I paid $13,000 to join my first mastermind.
I was doing $15-20K/month with my SaaS at the time, so that number hurt.
Six months later I was at $75K/month. Best money I ever spent.
But here's what surprised me. The thing that made that group work wasn't the content (okay, and the people). It was the rules.
Not 40 rules in a PDF nobody reads. A short list that everyone knew, and that actually got enforced.
I've since been in groups with no rules, and I run my own now (Profitable Founder Club, capped at 20 founders). So I've seen both sides: the group that drifts into a casual hangout, and the group where people show up prepared because they know exactly what's expected.
This is the rule set I'd use if I were starting from zero. Nine rules, plus the part most articles skip: what to do when someone breaks them.
Why most mastermind groups die without rules
Quick reality check first.
Most free mastermind groups are dead within 3 months. Not because the members are lazy. Because nobody agreed on what "being in this group" means.
One person treats it as therapy. One treats it as a lead source. Two stop showing up but stay in the Slack. The remaining members feel stupid preparing for a call half the group skips.
Rules fix this before it happens. They're not bureaucracy. They're the answer to "what did I actually sign up for?"
If you haven't formed your group yet, read my guide on how to start a mastermind group first. Rules come second. People come first.
The 9 mastermind group rules
1. Show up, or step out
Attendance is the rule everything else depends on.
My standard: you can miss 1 meeting per quarter with notice. Miss 2 in a row without notice and you're out of the group.
Harsh? Maybe. But a 6-person mastermind with 2 no-shows isn't a 6-person mastermind. It's 4 people wondering why they bothered preparing.
Decide your threshold upfront and say it out loud at the first meeting. "We meet bi-weekly, cameras on, and we expect 90% attendance" takes 5 seconds to say and saves months of resentment.
2. What's said in the group stays in the group
Without this one, none of the other rules matter.
Founders share real numbers in masterminds: MRR, churn, payroll, the co-founder fight, the acquisition offer. Nobody shares that if there's a chance it ends up in a tweet or a "did you hear about..." conversation.
The simple version: nothing leaves the room. Not to your team, not to your spouse's founder friend, not "anonymized" on X.
Some groups sign an NDA. Honestly, most don't need the paperwork. They need the norm stated clearly and one facilitator willing to call out the first violation.
3. No pitching, no selling, ever
The fastest way to kill trust in a founder group: one member starts treating the others as pipeline.
The rule: members don't sell to members. No "quick demo," no affiliate links dropped in the group chat, no DM follow-ups after someone mentions a problem your product happens to solve.
Can members buy from each other? Sure, it happens naturally. The difference is who initiates. If they ask you, great. If you pitch them, you're done.
4. Bring real numbers, not vibes
"Things are going pretty well" is useless in a hot seat.
"MRR went from $12K to $13,100, churn is stuck at 6%, and I haven't shipped in 3 weeks" is something the group can work with.
Make specificity a rule: every update includes actual numbers. Revenue, users, runway, whatever fits the stage. Once vague updates become normal, your mastermind quietly turns into a networking call.
This is also a filter. Founders who won't share numbers with 5 peers under confidentiality usually aren't ready for a mastermind.
5. Everyone talks, nobody dominates
Every group has a talker. (No shade, I was one once.)
Without a rule, the loudest member gets 40% of the airtime and the quietest gets none. Both lose: one gets no pushback, the other gets no help.
Two mechanics fix this:
→ Timed hot seats. In my group we solve 3 member problems per call, roughly 20 minutes each, timer visible.
→ The facilitator's one job: redirect. "Great point, let's hear from Sarah" is not rude. It's the job.
I wrote a full breakdown of the format in my mastermind group agenda post, with minutes attached to each segment.
6. Advice is optional, commitments are not
Here's a distinction most groups get wrong.
Nobody has to take the group's advice. You know your business better than anyone on the call. Ignoring a suggestion is fine.
But when you say "by next call I'll have launched the new pricing," that's a commitment. And the group's rule is to check it, every time, first thing.
The magic of a mastermind isn't the ideas. It's saying a deadline out loud to 5 people who will ask about it in 2 weeks. Groups that skip the follow-up lose their entire reason to exist.
7. Full attention or don't come
Cameras on. Phones away. No Slack in another tab.
Sounds obvious. It isn't. Founders are the worst multitaskers on earth ("sorry, just shipping a hotfix") and one visible half-listener drops the energy of the whole call.
