In India, "B2B customer" covers everything from a two-person trading firm that pays you over UPI to a listed conglomerate that runs a six-month procurement process. These buyers are not simply bigger or smaller versions of each other. They decide differently, pay differently, and demand a completely different sales motion from you. Picking the wrong segment to start with is the fastest way to burn your runway, so this lesson maps the three tiers and tells you where a first-time founder should begin.
The three Indian buyer segments
India has an official size framework that gives you useful shorthand. Under the revised MSME classification notified on 21 March 2025 and effective from 1 April 2025, an enterprise is Micro, Small, or Medium based on both investment and annual turnover (both conditions must hold, and exports are excluded from turnover):
- Micro: investment up to Rs 2.5 crore, turnover up to Rs 10 crore.
- Small: investment up to Rs 25 crore, turnover up to Rs 100 crore.
- Medium: investment up to Rs 125 crore, turnover up to Rs 500 crore.
For sales purposes, treat Micro and Small firms as your SMB segment, Medium firms as mid-market, and anything above the Medium band (large corporates, listed companies, and the India arms of multinationals) as enterprise.
How the sales motion changes
SMB: The owner is usually the only decision-maker. Deals are small, price sensitive, and can close in a single call or over a few days once you earn trust. The catch is volume: low deal sizes and higher churn mean you need many customers to build meaningful revenue, and founder-led selling does not scale to hundreds of tiny accounts on its own.
Mid-market: You now sell to two or three people, typically a functional head plus the promoter or finance. Expect a demo and often a paid pilot, a cycle of a few weeks to a couple of months, and light procurement. Deal sizes are large enough to sustain the business while still letting you, the founder, close personally.
Enterprise: You face a buying committee spanning the business owner, procurement, legal, information security, and finance. Cycles commonly run several months and involve RFPs, security reviews (ISO 27001, SOC 2, VAPT reports), a master service agreement, vendor empanelment, and payment terms of 60 to 90 days. Contracts are large and sticky, but the process will outlast a young startup's cash unless you are already prepared.
Two India-specific realities
GST is table stakes. Mid-market and enterprise buyers need a proper GST invoice to claim input tax credit, so most will not transact with an unregistered vendor. Registration becomes mandatory once turnover crosses Rs 40 lakh for goods or Rs 20 lakh for services in normal category states (Rs 20 lakh and Rs 10 lakh in special category states), and immediately for any inter-state sale of goods, regardless of turnover.
The 45-day payment rule can work in your favour. Under Section 15 of the MSMED Act read with Section 43B(h) of the Income Tax Act (effective from Assessment Year 2024-25), a buyer must pay a Udyam-registered Micro or Small enterprise within 45 days where there is a written agreement, or within 15 days where there is none, or lose the tax deduction on that expense for the year. If you register on Udyam, larger buyers gain a real incentive to clear your invoices on time.
Which should you start with?
Start where the decision-maker is reachable and the cycle is short enough to learn fast, which usually means lower mid-market or SMBs that have a genuine budget. One or two people decide, the deal is big enough to matter, and you can close it yourself in weeks. This lets you march toward your first 100 customers while still discovering what your product is truly worth. Avoid leading with pure enterprise: the long cycles, certifications, and reference checks will drain your runway before you have proof. Equally, do not lean only on the smallest micro accounts, where thin prices and churn make the math impossible for a founder closing one deal at a time. Win the middle first, collect those logos and case studies, then move up to enterprise once your product, certifications, and cash position can survive the wait.