The cost basis in a life insurance policy is the total premiums you’ve paid into the contract, reduced by any amounts you’ve already taken out tax-free. The Internal Revenue Code calls this your “investment in the contract,” and it’s the dividing line between money you can pull out without tax and money the IRS treats as ordinary income.1Office of the Law Revision Counsel. 26 USC 72 – Annuities; Certain Proceeds of Endowment and Life Insurance Contracts Get the number wrong and you misreport income, usually years later, when a surrender, lapse, or exchange forces the question.
How the Number Is Built
Start with every premium dollar you’ve paid. Subtract any amount the policy has already returned to you tax-free. What’s left is your basis. The cash value growth inside the contract, whether from credited interest, insurer dividends, or market performance in a variable product, is not part of your basis. That growth is the policy’s gain, and it stays untaxed only until you take it out.
A quick illustration. You’ve paid $50,000 in premiums over the years and previously received $5,000 in cash dividends that were excluded from income. Your basis is $45,000, not $50,000. Every tax-free dollar that leaves the policy chips away at what remains.
How Dividends, Loans, and Riders Change the Basis
Dividends are the most common adjustment, and their treatment depends on what you do with them. Taking a dividend in cash, or using it to reduce a premium bill, is a tax-free return of premium and reduces your basis dollar for dollar.2General Accounting Office (GAO). Tax Treatment of Life Insurance and Annuity Accrued Interest Directing that same dividend to buy paid-up additions is different: the dividend isn’t treated as a distribution, and the cost of the additional coverage is added to your basis going forward.
Policy loans do not move your basis while the policy stays in force. A loan is debt, not a withdrawal. Your investment in the contract holds steady no matter how much you borrow. That’s true right up until the policy lapses or is surrendered with the loan still outstanding, at which point the outstanding balance gets treated as a constructive distribution. More on that below.
Riders vary. A waiver-of-premium rider adds nothing to basis because you’re not putting cash in when it activates. The portion of your premium allocated to a term insurance rider or a qualified long-term care rider is generally included in the investment in the contract.
How Basis Determines Tax on Withdrawals and Surrenders
For a standard life insurance policy (not a Modified Endowment Contract), the IRS applies a basis-first rule to partial withdrawals. Your own premiums come out first, tax-free. Only after you’ve recovered every dollar of basis does the next withdrawal become taxable as ordinary income.2General Accounting Office (GAO). Tax Treatment of Life Insurance and Annuity Accrued Interest
Take a whole life policy with $100,000 in total premiums paid and a current cash value of $140,000. The $40,000 difference is the gain. Withdraw $20,000 and the entire amount is tax-free, because it sits inside your $100,000 basis. Your basis drops to $80,000 and the cash value to $120,000. Later withdraw $90,000, and the first $80,000 is tax-free (exhausting basis) while the final $10,000 is taxable.
A full surrender is the same math in one transaction. Surrendering that policy for $140,000 with a $100,000 basis produces $40,000 of taxable gain. The insurer reports the taxable portion to the IRS on Form 1099-R, so it isn’t something you can quietly leave off a return.3IRS. 2025 Instructions for Forms 1099-R and 5498
Modified Endowment Contracts Flip the Order
A Modified Endowment Contract, or MEC, is a life insurance policy that was funded too heavily relative to its death benefit. If total premiums during the first seven contract years exceed the limit set by the “7-pay test,” the contract is classified as a MEC.4Office of the Law Revision Counsel. 26 USC 7702A – Modified Endowment Contract Defined Certain material changes to a contract can restart the testing period and pull the policy into MEC status.
MEC treatment changes the tax picture in two ways. First, the withdrawal order flips from basis-first to gain-first. Every dollar you take out is taxable income until the accumulated gain is fully withdrawn, and only then do further distributions come out as a tax-free return of basis. This applies to loans against a MEC as well, not just outright withdrawals. Second, taxable amounts received from a MEC before age 59½ carry an additional 10% penalty on top of the ordinary income tax.5Office of the Law Revision Counsel. 26 USC 72 – Annuities; Certain Proceeds of Endowment and Life Insurance Contracts – Section (v)
MEC status is permanent. Once a policy crosses the line, there’s no returning to standard tax treatment.
