B2B market segmentation: how to segment your market with firmographics

B2B market segmentation splits the companies you could sell to into groups that buy for the same reasons and in the same way, so you can choose which group to win first. The most reliable starting point is firmographics: industry, company size, location, revenue and ownership, because every one of them can be counted.

This guide covers the six types of B2B segmentation, the firmographic variables that matter, a six-step method, and a worked example that segments 49,252 US IT services firms down to a first list of 374 buyers.

What is B2B market segmentation?

B2B market segmentation is the process of dividing the businesses in your market into groups that share traits, needs and buying behavior, then ranking those groups by how attractive and winnable they are. Each group gets its own message, channel and priority.

Segmentation sits between two other tools. An ideal customer profile describes the single best-fit customer, and a buyer persona describes the person who signs. Segmentation maps the whole market around them, so you know which slice to work this quarter and which to leave for later.

The 6 types of B2B segmentation

There are six types of B2B segmentation: firmographic, technographic, needs-based, behavioral, intent and value-based. Most teams use two or three together, starting with firmographics because they are the easiest to count for the whole market.

Type	Groups companies by	Example	Where the data comes from
Firmographic	Industry, size, location, revenue, ownership	IT services firms with 10 to 49 employees	Census, company data
Technographic	Tools they run	Firms on a given PSA or CRM	Technographic data
Needs-based	The problem they need solved	“Too many client reports built by hand”	Interviews, win and loss notes
Behavioral	How they buy and use products	Buys monthly, starts with a pilot	Your CRM and product data
Intent and signals	What they are doing right now	Hiring, funding, researching your category	B2B intent data, trigger events
Value-based	What they are worth to you	Tier A, B, C by expected ACV	Your revenue data

Firmographics tell you who could buy. The other five tell you who will buy, when and for how much. For the timing layer, keep a list of B2B buying signals next to your segments.

Firmographic variables that drive B2B segmentation

Five firmographic variables do most of the work in B2B segmentation: industry, company size, location, revenue and ownership. Pick the two or three that change how your customers buy, not the ones that are easiest to fill in.

Variable	What it tells you	US source	Watch out
Industry (NAICS code)	The problem, the vocabulary, the competitors	Census SUSB by NAICS	Codes group by what a firm does, not who it sells to
Company size (employees)	Budget, number of buyers, process	Census SUSB size bands	Bands differ between sources
Location (state, metro)	Time zone, field reach, local rules	Census SUSB by state	A multi-state firm counts in each state
Revenue (receipts)	Ability to pay	Census SUSB receipts (2022)	Averages hide wide ranges
Ownership	Who signs and which rules apply	Associations, filings	Rarely in generic databases

Our guide to firmographic data goes field by field on how far to trust each one.

Ownership in practice: three kinds of US hospital

Ownership is the variable teams forget, and it can change the whole sales motion. The American Hospital Association counts 5,121 US community hospitals: 2,984 nonprofit, 1,224 investor-owned and 913 run by state or local government (AHA Fast Facts, 2026).

Same industry, same size band, different buying process. A county hospital may need a public bid, an investor-owned hospital may buy through its parent system, and a nonprofit may run its own committee. If you sell to hospitals, ownership is one of your first two variables.

How to segment a B2B market in 6 steps

Segmenting a B2B market takes six steps: start from the customers you win, pick the variables, count each cell, add revenue and buyers, score the cells, then write the winner as one sentence.

1. Start from the customers you already win

List your 10 to 20 best customers with their industry, size, state and ownership. The variables where they cluster are your candidates. Lookalike companies are the accounts that share those traits.

2. Pick two or three variables that change how companies buy

A variable earns its place only if companies on either side of it need a different message, price or sales motion. Two variables with four values each give 16 cells, which is plenty.

3. Count the accounts in each cell

For US companies, the Census Bureau’s Statistics of U.S. Businesses (SUSB) gives employer firms by NAICS code, state and size band. The 2022 tables, released in April 2025, are the latest. The same cells, added up, give you the account counts behind your TAM, SAM and SOM.

