What Is a Binary MLM Plan?

The binary is the most widely deployed plan family in direct selling, and the one whose liability is most often mismodelled. Both facts have the same cause: the weaker-leg mechanism makes each period’s payout look bounded, and the carry-forward it produces makes the true obligation invisible if you only look at one period.

The structure

Each position has exactly two frontline slots — conventionally called left and right. That is the whole structure. Everything else follows from it.

Because the frontline holds two, a distributor who sponsors a third person must place them further down one leg. That is spillover: a position placed beneath someone other than their sponsor. It is a real benefit when your upline is actively building above you, and it is the most oversold feature in the industry when presented as a reason not to sell.

The formula

For a period:

weaker leg = min(left volume + left carry, right volume + right carry)
commission = min(weaker leg × payout %, cycle cap)
carry forward = |(left + left carry) − (right + right carry)|

Two things fall out of this that matter for budgeting.

Carry-forward is not waste. The excess in the stronger leg is retained. It pays later, when the weaker leg catches up. A model that computes cost from this period’s weaker leg alone is understating the obligation by the size of the accumulated carry balance across the entire field.

The cap is the only hard ceiling. Without a cycle cap, a binary’s cost per position is unbounded in a period where a large carry balance is matched.

A worked three-period cycle

One position, 10% on the weaker leg, no cap. Volume in each leg per period:

Read period 3 carefully. Nothing unusual happened in the field — the right leg simply had a good month. But the accumulated 6,500 of left-leg carry became payable, and the commission on this single position tripled.

Now multiply that across a field of ten thousand positions after a recruitment campaign loads one side of everyone’s tree. That is the period where a binary plan’s payout ratio moves sharply, and it is why carry-forward belongs on the liability side of your model rather than in a footnote.

What the software has to get right

Carry-forward has to be tracked per leg, per position, with history. Not a running total — a record of what accumulated when, so a distributor asking “why did I get paid that” gets an answer rather than an argument.

The cap has to be evaluated after carry is applied, not before, or the ceiling does not actually bind.

A closed period has to be reproducible. If you change the payout percentage next quarter and someone disputes a cycle from last March, re-running has to return what you actually paid — which means the rule set is versioned with the run. This is the property that decides whether a dispute takes two minutes or two weeks.

Placement has to be auditable. Spillover means positions end up under people who did not sponsor them, and “who placed this position and when” is a question that gets asked.

The implementation of each of these is on the binary plan software page.

Before you commit percentages

Model it. A binary looks cheaper than a unilevel per period and is not necessarily cheaper in aggregate, because the unilevel’s cost is visible immediately while the binary’s is deferred into the carry balance.

The plan calculator will show you company-wide commission cost for a binary at a given depth, volume and percentage. Run it before the plan document goes to the field, not after.