A few months ago, I sat down with a guy who did almost everything right.
He saved consistently.
He avoided bad debt.
He had a solid 401(k).
Then we got to Social Security.
“I just turned it on at 62,” he told me. “Figured I’d enjoy it while I could.”
No strategy. No coordination. Just… timing.
And that one decision is going to cost him tens of thousands of dollars over his lifetime.
The worst part?
It didn’t feel like a mistake when he made it.
That’s how most of these work.
1. Claiming at 62 Because “That’s What People Do”
I hear this all the time.
Someone retires, looks around at coworkers, and notices most people file as soon as they’re eligible. So they follow the same path. It feels safe. It feels normal.
But what they don’t realize is they’re locking in a permanently reduced benefit. That “little bit less” each month doesn’t seem like a big deal early on… but stretch that out over 20 or 30 years, and it becomes one of the most expensive “default decisions” you can make.
2. Not Knowing Your Full Retirement Age
I had a couple who were convinced 65 was their number.
They built their entire plan around it. Income, timing, everything.
The problem is… their actual full retirement age was later. That small misunderstanding meant they claimed early without realizing it. And once you do that, there’s no going back to fix it cleanly.
3. Not Coordinating as a Couple
I’ve seen couples treat Social Security like two separate decisions.
He files when he wants. She files when she wants. No conversation, no coordination.
But Social Security doesn’t work that way. There are spousal benefits, timing strategies, and survivor considerations that only show up when you plan together. Miss that, and you’re not just losing optimization… you’re leaving real money on the table.
4. Ignoring Survivor Benefits
One widow told me something that stuck:
“I didn’t realize his decision affected me this much.”
Her husband filed early. It made sense at the time. But when he passed, her benefit was based on that reduced amount. And now she’s living with that decision for the rest of her life.
The higher earner’s filing decision is often less about them… and more about the spouse who outlives them.
5. Not Even Considering Waiting
Waiting feels uncomfortable.
You’re giving up income today for more income later. That’s not always easy to justify emotionally.
But I’ve walked through scenarios where waiting just a few years significantly increased lifetime income. Not because of market returns. Not because of risk. Just because of timing.
This is one of the few areas in retirement where patience can directly increase your guaranteed income.
6. Working While Taking Benefits Early (This One Sneaks Up on People)
This one catches people off guard constantly.
I had a client who claimed early but kept working part-time. Nothing crazy. Just staying busy and bringing in some extra income.
Then his Social Security checks started coming in lower than expected.
No one warned him. No one explained it.
He had crossed the income limits, and his benefits were being reduced.
This is one of the most frustrating mistakes because it doesn’t feel like a mistake… it feels like something is broken. But it’s not. It’s just how the system works.
I’ve had people genuinely surprised during tax season.
“Wait… I have to pay taxes on this?”
Social Security can be taxable depending on your overall income. And when you layer in IRA withdrawals, pensions, or even part-time work, you can easily cross those thresholds.
Now what you thought was “steady income” becomes less efficient… and your net income shrinks.
8. Pulling from the Wrong Accounts First
One retiree I worked with started pulling heavily from his IRA.
It seemed logical. That’s what the money was there for.
But what he didn’t realize is that those withdrawals increased his taxable income… which then caused more of his Social Security to become taxable.
It created a domino effect. One decision triggered another, which triggered another.
That’s where tax planning and income planning need to work together.
9. Ignoring Medicare and IRMAA
This is where things really start to connect.
I had a couple do a larger withdrawal in one year to “get ahead.”
Two years later, their Medicare premiums spiked.
They had triggered IRMAA without even knowing what it was.
Social Security decisions don’t exist in a vacuum. They tie directly into taxes… and those taxes can impact your Medicare costs down the road.
10. Treating This Like a Simple Decision
“I’ll just turn it on when I retire.”
That’s the mindset I see most often.
But this one decision touches everything:
Your lifetime income
Your spouse’s future income
Your tax situation
Your Medicare premiums
And most of the time… it’s permanent.
The Bottom Line
The biggest Social Security mistakes aren’t obvious.
They don’t feel reckless.
They don’t feel risky.
They feel normal.
They feel like what everyone else is doing.
And that’s exactly why they’re so dangerous.
If You’re Close to Retirement…
This is one of the few decisions you really don’t get to redo.
If you want a second set of eyes on it…
👉 Schedule a quick intro call with me.
We’ll walk through:
When it actually makes sense for you to file
How it impacts your taxes
What it could do to your Medicare premiums
And how to turn this into a strategy instead of a guess
Talk soon.
-Nate