How to Write a GSA Commercial Sales Practices Disclosure

The CSP-1 form is a mandatory disclosure of your commercial pricing practices. Learn how to document your Most Favored Customer class, discount structure, and pricing conditions.

Compliance & Operations8 min readUpdated April 12, 2026For vendors, contracts teams, and acquisition learners

Fast path

The CSP-1 form is a mandatory disclosure of your commercial pricing practices. Learn how to document your Most Favored Customer class, discount structure, and pricing conditions.

Before you start

What makes this process go smoothly

The CSP-1 form is a mandatory disclosure of your commercial pricing practices. Learn how to document your Most Favored Customer class, discount structure, and pricing conditions
Treat this as an operating-system topic, not a one-time filing task.
The strongest contractors turn this requirement into a recurring internal control.

Process map

The steps on this page

What the disclosure has to do well What weak CSP disclosures tend to look like

The Commercial Sales Practices disclosure is where many contractors discover that their pricing behavior is less organized than they thought. The form matters because it tells GSA how you actually price commercially and gives the contracting officer the baseline needed for negotiation.

What the disclosure has to do well

Explain your customer classes in a way that matches reality.
Show the discounts or pricing logic those classes actually receive.
Support the basis-of-award relationship clearly enough that post-award compliance is manageable.

What weak CSP disclosures tend to look like

Weak pattern	Why it creates trouble
Overly broad customer classes	Masks how pricing really behaves in practice
Generic discount descriptions	Does not help the CO understand the benchmark
No tie to actual commercial evidence	Makes the pricing file harder to defend

Read next: pricing rules, MFC, and pricing negotiation.

FAQ

Questions readers usually have next

When does how to write a gsa commercial sales practices disclosure become a real risk?

It becomes risky when it affects your pricing accuracy, reporting deadlines, contract scope, or ability to prove compliance during a review or audit.

Who inside the company should own this requirement?

Usually a contracts or operations lead owns the process, but finance, pricing, sales, and delivery teams often need defined supporting roles.

What is the most common mistake contractors make here?

The most common mistake is treating the requirement as occasional paperwork instead of building a repeatable internal control around it.

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