Step-Up in Basis and Life Insurance in Estate Planning

The step-up in basis is a federal tax provision that adjusts the cost basis of inherited assets to their fair market value at the date of death. While life insurance death benefits themselves are already income-tax-free, the step-up in basis interacts with life insurance planning in several important ways that affect overall estate strategy. Understanding these interactions helps ensure that life insurance is used most effectively within a comprehensive estate plan.

First, understanding what does and does not receive a step-up is important. Assets like real estate, stocks, and business interests receive a step-up in basis at death, eliminating capital gains tax on appreciation during the decedent's lifetime. Life insurance death benefits do not need a step-up because they are already received income-tax-free under IRC Section 101(a). However, the cash surrender value of a life insurance policy transferred by inheritance does receive a step-up to its fair market value at the date of death — a rarely relevant but technically important distinction.

The interaction between step-up and life insurance is most significant in estate equalization and business succession planning. When a family estate contains highly appreciated assets (a business worth $5 million with a $500,000 basis, for example), the step-up at death eliminates the $4.5 million of built-in capital gains tax for heirs who inherit the asset. Life insurance can then be used to equalize the estate for heirs who do not receive the appreciated asset, without any tax disadvantage. These figures are illustrative; actual values vary.

Life insurance also plays a role in managing estates where the step-up may be insufficient to solve the overall tax picture. For estates above the federal estate tax exemption, the estate tax (up to 40%) may more than offset the step-up benefit. An ILIT-owned life insurance policy can provide the liquidity needed to pay estate taxes without forcing the sale of appreciated assets that received the step-up — preserving the stepped-up assets intact for the heirs.

In cross-purchase buy-sell agreements funded by life insurance, the surviving partner uses the death benefit to purchase the deceased partner's business interest. The purchase price becomes the surviving partner's new basis in the acquired interest, which is functionally similar to a step-up and is more tax-efficient than an entity-purchase arrangement where the company redeems the deceased partner's share (which does not provide a basis increase to the surviving partners).

The step-up also affects the decision of whether to sell or hold appreciated assets during the estate owner's lifetime. If an estate contains assets with substantial unrealized gains, the step-up at death eliminates those gains for heirs. Life insurance can replace the economic value of assets that might otherwise need to be sold during the owner's lifetime to fund living expenses or charitable giving, preserving those assets for the step-up benefit.

For estates with both appreciated assets and life insurance, the interplay between the step-up (which benefits from including assets in the taxable estate) and ILIT ownership (which benefits from excluding the death benefit from the estate) requires careful balancing. The estate planner must weigh the estate tax cost of inclusion against the capital gains tax savings from the step-up — a calculation that depends on the specific assets, their appreciation, the estate size, and the applicable tax rates.

Coordinating step-up planning with life insurance maximizes overall estate tax efficiency and ensures that the estate plan works as a unified strategy rather than as separate, potentially conflicting elements.