Marriage and Money: Accounts, Spousal IRAs, Beneficiaries, Benefits

Marriage changes the rules on several money decisions, not only the habits. Whether to merge accounts is a choice; the rest is law. Married couples filing jointly can fund an IRA for a spouse with little or no income. A 401(k) generally must go to a surviving spouse unless that spouse signs away the right. And a spouse can receive Social Security based on the other's work record. Knowing which rules apply to your household matters more than picking the "right" account structure.

Joint, separate or both

No account structure is correct for every couple. The decision turns on three questions: how different your incomes and spending habits are, how much each person values independent money, and whether either of you brings debt or obligations from before the marriage.

Structure	Works well when	Common failure
Fully joint	Similar money habits, shared goals, one household budget	One partner stops tracking because the other does it all
Fully separate	Strong preference for autonomy, prior debts or children from earlier relationships	Shared costs get split by argument instead of by rule
Joint for shared costs, separate for personal	Different incomes or habits, both want some autonomy	Contributions to the joint account never get revisited as incomes change

The middle option is common for a reason. Decide in advance how much each person puts into the shared account (equal amounts, or proportional to income), and review it once a year. What matters most is that both partners can see the whole picture, including retirement balances and debts. The same failure shows up in every structure: one person stops knowing where the money is.

The spousal IRA lets a lower earner keep saving

IRA contributions are normally capped at your own taxable compensation. If you file a joint return and earn less than your spouse, the IRS rule for spousal IRAs lets you contribute based on the couple's combined compensation instead.¹ For 2026 the IRA limit is $7,500 per person, plus a $1,100 catch-up at 50 or older.²

Example: one spouse earns $90,000 and the other stays home with young children. Filing jointly, the couple can put up to $7,500 into each spouse's IRA for 2026, $15,000 in total, because combined compensation exceeds both contributions. The account belongs to the spouse whose name is on it, which keeps retirement savings in both names during years when only one person earns.

Beneficiary forms override the will

Retirement accounts and many brokerage accounts pass to whoever is named on the beneficiary form. FINRA puts it plainly: a transfer-on-death or other beneficiary document supersedes your will.⁴

For 401(k)s and similar plans, federal rules add a spousal protection: when a married participant dies, the plan generally must pay the remaining vested balance to the surviving spouse unless the spouse has consented to another beneficiary.³ IRAs do not carry the same default, so the form on file decides.

The decision rule: check every beneficiary form after a wedding, a divorce, a birth or a death. A form naming a former partner or a parent can quietly send an account somewhere neither of you intends.

Social Security spousal benefits

A spouse can receive up to half of the benefit amount the other spouse would get at full retirement age.⁵ Spousal benefits can start at 62 but are reduced if claimed before your own full retirement age, which falls between 66 and 67.⁵ If you also qualify on your own record, SSA pays the higher amount, not both added together.⁵

This changes how couples should think about claiming. The higher earner's claiming age affects the household for longer than a single person's would, especially if the higher earner dies first. The same SSA page notes that a spouse 65 or older may also qualify for Medicare based on the other spouse's work history.⁵

Related sections

For budgeting methods couples can share, see personal finance. If one of you plans to stop working before 65, read early retirement, where a spouse's health plan often fills the gap until Medicare. For account types and fees, see on investing. Couples raising children will find custodial accounts and 529 plans under kids and money.