Claim Social Security Early and Let the 401(k) Grow? Most Couples Have It Backwards

Here is the instinct almost every couple walks in with: turn on Social Security as soon as you can, leave the 401(k) alone, let it compound. It feels responsible. Free government money now, more market money later.

A 64-year-old couple ran the numbers both ways this month, and the case study is making the rounds because the answer came out the opposite of the instinct. Spend the retirement account first, delay Social Security, and you can end up with a materially bigger guaranteed check for the rest of your life — and your spouse's life.

Read this part first: are you still working?

Before any of the math matters, there is one rule that decides whether claiming early is even a real option. If you claim before your full retirement age and you are still earning a paycheck, Social Security takes some of the check back.

• Under full retirement age for the whole year: Social Security withholds $1 for every $2 you earn above $24,480 in 2026.
• In the year you reach full retirement age: $1 for every $3 above $65,160, counting only the months before your birthday month.
• From the month you hit full retirement age on: no limit. Earn whatever you want.

That is the whole point. Claiming early only makes sense if you have actually stopped working — or if your work income is small. If you are still pulling a real salary at 62 or 64 and you file anyway, you are taking a permanently reduced benefit and handing part of it straight back. It does not make sense on any math.

Two fine-print notes people miss. First, only wages and self-employment income count. Pensions, annuity payments, IRA and 401(k) withdrawals, interest, dividends and capital gains are not counted toward the limit. Second, the withheld money is not gone forever — at full retirement age your benefit is recalculated upward to account for the months that were withheld. It is a delay, not a bonfire. But it is still a bad trade compared with simply waiting.

Why the 401(k)-first order wins

If you are genuinely retired, the sequence question opens up. Delaying Social Security past full retirement age adds roughly 8% per year of delayed retirement credits until 70. Stack that against filing at 62 and the difference between the smallest and largest possible check runs as high as 76% for the same work history.

Nothing in your portfolio pays you 8% more, guaranteed, inflation-adjusted, for as long as you live. Spending the 401(k) in those bridge years is how you buy that.

Three things that come with it

• A low-tax window. In the years before Social Security starts and before required minimum distributions kick in, your taxable income can be unusually low. That is the cheapest stretch of your life to do Roth conversions or realize gains on purpose.
• Smaller RMDs later. Every dollar you spend or convert out of the pre-tax account in your 60s is a dollar not forced out at a higher bracket in your 70s, and not pushing you into an IRMAA surcharge on Medicare.
• A bigger survivor check. When one spouse dies, the household keeps the larger of the two benefits. Delaying the higher earner's claim is, functionally, life insurance for whoever lives longest.

How to build the bridge

You do not fund a five-year bridge out of stocks and hope. The couple in the case study laddered short-term Treasuries maturing in the years they needed the cash, with yields in the neighborhood of 4% to 4.4%. That is the boring, correct answer: money you need in 24 months does not belong in the market.

The practical version is a ladder — a rung maturing each year you plan to spend before Social Security starts — with the long-term portfolio left alone to do its job.

When claiming early is the right call

This is not a rule, it is a default. Filing early can be exactly right when:

• You have a health condition or family history that makes a long life unlikely.
• You have no meaningful portfolio to bridge with, so the choice is Social Security or a credit card.
• You are the lower-earning spouse and the household is delaying the bigger benefit anyway.
• You are genuinely done working and the cash lets you stop selling investments in a down market.

Common questions

Does working after I claim reduce my benefit forever?

No. Benefits withheld under the earnings test are restored through a higher monthly amount once you reach full retirement age. What is permanent is the reduction for claiming before full retirement age in the first place — that one does not get undone.

Do 401(k) withdrawals count against the earnings limit?

No. The earnings test counts wages and net self-employment income only. Retirement account withdrawals, pensions, annuity income, interest and dividends do not count. They can still make more of your Social Security taxable, which is a separate issue.

How much bigger is the check if I wait until 70?

Roughly 8% per year of delay past full retirement age, and the gap between claiming at the earliest age and the latest can reach about 76% of the monthly amount. The increase is permanent and it gets cost-of-living adjustments on top.

What if the market drops during my bridge years?

That is the argument for funding the bridge with Treasuries or CDs maturing on schedule rather than selling stock. The bridge is a known bill with a known date, so it gets a known-value asset.

This is general information, not personal advice. Your full retirement age, work income, health, tax bracket and marital situation all change the answer — run your own numbers with a licensed advisor on our team before you file anything.