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Umbrella Insurance

Umbrella insurance sits on top of the home, auto, and watercraft liability layers and pays above their per-occurrence limits up to the umbrella’s own limit. It also broadens coverage to liability types the underlying policies exclude — libel, slander, false arrest, and the rest of the “personal injury” tail the auto/home base does not pick up.

A $1M umbrella starts around $300–$500 per year for a low-risk household; subsequent millions are priced at $100–$300 each, with the marginal cost rising past $5M.

Sizing it. The common advice — “buy coverage equal to your net worth” — is close but measures the wrong quantity. A plaintiff’s attorney cannot reach assets that are statutorily exempt from creditors. What they can reach is the attachable balance sheet, and that is what the umbrella needs to cover:

L^{*} = \underset{attachable assets}{\underset{⏟}{NW - E}} + \underset{garnishable future earnings}{\underset{⏟}{\sum_{t = 1}^{n} \frac{γ w_{t}}{{(1 + r)}^{t}}}}

where $E$ is the value of your exempt assets — qualified retirement plans protected by the ERISA anti-alienation provision (ERISA §206(d)) at 29 U.S.C. §1056(d) and IRC §401(a)(13), IRA balances up to the state or federal cap, homestead equity to the state limit, and in some states life insurance cash value and annuities (section “Federal Shields” and section “State Shields”) — $w_{t}$ is future wage income, $γ$ is the fraction of it a judgment creditor can actually reach, $n$ is your remaining working years, and $r$ is a discount rate; use the same risk-free-plus-premium rate you discount human capital with (section “Calculating Human Capital”), since this term is the creditor’s claim on your human capital.

That last term is where most write-ups go wrong by leaving $γ$ at 1. Federal law caps ordinary wage garnishment at 25% of disposable earnings (Consumer Credit Protection Act, 15 U.S.C. §1673), so $γ \leq 0.25$ everywhere — and Texas, Florida (for a head of household), North Carolina, Pennsylvania, and South Carolina bar wage garnishment for ordinary judgments outright, making $γ = 0$ . Domicile does not merely shift the exempt-asset term; it can delete the future-earnings term entirely.

Three things fall out, and they are the reasons to write it down. First, a $4 million net worth held mostly in a 401(k) and a Texas or Florida homestead may have an attachable balance of well under $1 million, while a $4 million net worth held in a taxable brokerage account is attachable nearly in full. Identical net worth, wildly different coverage need. Second, the future-earnings term is why a 35-year-old surgeon with a negative net worth still needs serious limits: a judgment can follow them for decades against income they have not earned yet. Put a number on it: at $γ = 0.25$ on $500,000 of annual earnings over $n = 30$ years, discounted at 5%, the term is $0.25 \times $ 500, 000 \times \frac{1 - 1.0 5^{- 30}}{0.05} \approx $ 1.9$ million of garnishable future earnings — on top of whatever the attachable-asset term says, and starting from a net worth of less than zero. Third, that same surgeon in Texas needs materially less umbrella than in New Jersey — same body, same specialty, same malpractice risk, $γ = 0$ versus $γ = 0.25$ on thirty years of earnings.

Maximizing $E$ is cheaper than insuring against it. Every dollar you move from a taxable account into a qualified plan reduces both your tax bill and your required umbrella limit — one of the few places in this book where two objectives point the same direction with no trade-off.

The frame that actually justifies the premium. Most umbrella dollars are never paid to a claimant. They are spent on defense. The insurer has a duty to defend, and on most personal umbrella forms defense costs are paid outside the limit — so a $5M policy that defends a meritless $20M claim through three years of litigation and wins has delivered several hundred thousand dollars of value while paying the plaintiff nothing. You are buying a law firm on retainer, and the indemnity payment is a bonus. That is also why raising limits is so cheap: the insurer’s expected loss barely moves, but yours does.

Verify the defense provision instead of assuming it. Forms differ: defense outside the limit is standard when the umbrella sits above underlying coverage that has already been exhausted, but some policies erode the limit with defense costs when the umbrella drops down as primary — for a liability type the underlying policies exclude, for instance. Ask the broker which form you have and where defense costs sit. It is a one-sentence question with a six-figure answer.

What the umbrella excludes. Read the exclusions before you rely on the limit. Personal umbrella forms exclude business pursuits — which reaches rental real estate on most forms — along with professional services, intentional acts, and most liability you assumed by contract. The landlord running an LLC per property (section “Entity Structures”) still needs a landlord (dwelling-fire) liability policy on each property and, at portfolio scale, a commercial umbrella above them; the personal umbrella covers the personal sphere only, and carriers differ on whether a small number of rental units can be scheduled onto it. Ask the broker which of your activities sit outside the form, and close each gap with the policy built for it — professional liability for the practice, D&O for the board seat, a commercial umbrella for the rentals.

The high-net-worth sizing question — start at $5M, scale to match attachable net worth, and stack excess-liability towers above the primary umbrella — is treated in section “Umbrella and Excess Liability as the First Line”.

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