Disability insurance has its own vocabulary, and most of it is designed to sound clearer than it actually is. This glossary defines every term and abbreviation you're likely to encounter in a policy document, a benefits summary from your employer, or a conversation with a broker. Each definition is written in plain language, with a note on why the term matters and where it shows up in practice.
For a full introduction to how disability insurance works, start with our complete guide to disability insurance.
A
Activities of daily living (ADLs)
The six basic self-care tasks insurers use to measure severe disability: bathing, dressing, eating, toileting, continence, and transferring (moving from a bed to a chair). Some policies include a catastrophic benefit rider that pays an additional benefit if you cannot perform two or more ADLs without help. This is a higher bar than standard disability and triggers only in serious cases.
Any-occupation (any-occ)
A definition of disability that requires you to be unable to perform the duties of any job you are reasonably qualified for by education, training, or experience. This is the strictest standard and the hardest to meet. Most employer group plans switch from own-occupation to any-occupation after 24 months. If you can sit at a desk and answer phones, an any-occ policy may deny your claim even if you can no longer do the job you were actually trained for. See also: own-occupation, true own-occupation.
B
Benefit amount
The monthly dollar amount your policy pays during a qualifying disability. Individual policies typically replace 60% to 80% of your pre-disability income. Employer group plans usually cap at 60% of base salary, often with a flat monthly dollar maximum on top of the percentage. The benefit amount is set when you buy the policy (or enroll in a group plan) and does not change unless you exercise a future purchase option or carry a COLA rider.
Benefit cap
The flat dollar maximum a plan will pay per month, regardless of what the percentage formula produces. Employer group plans commonly cap benefits between $10,000 and $15,000 per month. A person earning $300,000 with a 60% plan would expect $15,000 per month, but if the cap is $12,000, the cap is what they get. Caps disproportionately affect higher earners. See our guide to employer disability coverage for worked examples.
Benefit period
How long benefits continue once they start. Common options are 2 years, 5 years, 10 years, or to age 65, 67, or 70. A longer benefit period costs more but protects against a disability that lasts decades. Most financial planners recommend a benefit period to at least age 65 for individual policies.
Business overhead expense insurance (BOE)
A separate policy that covers the fixed operating costs of a business (rent, utilities, employee salaries, equipment leases) while the owner is disabled. BOE does not replace the owner's personal income. It runs for 12 to 24 months, which is usually enough time to either recover or sell or transition the practice. Premiums are tax-deductible as a business expense, but benefits are taxable income. BOE is most relevant for solo practitioners and small practice owners. See our full guide to BOE insurance.
C
COLA (cost of living adjustment)
A rider that increases your monthly benefit each year during a long-term claim, usually by 1% to 3% compounded, to keep pace with inflation. Without COLA, a $6,000 monthly benefit bought today will still pay $6,000 in 20 years, when that amount buys significantly less. COLA riders typically add 10% to 20% to the base premium. Most valuable for younger buyers whose potential claims could last decades.
Catastrophic benefit rider
An optional rider that pays an additional benefit on top of the standard disability benefit if you suffer a severe disability, usually defined as loss of two or more activities of daily living, total loss of sight, or total loss of use of two limbs. Group employer plans rarely include this. Individual policies may offer it as an add-on.
D
Definition of disability
The single most important clause in any disability insurance policy. It determines what you have to prove to qualify for benefits. The three main definitions are own-occupation, any-occupation, and true own-occupation. The specific wording varies by carrier and policy form number, and the marketing name does not always match what the contract says. Read the actual contract language before buying.
Dual occupation
A clause interpretation some insurers use against practice owners (dentists, physicians, attorneys with their own firms). If you both practice and manage your business, the insurer may define you as holding two occupations. If a disability stops your clinical work but you continue managing the practice, the insurer can classify the claim as partial rather than total, reducing your benefit. This can apply even under a true own-occupation policy. Practice owners should ask how their carrier defines their occupation before filing a claim.
E
Elimination period (waiting period)
The number of days you must be continuously disabled before benefits begin. Common options are 30, 60, 90, or 180 days. A 90-day elimination period is the most common choice for individual policies because it balances cost against risk. Shortening the elimination period from 90 to 60 days can raise the premium by 30% or more, while extending it from 90 to 180 days saves less than 15%. You need enough savings or short-term disability coverage to bridge the gap.
ERISA (Employee Retirement Income Security Act)
The federal law that governs most employer-sponsored benefit plans, including group disability insurance. If your employer's LTD plan is ERISA-governed and your claim is denied, your legal options are limited. There is no jury trial. The judge reviews only whether the insurer's decision was "reasonable" based on the existing claim file. You generally cannot introduce new evidence that wasn't in the file when the denial was made. Individual policies bought outside of employment are not subject to ERISA and give the claimant a much stronger legal position. See our employer disability insurance guide for more on ERISA's impact.
