How much umbrella do operators want, and why does my certificate keep failing on it?

People use "umbrella" and "excess" interchangeably. The difference matters when an operator's contract team reads your policy.

A follow-form excess policy is, in IRMI's words, excess coverage that is "subject to all of the terms and conditions of the policy beneath it." If the excess and the underlying conflict, the underlying controls. Many excess policies say they follow form but carve out exceptions, which means they are not truly follow form.

An umbrella is usually written over several primary policies at once (GL, auto, employers liability) and may provide protection for some claims the underlying policies do not cover. When it does, it can "drop down" over a self-insured retention. It also has its own exclusions, and those can be narrower than the underlying in ways that matter on a lease, pollution being the big one.

For an oilfield contractor, the practical difference is this: with true follow-form, the AI, waiver and pollution buyback on your GL are more likely to carry up. With an umbrella on its own form, you have to read the umbrella's own terms to know.

Every umbrella has a schedule of underlying insurance. It lists which policies the umbrella sits over and the limits it assumes are in place. A typical small oilfield program might look like the illustration below. The numbers are an example, not a recommendation.

Two things follow from the schedule:

• The umbrella only stacks on what is scheduled. If employers liability is not on the schedule, an MSA that asks for "$1,000,000 EL plus umbrella" is not satisfied by your umbrella.
• You must keep the underlying limits in force. If an underlying policy lapses or its aggregate is used up and the umbrella does not drop down, you can be left with a gap between what you have and where the umbrella starts.

When an MSA says "$5,000,000 umbrella," it usually means $5,000,000 of umbrella or excess over the primary limits. When it says "$5,000,000 total" or "combined," the primary limits may count toward that number. Ask the operator which one they mean before you buy limits you do not need.

MSAs commonly require the operator group to be an additional insured "on all liability policies, including umbrella and excess." Whether your umbrella does that depends on its definition of who is an insured.

Many umbrella forms extend insured status to anyone who is an insured on a scheduled underlying policy. Some limit that to parties you agreed to cover in a written contract, and only up to the limits that contract requires. Others extend nothing automatically and need an endorsement.

The contract-limited version is worth noticing. If the MSA requires $2,000,000 of limits and you carry a $5,000,000 umbrella, the operator's AI coverage on the umbrella may be capped at what the contract required. That is normal and usually acceptable, but it surprises people.

On a certificate, the umbrella line should show the AI box checked only if the umbrella actually extends AI status. A reviewer at ISNetworld or Avetta may ask for the umbrella form or endorsement to prove it. See what is a blanket additional insured endorsement.

This one generates more back-and-forth with operators than anything else on the umbrella line.

Operators want your insurance to pay before theirs, and they want their own insurance to not be asked to share. On the GL, that is handled with a primary and non-contributory endorsement. See what is primary and non-contributory.

An umbrella is, by design, excess. Its "other insurance" condition usually says it is excess over any other valid insurance. Read literally, that could include the operator's own primary policy, which is the opposite of what the operator wants.

The fix depends on the form:

• Some umbrellas say they apply on a primary and non-contributory basis to an additional insured's own insurance when a written contract requires it.
• Others need an endorsement to say so.
• A few will not do it at all, which is a problem if you work for operators who insist.

Ask your agent to show you the actual umbrella language, not just a checked box on the certificate.

Most umbrellas carry a pollution exclusion. Some give back coverage only to the extent the underlying GL has a time-element buyback, and only for the same narrow conditions. A few exclude pollution outright.

This matters in two ways:

• An MSA that says "pollution liability $5,000,000" cannot usually be met by stacking a $1,000,000 GL buyback under a $4,000,000 umbrella, unless the umbrella clearly follows the buyback.
• A CPL policy is rarely scheduled under the umbrella. Its limit stands alone.

If you need high pollution limits, the answer is usually a CPL policy with that limit, or an excess pollution layer on top of it. See oilfield pollution liability.

Certificates are summaries. Under the Texas Insurance Code, "a certificate of insurance is not a policy of insurance" and does not change the policy it describes, and a certificate cannot alter the notice terms the policy requires. Reviewers know that, which is why they ask for endorsements. The most common failures:

In Texas, umbrella limits are not just a contract box to check. They can decide how much indemnity you actually owe.

Under Texas Civil Practice and Remedies Code Section 127.005, the anti-indemnity rule does not apply where the parties agree in writing that the indemnity will be supported by insurance. For a mutual indemnity obligation, the indemnity is limited to the extent of the coverage and dollar limits each party agreed to obtain for the other. For a unilateral indemnity, the amount of insurance required "may not exceed $500,000."

That means the limits you agree to carry for the operator, including umbrella limits, can define your indemnity exposure under a mutual knock-for-knock MSA. Raising limits to satisfy a certificate requirement can also raise what the operator can collect under the indemnity. Before you agree, read the indemnity section and the insurance section together. See Texas oilfield anti-indemnity act and does Chapter 127 require mutual insurance.