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Below is a (mostly) comprehensive list of Ferengi Rules of Acquisition drawn from both on‐screen sources and extended, non‑canonical reference texts. Each entry shows the rule’s number, a short description of its meaning, the source where it is found, and whether it is canonical-as seen in Star Trek: Deep Space Nine and related series-or non‑canonical, from expanded lore and fan publications.

Canonical Rules (On‑Screen in DS9 and Official Sources)

1. Rule 1: “Once you have their money, you never give it back.”
   • Description: Money earned is to be kept.
   • Source: Deep Space Nine episodes (e.g. “The Nagus”) and Memory Alpha.
   • Canonical: Yes.
2. Rule 6: “Never allow family to stand in the way of opportunity.”
   • Description: Family ties must never hinder profit.
   • Source: DS9 dialogue and Ferengi lore.
   • Canonical: Yes.
3. Rule 9: “Opportunity plus instinct equals profit.”
   • Description: A keen gut converts chance into gain.
   • Source: DS9 segments and Ferengi reference texts.
   • Canonical: Yes.
4. Rule 10: “Greed is eternal.”
   • Description: The pursuit of profit endures.
   • Source: DS9 and official Ferengi guides.
   • Canonical: Yes.
5. Rule 16: “A deal is a deal.”
   • Description: Once set, an agreement must stand.
   • Source: DS9 discussions with Quark and other Ferengi.
   • Canonical: Yes.
6. Rule 17: “A contract is a contract is a contract.”
   • Description: The written word holds firm.
   • Source: Frequently quoted in DS9 and Ferengi texts.
   • Canonical: Yes.
7. Rule 21: “Never place friendship above profit.”
   • Description: Business comes before personal ties.
   • Source: DS9 episodes such as “The Nagus.”
   • Canonical: Yes.
8. Rule 22: “A wise man can hear profit in the wind.”
   • Description: Opportunity is sensed even in faint hints.
   • Source: DS9 and Ferengi reference literature.
   • Canonical: Yes.
9. Rule 34: “War is good for business.”
   • Description: Conflict opens paths to gain.
   • Source: On‑screen dialogue in DS9.
   • Canonical: Yes.
10. Rule 35: “Peace is good for business, but war is better.”
    • Description: Calm yields profit, yet strife often brings more.
    • Source: DS9 and Ferengi lore.
    • Canonical: Yes.
11. Rule 45: “Expand or die.”
    • Description: Growth is key to survival.
    • Source: DS9 and official Ferengi texts.
    • Canonical: Yes.
12. Rule 59: “Free advice is seldom cheap.”
    • Description: Even no‐cost counsel carries a price.
    • Source: DS9 and Ferengi manuals.
    • Canonical: Yes.
13. Rule 94: “Females and finances don’t mix.”
    • Description: Ferengi tradition holds that women disrupt profit.
    • Source: DS9 (as originally presented).
    • Canonical: Yes (in the original series context).
14. Rule 98: “Every man has his price.”
    • Description: All can be swayed with enough coin.
    • Source: DS9 and official lore.
    • Canonical: Yes.
15. Rule 102: “Nature decays, but profit endures.”
    • Description: Material things perish; wealth remains.
    • Source: DS9 and Ferengi reference works.
    • Canonical: Yes.
16. Rule 109: “Dignity and an empty sack is worth the sack.”
    • Description: Pride without profit is worthless.
    • Source: DS9 dialogue and Ferengi manuals.
    • Canonical: Yes.
17. Rule 160: “Too many Ferengi make the Enterprise go around in circles.”
    • Description: An excess of Ferengi disrupts progress.
    • Source: DS9 discussions.
    • Canonical: Yes.
18. Rule 285: “No good deed ever goes unpunished.”
    • Description: Acts of charity may lead to loss.
    • Source: DS9 and official texts.
    • Canonical: Yes.

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Non‑Canonical (Expanded Ferengi Lore and Fan Publications)

1. Rule 0: “Sometimes you have to walk before you can run.”
   • Description: One must master basics before moving ahead.
   • Source: Extended Ferengi reference texts.
   • Canonical: No.
2. Rule 2: “The best deal is the one that brings the most profit.”
   • Description: Maximizing gain is the true measure of a deal.
   • Source: Expanded Ferengi lore.
   • Canonical: No.
3. Rule 3: “Never spend more for an acquisition than you have to.”
   • Description: Keep costs low to boost profit.
   • Source: Non‑canonical texts.
   • Canonical: No.
4. Rule 7: “Keep your ears open.”
   • Description: Listen for hints of profit.
   • Source: Expanded Ferengi guides.
   • Canonical: No.
5. Rule 8: “Sometimes the best deal is no deal at all.”
   • Description: Decline offers that lack profit.
   • Source: Non‑canonical sources.
   • Canonical: No.
6. Rule 11: “Latinums aren’t the only gold in the galaxy.”
   • Description: Profit can come in forms other than latinum.
   • Source: Extended lore and fan compilations.
   • Canonical: No.
7. Rule 12: “Anything worth doing is worth doing for money.”
   • Description: Profit is the measure of value in all ventures.
   • Source: Non‑canonical Ferengi texts.
   • Canonical: No.
8. Rule 14: “Know your enemies and know your profit.”
   • Description: Understanding rivals and opportunity aids gain.
   • Source: Extended references.
   • Canonical: No.
9. Rule 15: “Don’t trust a man wearing a better suit than your own.”
   • Description: Dress and appearance can hint at hidden costs.
   • Source: Non‑canonical lore.
   • Canonical: No.
10. Rule 18: “A Ferengi without profit is no Ferengi at all.”
    • Description: The core of Ferengi life is the pursuit of gain.
    • Source: Extended texts and fan works.
    • Canonical: No.
11. Rule 20: “He who dives for gold may lose his pants.”
    • Description: Greed can lead to costly risks.
    • Source: Expanded Ferengi literature.
    • Canonical: No.
12. Rule 23: “Time is money.”
    • Description: The use of time must be measured in gain.
    • Source: Non‑canonical texts.
    • Canonical: No.
13. Rule 24: “Never trust a cloaked being.”
    • Description: Hide or secrecy may hide untrustworthy intent.
    • Source: Expanded lore.
    • Canonical: No.
14. Rule 25: “If you break it, it never works again.”
    • Description: Mistakes can cost more than mere coin.
    • Source: Non‑canonical guides.
    • Canonical: No.
15. Rule 26: “The only place you get free stuff is at a birthday party.”
    • Description: Nothing is truly free; all have a cost.
    • Source: Extended reference works.
    • Canonical: No.
16. Rule 27: “There’s nothing wrong with charity… as long as it winds up in your pocket.”
    • Description: Generosity is only wise when profit follows.
    • Source: Non‑canonical lore.
    • Canonical: No.
17. Rule 28: “Morality is always defined by those with money.”
    • Description: Wealth shapes ethics.
    • Source: Extended Ferengi texts.
    • Canonical: No.
18. Rule 29: “What’s mine is mine and what’s yours is negotiable.”
    • Description: One keeps what is owned; others may be bartered.
    • Source: Expanded lore and fan compilations.
    • Canonical: No.
19. Rule 30: “Talk is cheap.”
    • Description: Words carry little worth without profit.
    • Source: Non‑canonical sources.
    • Canonical: No.

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