4. Add revenue per account and reachable buyers

SUSB 2022 also reports receipts, the Census word for revenue, so you can divide receipts by firms for each band. Then run a people count for your buyer’s title in each cell. The total addressable market guide shows how to pick the right unit to count.

5. Score every cell

Score each cell from 1 to 3 on four things: number of accounts, ability to pay, reachable buyers and product fit. Write one line on why you gave each score, so the next person can challenge it.

6. Pick one beachhead and write it as one sentence

The top cell becomes your beachhead segment. Write it as one sentence with the buyer’s title, industry, location and size. If you cannot, the segment is not defined yet.

B2B market segmentation example: US IT services firms and MSPs

Here is the method on a real market. Patchwell is a fictional San Antonio, Texas startup that sells a client-reporting and patch-compliance tool to managed service providers (MSPs). Its segment scores are example inputs; the counts are real.

The market: 49,252 firms in one Census code

Census has no code for MSPs. Most are classified in NAICS 541512, Computer Systems Design Services, or 541513, Computer Facilities Management Services. The larger one, 541512, counted 49,252 US employer firms in 2022; 541513 adds 4,950. Code 541512 also includes IT consultancies and integrators, so treat it as the outer edge of the market.

Two variables: company size and state

Patchwell picks company size (it sets who buys and how much they can pay) and state (it sells in person first). Here is the size cut, with revenue from Census and buyers from a Scalelist people count on 27 September 2026.

Employees	US firms (2022)	Avg receipts per firm	Decision makers mentioning managed services
Under 10	42,519	0.55 million USD	3,601
10 to 49	4,770	5.9 million USD	4,901
50 to 199	1,224	25.4 million USD	3,765
200 to 499	310	70.6 million USD	2,052
500+	429	404.4 million USD	not counted

Firms and receipts: US Census Bureau, SUSB 2022, NAICS 541512; averages are our calculation. People counts use the nearest Scalelist bands (up to 10, 11 to 50, 51 to 200, 201 to 500 employees), so never add them to the Census columns.

The wording of a segment decides its size. Without the “managed services” keyword, the same count returns 68,363 decision makers at US IT services companies with 11 to 50 employees: 14 times more, most of them at firms that are not MSPs.

Scoring the cells

Patchwell scores each size band from 1 to 3 on accounts, ability to pay, reachable buyers and fit.

The 10 to 49 band wins. In Patchwell’s read, these firms are big enough to need client reporting and to pay for it, and small enough that the owner still signs. The largest cell, under 10 employees, is a trap: 42,519 firms averaging 0.55 million USD in receipts.

The beachhead: Texas first

Texas has 6,169 firms in code 541512, second only to California’s 7,134, and 596 of them have 10 to 99 employees. A firm with offices in several states is counted in each state, so state counts do not add up to the US total.

On 27 September 2026, decision makers at Texas IT services companies with 11 to 50 employees whose profiles mention managed services returned 374 people. That is one rep’s quarter, and it is Patchwell’s beachhead. For the outreach itself, see our MSP lead generation playbook.

Write each segment on one card

Copy this card for every segment you keep. It holds the four numbers and the sentence you will search with.

Common B2B segmentation mistakes (and the fix)

Most B2B segmentation fails in one of four ways. Each has a quick fix.

Segments nobody can count

“Innovative, growth-minded mid-market companies” cannot be counted, searched or handed to a rep. Fix: every variable in a segment must be something a dataset or a people search can return.

Chasing the biggest cell

The biggest cell is rarely the best one. In the example, the under-10 band holds 86% of the firms and the least revenue per firm. Fix: score ability to pay and fit next to size, and let the total decide.

Mixing bands and sources

Census counts 10 to 49 employees; most data tools count 11 to 50. State counts include multi-state firms more than once. Fix: write the band and the source next to every number, and never add numbers from different sources.

Scoring once and never again

Your first scores are guesses. Fix: after one quarter, replace them with real reply, meeting and win rates per segment, and re-rank. Track them with your outbound sales metrics.

Best practices for B2B segmentation

A good segment passes six tests before anyone sells into it. The first five are the classic marketing-textbook criteria; the last one is what makes it usable by a sales team.

