The new USPS rates take effect on January 26, 2020. Below are the rate changes on the most popular services.

First Class Mailing Service Price Changes

Product
Current - 2019
New Rate - January 26, 2020
Letters (1 oz.) $0.55 $0.55
Letters additional ounces $0.15 $0.15
Letters (metered 1 oz.) $0.50 $0.50
Outbound International Letters (1 oz.) $1.15 $1.15
Domestic Postcards $0.35 $0.35

Priority Mail Retail Price Changes

Product
Current - 2019
New Rate - January 26, 2020
Small Flat Rate Box $7.90 $8.30
Medium Flat Rate Box $14.35 $15.05
Large Flat Rate Box $19.95 $21.10
APO/FPO Large Flat Rate Box $18.45 $19.60
Regular Flat Rate Envelope $7.35 $7.75
Legal Flat Rate Envelope $7.65 $8.05
Padded Flat Rate Envelope $8.00 $8.40