You pay 6.2% of every paycheck into Social Security over the course of your career, with the expectation that the system will return a fair portion of that money in retirement benefits.
But people with shorter work histories may not qualify for Social Security at all, or they may receive a far smaller monthly check than they expected, because the benefit formula penalizes anyone who worked fewer than 35 years.
The reduction is not obvious on your annual Social Security statement, yet it compounds quietly over the full length of a typical retirement.
For married workers, the Social Security system provides an alternative route through spousal benefits that could deliver more monthly income than their own record would generate, and most couples never explore this option before they file.
Social Security requires at least 10 years of work history
Workers must earn a minimum of 40 work credits to become eligible for any Social Security retirement benefit. In 2026, one credit equals $1,890 in covered earnings, with a maximum of 4 credits available per year,according to the Social Security Administration.
That credit threshold is low enough that even many part-time workers can accumulate the 40 credits needed to qualify for benefits over a decade of employment.
Social Security is the major source of income for most people age 65 and over…Nine of ten people in this age group receive a monthly benefits check, and recent data show that close to half of them rely solely on this money. That is, they don’t have pensions or savings to supplement it
Workers who fall short of 40 credits cannot claim a retirement benefit on their own work record, but married individuals who lack enough credits may still qualify for a spousal benefit on their partner’s record. That distinction makes marriage a potential financial lifeline for workers who spent significant portions of their careers outside the paid labor force.
Zero-income years in the 35-year formula can cost you
The Social Security Administration examines your entire earnings history, adjusts each year for wage growth, and selects the 35 highest-earning years to calculate your Average Indexed Monthly Earnings.
If you worked fewer than 35 years, the agency plugs a zero into every missing year, and those zeros drag your average down before the benefit formula is applied.
Even a single zero-income year folded into that 420-month average can reduce your benefit enough to cost you thousands of dollars over the course of a 20-year or longer retirement, the report noted.
Workers who took time away from the labor force to raise children, manage a health condition, or transition between careers are especially vulnerable to this provision.
Working longer replaces zero-income years
Reaching at least 35 years of covered employment before filing for benefits eliminates the zero-income year penalty entirely, and continuing to work beyond that threshold carries no downside for your Social Security calculation.
Workers who earn more today than they did earlier in their careers will see their higher recent income gradually replace their lowest-earning years in the 35-year average, the SSA explains on its retirement planner.
Kailey Hagen, a certified financial planner and retirement analyst, noted that this annual recalculation means every additional year of employment has the potential to boost your monthly check, particularly if your current salary exceeds the inflation-adjusted value of your earlier wages, USA Today reported.
Marriage can help improve your benefits
Married workers who accumulated a short earnings history and qualify for only a small retirement benefit on their own record may find that a spousal benefit delivers a larger monthly payment.
The Social Security Administration allows eligible spouses to receive up to 50% of their partner’s full retirement age benefit, and the agency automatically pays whichever amount is higher, USA Today reported.
There is a key restriction that couples need to understand: you cannot collect a spousal benefit and your own retirement benefit at the same time, and you cannot file for the spousal benefit until your partner has already claimed their own retirement benefits, the report noted.
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That filing requirement means the timing of each spouse’s claim directly affects the other spouse’s available options and potential monthly income.
Divorced workers may also qualify for a spousal benefit on their former partner’s record, provided the marriage lasted at least 10 years and the applicant has not remarried, the SSA notes.
That provision extends the same financial lifeline to people whose shorter work history resulted from caregiving or other unpaid labor during a long-term marriage that later ended. Because the benefit is drawn from the ex-spouse’s earnings record without reducing that person’s own monthly check, neither party loses income when a former partner files a claim.
How married couples can coordinate Social Security claims
Hagen outlined a strategy in which the lower-earning spouse files for their own retirement benefit first, allowing the higher earner to delay their claim and accumulate delayed retirement credits that increase their monthly payment by roughly 8% for each year they wait past full retirement age.
Once the higher-earning spouse files, the lower-earning spouse can switch to the spousal benefit if that amount exceeds their own check, the report recommended.
Jennifer Teague, director for health coverage and benefits at the National Council on Aging, noted that many eligible spouses remain unaware they have access to spousal benefits, making it critical for couples to review both records together before either partner files a claim.
How the SSA earnings record fits into the 35-year calculation
The 35-year rule is one of the least visible mechanics in the Social Security system, but its impact on monthly income is significant, particularly for workers who spent portions of their careers outside the paid labor force.
Every zero-income year folded into the benefit formula lowers the average that determines the monthly check, and the resulting reduction carries forward across every month of retirement.
Spousal and ex-spousal benefits offer an alternative path for eligible workers, but those options come with their own filing requirements and timing constraints that affect both partners.
The Social Security Administration’s free My Social Security account at SSA.gov allows workers to view their complete earnings history, confirm that each year of income has been recorded, and generate benefit estimates under different claiming scenarios.
The SSA notes that earnings discrepancies are easier to resolve closer to the year the income was earned, since older records can require additional documentation that may no longer be readily available.
For workers approaching retirement with a short earnings history, financial planners cited by USA Today say the 35-year formula and the spousal benefit calculation are the two mechanics that most often determine whether a household’s monthly income lands closer to the minimum or the maximum benefit available under their record.
Related: Social Security Cuts: How likely are they to happen?
