The short answer
The costliest Social Security mistakes usually come from treating one monthly benefit as the whole decision. A sound filing plan compares claiming ages, work earnings, taxes, spouse and survivor benefits, longevity, and the savings needed while waiting.
- Do not claim at 62 or delay to 70 automatically; compare household outcomes.
- Use the correct 2026 earnings-test limits: $24,480 and $65,160.
- Review both spouse records and survivor protection before either person files.
Good to know: A lower lifetime benefit is not proof that a decision was wrong; health, liquidity, work, and personal priorities also matter.
Social Security is often the only retirement income designed to last for life and receive annual cost-of-living adjustments. A filing choice can therefore affect decades of income and, for couples, the benefit that remains after one spouse dies.
Yet there is no universal best claiming age. Filing early can be rational for someone with limited savings or poor health. Delaying can be valuable for longevity protection. The mistake is making either choice automatically, without testing the household consequences.
Mistake 1: Claiming at 62 only because it is available
Age 62 is the earliest common starting age for retirement benefits, but it usually produces a permanent reduction. For someone with full retirement age 67, claiming exactly at 62 generally produces about 70% of the full-retirement-age benefit.
A simple example
What a $2,000 full benefit looks like
Assume full retirement age is 67 and the benefit at 67 is $2,000 per month.
| Claiming age | Monthly benefit | Received by 70 |
|---|---|---|
| 62 | $1,400 | $134,400 |
| 67 | $2,000 | $72,000 |
| 70 | $2,480 | $0 |
Illustration only. This simplified break-even math ignores COLAs, taxes, investment returns, the earnings test, benefit rounding, and spousal or survivor effects.
The early checks matter. In the simplified example above, the age-62 claimant has already received $134,400 by age 70, while the age-70 claimant has received nothing. The later benefit must catch up over time.
That is why break-even math is useful—but incomplete. It does not capture taxes, investment returns on money used while delaying, the earnings test, survivor benefits, or personal health.
Before claiming at 62, ask:
- Can current expenses be covered from work, cash, or planned portfolio withdrawals?
- Will early claiming trigger the earnings test?
- Does the higher earner’s decision protect a future surviving spouse?
- How would the plan perform if either spouse lives into the 90s?
Mistake 2: Delaying to 70 as if it is always optimal
Delayed retirement credits can increase a worker benefit after full retirement age until 70. For a person with FRA 67, the age-70 benefit is commonly about 124% of the PIA before later COLAs.
But delaying requires a bridge. The household must fund the years without that Social Security income. If the bridge forces high-interest debt, an unsustainably large portfolio withdrawal, or a loss of needed health coverage, the larger future check may not compensate for the current strain.
Delay is generally more attractive when longevity is strong, savings can cover the gap, and the higher benefit improves survivor protection. It may be less attractive when health is poor, liquidity is thin, or the person qualifies for a different benefit that changes the sequence.
Mistake 3: Ignoring the retirement earnings test
People who claim before full retirement age and continue working can have benefits temporarily withheld when earnings exceed the annual limit.
For 2026:
- if you are under FRA for the full year, the limit is $24,480, with $1 of benefits withheld for every $2 above the limit;
- in the year you reach FRA, the limit is $65,160, with $1 withheld for every $3 above it, counting only earnings before the FRA month;
- beginning with the month you reach FRA, there is no retirement earnings-test limit.
Engine-backed 2026 example
The same benefit and earnings can produce three different results
Assume a Social Security benefit of $24,000 per year. The result depends on whether the worker is below, reaching, or already at full retirement age.
Under FRA all year
$40,000 of earnings
- 2026 limit used
- $24,480
- Benefits subject to withholding
- $7,760
- Benefit remaining for the year
- $16,240
$1 withheld per $2 over the limit
Reach FRA this year
$72,000 of earnings
- 2026 limit used
- $65,160
- Benefits subject to withholding
- $2,280
- Benefit remaining for the year
- $21,720
$1 withheld per $3 over the limit
At or after FRA
$72,000 of earnings
- 2026 limit used
- No limit
- Benefits subject to withholding
- $0
- Benefit remaining for the year
- $24,000
No withholding
| Situation | Work earnings used | Limit | Withheld | Benefit remaining |
|---|---|---|---|---|
| Under FRA all year | $40,000 | $24,480 | $7,760 | $16,240 |
| Reach FRA this year | $72,000 | $65,160 | $2,280 | $21,720 |
| At or after FRA | $72,000 | None | $0 | $24,000 |
Illustration only. The FRA-year scenario assumes all $72,000was earned before the FRA month. Actual payment timing, whole-check withholding, special monthly rules, family benefits, and later SSA adjustments can change cash flow.
Withholding is not the same as a tax and is not necessarily a permanent loss. At FRA, SSA recalculates the benefit to credit months affected by withholding. But the immediate cash-flow effect can be substantial because SSA may withhold whole monthly checks.
