A 401(k) is a tax-deferred retirement account, often with an employer match. An IUL is permanent life insurance with tax-advantaged cash value. They aren't direct substitutes — they cover different risks.
Taxes
401(k) contributions are pre-tax, but every dollar you withdraw in retirement is taxed as ordinary income. An IUL is funded with after-tax dollars; its cash value grows tax-deferred and can be accessed income-tax-free through policy loans under current tax law.
Market risk
A 401(k) is fully exposed to market swings — a downturn near retirement can be costly. An IUL's 0% floor protects cash value from market losses, trading some upside (via the cap) for downside protection. See protecting retirement from a market crash.
Using both together
Many savers contribute to a 401(k) at least up to the employer match, then add an IUL for tax diversification, principal protection, and a death benefit. The right mix depends on your situation — the framework is The SHIELD Protocol.
Should I stop my 401(k) to fund an IUL? +
Usually not — especially if you receive an employer match, which is an immediate return. An IUL typically complements a 401(k) rather than replacing it.
Which has better growth? +
A 401(k) has uncapped market upside (and full downside); an IUL caps upside in exchange for a 0% floor. Different risk profiles for different goals.
Is an IUL really tax-free? +
Cash value grows tax-deferred, and properly structured policy loans are generally not taxed under current law. Tax treatment depends on your circumstances — consult a tax professional.