Demand Waterfall

The Demand Waterfall is a framework (created by SiriusDecisions, now Forrester) that defines the stages a lead or demand unit moves through from first interaction to closed revenue. It gives marketing, sales, and RevOps a shared language, clear stage definitions, and measurable conversion points across the funnel.

Classic Demand Waterfall Stages

1. Inquiry

A person responds to marketing by taking an action such as filling out a form, downloading content, or registering for an event. This is the initial hand-raise that creates a new lead or contact in the system.

1. Marketing Qualified Lead (MQL)

The inquiry meets predefined scoring thresholds for fit (e.g., firmographic/role criteria) and engagement (e.g., activity level). Marketing flags this lead as ready for sales follow-up.

1. Sales Accepted Lead (SAL)

Sales reviews the MQL and explicitly agrees to work it, confirming it’s worth pursuing. This stage ensures alignment and prevents unworked MQLs.

1. Sales Qualified Lead (SQL)

Through discovery, sales confirms the lead represents a real, qualified opportunity (e.g., confirmed need, budget, authority, timeline). The lead typically becomes an opportunity in the CRM.

1. Close

The opportunity is won and recognized as revenue.

Why the Demand Waterfall Matters

• Establishes a shared vocabulary between marketing and sales for lead stages.
• Creates clear criteria for when a lead is ready to move from marketing to sales.
• Enables conversion tracking at each stage to see where leads stall or leak.
• Improves accountability: marketing is measured on quality and volume of MQLs; sales is measured on follow-up and progression.

Evolved: The Demand Unit Waterfall

The original model was linear and focused on individual leads. SiriusDecisions later introduced the Demand Unit Waterfall, which:

• Focuses on buying groups (multiple stakeholders) rather than single leads.
• Supports account-based and lead-based motions together.
• Allows multiple entry points into the funnel, not just top-of-funnel inquiries.

This better reflects modern B2B buying, where decisions are made by groups within accounts and engagement can start at many points.

Typical Waterfall Conversion Metrics

Benchmarks often used for B2B funnels:

• Inquiry → MQL: ~5–15%
• MQL → SAL: ~50–70%
• SAL → SQL: ~40–60%
• SQL → Close: ~20–35%

These ranges help teams gauge whether their funnel health and stage definitions are reasonable and where optimization is needed.

RevOps Application

Revenue Operations (RevOps) typically owns the operationalization of the Demand Waterfall by:

• Defining stage criteria in partnership with marketing and sales.
• Configuring the CRM (and MAP) to capture stage transitions and timestamps.
• Building funnel reports to show volume, velocity, and conversion at each stage.
• Analyzing leakage (where leads drop out or stall) to prioritize process or program improvements.
• Supporting forecasting by understanding how many leads at each stage are likely to progress to revenue based on historical conversion rates.

In practice, the Demand Waterfall becomes the backbone of funnel reporting, performance diagnostics, and revenue predictability across the go-to-market engine.