Basis in a 1035 Exchange
Section 1035 lets you swap one life insurance policy for another life insurance policy, an endowment, an annuity, or a qualified long-term care contract without triggering current tax on the gain.6Office of the Law Revision Counsel. 26 USC 1035 – Certain Exchanges of Insurance Policies Your basis carries directly over to the replacement. If the old policy had a $75,000 basis, the new one starts at $75,000.7Office of the Law Revision Counsel. 26 USC 1031 – Exchange of Real Property Held for Productive Use or Investment – Section (d)
In a partial 1035 exchange, basis is allocated proportionally between the old and new contracts based on the share of cash value moved.8IRS. Revenue Procedure 2011-38 – Section 1035 Move 40% of the cash value, and 40% of the basis goes with it.
The most common pitfall is an outstanding policy loan. If the new insurer does not carry the loan over, the discharged loan balance is treated as money received by you (boot) and is taxable to the extent of gain in the original contract.7Office of the Law Revision Counsel. 26 USC 1031 – Exchange of Real Property Held for Productive Use or Investment – Section (d) Repaying the loan before the exchange, or lining up an insurer that will assume it, avoids the tax. The exchange also has to be a direct company-to-company transfer. If the proceeds pass through your hands, the IRS can recast the whole thing as a taxable surrender followed by a new purchase.
The Lapse-With-a-Loan Trap
This is the scenario that blindsides policyholders. A policy that lapses or is surrendered while a loan is still outstanding creates a taxable event even though no cash changes hands. The insurer applies the remaining cash value against the loan, and the IRS treats that as if you received the full cash value and then repaid the loan yourself. The taxable amount is the total cash value at lapse (including the portion used to pay off the loan) minus your remaining basis.1Office of the Law Revision Counsel. 26 USC 72 – Annuities; Certain Proceeds of Endowment and Life Insurance Contracts
Say a policy has $200,000 in cash value, a $150,000 outstanding loan, and a $60,000 basis. At lapse, the deemed distribution is the full $200,000, and the taxable gain is $140,000. You owe income tax on $140,000 despite receiving nothing. The insurer reports the distribution on Form 1099-R.9Internal Revenue Service. About Form 1099-R, Distributions From Pensions, Annuities, Retirement or Profit-Sharing Plans, IRAs, Insurance Contracts, etc. If a heavily loaned policy is close to lapsing, options like a 1035 exchange or additional premium payments to keep it in force can prevent the phantom income.
A Boundary Worth Knowing: Transfer for Value
Cost basis usually matters to the policyholder. Selling or transferring a policy for consideration pulls the beneficiary in as well. Under IRC Section 101, life insurance death benefits are normally excluded from the beneficiary’s income. When a policy is transferred for value, the exclusion is capped at the price the buyer paid plus premiums the buyer paid afterward. Anything above that is taxable at the insured’s death. Limited exceptions preserve the full exclusion, including transfers to the insured, the insured’s partner, a partnership in which the insured is a partner, or a corporation in which the insured is a shareholder or officer, and transfers where the buyer’s basis is determined by reference to the seller’s basis.10Office of the Law Revision Counsel. 26 USC 101 – Certain Death Benefits Outside those, selling a policy can convert a tax-free death benefit into a largely taxable one.
Proving Your Basis Is Your Job
The burden of proving cost basis is on the taxpayer, not the insurer and not the IRS.11Internal Revenue Service. Publication 551, Basis of Assets That means tracking every premium payment, every dividend taken in cash, every partial withdrawal, and every loan transaction over the life of the contract, which can run for decades.
Insurers send annual statements showing premiums received and cash value, but they aren’t required to track cumulative basis or report it to the IRS. On an older policy, one that has moved through a 1035 exchange, or one whose original agent is long gone, reconstructing basis from scratch can be hard. Keep the original application, every annual statement, any correspondence about dividends or withdrawals, and the paperwork from any prior 1035 exchange. When a policy has been exchanged, the documentation from the original contract is the only proof that the carryover basis is what you say it is.
Without records, the IRS can treat the entire distribution as taxable gain. That outcome is avoidable, but only for the policyholder who kept the paperwork.