script that GSM-7 does not cover use Unicode (UCS-2) encoding. A Unicode segment holds only 70 characters, or 67 per segment in multi-part messages. The same reminder in Hindi might therefore need three or four segments.

Regional-language messages often perform well, especially outside the metros, so this is not a reason to avoid them. It is a reason to write them tightly and to check the segment count before you send. Even one emoji or curly quotation mark can switch an English message to Unicode, so keep an eye on special characters copied from word processors.

3. Category and route

Promotional, service and transactional messages may be priced differently, because they travel on different routes and have different delivery rules. Promotional SMS cannot reach customers who have blocked promotions and can only be delivered in the daytime window, while service and transactional messages, such as OTPs and alerts, need faster, higher-priority delivery at any hour.

When you compare quotes, make sure both providers are quoting for the same category. A low promotional rate is not comparable with an OTP rate.

4. DLT registration and compliance costs

Every business sender in India must register on a DLT platform as a Principal Entity, with registered headers and templates. Operators charge a registration fee for the entity, which varies by platform and can change. Some providers include help with registration and templates; others charge separately or leave it to you.

Compliance work has real value. Templates in the wrong category can be blacklisted, links must be whitelisted, and the PE-TM chain must be declared, or messages are rejected. Our DLT registration guide explains these steps. A provider that handles them well can save more money than a slightly lower per-message rate.

5. Are you charged for submitted or delivered messages?

This is one of the most important questions to ask. Most providers deduct credits when a message is submitted, whether or not it is delivered. Messages to invalid, inactive or DND numbers (for promotions) may still consume credits, or may be refunded, depending on the provider's policy.

Ask each provider:

Are credits deducted on submission or on delivery?
Are failed messages refunded, and in what cases?
Is DND scrubbing applied before credits are deducted?

A provider with a slightly higher rate that only charges for delivered messages can be cheaper overall for lists with many inactive numbers.

6. Delivery quality

The cheapest routes are not always the most reliable. Delays matter a great deal for OTPs: a code that arrives after two minutes may lead to abandoned logins or payments. For reminders and alerts, failed delivery means missed appointments and more support calls.

Ask for:

Real delivery reports based on operator receipts, not just "submitted" status
Typical OTP delivery times across Jio, Airtel, Vi and BSNL
Failover options if a route has problems
A trial so you can test delivery on your own numbers

7. Volume, minimum purchase and validity

Most providers price in packs, with lower per-message rates for larger packs. Before buying a big pack to get a low rate, check:

Credit validity: do unused credits expire after a few months or a year?
Minimum purchase: is there a minimum top-up or monthly commitment?
Rate locking: if operator charges rise, will your rate change mid-pack?

Buying a large pack that expires before you use it is a common way to overpay.

8. Platform, API and extra features

Some costs are not per message at all:

Access to a web panel, API or plugins for your website, CRM or e-commerce platform
Two-way SMS or long codes for replies
Short URL tracking and click reports
Scheduling, personalisation and contact management
Dedicated account management and support hours

These features can be included, charged monthly or charged as setup fees. Make sure your comparison includes the features you actually need.

9. Taxes

Prices in India are usually quoted before GST. Confirm whether quotes include or exclude GST so you compare the same numbers.

How to compare two quotes: a simple worked method

Instead of comparing rate cards, estimate your cost per delivered, useful message:

Take your typical message and count segments (English and Hindi versions separately).
Estimate monthly volume for each category (OTP, service, promotional).
Multiply segments by volume by the provider's rate for each category.
Add registration, platform and setup costs spread over 12 months.
Adjust for refund policy on failed messages and credit expiry.
Add GST.

Do the same for each provider. The cheapest headline rate often does not win.

Ways to reduce your SMS spend without hurting results

Shorten messages to stay within one segment where possible.
Clean your list regularly to remove invalid and inactive numbers.
Segment your audience so promotions go to customers likely to respond.
Use the right channel: send long, rich content through WhatsApp or RCS and keep SMS for OTPs, alerts and short reminders. Our comparison of bulk SMS vs WhatsApp in India explains when each fits.
Measure results: use tracked links so you know which campaigns pay for themselves.

Red flags in bulk SMS pricing

Rates far below the rest of the market with no explanation of routes
No delivery reports, or reports that only show "sent"
Pressure to buy very large packs with short validity
No help with DLT, or advice to register promotional content as service
No written terms on refunds, validity and support

Getting a quote from DND Teams

DND Teams provides bulk SMS from Bhopal to businesses across India, including clinics, coaching institutes, retailers, real estate developers and e-commerce brands. We quote in writing with the category, segment rules, validity, refund policy and GST clearly stated, and we help with DLT registration and template approval. Visit our bulk SMS services page, or our pages for Bhopal, Jaipur or Bengaluru, or send us your monthly volumes for a quote.

Get a custom quote

Working with clients in India, the US, UK, Canada, Australia and the UAE, DND Teams replies with a short written review and a clear quote, with no obligation. Get a custom quote for a transparent bulk SMS plan for your volumes, or message us on WhatsApp at +91 88274 09728.

Not ready for a full project? Start with our SMS pilot for US$79 (one-time, paid in advance). Price covers our setup work only. Platform, message and carrier charges are billed separately at cost. Need more? Get a custom quote. See how our pricing works for what affects your price.

Prices shown are indicative ranges in US dollars and exclude taxes and third-party charges (such as Meta or carrier fees, billed at cost) unless stated. Your price depends on your requirements; get a custom quote for an exact figure. This article is general information, not legal advice, and reflects our understanding as of October 2026.