No. Life insurance is only one kind of property that you may own, and a will is necessary to dispose of other assets that you own at death. If a life insurance policy is payable to an individual, your will has no effect on the proceeds. If the policy is payable to your estate, the disposition of the proceeds may be directed by the will. Life insurance can be useful in providing cash at death for payment of taxes and expenses, but like most strategies for insurance, the careful person will consult a lawyer, a life insurance counselor, and a financial adviser. Mistakes in ownership and beneficiary designations in these policies can cause great increases in estate taxes owed.