Repair-shop disputes generally come down to the same things: the written estimate, what was actually authorized, and the final invoice. Organize those facts and get a free letter outline; the full demand letter is in the $39 Case Pack.
| Estimate required | always |
|---|---|
| Threshold | Not specified |
| Authorization to exceed estimate | written_or_oral |
| Cap on overage | 10% |
| Citation | Haw. Rev. Stat. Section 437B-15 |
Source: Haw. Rev. Stat. Section 437B-15
A Hawaii motor vehicle repair dealer, mechanic, or apprentice must give the customer a written estimate before starting a specific job, unless the customer waives this in writing. The overage cap is TIERED and unusual: no more than 15% over the estimate if the estimate was under $100, or 10% over if the estimate was $100 or more, without the customer's prior written or oral consent given after the shop learns the estimate is insufficient and before the extra work is done. This overage-consent requirement can itself be separately waived in writing, but only if the shop first makes reasonable efforts to contact the customer. All work, including warranty work, must be documented on an invoice.
Wherewithal is an organizational tool only. Not legal advice. Consider consulting a licensed attorney.