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What determines your Social Security benefit?
Your Social Security retirement benefit is based mainly on your lifetime earnings covered by Social Security taxes and the age when you begin receiving benefits. The estimate shown in your Social Security record is usually the most useful starting point because it uses your actual reported earnings.
The calculation is more involved than simply averaging your annual income. Social Security generally considers your highest 35 years of wage-indexed earnings. If you have fewer than 35 years of covered earnings, years with no earnings may be included, which can reduce the result.
Your benefit is also affected by:
- Whether you have earned enough work credits to qualify
- Your full retirement age
- Whether you claim before, at, or after full retirement age
- Future earnings if you continue working
- Certain pension, spouse, survivor, or government-work rules
For most people born in 1929 or later, 40 work credits—about 10 years of covered work—are needed for retirement eligibility. In 2026, one credit is earned for each $1,890 in covered earnings, with a maximum of four credits per year. The credit amount changes over time.
Where can you find a personalized estimate?
The most practical approach is to create or review a personal Social Security account. The retirement estimate compares potential monthly benefits at different claiming ages, commonly including age 62, full retirement age, and age 70.
The account also allows you to review the earnings history used in the calculation. This matters because an incorrect year, missing employer report, or unusually low earnings year can affect the estimate.
Review each year carefully, especially if you:
- Changed employers frequently
- Worked for several employers during the same year
- Had self-employment income
- Spent years caring for children or family members
- Worked seasonally or part time
- Had earnings affected by a business closure or extended leave
If the record is incomplete, gather tax forms, wage statements, or other documentation before requesting a correction. An estimate based on inaccurate earnings should not be treated as a final retirement-income figure.
How does the age you claim affect the amount?
You may generally begin retirement benefits at age 62, but claiming before full retirement age permanently reduces the monthly benefit. Full retirement age depends on your birth year and is between 66 and 67 for many current workers.
Claiming at full retirement age generally provides the benefit amount associated with your primary insurance amount. Waiting beyond full retirement age can increase the monthly benefit through delayed retirement credits. For many workers, the increase continues until age 70. There is generally no additional retirement benefit increase for delaying past 70.
A simple comparison might look like this:
- Claiming at 62 may provide income sooner but at a permanently reduced monthly amount.
- Claiming at full retirement age provides a higher monthly payment than claiming at 62.
- Claiming at 70 may provide the largest monthly retirement benefit based on the worker’s own record.
The choice is not only about reaching a larger monthly number. Health, family longevity, current savings, employment plans, and the need for income all affect the decision.
What is the difference between today’s dollars and future dollars?
Social Security calculators may show estimates in either today’s dollars or future, inflated dollars. These figures answer different questions.
An estimate in today’s dollars is easier to compare with current household expenses. For example, it may help a household in Northville think about whether a projected benefit would cover today’s approximate housing, food, transportation, utilities, and property-tax costs.
A future-dollar estimate attempts to show the amount that could appear on a future check after assumed wage growth and inflation. The number may look larger, but future prices may also be higher.
For practical retirement planning, compare benefits and expenses using the same dollar basis. Mixing a future-dollar Social Security estimate with today’s household budget can make the income appear more sufficient than it may be.
How do future earnings change the estimate?
The estimate assumes a future work pattern. If the projection assumes continued earnings and you stop working earlier, the actual benefit may be lower than the estimate. If you continue working and replace one of your lowest 35 earnings years, the benefit may increase.
That does not mean every additional year of work produces a large increase. A new year matters most when it replaces a zero-earnings year or a relatively low year in the 35-year calculation.
Self-employed residents should also remember that Social Security benefits are based on reported covered earnings, not informal income or revenue before business expenses. Accurate tax reporting affects both eligibility and the earnings record.
What if you are married, divorced, or widowed?
The estimate on an individual account may not show the full range of household possibilities. A spouse may qualify for a benefit based on their own record or, in some circumstances, a spousal benefit. A surviving spouse may have different options and timing considerations.
A divorced person may qualify for benefits based on a former spouse’s record if specific requirements are met, including the length of the marriage and the claimant’s marital status. Benefits based on another person’s record do not necessarily reduce that worker’s benefit.
Couples should compare claiming strategies together rather than examining only the higher earner’s estimate. The timing of the higher earner’s benefit can affect the survivor income available later.
What deductions and taxes should be considered?
The benefit estimate is generally a gross monthly amount. The actual deposit may be lower because of federal income-tax withholding, Medicare premiums, or other authorized deductions.
Social Security benefits may be partly taxable depending on combined income. Pension income, withdrawals from retirement accounts, wages, interest, and other income can affect that calculation. The tax treatment should be estimated separately from the Social Security benefit itself.
Medicare enrollment and premiums should also be included in a retirement budget. A household may have more predictable winter utility costs, property taxes, insurance, and home-maintenance expenses than the Social Security estimate reflects, so a monthly benefit should be evaluated against the entire spending pattern.
What happens if you claim while still working?
Working while receiving Social Security can affect payments if you are younger than full retirement age and your earnings exceed the annual limit. In 2026, the lower annual earnings-test limit is $24,480 for people who remain below full retirement age for the entire year. A different, higher limit applies during the year full retirement age is reached, and earnings after the month of reaching full retirement age are not subject to the earnings test.
Benefits withheld under the earnings test are not necessarily lost permanently. Social Security generally adjusts the benefit at full retirement age to account for months when payments were withheld.
Use earnings from wages or self-employment when reviewing this rule. Investment income, pensions, and annuity payments are treated differently for the earnings test.
How should the estimate be used in a retirement plan?
Treat the estimate as one income component rather than a complete retirement plan. A useful review includes at least three claiming scenarios: age 62, full retirement age, and age 70.
For each scenario, compare:
- Estimated monthly benefit
- Years until claiming
- Retirement-account withdrawals
- Health and long-term-care assumptions
- Spousal or survivor income
- Taxes and Medicare premiums
- Housing, insurance, transportation, and seasonal household expenses
The estimate becomes more useful when it is checked periodically. Earnings records, future work plans, legislation, inflation assumptions, and household needs can change. Rechecking the numbers every year or after a major employment or family change helps keep the retirement projection realistic.