What Is the Difference Between SSI and SSDI in Massachusetts?

SSDI is an insurance benefit you earn by working and paying Social Security tax, while SSI is a needs-based benefit for people with little income and almost no savings, and in Massachusetts that one difference decides how much you are paid, whether the state adds a supplement, whether your health coverage is MassHealth or Medicare, and what an injury settlement does to your check. Both programs are run by the Social Security Administration and both use exactly the same medical definition of disability. Where they part ways is money: SSDI looks at your work record and ignores your savings, and SSI ignores your work record and looks hard at your savings.

If a disability came out of an accident or a work injury and you are trying to sort out how a claim and your benefits fit together, call Jim Glaser Law at (617) JIM-WINS. The line is answered 24 hours a day. The first telephone consultation is free. This page is general information about the law, not legal advice about your situation.

The Short Version

SSDI stands for Social Security Disability Insurance. It is authorized by Title II of the Social Security Act and paid from the disability trust fund that workers’ payroll contributions build. SSI stands for Supplemental Security Income. It is authorized by Title XVI and paid from general tax revenue. The Social Security Administration’s own comparison table, in its Red Book guide to the disability programs, describes SSDI as covering people who are “insured” by their contributions and SSI as covering people who “have limited income and resources.”

Most of what follows is a consequence of that split.

Question	SSDI	SSI
What qualifies you financially	Enough work credits from your own record (or a parent’s or spouse’s, for dependents)	Countable resources at or under $2,000 for one person or $3,000 for a couple, plus low countable income
Where the money comes from	Disability trust fund (payroll contributions)	Federal general revenue, plus a Massachusetts supplement paid by the Commonwealth
How the monthly amount is set	From your lifetime average covered earnings	$994 federal rate in 2026, minus countable income, plus the state supplement
Do savings matter	No; other unearned income and resources do not change the amount	Yes; one dollar over the limit on the first of the month means no SSI that month
Health coverage that comes with it	Medicare, after 24 months of SSDI benefits	MassHealth, automatically, with no separate application
Waiting period	Five full consecutive months of disability before benefits	None; payable from the month after you file
Back pay before the application	Up to 12 months	None
Massachusetts state supplement	None	Yes, under M.G.L. c. 118A, sec. 1
Effect of workers’ compensation	Can reduce the SSDI check	Counts as income and reduces SSI

How Each Check Is Calculated

SSDI: your earnings record sets the number

An SSDI payment is based on the worker’s lifetime average earnings covered by Social Security. Two people with the same diagnosis can receive very different SSDI amounts because they had different careers. The Social Security Administration states plainly that, apart from a few specific offsets, “Other unearned income or resources do not affect your payment amount.” A spouse’s salary, a paid-off house, a retirement account, or money in the bank does not reduce SSDI.

The offsets that do apply are workers’ compensation and certain public disability benefits, such as some state and civil service disability payments. A Massachusetts worker receiving weekly benefits under the workers’ compensation statute, M.G.L. c. 152, can see the SSDI check reduced while both are paid. The comparison of workers’ compensation and disability benefits walks through how those two systems meet.

SSI: a fixed rate, reduced by income, then supplemented

SSI works the other way around. Everyone starts from the same federal benefit rate, which for 2026 is $994.00 a month for an individual and $1,491.00 for a couple. The Social Security Administration then subtracts your “countable income” and the result is your federal SSI payment.

Not every dollar counts. The first $20 of most income is ignored. For wages, the first $65 is ignored and then only half of what remains counts. The Social Security Administration’s own worked example: a person whose only income is a $300 Social Security benefit has $280 of countable income after the $20 exclusion, so the federal SSI payment is $994 minus $280, or $714.

Free or reduced-price shelter from someone else can also count as income, called in-kind support and maintenance. Since September 30, 2024, food is no longer counted that way, so groceries someone buys for you no longer reduce SSI.

Answer Capsule

SSDI and SSI share one medical definition of disability but use opposite financial tests. SSDI, under Title II of the Social Security Act, is earned through work credits, paid from the trust fund, set by lifetime covered earnings, unaffected by savings or other unearned income except workers’ compensation and certain public disability benefits, and brings Medicare after 24 months of benefits, with a five-month waiting period and up to 12 months of back pay. SSI, under Title XVI, requires countable resources of no more than $2,000 for one person or $3,000 for a couple, pays the 2026 federal rate of $994 minus countable income, starts the month after you apply, and in Massachusetts brings automatic MassHealth plus a state supplement under M.G.L. c. 118A, sec. 1: $114.39 a month in 2026 for a disabled individual living independently and paying full living costs, for a total of $1,108.39. A person with a low SSDI check can receive both. This is general information, not legal advice.

What Massachusetts Adds to SSI

The State Supplement Program

Massachusetts is one of the states that pays its own supplement on top of federal SSI. Under M.G.L. c. 118A, sec. 1, the Department of Transitional Assistance runs a program of “state supplementary payments” that supplement the federal Title XVI benefit. The statute allows the payment levels to vary by category, marital status and living arrangement, and the department publishes a new table each year.

