With the price change effective May 31, 2015, the meter price for a single-piece non-presorted First-Class Mail® letter up to one ounce will be $0.485. This meter price is available for any single-piece letters with postage paid by meter, permit imprint, pre-cancelled stamps, Business Reply Mail® (BRM) permit, or PC Postage®, including customized postage. It is available for single-piece mail whether it is mailed at retail (dropped off at a retail counter or dropped into a blue USPS® collection box) or as a residual piece in a commercial mailing.
Customers may bring metered mail to a retail counter to purchase additional services. To accommodate a half-cent price at the retail counter, the following procedures apply:
Scenario 1: The customer affixed the correct price (“First-Class Mail Letter METER Price” from the table below) or overpaid. The retail associate will enter the price without the half-cent (i.e., rounded down) as “Postage Affixed”. This price is listed in the table below as “Adjusted First-Class Mail Letter Price — for systems purpose”.
Scenario 2: The customer affixed a lower price than the “First-Class Mail Letter METER Price” (see table below) and the mailpiece will only be eligible for the stamp price (“First-Class Mail Letter STAMP Price”). Do not process this transaction as “Metered Mail”.
Note: The half-cent difference between stamp and meter pricing is for First-Class Mail letters only; metered First-Class Mail cards and flats continue to have the same price as stamped First-Class Mail cards and flats.
— Mailing Services, New Products and Innovation, 5-28-15