Islip Town tax bills will increase $73 for the average household next year after board members failed to adopt a spending plan in time, ensuring it passed by default.

The $289 million budget , which exceeds the state tax cap, represents a $10.5 million increase over the 2025 plan . It requires Islip to raise the tax levy roughly $8.8 million, marking the second year in a row Islip has exceeded the limit. The last time the town pierced the cap was in the 2017 budget.

Islip’s town board voted 4-1 against scheduling a budget hearing on Sept. 16. On Nov. 6, a vote to approve the budget failed , with two members voting for it and three opposed.

Officials did not consider adopting a budget at the Nov. 18 town board meeting. They instead allowed the state’s Nov. 20 budget deadline to pas

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