When companies compare private office options in Ho Chi Minh City, the conversation almost always starts with the monthly rate per desk. It is the most visible number, the easiest to put in a spreadsheet, and the least useful measure of what the space will actually cost. The more important number — the one most providers don't put in their headline — is what happens to your budget when circumstances change and you need to leave before the contract ends. That number is where "affordable" offices stop being affordable. And it is where most of the market has gotten the model wrong.