Complex sentence: In an insurance policy, the deductible (also known as excess in some countries, especially the United Kingdom) is the amount of expenses that must be paid out of pocket before an insurer will cover any expenses.
Split into simpler sentences: In an insurance policy, the deductible (also known as excess in some countries, especially the United Kingdom) is the portion of any claim that is not covered by the insurance provider. It is the amount of expenses that must be paid out of pocket before an insurer will cover any expenses.