MA H5036

Requires automobile manufacturers to display a "tariff cost estimate" label on new vehicles showing the price increase attributable to federal tariffs, either on or adjacent to the existing Monroney window sticker

Creates new Chapter 93M requiring retail establishments with $500,000+ in annual revenue to disclose the tariff portion of product prices on shelf tags, online product pages, and receipts (as a dollar amount or percentage)

Products with tariff costs under 2% of price or less than $0.50 may use a "de minimis" disclosure instead of exact figures

Violations constitute unfair or deceptive practices under Chapter 93A, with penalties up to $1,000 per vehicle for auto dealers and $500 per item for retailers

Declared an emergency law taking effect 60 days after passage; Attorney General will promulgate regulations for calculating tariff estimates and recordkeeping requirements