Claiming Rules
Understanding Quarters of Coverage in Social Security
Verified against SSA POMS as of September 23, 2026
The short answer
A Quarter of Coverage **(QC)** is a credit used to determine eligibility for benefits. After **1977**, a QC is granted for increments of earnings credited to the year. For years **prior to 1978**, a QC is based on having at least **$50** in wages per quarter, or **$100** in self-employment income.
What is a Quarter of Coverage?
A Quarter of Coverage (QC) is a measure used by the Social Security Administration to determine whether an individual has acquired insured status for benefits. For years after 1977, a QC is credited based on earnings increments specified by the Secretary of the Treasury. The increment amounts have varied over time, and the exact amounts are published annually in the Federal Register. Refer to RS 00301.200 for more details and RS 00301.250 for a chart of required earnings.
RS 00301.200 View source ›RS 00301.250How Quarters of Coverage are Credited
For calendar years after 1978, a QC is credited for each increment of earnings during a year. Prior to 1978, a QC was credited for at least $50 in wages per quarter, or $100 of self-employment income for taxable years beginning after 1950. Refer to RS 00301.301 for details on pre-1978 QCs.
RS 00301.301 View source ›Flexible Assignment of Quarters
The flexible crediting provision allows for the assignment of foreign Quarters of Coverage (QCs) to any quarter within the calendar year. This flexibility is particularly useful when it is necessary to meet insured status for retirement or disability benefits. Overlapping periods are reconciled to ensure no more than four quarters are credited in one year, maximizing all eligible work periods for coverage.
RS 00301.230Insured Status Requirements
Insured status is required to qualify for various benefits, and is established by having the necessary number of QCs. Different benefits have different insured status tests, such as fully insured, currently insured, or disability insured status. Refer to RS 00301.101 for more details on insured status.
RS 00301.101 View source ›Frequently asked
How do quarters of coverage affect my Social Security benefits?
Quarters of coverage affect your eligibility for benefits such as retirement and disability. You need a certain number of QCs to qualify for these benefits.
How many quarters do I need to be fully insured for retirement benefits?
You generally need **40 quarters** of coverage to be fully insured for retirement benefits.
What determines a quarter of coverage after 1978?
After 1978, a quarter of coverage is determined by specified increments of earnings credited in a calendar year.
Can I receive more than four quarters of coverage in a year?
No, you can receive a maximum of **four quarters** of coverage per calendar year.