The Empty Nest Window, and What Closes It

1. The catch-up window, and the four years that pay double

The empty nest usually arrives in the last stretch of peak earnings, which is also when the tax-advantaged limits are at their highest. For 2026 (Notice 2025-67, Revenue Procedure 2025-19):

The 60-to-63 band is the part almost nobody plans around. The 401(k) catch-up is $8,000 at 50, rises to $11,250 in the year you turn 60, 61, 62 or 63, and falls back to $8,000 at 64. Four years, and a household with two earners in that band can put away $7,500 more a year than the same household two years later. If you have any control over the timing of bonuses, deferred compensation or a spouse’s return to work, those are the years to aim at.

The HSA catch-up starts at 55, not 50, and it is $1,000 (IRS Publication 969). Each spouse may take their own, but only into their own HSA — a couple cannot double it inside one account, which is the most common way this is lost.

One change to check before you set contributions for the year: under SECURE 2.0, from 2026 catch-up contributions must be made on a Roth basis by employees whose prior-year FICA wages exceeded the statutory threshold. That changes the tax treatment, not the amount, but it changes the arithmetic of whether to defer.

2. What actually happens to spending, and what nobody can tell you

A claim circulates — and an earlier version of this page carried it — that the Bureau of Labor Statistics finds household spending rises 5–15% in the first year after children leave. BLS publishes no such finding, and its survey cannot produce one. The Consumer Expenditure Survey is a rotating panel in which an address is dropped after four consecutive quarters (BLS, CE survey design), so it does not follow the same household across the years before and after a child departs.

What BLS does publish is cross-sectional, and it points the other way. Spending peaks in the 45–54 age band at $60,524 and declines thereafter (BLS). By household composition, “married couple only” averaged $76,046 against $95,779 for households whose oldest child is 18 or over (BLS) — roughly 21% less, not more.

The same gap explains a second figure you will meet: $18,271 a year per child, credited to USDA. It appears in no USDA publication, and USDA discontinued its Expenditures on Children by Families series — the last report, issued in January 2017 on 2015 data, put the total at $233,610 to age 17 for a middle-income married-couple family, nearer $13,000 a year. Two of the most-quoted numbers about this transition are credited to two federal agencies, and neither agency publishes them.

But that comparison does not prove spending falls when your children leave either. It compares different households in one year, not the same household over time; the couples in the first group are on average five years older and may differ in many ways. The honest answer is that no federal survey measures this transition, so the only reliable figure is your own: track the three months after against the three months before, in your own accounts.

That is not a evasion of the point the fabricated statistic was making. Spending does drift upward when a constraint is removed, and the mechanism is real even where the number is not. It is simply that the number was invented and the agency it was credited to cannot produce one.

3. Health cover: your child until 26, and you at 65

A child can stay on a parent’s plan until they turn 26, and the conditions people assume apply do not. It does not matter whether they are married, have children of their own, are in or out of school, live at home or elsewhere, are claimed as a tax dependent, or have been offered coverage by their own employer (HealthCare.gov, CMS). Turning down a job’s health plan to stay on yours is allowed.

The cut-off works differently by plan type, and this is where families get caught (HealthCare.gov):

On a job-based plan, coverage usually ends during or shortly after the month they turn 26. On a Marketplace plan, it runs to 31 December even if the birthday falls in January. Ageing off a job-based plan opens a special enrolment period for them that starts 60 days before the loss and ends 60 days after — a window that closes quietly.

At the other end, your own Medicare. The initial enrolment period runs seven months: the three before the month you turn 65, that month, and the three after (Medicare.gov). Miss it without qualifying coverage and Part B costs an extra 10% for each full 12-month period you could have enrolled, for as long as you have it; Part D adds 1% a month of the national base premium, $38.99 for 2026 (Medicare.gov).

Active employer coverage lets you delay without penalty, with an eight-month special enrolment period afterwards — but it runs from when the employment or the coverage ends, not from when COBRA ends. COBRA and retiree coverage do not count as active coverage, and assuming otherwise is how people acquire a lifetime Part B penalty (SSA). If your employer has fewer than 20 employees, you generally need Part B at 65 regardless.

4. Downsizing, and the exclusion that decides whether it is worth it

The number that governs a downsizing decision is not the price difference between the two houses. It is how much of the gain you can exclude, and for most long-tenured owners it covers the whole thing.

Under section 121 you may exclude $250,000 of gain on a principal residence, $500,000 filing jointly, provided you owned the home for at least 24 of the last 60 months and used it as your residence for at least 24 of the last 60 — and the use need not be a single continuous block (IRS Publication 523). Two details matter for couples: only one spouse must meet the ownership test but both must meet the use test, and the exclusion may be taken only once in any two-year period.

A partial exclusion is available where a sale fails those tests for a qualifying reason: a work-related move at least 50 miles farther away, a health-related move, or an unforeseeable event such as death, divorce, casualty or an inability to meet basic living expenses.

The recurring savings are worth counting separately from the equity released: lower property tax, lower insurance, less maintenance, often lower utilities. Those are the figures to take from your own last twelve months of bills rather than from any published range, because they vary more by property than by region.

And weigh the things that do not appear in the arithmetic at all — proximity to adult children and any grandchildren, whether the new place works on one floor, transaction costs that do not come back, and whether you would be selling into a market you would have to buy back into later.

5. The leftover 529

Money left in a 529 after the last tuition bill has four routes, and one of them is new enough to be missed.

Change the beneficiary to another family member, including a sibling, a future grandchild or yourself. This is the cheapest option and has no tax consequence.

Roll it into the beneficiary’s Roth IRA. SECURE 2.0 allows up to $35,000 over a lifetime per beneficiary, provided the 529 has been open at least 15 years, in a direct trustee-to-trustee transfer. Each year’s rollover is capped at the Roth contribution limit for that year, and contributions made in the previous five years, plus their earnings, cannot be rolled (IRS Topic 313). That last rule is the one that surprises people who front-loaded the account late.

