What is a sales funnel?
A sales funnel is the set of stages a buyer passes through, from first hearing of you to signing, with a count of how many people reach each stage. Many enter at the top and few come out as customers, which is why it is drawn as a funnel. Its job is to show where you lose people, so you know which stage to fix.
The marketing part of the funnel covers strangers becoming leads: visits, sign-ups, replies to outreach. The sales part covers leads becoming customers: qualified conversations, proposals, signatures. A small team usually runs both, so it helps to track them on one sheet.
A funnel counts buyers. A pipeline lists open deals and what you must do next on each one; our sales pipeline definition covers that side. If you are unsure which one you are looking at, the difference between a sales funnel and a pipeline is set out side by side.
What are the 5 stages of a sales funnel?
One common way to split a B2B funnel uses five stages: lead, marketing qualified lead (MQL), sales qualified lead (SQL), opportunity and closed won. These are the definitions First Page Sage, a marketing agency, uses in its 2026 sales funnel benchmark report (updated 10 August 2026):
| Stage | What has happened (First Page Sage's definition, shortened) | What a small team counts |
|---|---|---|
| Lead | A real contact known to you who has not yet shown clear intent to buy | New contacts this month, by source |
| MQL | Has shown clear buying interest and can afford it, not yet qualified by sales | Replies or form fills that mention the problem |
| SQL | Has had services and pricing described and wants to continue, or is qualified by sales | First calls held with a good-fit buyer |
| Opportunity | Has a proposal or contract in hand and is actively considering it | Proposals out |
| Closed won | Has signed, before the first payment | New customers |
Tools name the stages differently. HubSpot's help page on lifecycle stages lists eight defaults in order: Subscriber, Lead, Marketing Qualified Lead, Sales Qualified Lead, Opportunity, Customer, Evangelist and Other. The same page says HubSpot's automatic updates only move a record's stage forward, so a lead that goes cold stays at its highest stage unless the stage is cleared, by hand or by a workflow, or set to an earlier stage by hand. Check how your own CRM behaves before you trust its funnel report.
Pick one definition per stage, write it at the top of your sheet, and keep it for a quarter. Changing definitions mid-quarter means this quarter's rates can't be compared with last quarter's.
What conversion rates should you expect at each stage?
For B2B SaaS, First Page Sage's 2026 report gives 39% from lead to MQL, 38% from MQL to SQL, 42% from SQL to opportunity and 37% from opportunity to closed. The report draws on its own and anonymised client data from 2017 to 2025, from a client base it describes as about 65% B2B companies. It does not give a sample size, so treat the numbers as one agency's averages.
Chained together, those four rates turn 1,000 leads into about 23 customers. Our arithmetic: 1,000 × 0.39 = 390 MQLs; 390 × 0.38 = 148 SQLs; 148 × 0.42 = 62 opportunities; 62 × 0.37 = 23 customers, about 2.3% of leads. That assumes the same group of leads moves through every stage, which real months rarely do.
The better benchmark is your own last quarter. Count each stage, divide each by the one before, and track whether those rates rise or fall month to month.
What is the 10-3-1 rule in sales?
The 10-3-1 rule says that 10 qualified prospects lead to about 3 booked meetings and 1 sale. It comes from life insurance selling: in a 2014 Insurance Portal article, Jim Ruta, coach and president of Advisorcraft, defines qualified prospects as people you know have a need and can buy, and says the sale comes over time, not immediately. That is 30% from prospect to meeting and 33% from meeting to sale. It is an old rule of thumb from another industry, so replace it with your own rates as soon as you have a month of data.
Its real use is working backwards from a target. Here is a worked example for a sample company, Northwind Ltd, which wants 4 new customers a month:
| Method | Arithmetic | What Northwind needs each month |
|---|---|---|
| 10-3-1 rule | 4 sales × 3 = 12 meetings; 12 ÷ 3 × 10 = 40 | 40 qualified prospects, 12 meetings |
| First Page Sage B2B SaaS rates | 4 ÷ 0.37 = 10.8 opportunities; ÷ 0.42 = 25.7 SQLs; ÷ 0.38 = 67.7 MQLs; ÷ 0.39 = 173.7 | About 174 leads |
The two answers differ because they start at different stages: 10-3-1 starts with prospects you have already qualified, while the report starts with every lead. Either way the lesson is the same. If Northwind can only start 20 real conversations a month, 4 customers is not a realistic target until a later stage converts better.
What are the 7 stages of sales?
