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How to upsell enterprise customers: a CSM playbook

The step-by-step approach I used to upsell $1.5M across enterprise accounts in four months, without a single pushy sales pitch.

By Luis Ingles · Updated November 1, 2026

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The easiest revenue you'll ever win is from a customer who already trusts you. Enterprise accounts in particular usually have far more room to grow than their first contract suggests: more teams, more regions, more use cases. The challenge is finding it and making the case. Here's the playbook I used to upsell $1.5M across enterprise accounts in four months.

Step 1: Earn the right to expand

No customer buys more of something that isn't working. Before any expansion conversation, make sure the account is healthy:

  • Onboarding is finished and the product is live.
  • The intended users are actually using it.
  • The sponsor can name a result they've gotten.
  • There are no open escalations.

If any of these fail, fix them first. The OpenAI upsell I worked on, for example, came after their partner program launched successfully on an aggressive timeline. A good launch is the best expansion pitch.

Step 2: Map the whole account

Most enterprise contracts start with one team or one use case. Draw out the rest of the company:

  • Which teams, business units or regions could use the product but don't?
  • Who else does the customer serve (partners, contractors, customers) that the product could reach?
  • Who has budget, and who influences them?

At OpenAI, for example, the platform was used to train employees and contractors, and then also to enable their partners. Each new audience was a potential expansion.

Step 3: Listen for the next goal

Customers tell you where they're going next, if you ask and listen: in business reviews, in day-to-day Slack messages, in complaints about a limit they keep hitting. Useful questions:

  • "What are you trying to achieve in the next six months?"
  • "Which teams keep asking for access?"
  • "What's the biggest thing slowing you down right now?"

When the answer is something your product can help with, that's an expansion opportunity, and it came from them.

Step 4: Build the business case with your sponsor

Your sponsor has to sell the expansion inside their company, often to someone you'll never meet. Make their job easy:

  1. Results so far: usage, outcomes and quotes from their own users.
  2. The next goal: in their words, from step 3.
  3. What expansion would achieve: specific to their teams and numbers.
  4. What it takes: cost, timeline and what's needed from their side.

A one-page summary the sponsor can forward is often more useful than a deck.

Step 5: Bring in sales at the right moment

If your company has account executives or account managers, bring them in once the opportunity is real, not before. Give them the full context: the account map, the goal, the business case and the people involved. The customer should feel one continuous relationship, not a handoff to a stranger.

A tip on timingLine expansion up with the customer's budget cycle and the renewal date. Combining them can make approval simpler, but don't let an expansion delay a renewal that's ready to sign.

Step 6: Deliver the expansion like a new launch

An upsell is a promise. Treat the new team or use case like a fresh onboarding: kickoff, plan, owners, go-live, value check. A smooth expansion launch sets up the next one.

Mistakes that kill expansion

  • Pitching an unhealthy account. It damages trust and rarely closes.
  • Leading with your product. Lead with their goal and their results.
  • Single-threading. If you only know one person, you can't map the account.
  • Waiting for the renewal. Expansion can happen any time the customer has a new goal.
  • A clumsy handoff to sales. Lost context means lost trust.

Want help expanding your accounts?

This is the work I do every day. If you want someone to run it on your customers, see expansion and upsell or hire me as a fractional CSM.

Frequently asked questions

What's the difference between upselling and cross-selling?

Upselling means the customer buys more of what they already have, like more users or a higher tier. Cross-selling means they buy a different product or add-on. Both are forms of expansion and follow the same playbook.

When is the right time to upsell a customer?

After they've seen results and when they have a new goal the product can serve: a new team, region, use case or growth target. Never while there's an open problem on the account.

Who should own the upsell, the CSM or sales?

It depends on the company. Often the CSM finds and qualifies the opportunity and builds the case, and sales or an account manager closes it. What matters is a clean handoff and one consistent relationship for the customer.

How do I upsell without damaging the relationship?

Only bring expansion when it solves a goal the customer has already told you about, and lead with their results, not your product. If it doesn't help them, don't push it.