Leave it. There is no deadline, and a 529 can sit for decades against a grandchild who does not exist yet.

Withdraw it. A non-qualified withdrawal is taxed on the earnings portion only, plus a 10% additional tax on that same portion — your contributions come back untouched (IRS Technical Guide 44). The 10% is waived where the beneficiary received a scholarship, attended a US military academy, died or became disabled, or where the expenses were used for an education credit — but in every one of those cases the earnings are still ordinary income (Instructions for Form 5329).

6. Supporting an adult child without funding it from your retirement

The subsidies that continue after a child moves out are individually small and collectively not: a phone line, car insurance, a streaming bundle, groceries, help with rent. They are worth naming out loud and giving an end date, because the alternative is that they continue by default and nobody ever decides to stop.

Co-signing is the one to think hardest about. A co-signer is equally responsible for the debt, the account appears on their credit report, and missed payments damage their score — while, as the CFPB puts it, the co-signer does not necessarily have the same rights to the asset as the borrower (CFPB). Full liability, no ownership. And release is largely theoretical: the CFPB found that 90% of private student loan borrowers who applied for co-signer release were rejected (CFPB). Treat a co-signature as permanent, because in practice it is.

The trade-off to make explicit is that money given now is money not compounding. Whether that matters depends on a rate and a horizon you have to choose — $30,000 at 7% over fifteen years becomes about $82,700, and at 5% about $62,400. Neither figure is a reason not to help a child; both are a reason to decide the amount deliberately rather than by accumulation.

7. When to claim

For anyone born in 1960 or later, full retirement age is 67 (SSA). Claiming at 62 pays 70% of the full amount — a 30% reduction that does not reverse. Delaying past full retirement age earns 8% a year in delayed retirement credits, reaching 124% at 70, after which the increase stops (SSA, SSA).

That spread — 70% against 124% — is the largest single lever in a retirement plan, and the empty-nest years are when it is still possible to build the bridge that makes delaying affordable. The question is not which age is optimal in the abstract but whether you can fund the gap between stopping work and claiming, which is exactly what the freed-up cash flow is for.

8. The mistakes that cost the most

Missing the 60-to-63 catch-up. It is $11,250 rather than $8,000, for four years only, and then it is gone.

Taking the HSA catch-up in one spouse’s account. Each spouse’s $1,000 must go into their own HSA, and it starts at 55.

Dropping a child from the family plan before 26 because they married, moved out or were offered coverage at work. None of those ends eligibility.

Counting COBRA as active coverage for Medicare. The eight-month special enrolment period runs from when employment ends, and the Part B penalty lasts for life.

Selling the family home twice inside two years. The section 121 exclusion is available once in any two-year period.

Rolling recent 529 contributions to a Roth. Anything contributed in the last five years, and its earnings, is not eligible.

Co-signing on the assumption you can be released later. Nine applications in ten are rejected.

Deciding the new spending level by default. No agency measures what happens to household spending when children leave; your own statements for the three months either side are the only figure that applies to you.

9. Go deeper: the decision behind each section

Each decision above has a page of its own. Start with the empty-nest decision engine to sequence contributions, housing and claiming against your own dates. The retirement guide covers the claiming decision in full, the 529 guide covers the leftover-balance routes in detail, the home guide covers the buy side of a downsizing move, and the contribution limits guide carries every 2026 figure. The decision tools run the numbers for your own case.

10. Common questions

How much can I put in a 401(k) at 61? $35,750 for 2026 — the $24,500 deferral plus the $11,250 catch-up available at ages 60 to 63. At 64 it drops back to $32,500.

Can my daughter stay on our health plan now she has a job? Yes, until she turns 26, even if her employer offers her coverage and she turns it down.

When does her coverage actually end? On a job-based plan, during or shortly after the month she turns 26. On a Marketplace plan, 31 December of that year.

Do we pay tax on the gain if we downsize? Usually not. A married couple filing jointly excludes the first $500,000 of gain, provided the ownership and use tests are met and the exclusion has not been used in the previous two years.

What happens to the money left in the 529? Change the beneficiary, roll up to $35,000 over a lifetime into the beneficiary’s Roth IRA if the account is 15 years old, leave it, or withdraw it and pay tax plus 10% on the earnings only.

Does household spending go up or down when children leave? Nobody measures it. BLS runs a rotating four-quarter panel that cannot follow a household through the transition, and its cross-sectional data shows couples without children at home spending less — but that compares different households, not the same ones.

Is claiming Social Security at 62 a mistake? It pays 70% of the full amount against 124% at 70, permanently. Whether the reduction is worth it depends on whether you can fund the gap, not on which number is larger.

Sources

Every figure links to the body that publishes it, with the year it applies to. Where no federal source measures something — what happens to household spending when children leave — this page says so and points you at your own statements instead of supplying a number. One element of the 529-to-Roth rules, whether the beneficiary needs earned income, could not be confirmed on an IRS page and is therefore not asserted here.

• Contributions: IRS Notice 2025-67 · IRS, 2026 limits · Revenue Procedure 2025-19 · Publication 969
• Housing and 529: Publication 523 · Topic 313 · Technical Guide 44 · Instructions for Form 5329
• Health cover: HealthCare.gov, children under 26 · turning 26 · CMS · Medicare enrolment · Medicare penalties · SSA on Medicare timing
• Claiming and credit: SSA full retirement age · SSA on delaying · SSA delayed retirement credits · CFPB on co-signing · CFPB on co-signer release
• Spending: BLS Consumer Expenditure Survey design · BLS, spending by age · BLS, spending by household composition