Sandbagging has a bad reputation in most offices, but Chapter 13 argues Larry uses the word to mean something closer to discipline than deception. His version of sandbagging is building a cushion before you need one, the same 70/20/10 split from The Richest Man in Babylon that he calls house money. Seventy percent covers living, twenty percent gets saved, and ten percent is set aside to give away or reinvest, so no single deal ever has to save you.

A negotiator with house money in the bank does not flinch at a low offer, because walking away does not cost them their rent. That calm is visible across the table, and Larry’s claim is that buyers can tell the difference between a person who needs the deal and one who wants it. Sandbagging your forecast works the same way: you commit to a number you can clear easily, then the overperformance becomes proof instead of an excuse.
It also protects the SuperModel posture, the dress, the notetaking, the pen-drop close, because none of that composure survives a person who is secretly desperate. Larry is explicit that this is not about lowering ambition, it is about sequencing so the cushion exists before the pressure does.
The One-Way Letter of Intent works on a similar principle, where a client commits to a set of actions and half the value releases at the twenty percent mark. In both cases the money or the credit is held back on purpose, not lost, and the holding is what makes the eventual release trustworthy.
Sandbagging for success, in his reading, just means you built the reserve before anyone asked you to prove you could survive without the deal. The clip attached below is where Larry lays out the 70/20/10 split in his own words.

Details: Watch Larry explain the 70/20/10 split
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