The 2026 table, published by the Department of Transitional Assistance and updated November 4, 2025, sets these amounts for an individual living independently:

Category, living independently	Federal SSI	Massachusetts supplement	Total
Disabled, paying full cost of living	$994.00	$114.39	$1,108.39
Disabled, sharing expenses	$994.00	$30.40	$1,024.40
Aged, paying full cost of living	$994.00	$128.82	$1,122.82
Blind, paying full cost of living	$994.00	$149.74	$1,143.74

Different figures apply to someone living in another person’s household, in a rest home, in a Medicaid facility or in assisted living, and to couples. Three practical points from the department’s own page:

• You apply for SSI, not for the supplement. The supplement is based on SSI eligibility, so the application goes to the Social Security Administration.
• It arrives as a second payment. People who receive both get one payment from the Social Security Administration and a separate one from the Commonwealth, usually on the first of the month. On a bank statement the state deposit appears as “COMM OF MASS SSP SUPP.”
• Income slightly too high for SSI does not always end the supplement. The department notes that a person whose income is too high for SSI may still qualify for a state supplement payment, which matches the statute’s reference to people who “would, but for their income, be eligible” for SSI.

The statute also carries a rule worth knowing before anyone moves money around: no state supplement is paid to an applicant who transferred, assigned or encumbered property within the two years before applying in order to become eligible.

MassHealth comes automatically with SSI

MassHealth states that a Massachusetts resident approved for SSI is automatically enrolled and does not need to apply. The card comes in the mail after approval, and address changes reported to the Social Security Administration update the MassHealth record. If SSI stops, MassHealth coverage may change, and MassHealth sends a notice explaining how.

SSDI works differently. It brings Medicare, but Medicare entitlement begins only after you have received SSDI benefits for 24 months. Counting the five-month waiting period before the first SSDI check, that is roughly two and a half years after the disability began before Medicare starts. People in that gap often need MassHealth or other coverage while they wait.

Can You Get Both SSI and SSDI?

Yes. The Social Security Administration calls people who qualify under both programs “concurrent” beneficiaries. It happens when someone has enough work credits for SSDI but the SSDI amount is low, because the earnings record was short or the wages were low, and the person’s savings are under the SSI limit.

The way the two combine follows the SSI formula above. The SSDI check is unearned income for SSI purposes, so $20 of it is ignored and the rest reduces the federal SSI payment dollar for dollar. Using the Social Security Administration’s own example, a person receiving $300 a month in SSDI would also receive $714 in federal SSI, and a Massachusetts resident who is disabled and paying full living costs could also receive the $114.39 state supplement. If the SSDI amount is high enough that countable income exceeds the federal rate, SSI stops, though the state supplement may not.

One more interaction to watch: when both programs pay for the same past months, the Social Security Administration reduces the retroactive SSDI payment by the SSI that would not have been paid had SSDI arrived on time. It calls this the windfall offset. It prevents a double payment for the same months and is not a penalty.

When Benefits Start

The two programs also start at different times, which matters when a family is budgeting around a pending claim.

1. SSDI waits five months. Under 20 C.F.R. 404.315, you must have been disabled for five full consecutive months before benefits are payable. No new waiting period applies if you were entitled to disability benefits within the previous five years, or if you have ALS and your application was approved on or after July 23, 2020.
2. SSDI can reach back up to 12 months before the application date, if you were disabled and insured during those months.
3. SSI does not wait, but it does not reach back. Under 20 C.F.R. 416.335, the earliest month SSI can be paid is the month after the month you file. Delay in filing is money lost.
4. The state supplement follows SSI. It is paid on the same schedule once SSI eligibility exists.
5. MassHealth follows SSI; Medicare follows SSDI by 24 months.

The practical lesson in that list is that a person who might qualify for SSI should not wait to file, because SSI has no back pay before the application month. The step-by-step application guide covers where and how to file.

What an Injury Settlement Does to Each Program

This is where the difference between the programs becomes urgent for people hurt in a crash, a fall or at work.

SSDI is generally untouched by a personal injury settlement. Because the Social Security Administration says other unearned income and resources do not affect the SSDI amount, a lump sum from a car accident claim does not reduce the SSDI check. Workers’ compensation is the important exception: weekly benefits and some lump sums under c. 152 can trigger the offset described above, and how a workers’ compensation settlement is structured can matter to it.

SSI is directly affected by a settlement. Money received is income in the month it arrives and, if kept, a resource from the next month. A settlement that leaves more than $2,000 in countable resources on the first of a month means no SSI for that month, and because MassHealth comes with SSI, health coverage can be affected too. The Social Security Administration’s own rules list several tools that do not count:

• An ABLE account, up to $100,000, for a person whose disability began before the age limit set by that program.
• Certain trusts, under rules the Social Security Administration explains in its trust guidance.
• Spending on excluded items, such as the home you live in, household goods, and one vehicle of any value used for transportation.
• Retroactive SSI or Social Security benefits, which are not counted as a resource for nine months after you receive them.

