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How much is the insurance premium?
Literal
Insurance-fee [topic-は] how much is (polite)?
いくら is the standard 'how much' for prices; 幾ら in kanji is fairly rare and feels slightly formal. 保険料 is 'insurance fee/premium,' using the suffix 料 ('fee, charge') — a productive suffix: 授業料 (tuition), 使用料 (usage fee), 手数料 (handling charge).