When you actually need permanent insurance, from someone who earns nothing on it
Permanent life insurance solves exactly one problem well: turning an illiquid estate into cash, at death, with certainty. The rest of what gets said about it ranges from plausible to commission-driven, and the difficulty is telling which is which when nearly everyone writing on the subject earns a living selling it.
This piece describes when the product is the right answer, written by someone who earns nothing when you buy it. The situations where it matters are narrow. They are also expensive to get wrong.
The question permanent insurance actually answers
An estate has a tax bill. The assets that would pay it are a business, real property, farmland, timber, a limited partnership interest, restricted stock on a vesting schedule, or some other holding that cannot be sold at the moment the return is due. The heirs can take possession of what was left to them, or they can sell enough of it to pay the government. They cannot do both.
Permanent life insurance — whole life, universal life, the variants that carry cash value rather than expiring at a term — puts cash in the estate at the same moment the tax bill arrives. The death benefit is sized to the projected liability, so the heirs write a check to the IRS from the policy proceeds and keep what the estate was built around.
That is the use. Everything else the brochure says a permanent policy does — tax-free growth, living benefits, creditor protection, forced savings — either works better in a different structure or matters far less than the cost of delivering it. The product is expensive, inflexible and illiquid. It belongs in a plan only where the alternative is worse.
When the estate is illiquid because of what it holds
An estate is illiquid when the things in it cannot be turned into cash quickly without losing value. Real estate in a depressed market. A dental practice in a town with two buyers. A veterinary hospital where the goodwill walks out the door the day the owner does. Farmland, timberland, a portfolio company inside a fund with a three-year lockup. Restricted equity in a company approaching an exit but not there yet.
The Tax Cuts and Jobs Act doubled the federal estate tax exemption to $11.18 million in 2018, indexed annually for inflation. Under Section 2010 of the Internal Revenue Code, the 2025 exemption sits at $13.99 million per person, $27.98 million for a married couple. On our reading of the statute, those figures are scheduled to revert to roughly half their current level on 1 January 2026 unless Congress extends them. An estate above the exemption pays federal tax at 40 percent on the amount over the line.
For an estate built around illiquid assets, the arithmetic opens a seam. A business worth $20 million and financial accounts worth $2 million means the estate is $22 million, $8 million over a 2026 exemption if the sunset occurs. The tax bill is $3.2 million. The liquid assets cover $2 million of it, which leaves $1.2 million to find. The business can be sold to raise it, but a forced sale to meet a nine-month deadline is not the same transaction as a planned one. The buyer knows the estate is under pressure, and the price moves accordingly.
A permanent policy with a $1.5 million death benefit solves it. The premium is paid over the owner's working years. The benefit arrives on death, outside the timing constraints that govern everything else. The estate writes the check, the heirs keep the business, and what would have been a distressed sale does not happen.
Private market allocations and the liquidity problem they create
A portfolio with meaningful exposure to private equity, venture capital, real assets or direct co-investments is illiquid by design. The capital is locked for years, distributions arrive on the general partner's schedule rather than the investor's, and the positions cannot be marked or sold the way a public equity holding can. The returns may justify the structure, but the structure creates an estate planning problem that a liquid portfolio does not have.
Take a household with a $30 million estate in 2026, assuming the exemption has dropped to $14 million. The federal tax bill on the $16 million overage is $6.4 million, due nine months after death. If $18 million of the $30 million sits in private funds with capital calls pending and distributions years out, the estate has $12 million it can actually touch. The tax bill is half of that. Paying it means liquidating public positions that were meant to remain invested, or selling partnership interests on a secondary market at a steep discount to net asset value, or borrowing against illiquid holdings at terms that assume distress.
Or it means a permanent policy sized to the projected shortfall, funded while the allocations are being built rather than after the problem has already landed. The death benefit does not depend on what the private positions are worth at the moment of death, or on whether a buyer can be found for them, or on how long the estate can wait. It simply delivers the dollars needed to satisfy the tax bill without forcing the liquidation of anything.
Why not just keep more in cash?
Because cash inside an estate is part of the taxable base, and a death benefit outside it — when structured correctly — is not. A household that keeps $6 million in Treasury bills to cover a future estate tax bill has a $6 million asset. If that household is already over the exemption, the Treasury position itself gets taxed at 40 percent, which means they need to hold $10 million in cash to net the $6 million the estate will actually need after the tax on the cash itself is paid. That is $10 million not working anywhere else.
A policy held in an irrevocable life insurance trust may keep the death benefit outside the taxable estate, subject to the terms of the trust and how incidents of ownership are handled. Under Section 2042 of the Internal Revenue Code, life insurance proceeds are generally included in the gross estate if the insured possessed incidents of ownership at death or if the proceeds are payable to the estate. An irrevocable trust that holds the policy and is properly drafted and administered appears to avoid this inclusion. The trust owns the policy, pays the premium from gifts that use the annual exclusion, and receives the benefit on death. The estate gets the liquidity without the benefit being counted as part of what is taxed. The same $6 million outcome costs premiums rather than holding $10 million idle.