The same rules warn about the obvious shortcut. Giving a resource away, or selling it for less than it is worth, can make a person ineligible for SSI for up to 36 months, and the Massachusetts supplement statute has its own two-year transfer rule. Any plan for settlement money should be made before the money arrives, not after.

A Massachusetts injury claim also carries its own repayment duties, including MassHealth’s right to be repaid from a recovery. See medical liens on an injury settlement for how those work.

Which One Should You Apply For?

Often both. The medical test is identical, and the Social Security Administration can take the application for both programs at once. A rough guide:

• Long work history, some savings: SSDI is the likely program; savings do not matter to it.
• Little or no work history, almost no savings: SSI is the likely program.
• Short or low-wage work history and almost no savings: possibly both, as concurrent benefits.
• Under 18: a child’s own SSI claim is possible, though a parent’s income and resources are partly counted; a child may also receive benefits on a parent’s SSDI record.

In Massachusetts, 163,417 people received SSI and 153,966 disabled workers received SSDI as of December 2024, according to the Social Security Administration’s state statistics. The two groups overlap.

Key terms

• SSDI (Social Security Disability Insurance): the Title II disability benefit paid to insured workers and their dependents from the trust fund their payroll contributions build.
• SSI (Supplemental Security Income): the Title XVI needs-based benefit for people who are aged, blind or disabled and have limited income and resources.
• Countable resources: the cash and property the Social Security Administration counts toward the SSI limit, after excluding items such as the home, one vehicle and household goods.
• Concurrent benefits: receiving SSDI and SSI at the same time, with the SSDI check counted as income that reduces the SSI payment.
• State Supplement Program (SSP): the Massachusetts payment under M.G.L. c. 118A, sec. 1 added to SSI by the Department of Transitional Assistance.
• Windfall offset: the reduction of retroactive SSDI by the SSI already paid for the same months.

Frequently Asked Questions

Q: Is SSI the same as Social Security?

A: No. SSI is administered by the Social Security Administration, but it is a separate needs-based program funded from general tax revenue under Title XVI. Social Security retirement and SSDI are earned benefits paid from the trust funds under Title II. SSI has strict income and resource limits; SSDI does not.

Q: Is SSDI or SSI better?

A: Neither is better in general; they serve different people. SSDI usually pays more to someone with a solid work history and does not care about savings, but it has a five-month waiting period and Medicare starts only after 24 months of benefits. SSI starts sooner and brings MassHealth automatically in Massachusetts, but it caps countable resources at $2,000 for one person.

Q: Can I get SSI and SSDI at the same time in Massachusetts?

A: Yes, if your SSDI amount is low and your countable resources are under the SSI limit. The SSDI check counts as income after a $20 exclusion, so SSI fills the gap up to the $994 federal rate in 2026, and the Massachusetts supplement can be added on top.

Q: How much is SSI in Massachusetts in 2026?

A: The federal rate is $994.00 a month for an individual. For a disabled individual living independently and paying the full cost of living, the Massachusetts supplement adds $114.39, for a total of $1,108.39. Other living arrangements, couples, and aged or blind recipients have different amounts in the Department of Transitional Assistance’s 2026 table.

Q: Do I get MassHealth or Medicare?

A: SSI recipients in Massachusetts are enrolled in MassHealth automatically. SSDI recipients become entitled to Medicare after receiving SSDI benefits for 24 months. A person receiving both may have both.

Q: Does having money in the bank affect SSDI?

A: No. The Social Security Administration states that other unearned income and resources do not affect the SSDI payment amount. Savings matter only for SSI, where the countable resource limit is $2,000 for an individual and $3,000 for a couple.

Q: Will a car accident settlement stop my disability benefits?

A: It generally does not reduce SSDI. It can stop SSI for any month in which countable resources exceed the limit, which can also affect MassHealth. Tools the Social Security Administration recognizes, such as an ABLE account or certain trusts, can change that result, and transferring money away for less than its value can cause up to 36 months of ineligibility.

Q: Is Jimmy Knows AI giving me legal advice?

A: No. This page is general information about Massachusetts and federal law for educational purposes. It is not legal advice for your situation and does not create an attorney-client relationship. For advice about your own case, call Jim Glaser Law at (617) JIM-WINS.

Talking to a Lawyer

When a disability follows an injury, the benefits claim and the injury claim affect each other: a workers’ compensation award can reduce SSDI, and a settlement can end SSI and the MassHealth that comes with it. Planning that before money changes hands is far easier than repairing it afterwards. If you want to talk it through, call Jim Glaser Law at (617) JIM-WINS. The line is answered 24 hours a day. The first telephone consultation is free.