• Keep 3 to 6 active segments. More than that and no segment gets enough attempts to measure.
• Give each segment its own first line and its own proof, not just a new name in the same email.
• Re-count every segment each quarter; people counts move month to month.

What to look for in a segmentation tool

To segment and then work a B2B market, you need a count for every cell and a way to turn the winning cell into people. Look for a tool that:

• Counts people by title, seniority, industry, company size and location at no cost, before you buy contacts.
• Understands a plain-English description of the segment and shows what it understood.
• Returns verified work emails and mobile numbers for the segment you pick, and charges only for what it finds.
• Exports to CSV or pushes to HubSpot so each segment lands in its own list.

How Scalelist helps you turn a segment into a list

Scalelist, an AI Lead Finder, sizes each segment at no cost and then returns the people in the one you choose, with verified work emails and mobile numbers.

You describe the segment in one sentence. Scalelist’s Lead Finder shows what it understood and how many people match before you spend a credit. Change one word, and you see how the segment moves.

Patchwell’s beachhead of 374 decision makers costs at most 8,228 credits to work in full: 1 per lead, 1 per email and 20 per mobile found, 0 for a miss. That fits the Scaler 10K plan at 349 USD a month (see Scalelist pricing).

Scalelist finds and verifies contact details on demand rather than serving a pre-compiled list.

FAQ

What is B2B market segmentation?

B2B market segmentation is dividing the businesses you could sell to into groups that share traits, needs and buying behavior, then ranking the groups by how attractive and winnable they are. Each group gets its own message and priority. Most teams start with firmographics such as industry, company size and location, because they can be counted for the whole market.

What are the main types of B2B segmentation?

The six main types of B2B segmentation are firmographic (industry, size, location, revenue, ownership), technographic (tools used), needs-based (the problem to solve), behavioral (how they buy), intent and signals (what they are doing now) and value-based (what they are worth to you). Firmographics define who could buy; the others add why, when and how much.

What is firmographic segmentation?

Firmographic segmentation groups companies by traits such as industry, employee count, location, revenue and ownership. It is the B2B version of demographic segmentation. It is the easiest type to start with because the variables are public and countable: the US Census counts employer firms by industry, state and size band every year.

How many segments should a B2B company have?

Most B2B teams should work 3 to 6 active segments at a time, with one beachhead getting most of the effort. Fewer than three leaves you guessing about what else works; more than six spreads outreach so thin that no segment produces enough replies to measure. Park the rest and re-score them each quarter.

What is the difference between market segmentation and an ICP?

An ideal customer profile describes your single best-fit customer. Market segmentation maps the whole market into groups and ranks them. You use the ICP to decide which variables matter, and segmentation to decide which group to sell to first. In practice your top segment is usually the ICP, written with counts attached.

What is a good B2B market segmentation example?

A software company selling to MSPs splits 49,252 US IT services firms by size: under 10, 10 to 49, 50 to 199 and 200 to 499 employees. It adds average revenue per firm from the Census and buyer counts from a people search, scores each band, then narrows the winner to Texas. The result is a beachhead of 374 named decision makers.

Where can I get firmographic data for US companies?

For counts, use the Census Bureau’s Statistics of U.S. Businesses (SUSB), which reports employer firms, establishments, employees and receipts by industry, state and size band; 2022 is the latest year. For the people inside those companies, use a people search that shows how many match a description before you pay, such as Scalelist’s Lead Finder.

Does Scalelist charge to size a segment?

No. Sizing a search in Scalelist is free: you see how many people match before you spend a credit. Credits are charged only when something is found: 1 per lead, 1 per email and 20 per mobile number. A miss costs 0, and new accounts get 20 free credits with no credit card required.

Sources

• US Census Bureau: 2022 SUSB annual data tables
• US Census Bureau: SUSB 2022, US and states by detailed employment size (xlsx)
• US Census Bureau: SUSB 2022, US and states by 6-digit NAICS (xlsx)
• US Census Bureau: SUSB glossary
• American Hospital Association: Fast Facts on U.S. Hospitals, 2026
• Scalelist people count (POST /api/v1/people/count), queried 27 September 2026, 0 credits.