Should I designate my California appeal as a claim for refund?

On the BOE-305-AH application there is a box to state whether the appeal is intended to constitute a claim for refund. Whether you check it changes your post-decision timeline under Cal. Rev. & Tax. Code §5097.

Here is how §5097 works after the board rules:

• If you do designate the application as a claim for refund, the appeal application itself serves as the refund claim — you preserve the right to file suit for a refund without a separate filing step.
• If you do not designate it, §5097 still lets you file a claim for refund within one year after the appeals board makes its final determination on your application. But if the board's decision notice advises you to file within six months, that shorter clock applies.

Why designate it:

• A claim for refund is the gateway to superior court. California has no administrative appeal of an AAB decision to the state BOE; your only escalation is a refund action in superior court, and you generally must have a valid refund claim on file first (you must file suit within the limitations period after the claim is denied or deemed denied).
• It avoids missing the post-decision window. Homeowners who win a reduction but forget to file a refund claim can lose the money already paid on the higher assessment.

Practical advice: check the claim-for-refund box on the application unless you have a specific reason not to. It costs nothing and protects your downstream rights. The state BOE assessment appeals page and Publication 30 both note the refund-claim election.