Determine if You're Eligible: All active duty members, National Guard and reserve personnel, retired military, as well as honorably discharged veterans and their immediate family members are eligible. Customers requesting the discount will need to show a valid military ID, dependent's ID or some other proof of service.
Plan to Shop on Certain Holidays: Both Lowes and Home Depot offer the discount on Memorial Day weekend (May), July 4th, and Labor Day weekend (September). Typically the discount is active throughout the whole holiday weekend. See the "Tips" below for updates on specific dates.
Once at the Store: Gather the items you'd like to purchase and take them to any register. Ask for the discount and show your military ID. Most cashiers will be able to apply the discount immediately, but sometimes a manager might need to assist.
Know the Limits: Lowes usually offers the discount on a purchase up to $5000, for a $500 savings. Home Depot caps the offer at $2000, for a $200 discount.