F
FMLA (Family and Medical Leave Act)
A federal law that protects your job for up to 12 weeks of unpaid leave per year for a serious health condition, childbirth, or caring for a family member. FMLA applies only to employers with 50 or more employees within 75 miles, and only after you've worked there for at least 12 months and 1,250 hours. FMLA protects your job but does not pay anything. Short-term disability insurance is what replaces your income during that leave.
Future purchase option (FPO) / Future increase option (FIO)
A rider that lets you increase your coverage amount as your income grows, without going through new medical underwriting. You'll still need to prove your income increased, but you won't be asked health questions or undergo medical exams. This is especially valuable for people early in their careers (residents, new attorneys, young dentists) whose income will grow substantially. The rider typically expires around age 50 or 55. If you don't exercise it, you keep the coverage you have. Carriers use different names for this rider, but FPO and FIO mean the same thing.
G
Graded premiums (stepped premiums)
A pricing structure where your premium starts lower and increases at scheduled intervals (usually every 5 years). The alternative is level premiums. Graded premiums make a policy more affordable in the early years but cost more over the life of the policy. If you plan to hold coverage for 20 or more years, level premiums are usually cheaper in total.
GSI (Guaranteed Standard Issue)
A type of individual disability policy available through a professional association, residency program, or employer affiliation that requires no individual medical underwriting. You answer no health questions and take no medical exams. GSI policies are typically more expensive (roughly 30% more than fully underwritten policies) and may have lower benefit caps, but they are sometimes the only option for people with pre-existing conditions who would be declined or heavily rated through normal underwriting. Common for medical residents. The enrollment window is usually limited and non-renewable.
Guaranteed renewable
A policy provision that requires the insurer to renew your policy each year as long as you pay the premium. The carrier cannot cancel the policy or change its terms, but unlike a non-cancellable policy, the carrier can raise the premium for your entire rating class (though not for you individually). Guaranteed renewable is the minimum standard worth accepting. It is weaker than non-cancellable.
I
Income replacement ratio
The percentage of your pre-disability income that your policy replaces. Individual policies typically offer 60% to 80%. Employer group plans usually offer 40% to 67%, most commonly 60% of base salary only (excluding bonuses, commissions, and other compensation). The actual take-home replacement is lower than the stated percentage when benefits are taxable, which happens when the employer pays the premium.
Informal underwriting inquiry (soft quote)
A preliminary review of your medical and financial profile by one or more carriers, conducted through your broker, before you submit any formal application. Nothing goes on your permanent record through the MIB. The carrier provides an indication of how they would likely rate you. This protects you from a formal decline that could follow you to other carriers. Particularly important for anyone with even minor medical history. An experienced independent broker can run your profile across all five major carriers informally before you apply to the one most likely to offer clean terms.
L
Level premiums
A pricing structure where your premium stays the same for the life of the policy (assuming a non-cancellable contract). Level premiums cost more initially than graded premiums but are typically cheaper over a 20- to 30-year holding period. The premium you lock in at age 28 is the premium you pay at age 55.
LTD (long-term disability insurance)
Coverage that replaces a portion of your income during a disability lasting months to years. Benefit periods range from 2 years to age 65 or beyond. Elimination periods are typically 90 to 180 days. LTD can come through an employer group plan or as an individual policy. The two differ significantly in tax treatment, portability, definition of disability, and legal protections. See our long-term disability insurance guide.
M
MIB (Medical Information Bureau)
A database that insurance companies use to share information about applicants. When you apply for disability (or life) insurance and undergo underwriting, coded information about your health history is stored in the MIB. A formal application that results in a decline is visible to other carriers when you apply again. This is why the informal underwriting inquiry exists: it lets you test the waters without creating a permanent record of a rejection.
Mental health/nervous condition limitation
A clause in many policies (especially group plans) that limits benefits for disabilities caused by mental health conditions to 24 months, even if the disability itself lasts longer. Conditions commonly subject to this limit include depression, anxiety, bipolar disorder, PTSD, and substance use disorders. After the 24-month cap, benefits stop regardless of whether you've recovered. Some individual policies offer better mental health coverage, but this is a standard limitation across most of the market.
Modified own-occupation
A definition of disability that pays benefits if you cannot perform the duties of your own occupation and you are not working in any other occupation. The moment you take any other paying work, benefits stop, even if that work pays a fraction of what you earned before. This is the critical difference from true own-occupation, which continues to pay even if you earn income in a different capacity. "Own-occupation" in a marketing brochure without the word "true" is often modified own-occ. Read the contract. See our guide to own-occupation insurance for all four types.
N
Non-cancellable (non-can)
The strongest policy guarantee available. A non-cancellable policy means the carrier cannot raise your premium, change your benefits, or cancel your policy for any reason as long as you pay the stated premium on time. This is stronger than guaranteed renewable, which allows class-wide premium increases. "Non-cancellable and guaranteed renewable" together is the gold standard. If you're buying individual coverage, this is what you want.
