The following information lists USPS rate changes and pricing that takes effect January 21, 2018. 

Changes to First-Class Mail®:

  • First-Class Mail® Letters up to 1 ounce: price increases from $0.49 to $0.50
  • First-Class Mail® Flats up to 1 ounce: price increases from $0.98 to $1.00
  • First-Class Mail® Parcels (Retail): pay one price up to 4 ounces: $3.50, an increase of $0.50.
  • Marketing Mail prices (formerly known as Standard Mail), increase 1.9% on average, as do prices for Bound Printed Matter, Media Mail® and Library Mail.
Select rates for First-Class Mail® Expiring 2017 Prices New Prices 01/21/18
Single-piece Letter – First ounce $0.49 $0.50
Single-piece Metered – First ounce $0.46 $0.47
Single-piece Flat – First ounce $0.98 $1.00
Each additional ounce (letters and flats) $0.21 $0.21
Parcels - Retail $3.00 (up to 4 oz.) $3.50 (up to 4 oz.)
Postcards $0.34 $0.35
Select rates for Other Services    
Certified Mail™* $3.35 $3.45
Media Mail® – 1 lb. Single-Piece $2.63 $2.66
Library Mail – 1 lb. Single-Piece $2.50 $2.53
Return receipt - retail $2.75 $2.75

Priority Mail Express®

Priority Mail Express (PME) rates will increase by an average of 3.9 percent overall when compared to 2017 rates.

Priority Mail prices will see an average rate increase of 3.9 percent overall, with Retail prices increasing by an average of 0.8 percent, Commercial Base increasing 6.2 percent, and Commercial Plus prices increasing 6.1 percent.

PM Flat Rate retail prices will increase as follows:

  • Flat Rate Envelope: $6.65 to $6.70
  • Legal Flat Rate Envelope: $6.95 to $7.00
  • Padded Flat Rate Envelope: $7.20 to $7.25
  • Small Flat Rate Boxes: $7.15 to $7.20
  • Medium Flat Rate Boxes: $13.60 to $13.65
  • Large Flat Rate Boxes: $18.85 to $18.90