Does Alaska Allow UM/UIM Stacking? The Statutes and the Cases

By the FigureMyTax Editorial Team · How we calculate

Not within one policy. Alaska's statutes limit the payable amount to the highest limit of any one coverage, and the courts have treated clearly written anti-stacking clauses as consistent with them.

The statutory text appears twice

Alaska has two chapters on motor vehicle insurance that carry the same rule. AS 28.22.221, in the Mandatory Automobile Insurance Act, and AS 28.20.445(c), in the older financial responsibility chapter, both say the maximum amount payable may not exceed the highest limit of any one coverage when two or more vehicles are insured under one policy, and that for several policies from the same insurer in the same household the maximum payable may be limited to the highest single limit.

The priority order for separate policies

If you are entitled to UM/UIM coverage under more than one policy, payments are made in this order, each subject to its own limit: first, coverage on a vehicle you occupied (or on a pedestrian as the named insured); then coverage on a vehicle you occupied as an insured other than the named insured; then policies not covering the vehicle but covering you as the named insured; then as another insured; and then excess or umbrella coverage in the same sequence.

What the courts added

A footnote in the Alaska Supreme Court's 2024 opinion in Umialik Insurance Co. v. Miftari notes that, in Hillman v. Nationwide Mutual Fire Insurance Co. (1988), the Court held a policy's exclusion of stacking for several vehicles on the same policy valid where the policy was clear in limiting coverage to the highest limit, and that a federal court later concluded the two statutes permit such anti-stacking provisions if the language is not circular. In practice, a clear clause and the statute point the same way.

The 2024 decision cuts the other way on exclusions

In Umialik, the Court held that Alaska law does not authorize excluding UIM coverage for a vehicle not insured under the same policy under which coverage is sought, and that the policy should be reformed to give the minimum coverage the law requires. It also described the statutory priority scheme as one that provides for "stacking" payments where more than one policy applies. So the answer to "does Alaska stack" depends on whether you mean one policy (no) or several (payments in priority order).

What to do with this

List every policy that could cover you, including umbrellas and policies on vehicles you own but did not occupy, and ask each insurer in writing how it counts your claim. Then use the Alaska UM/UIM stacking calculator, and read the plain-English comparison of stacked and unstacked coverage if the terms are new.

This is general information, not legal advice, and the state comparisons above are illustrative, not an exhaustive survey. Confirm how Alaska's rules apply to your specific case with a licensed Alaska attorney.