A supply line fails in Unit 12 on a Sunday. Water reaches four units and the corridor. The adjuster totals the loss at $94,000, the master policy responds, and the association receives a check for $69,000. The missing $25,000 is the deductible. Somebody has to pay it, and in most associations nobody has decided who before the day it happens. That question is now larger than it used to be. Secondary market standards allow a master policy per-unit deductible of up to $50,000, and in a hardening market plenty of boards accepted a higher deductible in exchange for a lower premium - often without working through the consequence. A higher deductible is not a saving. It is a transfer of risk from the premium to whoever ends up paying the deductible. So who does pay? The answer is in your governing documents, and there are three patterns. Some documents say the deductible is a common expense. All owners pay it through the budget or a special assessment, regardless of where the water started. Clean to administer, and it means a careless owner's failed washing machine hose is funded by their neighbors. Some documents authorize the association to charge the deductible, or the uninsured portion of a loss, back to the unit where the loss originated - sometimes limited to cases of negligence, sometimes not. These provisions vary enormously in wording and in how far they reach. And many older Massachusetts documents are simply silent. Silence is not neutral. In practice it generally means the association absorbs it as a common expense, because the board has no documented authority to charge it to anyone else. A board that assesses an owner anyway, without that authority, is inviting a challenge it will probably lose. So the first job is not a policy decision. It is reading your master deed and bylaws, with counsel, and finding out which of the three you have. Do it now rather than during a claim. Then do four things. Confirm the actual deductible on your current policy, per occurrence and per unit, and write it where the board will see it - in the budget, next to the insurance line. Trustees who approved a deductible increase two renewals ago frequently cannot state the number today.