A. As a general rule, all dividends paid or credited before the maturity or surrender of a contract are tax-exempt as return of investment until an amount equal to the policyholder’s basis has been recovered. More specifically, when aggregate dividends plus all other amounts that have been received tax-free under the contract exceed aggregate gross premiums, the excess is taxable income.
It is immaterial whether dividends are taken in cash, applied against current premiums, used to purchase paid-up additions, or left with the insurance company to accumulate interest.
Thus, accumulated dividends are not taxable either currently or when withdrawn (but the interest on accumulated dividends is taxable) until aggregate dividends plus all other amounts that have been received tax-free under the contract exceed aggregate gross premiums. At that point, the excess is taxable income.