USPS First-Class Forever Stamps & Mailing Services Will Increase Starting Sunday, January 27, 2019

USPS First-Class Forever Stamps & Mailing Services Will Increase Starting Sunday, January 27
Starting January 27, 2019, a price increase on USPS First-Class Forever Mail Stamps is coming.
The increase from 50¢ per stamp to 55¢ per stamp amounts to an extra $1 cost per book of stamps. This is the largest percentage rise since 1991 when postage increased from 25¢ to 29¢.
However, the cost to mail a domestic postcard will remain the same at 35¢ each.
Also, select USPS mailing services will be increasing.
https://about.usps.com/news/national-releases/2018/pr18_086.htm