The 7 stages of sales describe what the seller does, while the funnel counts what the buyer has done. The open textbook The Power of Selling by Dr. Michelle Clement, reproduced in an eCampusOntario sales textbook chapter, lists them as:
- Prospecting and qualifying
- Pre-approach (research before contact)
- Approach
- Presentation
- Handling objections
- Closing the sale
- Following up
The chapter notes that follow-up leads back to step one through new needs and referrals. Map the two lists together and you know whose job each stage is: prospecting fills the lead and MQL stages, the approach and presentation move SQLs to opportunities, and closing moves opportunities to won.
Does a B2B buyer move through the funnel in order?
Not neatly, because most buyers would rather do their research without a salesperson. In a Gartner survey of 632 B2B buyers run from August to September 2024, 61% said they prefer an overall rep-free buying experience, and 73% said they actively avoid suppliers who send irrelevant outreach. Gartner reports that most buyers prefer to research independently through digital channels, though the same release says buyers still prefer a seller's input when judging whether a product fits their company's needs.
Two practical points follow. First, more volume at the top is not free: irrelevant messages push people out of the funnel. Our lead scoring framework for small teams helps you spend outreach on people who fit. Second, some of that research happens on your website, where you can measure it. Google Analytics 4 can show that part: its funnel exploration help page describes open funnels, where users can enter at any step, and closed funnels, where they must start at the first step. Use a closed funnel for a fixed path such as pricing page to demo form.
How do you find the leak in your funnel this week?
Use one sheet with a row per month and a column per stage, then compute the rate between each pair of stages. Here is a sample month for Northwind Ltd:
| Stage | Count | Rate from previous stage |
|---|---|---|
| People contacted or new inbound leads | 200 | - |
| Replied with interest | 18 | 18 ÷ 200 = 9% |
| First call held | 9 | 9 ÷ 18 = 50% |
| Proposal sent | 4 | 4 ÷ 9 = 44% |
| Won | 1 | 1 ÷ 4 = 25% |
Fix one stage at a time, starting with the one that fell furthest against your own previous month. If replies dropped, look at who you contacted and why. If calls stopped turning into proposals, our guide to running a weekly pipeline review gives the questions to ask about each deal. For the step-by-step set-up, see how to build a sales funnel.
If the top of your funnel is the weak point, Siela's Lead Finder scores each lead hot, warm or cold with a one-line reason and saves it to the built-in CRM, in its own group for each run, so your lead and MQL counts start from a known source.
Frequently asked questions
What are the parts of a sales funnel?
A sales funnel has a top, where strangers become leads through content, ads, referrals or outreach; a middle, where leads show interest and are qualified; and a bottom, where qualified buyers get a proposal and decide. Each part needs its own number, such as new leads, qualified conversations and proposals, so you can see which part is losing people.
Is a marketing funnel the same as a sales funnel?
They overlap. A marketing funnel usually ends when someone becomes a qualified lead and is handed to sales, while a sales funnel runs on to the signed deal. In a small B2B team the same person often owns both halves, so tracking them as one funnel on one sheet avoids losing people at the handover.
What is a good sales funnel conversion rate?
There is no single good rate, because stage definitions change the numbers. One agency's 2026 report gives B2B SaaS about 2.3% from lead to customer when its four stage averages are multiplied together. A better test is whether each of your own stage rates is rising month on month with the same definitions.
How many stages should a sales funnel have?
Four to six is enough for most small teams: new leads, interested replies, first calls, proposals and won deals. Each stage should be something the buyer did, which you can count without guessing. Add a stage only when you need to act differently on the people in it.
Do you need software to run a sales funnel?
Not at first. A spreadsheet with one column per stage and a row per month is enough while volumes are small. Move to a CRM once you need reminders, several people update the same leads, or you want stage counts without counting by hand.
Sources
- First Page Sage: Sales Funnel Conversion Rate Benchmarks, 2026 Report (checked 5 Nov 2026 (updated 10 Aug 2026))
- First Page Sage: MQL to SQL Conversion Rate by Industry, 2026 Report (checked 5 Nov 2026)
- Gartner: Sales survey finds 61% of B2B buyers prefer a rep-free buying experience (25 Jun 2025, checked 5 Nov 2026)
- eCampusOntario Pressbooks: 3.3 The Seven Steps of Selling (checked 5 Nov 2026)
- HubSpot Knowledge Base: Use lifecycle stages (checked 5 Nov 2026)
- Google Analytics Help: [GA4] Funnel exploration (checked 5 Nov 2026)
- Insurance Portal: Persistence drives success of 10-3-1 formula (Jim Ruta) (23 Apr 2014, checked 5 Nov 2026)