The rule I like: if something's on fire and you genuinely can't be present, skip the call and use your quarterly pass. A missed call hurts less than a distracted one.
8. No direct competitors in the same group
You can't be fully honest about your roadmap while your competitor takes notes.
Keep the group competitor-free. Adjacent is fine (two B2B SaaS founders in different niches make great peers). Same ICP and same product category is not.
Handle this at admission, not after. It's the facilitator's job to screen for it, which is one reason applications beat open doors.
9. The facilitator decides who's in and who's out
Somebody has to own membership. Adding people, integrating them, and yes, removing them.
Make it explicit from day one: this group has a facilitator, and membership decisions are theirs (with group input, but not group votes). Democracies are great for countries and terrible for 6-person masterminds, because nobody wants to publicly vote out a peer.
If you're the facilitator, this rule feels uncomfortable. It's still better than the alternative: a group slowly dying because nobody had the authority to fix it.
What to do when someone breaks a rule
This is the part the checklists skip, and it's where groups actually live or die.
My escalation path, in order:
- Name it in the moment, lightly. "Phones away, remember?" Most violations end here. Social pressure in a small group is powerful.
- One-on-one after the call. Second offense gets a private message. Not a warning letter. A real question: "You've missed 2 calls, is this still a priority for you?" Half the time they're relieved you asked, because they were embarrassed to quit.
- Removal. Third strike, they're out. Do it privately, kindly, and fast. Refund the unused portion if it's a paid group.
One rule of thumb: every month you tolerate a rule-breaker, you lose a little of everyone else's trust. The group is always watching what you let slide.
A copy-paste rule set for your first meeting
Steal this. Read it out loud at meeting one, ask everyone to agree on the call, drop it in your group doc.
- We meet every 2 weeks. You can miss 1 call per quarter, with notice.
- Nothing shared here leaves the group. No exceptions.
- No selling to members. If someone wants what you make, they'll ask.
- Every update includes real numbers.
- Hot seats are timed. The facilitator keeps them on track.
- Advice is optional. Commitments get checked at the start of every call.
- Cameras on, phones away.
- No direct competitors admitted.
- The facilitator owns membership decisions.
That's under 100 words. You don't need a constitution. You need 9 sentences and the will to enforce them.
FAQ
How many rules should a mastermind group have?
Somewhere between 5 and 10. Fewer than 5 and you haven't covered the basics (attendance, confidentiality, no selling, accountability). More than 10 and nobody remembers them, which means nobody enforces them. My list is 9, and rule 1 and rule 2 do most of the work.
What is the most important mastermind group rule?
Confidentiality. Every other rule can be recovered from if it slips for a week. Confidentiality can't. The first time a member's numbers leak outside the group, the sharing stops, and a mastermind where nobody shares real numbers is just a group call. State it at every new member's first meeting.
Should mastermind members sign an NDA?
Usually no. For a peer group of 5 to 8 founders, a clearly stated confidentiality norm works, and an NDA you'd never actually litigate adds friction without adding safety. Paid programs with bigger cohorts or sensitive industries are the exception. If a signature makes members share more freely, use one.
How do you remove someone from a mastermind group?
Privately, quickly, and with a refund for any unused paid time. One conversation: "This isn't working, here's why, you're out as of today." No group announcement beyond a one-line note. Dragging it out or putting it to a vote humiliates the person and stresses everyone else.
Do paid masterminds need different rules than free ones?
The rules are the same. The enforcement is different. In a paid group, the facilitator is being paid to enforce, so members expect strictness and get it. Free groups skip enforcement to avoid awkwardness, which is why most die within months. If you run a free group, enforce like you're being paid to.
The rule nobody writes down
Here's the meta-rule behind all 9: the group exists for the members who take it seriously.
Every rule above protects the founder who shows up prepared, shares real numbers, and does what they said they'd do. That's the person you build the group for, not the ghost in the Slack.
I built Profitable Founder Club on exactly these rules: bootstrapped SaaS founders between $5K and $50K MRR, bi-weekly calls, 3 real problems solved per call, batch capped at 20 so enforcement stays personal. If you want a group where the rules are already handled and every member shares real numbers, apply and see if it's a fit.
Either way: write your 9 sentences, say them out loud, and enforce rule 1 the first time it's tested. That single moment decides whether you've built a mastermind or a group chat.
