diff --git a/src/recipes/product-support/skills/echo-readonly-postgres/skill.md b/src/recipes/product-support/skills/echo-readonly-postgres/skill.md
index b6086f2..c904e83 100644
--- a/src/recipes/product-support/skills/echo-readonly-postgres/skill.md
+++ b/src/recipes/product-support/skills/echo-readonly-postgres/skill.md
@@ -146,6 +146,34 @@ PGOPTIONS="-c default_transaction_read_only=on -c statement_timeout=15000" \
 - **Participant Speech is Personal Data (PII):** Use this dialogue locally in your session context to understand the *why* and *who*.
 - **Never paste raw transcript dialogue into Slack** unless it is an internal developer/test conversation or has zero PII. Instead, summarize the findings or quote the specific key technical phrases anonymously (e.g., "The host confirmed they want to migrate database hosts from DO to OVHcloud").
 
+## SaaS Revenue Queries & MRR Reporting
+
+When calculating active subscriptions and Monthly Recurring Revenue (MRR) metrics from the `billing_account` table:
+
+### Exclude Internal and Test Organizations
+
+- **CRITICAL RULE:** Internal and test organizations (such as Jorim Theuns' internal subscription or test organizations created for development) must **never** be counted in any revenue, MRR, or checkout numbers posted to the team (such as in `#alerts-revenue_updates` or `#revenue`).
+- **How to display:** If you want internal/test accounts visible at all, you must put them on their own separate lines below, clearly marked as internal and excluded from the total. Headline the post using the true self-serve customer MRR only.
+- **Why this matters:** Revenue channels exist as a morale signal, meaning these figures get quoted onward, remembered, and relied upon. Presenting inflated numbers (even by a small amount like €86) damages the credibility of *every* figure posted afterwards if someone notices the inflation later. It is always better to under-claim and be trusted than to over-report.
+
+### Typical Billing Queries
+
+Use this query format to view active paying subscriptions and filter out known internal/test organizations:
+
+```sql
+SELECT 
+  ba.id AS billing_account_id,
+  o.name AS org_name,
+  ba.seats,
+  ba.amount_mrr
+FROM billing_account ba
+JOIN org o ON o.id = ba.org_id
+WHERE ba.status = 'active'
+  -- Exclude known test and internal subscriptions
+  AND o.name NOT LIKE '%test%'
+  AND o.name NOT IN ('Jorim Theuns', 'Sameer Test');
+```
+
 ## Operator-authorized writes (the override)
 
 Reads-only is the default, not an absolute. A write is allowed when —