valuation distinction
Coinsurance vs. Deductible
Both coinsurance and deductibles reduce what an insurer pays, which is why candidates confuse them. They operate on entirely different logic and at different points in the calculation.
Reviewed September 2026 · Exam outline effective September 1, 2026
A deductible is a fixed amount the insured absorbs on a covered loss. Coinsurance is a property provision that penalizes inadequate insurance relative to a required percentage of value.
Deductible
The amount of a covered loss the insured retains before the insurer pays.
- Applies to essentially every covered loss under the applicable coverage
- Amount is stated on the declarations
- Does not depend on whether the limit is adequate
- Subtracted after the loss value is established
Coinsurance
A property provision requiring insurance equal to a specified percentage of value, reducing recovery when that requirement is not met.
- Triggered only when the amount of insurance falls short of the requirement
- Reduces the recovery proportionally to the shortfall
- Frequently expressed as a percentage such as eighty percent
- Commonly encountered in commercial property contexts
Side by side
| Dimension | Deductible | Coinsurance |
|---|---|---|
| What triggers it | Any covered loss | Underinsurance relative to the required percentage |
| How it reduces payment | Fixed subtraction | Proportional reduction based on the shortfall |
| Depends on limit adequacy | No | Yes |
| Where it appears | Declarations for most coverages | Property loss conditions |
| Insured behavior it targets | Small-claim frequency | Insuring to value |
When each one applies
Order of operations matters
Establish the loss value, apply any coinsurance reduction the question raises, then apply the deductible, and finally cap the result at the applicable limit. Working out of order produces a wrong number even when every individual concept is understood.
Coinsurance is not a penalty for filing a claim
It responds to the relationship between the amount of insurance carried and the required percentage of value. A fully insured property does not incur a coinsurance reduction regardless of claim size.
Read for the percentage
If a question supplies a coinsurance percentage and a value, it is almost certainly asking you to test adequacy. If it supplies only a deductible, it is a simpler subtraction problem.
The trap
Applying a coinsurance reduction when the property is insured at or above the required percentage. Confirm the shortfall exists before reducing anything.
Worked example
A commercial building is valued at $500,000 with an eighty percent coinsurance requirement, meaning $400,000 of insurance is required. The insured carries $300,000. Because the amount carried is less than the amount required, recovery on a covered partial loss is reduced in proportion to that shortfall, and the deductible is then applied to the reduced figure, with the total payment capped at the policy limit.
Frequently asked
- Does coinsurance apply to total losses?
- Application varies by form and by how the question is framed. Coinsurance provisions are most commonly tested in the context of partial losses, so read the specific provision described.
- Can a policy have both?
- Yes. A commercial property policy commonly carries both a deductible and a coinsurance requirement, and both can affect the same loss.
- Is coinsurance the same as the health insurance term?
- No. In health insurance, coinsurance describes ongoing percentage cost sharing. In property insurance, it is an insure-to-value requirement.
Full course
Study this with the complete Texas All-Lines course
This concept is covered in depth in the "Limits, Deductibles, Coinsurance & Other Insurance" lesson, alongside every other topic on the content outline.
Terms in this comparison
- CoinsuranceCoinsurance is a property condition requiring the insured to carry a limit equal to a stated percentage of the property’s value, reducing the recoverable amount when the limit carried falls short.
- DeductibleA deductible is the amount of a covered loss the insured absorbs before the insurer pays, which keeps small claims out of the system and holds premium down.
- Policy limitA policy limit is the maximum amount an insurer will pay for a covered loss under a particular coverage, stated on the declarations page.
- Actual cash valueActual cash value is a settlement method that pays the value of damaged property at the time of loss, typically reflecting replacement cost reduced by depreciation.
- DepreciationDepreciation is the reduction in value of property from age, wear, and obsolescence, subtracted from replacement cost to arrive at actual cash value.
Other distinctions to drill
- ACV vs. RCVActual cash value and replacement cost value are two ways of answering the same question: how much is the insurer obligated to pay for damaged property? They frequently produce different numbers from identical loss facts, which is exactly why the Texas All-Lines exam tests them together.
- Exclusion vs. ConditionExclusions and conditions both narrow what an insurer ultimately pays, but they do it through different mechanisms. Distinguishing them cleanly is one of the fastest ways to improve accuracy on policy-structure questions.
Sources
- Pearson VUE — Texas Department of Insurance licensing exams
Scheduling, candidate handbook, content outlines, test-center rules, and application timing. Reviewed 2026-07-21.
Requirements, fees, forms, exam details, and deadlines can change. Verify the current rule with the linked authority before scheduling, applying, renewing, or handling a real claim.
For exams on or after September 1, 2026. If your exam is scheduled earlier, use the outline that applies to your exam date. Texas Exam Academy is independent exam preparation and is not affiliated with or approved by the Texas Department of Insurance or Pearson VUE. Verify current eligibility, fees, forms, and requirements with the responsible authority.