Splitting Retirement Accounts
Retirement accounts are usually the largest marital asset, and you cannot divide them by writing a check. The mechanics differ by account type, and getting them wrong converts a tax-free division into a taxable disaster.
Employer plans governed by ERISA — 401(k), 403(b), and traditional pensions — are protected by an anti-alienation rule that admits exactly one exception for divorce ( ERISA §206(d)(3), 29 U.S.C. §1056(d)(3)): a Qualified Domestic Relations Order (QDRO), a separate court order drafted to the plan administrator’s specifications and approved by both the judge and the plan. Without it, “giving half my 401(k)” to an ex-spouse is a taxable distribution to you, plus the 10% penalty if you are under 59½. With it, the plan splits cleanly and the receiving ex-spouse — the alternate payee — owns their share directly.
The QDRO carries a feature worth knowing. A distribution paid to an alternate payee under a QDRO is exempt from the 10% early-withdrawal penalty ( IRC §72(t)(2)(C), “Tax on early distributions from qualified retirement plans”). It is the one moment an under-59½ spouse can pull cash out of a 401(k) penalty-free. The money is still ordinary income if it is not rolled over — but if liquidity is needed, take it at the QDRO stage, before the share is rolled into an IRA, because once it lands in the IRA that penalty exemption is gone (section “Early Withdrawal Penalty Minimization”).
IRAs work differently: no QDRO applies. An IRA is divided as a transfer incident to divorce under IRC §1041, “Transfers of property between spouses or incident to divorce”, with IRC §408(d)(6), “Transfer of account incident to divorce” supplying the specific rule that the transferred portion is thereafter treated as the recipient’s own IRA. Done correctly — the split spelled out in the decree or separation instrument and moved trustee-to-trustee — it is a non-taxable event. Done as an ordinary withdrawal handed across the table, it is fully taxable to the original owner, who has now paid tax and a penalty on money they no longer have. The decree language is what makes it tax-free, so make it explicit. Note the asymmetry with a QDRO: because §408(d)(6) is not a QDRO, the IRC §72(t)(2)(C) penalty exemption does not apply to an IRA split, so an under-59½ recipient who needs cash gets no free pass. Government and military plans (the federal Thrift Savings Plan, FERS, and military pensions) use their own order formats instead of the private-sector QDRO.
Three execution details decide whether the QDRO works at all. Get the draft pre-approved by the plan administrator before the judge signs it, because plans reject orders routinely and a rejected order sends you back to a court that has moved on. Address the survivor annuity explicitly: in a defined-benefit pension the order should state whether the alternate payee is treated as the surviving spouse for the qualified joint and survivor annuity and the qualified pre-retirement survivor annuity, and an order silent on the point can leave the ex-spouse with nothing if the participant dies first. And file it immediately — a QDRO entered years after the divorce, or after the participant has died, remarried, retired, or emptied the account, is a malpractice case looking for a defendant.
Finally, mind the tax character of what you split. Half a Roth IRA is worth more than half a traditional IRA of the same balance — one is after-tax money, the other carries a deferred tax bill. Price it explicitly: a traditional balance that will be withdrawn at a marginal rate is worth , so $1,000,000 of pre-tax 401(k) facing a 32% blended rate is worth about $680,000 against $1,000,000 of Roth or $1,000,000 of cash. Divide account types proportionally, or discount the pre-tax accounts before you agree to the split. A QDRO can reach the Roth subaccount of a 401(k) as well as the pre-tax side; the alternate payee inherits the participant’s five-year clock instead of starting a fresh one, which makes the Roth portion worth still more.
Two accounts do not divide this way, and assuming they do is expensive. Nonqualified deferred compensation is not a qualified plan, so no QDRO applies and ERISA’s anti-alienation rule does not protect it — it moves, if the plan permits movement at all, under the rules in section “Equity Compensation and Business Interests”, and many plans simply forbid assignment, leaving the employee spouse holding the obligation. And an HSA divides under IRC §223(f)(7), “Health savings accounts” as a tax-free transfer incident to divorce, but only if the decree says so; withdraw and hand over cash instead and it is a taxable distribution plus a 20% penalty.
Rebuilding After the Split Handing an ex-spouse half of a retirement account resets a savings plan by a decade, and the recovery tools are age-gated, so know them before you need them. Catch-up contributions begin at 50; under SECURE 2.0 a higher “super” catch-up applies in the years you are aged 60 through 63, and from 2026 catch-up contributions by employees whose prior-year wages from that employer exceeded the indexed $150,000 threshold must be made as Roth — which is a tax increase in the year you can least afford it and an advantage later (section “Roth 401(k)”). If the divorce lands in a low-income year, that year is the cheapest Roth conversion window you will ever get (section “Roth IRA”); a spouse who leaves the workforce during the proceedings frequently has one year at a marginal rate they will never see again.