Glossary of Senior Benefit Terms

AIME — Average Indexed Monthly Earnings

The average of your highest 35 years of earnings, adjusted (indexed) for wage growth over time, that the Social Security Administration uses as the starting point to calculate your Primary Insurance Amount (PIA) and ultimately your benefit. Years with no earnings count as zero, which is why fewer than 35 years of work history can reduce your benefit.

COLA — Cost-of-Living Adjustment

An annual increase applied to Social Security and SSI benefits, based on inflation data (the Consumer Price Index), meant to keep benefits from losing purchasing power over time. Not every year has an increase, though most recent years have. See the COLA Impact Calculator.

CSRA — Community Spouse Resource Allowance

When one spouse needs Medicaid-covered nursing home care and the other continues living independently (the "community spouse"), the CSRA lets the community spouse keep a portion of the couple's combined assets without counting them against the applicant's Medicaid eligibility. It's a spousal impoverishment protection, not a penalty. See the Community Spouse Allowance Calculator.

Dual-Eligible

Someone enrolled in both Medicare and Medicaid at the same time. Medicaid can help cover costs Medicare leaves behind — premiums, deductibles, coinsurance, and long-term care that Medicare doesn't cover. See the Dual-Eligible Checker.

Estate Recovery (MERP)

The federal requirement that states seek repayment, after a Medicaid recipient's death, for long-term care costs Medicaid paid on their behalf. It only applies after death, only to the deceased's own estate, and is automatically blocked while a spouse or certain dependent children are alive. See the Estate Recovery Risk Checker.

Extra Help (LIS — Low-Income Subsidy)

A federal program that reduces Medicare Part D prescription drug costs — premiums, deductibles, and copays — for beneficiaries with limited income and resources. Distinct from a Medicare Savings Program, though many people qualify for both. See the Extra Help Eligibility Calculator.

FRA — Full Retirement Age

The age (66 to 67, depending on birth year) at which you're entitled to 100% of your calculated Social Security retirement benefit. Claiming before FRA permanently reduces the benefit; waiting past FRA, up to 70, permanently increases it. See the Full Retirement Age Calculator.

HECM — Home Equity Conversion Mortgage

The formal name for the most common type of reverse mortgage — an FHA-insured loan that lets homeowners 62+ convert home equity into cash without monthly payments, repaid when the home is sold or the owner moves out or passes away. See the Reverse Mortgage (HECM) Estimator.

IEP — Initial Enrollment Period

The seven-month window around your 65th birthday (three months before, your birthday month, and three months after) when you first sign up for Medicare. Missing it can trigger a late enrollment penalty unless you qualify for a Special Enrollment Period. See the Medicare Enrollment Period Finder.

IRMAA — Income-Related Monthly Adjustment Amount

A surcharge added to standard Medicare Part B and Part D premiums for beneficiaries whose income (from two years prior) exceeds certain thresholds. It applies as a cliff, not a gradual increase. See the IRMAA Calculator.

Look-Back Period

The window (generally five years) during which Medicaid reviews an applicant's financial records for asset transfers made below fair value before applying for long-term care coverage. Transfers found during that window can trigger a penalty period of ineligibility. See the Look-Back Period Calculator.

MAGI — Modified Adjusted Gross Income

Your Adjusted Gross Income (AGI) plus certain items added back, such as tax-exempt interest. MAGI is the income figure used to determine IRMAA surcharges, ACA marketplace subsidy eligibility, and whether Social Security benefits are taxable — different programs sometimes define it slightly differently, so the exact add-backs can vary by context. For ACA subsidies specifically, MAGI adds back 100% of Social Security benefits, not just the taxable portion. See the ACA Subsidy Calculator and IRMAA Calculator.

MAPR — Maximum Annual Pension Rate

The income ceiling the VA uses to determine both eligibility for VA Pension and the amount paid — your VA pension is generally the difference between your countable income and the MAPR limit for your situation (with or without dependents, with or without Aid and Attendance). See the VA Pension Eligibility Calculator.

MMMNA — Minimum Monthly Maintenance Needs Allowance

The minimum monthly income Medicaid guarantees a community spouse can keep when their spouse is receiving Medicaid-covered nursing home care, even if it means the applicant spouse's income has to be redirected to reach that minimum. Works alongside the CSRA as a spousal impoverishment protection. See the Community Spouse Allowance Calculator.

PACE — Program of All-Inclusive Care for the Elderly

A Medicare and Medicaid program that provides comprehensive medical and social services to help nursing-home-eligible seniors continue living in their community instead. Availability is limited to areas with a PACE organization. See the PACE Program Eligibility Checker.

PIA — Primary Insurance Amount

The Social Security benefit amount you'd receive at exactly your Full Retirement Age, calculated from your AIME using a formula with fixed "bend points." Your PIA is the baseline that gets reduced (claiming early) or increased (claiming late, or through COLA) to produce your actual monthly benefit. See the Benefit Estimator.

QMB — Qualified Medicare Beneficiary

The most generous of the three Medicare Savings Programs — QMB pays Medicare Part A and B premiums and generally eliminates deductibles, coinsurance, and copays entirely for those who qualify. The other two tiers (SLMB and QI) help with premiums only, at higher income levels. See the Medicare Savings Program Eligibility Calculator.

SEP — Special Enrollment Period

A window outside the standard Medicare enrollment periods that lets you sign up without a late enrollment penalty, most commonly triggered by losing employer coverage after age 65. See the Medicare Enrollment Period Finder.

SPAP — State Pharmaceutical Assistance Program

A state-run program that helps residents pay for prescription drugs, working alongside Medicare Part D. Only a small number of states still operate one, since Part D now covers much of what these programs used to fill in. See the SPAP Finder.

Spend-Down

A process that lets Medicaid applicants whose income or assets exceed the program's limit become eligible by spending the excess on allowable expenses — medical bills in particular — until they fall within the limit, similar in concept to meeting a deductible. See the Spend-Down Calculator.

SSDI — Social Security Disability Insurance

An earned Social Security benefit for workers who become disabled before retirement age, funded through the same payroll taxes as retirement benefits and based on work history. It converts automatically into a regular retirement benefit at Full Retirement Age. See the SSDI Eligibility Checker.

SSI — Supplemental Security Income

A needs-based federal program, separate from Social Security retirement and SSDI, funded by general tax revenue rather than payroll taxes. It has strict income and asset limits and doesn't require any work history. See the SSI Eligibility & Payment Estimator.

This page is for general educational purposes. Program rules and thresholds change over time — see our Data Sources page for how we source figures, and the relevant calculator linked under each term for current details.