Mistake 4: Planning one spouse at a time
For couples, two individually reasonable choices can create a weak household plan. The higher earner’s claiming age can affect the benefit available to the survivor. A lower earner may have an own benefit, a spouse top-up, or later a survivor benefit.
The maximum living-spouse benefit is generally based on 50% of the worker’s PIA at the spouse’s FRA—not half of the worker’s age-70 check. A survivor benefit follows different rules and can reflect delayed retirement credits earned by the deceased worker.
Model at least three paths:
| Household path | Typical purpose | Main risk to test |
|---|---|---|
| Both claim early | Income starts sooner | Lower lifelong and survivor income |
| Lower earner early, higher earner delays | Balances current cash flow and survivor protection | Bridge withdrawals and work rules |
| Both delay when eligible | Maximizes later monthly income | Liquidity and early-death outcome |
Also screen for divorced-spouse and survivor rights after a marriage lasting at least 10 years.
Mistake 5: Confusing “85% taxable” with an 85% tax rate
Depending on combined income and filing status, up to 85% of Social Security benefits can be included in federal taxable income. That does not mean the government takes 85% of the check.
Combined income generally includes adjusted gross income, tax-exempt interest, and half of Social Security benefits. Traditional IRA withdrawals, wages, interest, and capital gains can push more benefits into taxable income.
Engine-backed federal example
See the threshold, the taxable amount, and the next-dollar effect
Bob and Linda file jointly. They receive $40,000of Social Security, withdraw $25,000 from a traditional 401(k), and receive $2,000 of tax-exempt interest.
Joint combined income
$0–$32,000Benefits generally not taxableJoint combined income
$32,000–$44,000Up to 50% may be taxableJoint combined income
Above $44,000Up to 85% may be taxableThis is the amount included in taxable income—not the tax bill and not 85% of the check.
of additional taxable income in this example: the withdrawal plus$850 more taxable benefits.
For this illustrative age-67 couple at $120,000 MAGI; eligibility and phaseout rules apply.
Illustration only. The taxable-benefit calculation comes from the Clear Nest Egg deterministic engine using the statutory federal formula. The additional senior deduction can reduce taxable income or final tax, but it does not change the combined-income thresholds or the calculated taxable portion of Social Security.
The planning opportunity is coordination, not a guaranteed tax trick. A Roth conversion before benefits begin, qualified Roth withdrawals, capital-gain timing, or spreading traditional-account withdrawals across years may help in some scenarios and hurt in others. State taxation also varies.
Mistake 6: Trusting an old estimate without checking the earnings record
Social Security uses the highest 35 years of indexed earnings. Fewer than 35 years creates zero years in the average. New high earnings can replace old low earnings, while an incorrect or missing year can reduce the estimate.
Before choosing a claiming month:
- open an official my Social Security account;
- compare the earnings history with W-2 forms or tax records;
- review estimates at several claiming ages;
- update the future-work assumption; and
- correct errors promptly using SSA’s process.
Our Social Security Estimator can explain how 35 years and future earnings interact, but the official SSA record remains the source for the actual benefit.
Mistake 7: Assuming the decision cannot be changed
Social Security filing decisions are important, but there are limited correction tools.
Withdrawal of an application
SSA may allow a retirement application to be withdrawn within 12 months of the first month of entitlement. The person generally must repay benefits received, including amounts paid to family members and certain amounts withheld for Medicare premiums or taxes. Withdrawal is not a free trial and is generally limited.
Voluntary suspension
After reaching full retirement age and before 70, a person can ask SSA to suspend retirement benefits and earn delayed credits for future months. Suspension can also stop benefits paid to other people on that record, with limited exceptions, and Medicare premiums may need to be paid directly.
These tools are safeguards, not reasons to file casually. Before using either one, ask SSA for the exact consequences for family benefits, Medicare, repayment, and the future monthly amount.
A better filing process
Use a decision process that connects the benefit to the rest of retirement:
- verify both earnings records;
- list eligible retirement, spouse, divorced-spouse, and survivor benefits;
- compare several claiming dates by month;
- include work earnings and the 2026 earnings test;
- estimate federal and state taxes;
- measure portfolio withdrawals needed while delaying;
- stress-test both spouses living longer than expected; and
- document the assumptions so the plan can be updated.
Bottom line
The largest Social Security mistake is optimizing a single check while ignoring the household plan. A good decision is not simply “claim early” or “wait until 70.” It is the claiming path that keeps current cash flow workable, protects the survivor, and remains resilient across different lifespans.
Start with the Social Security Break-Even Calculator, then test the result alongside taxes, work, savings, and spouse benefits before filing.
Primary sources
- SSA: Retirement benefits and claiming age
- SSA: 2026 COLA fact sheet and earnings-test limits
- SSA: Manage, withdraw, or pause retirement benefits
- SSA: Voluntary suspension of retirement benefits
- SSA: Family benefits
- IRS Publication 915: Social Security benefits
This article is educational and uses general assumptions. Tax, healthcare, and retirement-plan rules can change. Confirm important decisions with official sources and qualified professionals.