O
Occupation class
A rating category that carriers assign to your profession, which affects your premium and the policy features available to you. Classes range from 1 (highest risk, most expensive) to 5A or 6A (lowest risk, least expensive). Physicians, dentists, attorneys, and accountants typically receive favorable class ratings (4A or 5A). The same profession can receive different class codes at different carriers. Within dentistry, for example, carriers may distinguish between general dentists, oral surgeons, orthodontists, and endodontists with separate sub-classes. Your class determines not just price but which riders and benefit structures the carrier will offer you.
Own-occupation (own-occ)
A definition of disability based on your inability to perform the material duties of your specific occupation, rather than any job at all. This is a broader, more protective standard than any-occupation. However, "own-occupation" is not one thing. There are four variants: true own-occupation, modified own-occupation, transitional own-occupation, and two-year own-occupation. The differences between them can mean the difference between collecting full benefits and collecting nothing. See our complete own-occupation guide and our deep dive on true own-occupation.
P
Partial disability / Residual disability
A policy provision that pays a proportional benefit when you can still work but at reduced capacity, reduced hours, or reduced income. Most policies trigger this at a 15% to 20% loss of income. Without this provision, you either qualify for full benefits or get nothing. For many disabilities, especially musculoskeletal conditions, recovery is gradual and partial work is possible long before full return. A residual disability rider fills the gap during that transition.
Pre-existing condition exclusion
A policy clause that excludes coverage for conditions diagnosed or treated within a specific window before the policy took effect, typically 9 to 12 months. If you saw a doctor for back pain six months before buying the policy, and that back condition later becomes a disability, the claim may be denied under this exclusion. This is why buying early (before health issues develop) and using the informal inquiry process are both important. GSI policies sometimes waive or reduce this exclusion.
S
SSDI (Social Security Disability Insurance)
The federal disability benefit program funded through payroll taxes. SSDI pays a monthly benefit to workers who are unable to perform any substantial gainful activity, not just their own occupation. The average monthly SSDI benefit in 2026 is approximately $1,630 to $1,816 depending on the source. The initial approval rate is roughly 20% to 25%, and the application process typically takes months. SSDI has a mandatory 5-month waiting period. Most employer group LTD plans include an SSDI offset that reduces the group benefit by whatever SSDI pays.
SSDI offset
A provision in nearly all employer group LTD plans (and some individual policies) that reduces your disability benefit by the amount you receive from SSDI. If your group plan pays $10,000 per month and you qualify for $1,816 in SSDI, the group plan pays only $8,184. You do not receive $10,000 plus $1,816. The offset means your total disability income is capped at the group plan's stated maximum, not stacked on top of it. This is one of the most commonly misunderstood aspects of employer disability coverage.
STD (short-term disability insurance)
Coverage that replaces a portion of your income during a disability lasting a few weeks to a few months, typically 3 to 6 months. Elimination periods are short (7 to 14 days). STD bridges the gap between the start of a disability and when long-term disability kicks in. Most STD comes through employer plans. A few states (California, New York, New Jersey, Rhode Island, Hawaii) mandate some form of short-term disability coverage. See our short-term disability guide.
Student loan repayment rider
An optional rider that directs additional benefit dollars specifically toward student loan payments during a disability claim. Available from some carriers, with caps typically around $2,500 per month. Most relevant for physicians, dentists, and attorneys carrying $150,000 to $350,000 or more in professional school debt.
T
True own-occupation (true own-occ)
The most protective definition of disability available. A true own-occupation policy pays benefits if you cannot perform the material duties of your specific occupation, regardless of whether you are working in another capacity and earning income elsewhere. A surgeon who can no longer operate but works as a medical consultant still collects full benefits. The key contract test: if the phrase "not engaged in any other occupation" appears anywhere in the disability definition, it is not true own-occupation, no matter how it was marketed. True own-occ costs 8% to 20% more than modified own-occ. Five carriers offer it: Guardian, MassMutual, Ameritas, Principal, and The Standard. See our complete guide to true own-occupation insurance.
24-month transition (own-occ to any-occ switch)
A clause in most employer group LTD plans (and some individual policies) that changes the definition of disability after 24 months of benefits. For the first two years, you qualify under an own-occupation standard. After that, the definition switches to any-occupation. This is the point where many long-term claims are terminated, because the insurer re-evaluates whether you can do any job, not just your own. It is also where the mental health 24-month limitation typically aligns. Individual policies with true own-occ to age 65 avoid this switch entirely.
W
Waiver of premium
A standard policy feature (not usually a separate rider) that waives your premium payments once you are receiving disability benefits. You stop paying the premium for as long as you are collecting benefits, and the policy stays in force. This prevents the ironic situation of losing income to a disability and then losing your coverage because you can't afford the premium.
Looking for guidance on a specific topic? Our guides cover disability insurance for doctors, insurance for dentists, insurance for lawyers, coverage for the self-employed, what disability insurance costs, and whether your employer's coverage is enough.