Whether that trade makes sense depends on the internal rate of return implied by the premium relative to holding the cash, on how long the insured is likely to live, and on the opportunity cost of the capital in both cases. It is not always the right answer. It is often enough the right answer that an illiquid estate without it is worth a second look.
The installment option, and why it does not replace insurance
Section 6166 of the Internal Revenue Code may allow an estate to defer payment of the portion of the estate tax attributable to a closely held business, paying it in installments over as long as fourteen years. On our reading of the regulation, the estate must meet several conditions: the closely held business must make up more than 35 percent of the adjusted gross estate, the business must qualify under the statute's definition, and the estate must elect the deferral on a timely filed return.
Interest accrues on the deferred tax. Section 6601(j) of the Internal Revenue Code provides for a 2 percent interest rate on a portion of the deferred amount, with the indexed threshold adjusted for inflation. For amounts beyond that threshold, the interest rate is the rate applicable to underpayments, which has been substantially higher. The estate also remains liable for the full amount, and a default on the installment plan accelerates the entire remaining balance.
Section 6166 is a backstop, not a strategy. It keeps an estate from having to sell the business in month six to meet a month nine deadline, but it does not eliminate the tax or make the cash appear. The family still needs to find the money, they simply have more time to find it. If the business cannot generate the cash to service the installment payments while also funding operations and supporting the next generation, the deferral becomes a slow-motion forced sale rather than an immediate one. A death benefit sized to the liability closes the question on day one.
How much coverage, and when to consider it
The benefit should correspond to the projected tax bill, not to the total estate value. The calculation runs at the current exemption and at the post-sunset figure. If the estate is $25 million today and the exemption is $14 million in 2026, the overage is $11 million and the federal tax is $4.4 million. Add state estate tax if the estate includes property or business interests in a state that imposes one. Subtract the liquid assets that will be available to pay the bill without forcing a sale of something that should not be sold. What is left is the shortfall.
For an estate weighted toward private market allocations, the harder question is estimating what those positions will be worth at death and what portion of that value will be accessible within nine months. A fund with a ten-year term that is in year eight may distribute before the tax is due. A fund in year three will not. An estate attorney working with the investment assumptions can model it, but the answer will carry a range rather than a number.
A policy that is larger than the tax bill leaves the estate with cash it did not need for the IRS. A benefit that falls short forces a partial liquidation anyway. Neither is ideal, but the first is the softer problem.
The question of when to purchase the policy turns on underwriting. A business owner at fifty with a $15 million estate and ten years until a likely sale faces different underwriting than a business owner at sixty-five with the same estate and a cardiac history. Health and age determine whether coverage is available, and at what cost. The exemption's scheduled sunset creates a planning horizon, but that horizon does not override the underwriting calendar.
What this is not for
Permanent insurance is not an investment. The internal return on a policy, accounting for premiums paid and death benefit received, depends entirely on when the insured dies. Die early and it is the highest-returning asset the estate ever bought. Live to ninety-five and the premiums compounded in an index fund would have done better. The product does not belong in a comparison with equities or fixed income. It belongs in a comparison with the cost of not having the cash when the estate needs it.
It is not a tax shelter. The cash value grows without current taxation, which is useful, but accessing that cash value during life triggers tax and potentially reduces the death benefit. The advantage is deferral, not elimination, and the deferral comes with restrictions that make the policy a poor substitute for a brokerage account or a Roth conversion ladder.
It is not a retirement funding vehicle unless everything else has been exhausted first. A physician who has not maximized a 401(k), a backdoor Roth contribution, and a taxable account does not need to be funding a whole life policy. The insurance lobby has spent decades positioning permanent coverage as tax-advantaged savings, which it is, but only after accounting for the embedded costs and the liquidity constraints. For most households those costs exceed the tax benefit.
The question permanent insurance answers is narrow: can this estate pay its tax bill without selling what it was built around? Where the answer is no, the policy is worth the cost. Everywhere else, it is not.
Bottom line
Permanent life insurance funds an estate tax liability with an asset that arrives exactly when it is needed and in a form the estate can use immediately. It matters for estates built around businesses, real property, timber, farmland, or private market allocations — anything that cannot be sold at fair value in the nine months the IRS allows. It does not matter for estates that are mostly liquid, that fall comfortably below the exemption, or that can pay the tax out of financial accounts without forcing a sale of operating assets.
The coverage should correspond to the projected shortfall after accounting for what the estate can pay from liquid holdings. It should be considered while the insured can still qualify for it, which generally means earlier rather than later. And it should be held in a structure — typically an irrevocable life insurance trust — that appears to keep the benefit outside the taxable estate.
Whether a particular estate needs this, and how much, turns on the titling of the assets, the health and age of the insured, the timing of expected liquidity events, and the interplay between federal and state estate tax regimes. These are worth walking through with an estate attorney and a CPA who have the actual documents and the actual balance sheet in front of them. This describes how the law is written, not advice about any particular situation. An estate attorney or a CPA should review the actual documents and circumstances. Written to the law as it stood in January 2025.