Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. MoMo Productions / Getty Images The coinsurance formula is the homeowners insurance formula ...

Coinsurance for small businesses helps cover property and business assets, so the insurer knows there's adequate coverage.

Coinsurance is the portion of a medical bill you pay after meeting your deductible. It’s a cost-sharing arrangement between you and your insurance company — they cover a percentage of the expense and ...

Medicare has different out-of-pocket costs, including premiums, deductibles, copayments, and coinsurance. Copayments are fixed dollar amounts, and coinsurance is a percentage of the cost. You may ...