Endorsement
An add-on or change to the standard policy — extra coverage bolted on. Sometimes called a rider.
Most personal insurance is sold on standardized forms. The base contract reads the same for thousands of policyholders, which keeps it predictable but also keeps it generic. An endorsement is the document that changes that base contract for one policy. In life insurance, and in some older usage elsewhere, the same idea is called a rider.
Endorsements do not only add coverage. One can add something the base form leaves out, remove something the base form includes, raise or lower a limit, or rewrite a definition so a word means something narrower. Insurers use them to tailor a policy in both directions, and a removal endorsement is just as binding as an addition.
On the declarations page they appear as a list of form numbers and edition dates, usually in small type near the bottom. Common personal examples include water backup, scheduled personal property, ordinance or law, and rental reimbursement on auto.
Because an endorsement is part of the contract, it generally carries its own price, its own effective date, and sometimes its own deductible. Adding one mid-term usually produces a new dec page and a prorated charge covering the remaining days of the policy period.
Availability is not universal. The same endorsement can be offered by one insurer and not another, filed in some states and not others, or restricted in areas where the exposure is heavy — coastal wind, wildfire, hail. What can be added at one renewal is not always on the menu at the next.
In real life
A homeowner finishes a basement and moves a home office into it. The standard policy caps business property in the home at a low figure and leaves sewer backup out entirely. Two endorsements go on at renewal: water backup with a $10,000 limit for $65, and an increase to the business property cap for $40. The dec page grows by two form numbers and $105.
Common questions
What is the difference between an endorsement and a rider?
In practice they describe the same thing: a document that amends the base policy. Rider is the more common word in life and health insurance, while endorsement is standard in auto, home and renters. Some insurers also say amendment or change form. What matters is the form number printed on the declarations page, not the label used.
Can an endorsement take away coverage?
Yes. Endorsements move in both directions. Common restrictive ones exclude a named driver from an auto policy in states that allow it, limit or remove damage from a particular cause, cap a category of property, or apply a separate percentage deductible in high-wind areas. A restrictive endorsement carries the same legal weight as one that adds coverage.
Does adding an endorsement to my policy cost extra?
Usually there is an added charge, though some endorsements are included at no cost and a few reduce the price because they narrow coverage. Adding one part way through a term is normally prorated for the days remaining, and a new declarations page is issued showing the added form number.
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Definitions describe how these terms are generally used across the U.S. market. Wording, limits and exclusions vary by insurer, policy form and state — the policy you hold is what controls. See the full Insurance Glossary.