Guides
IUL vs 401(k): why the comparison misleads
IUL and a 401(k) do different jobs. Compare 2026 contribution limits, taxes, costs, access and risk before shifting money from one to the other.
An IUL and a 401(k) are not like-for-like. A 401(k) is an investment account with tax benefits; an IUL is a life insurance policy with a cash account attached, and every dollar of its growth is net of the cost of insurance. For most people with a workplace plan, especially one with an employer match, the 401(k) comes first, and IUL is considered only for a specific insurance need or after tax-advantaged accounts are used.
The 2026 limits
According to the IRS (Notice 2025-67, issued November 2025), the limits for 2026 are:
| Item | 2026 limit |
|---|---|
| 401(k) employee deferral | $24,500 |
| Catch-up, age 50 and over | $8,000 |
| Catch-up, ages 60 to 63 | $11,250 |
| IRA contribution | $7,500 |
An IUL has no annual contribution limit set by the IRS. Instead, section 7702 limits how much premium a policy can hold relative to its death benefit, and the seven-pay test determines whether it becomes a modified endowment contracts and the 7-pay test. That is why promoters pitch IUL as the place for money beyond the 401(k) limit. The question is whether the money would be better in a taxable brokerage account after the plan limits are used.
Side by side
| 401(k) | IUL | |
|---|---|---|
| Purpose | Retirement savings | Life insurance with a cash account |
| Contributions | Pre-tax (traditional) or after-tax (Roth option); employer match possible | After-tax premiums; no employer match |
| Annual limit | $24,500 in 2026 plus catch-up | No IRS annual cap; limited by 7702 and MEC rules |
| Growth | Market return less fund and plan fees | Index credit after cap/participation/spread, less monthly insurance and admin charges |
| Downside | Market losses can reduce balance | 0% floor on credits; charges continue |
| Withdrawals | Traditional is taxed as income; 10% additional tax before age 59 1/2 for most withdrawals, with exceptions | Loans generally not taxed if the policy stays in force; withdrawals tax-free up to basis |
| Required distributions | RMDs begin at 73 or 75 depending on birth year (traditional) | None |
| Death benefit | Account balance to beneficiary | Income-tax-free death benefit, usually larger than the account |
| Guarantees | None on returns | Floor on credits; most other terms non-guaranteed |
On RMDs, the IRS says the starting age is 73 for people born 1951 through 1959 and 75 for those born in 1960 or later, per its RMD FAQs. Roth 401(k) balances no longer have lifetime RMDs.
Why the comparison misleads
Different cost structures. A 401(k) holding low-cost index funds typically charges a small fraction of a percent a year. An IUL pays for insurance, commissions are embedded in charges and surrender periods can last 10 to 15 years. See fees and charges inside permanent life insurance.
The "no losses" framing. A policy illustrated against the S&P 500's worst year looks better with a 0% floor. But caps limit the up years, and charges reduce the account even in flat years. Over a full cycle the comparison depends on the cap, participation rate and costs in the contract, not on the floor alone. See IUL caps, participation rates and floors.
Taxes: now vs later. The usual argument is that a 401(k) is "taxed later at an unknown rate," while IUL is "tax-free." In practice, a traditional 401(k) gives a deduction now at your current rate, and many retirees are in a lower bracket. IUL premiums get no deduction. A Roth 401(k) offers tax-free withdrawals with a much lower cost structure.
Employer match. A match is an immediate return on contributions that no IUL offers. Suppose, hypothetically, that your employer matches 50% of the first 6% of a $100,000 salary: $3,000 a year on $6,000 of your contributions. Skipping that to fund an IUL gives up a guaranteed 50% return on that slice.
Illustrations. IUL projections assume a steady credited rate and non-guaranteed charges, even under NAIC Actuarial Guideline 49. See IUL illustrations and Actuarial Guideline 49.
Access is not free. Loans from an IUL reduce the death benefit, accrue interest and can trigger a taxable event if the policy lapses with the loan outstanding. See life insurance policy loans: how they work and what they risk and how cash value is taxed: withdrawals, loans and surrenders.
When an IUL can still make sense
- You have a lifelong insurance need and would otherwise buy permanent coverage anyway.
- You have captured the match, funded the 401(k) and IRA, and still have money to save.
- You value the lack of RMDs and a death benefit as part of an estate plan.
- You will commit to funding the policy for 15 or more years.
It makes less sense if you are young, have not yet received the full employer match, carry high-interest debt, or only need coverage for a defined period, in which case level term plus investing is conventional. See buy term and invest the difference: does it hold up.
A decision order
- Build an emergency fund and pay off high-interest debt.
- Contribute enough to the 401(k) to capture the full employer match.
- Consider an HSA if eligible, and Roth or traditional IRA contributions up to the $7,500 limit for 2026 (IUL vs Roth IRA for tax-free retirement income).
- Increase 401(k) contributions toward $24,500.
- Compare taxable investing and, if there is a lifelong insurance need, permanent policies, using guaranteed and lower-rate illustrations.
A fee-only planner or tax professional can test this order against your tax bracket and goals.
Key takeaways
- A 401(k) is an investment account; an IUL is insurance whose cash value is net of insurance costs. They are not substitutes.
- 2026 limits: $24,500 for 401(k) deferrals, $7,500 for IRAs, with catch-ups at 50 and over (IRS Notice 2025-67).
- An employer match usually beats any IUL feature, so capture it first.
- IUL may fit after tax-advantaged accounts are used, if a lifelong insurance need exists and you can fund it for the long term.