The US Postal Service will have higher postage rates and shipping rates as of Sunday

The U.S. Postal Service (USPS) will implement new postage rates for most mailing and shipping products on Sunday, January 27, 2019.

For domestic mailing the first class mail letter (1 oz.) rate for postage purchased at the post office will increase by five cents to $0.55 from $0.50. Each additional ounce for a first class mail letter will cost $0.15 (a decrease from $0.21).

"Metered Mail" rates for First Class Mail Letters (1 oz.), which includes online postage providers and postage meters, will increase three cents to $0.50 from $0.47. Each additional ounce will cost $0.15.

The five cent "Metered Mail" rate discount for a first class mail letter (1 oz.) compared to the post office rate represents a savings of 9%.

First class mail flats/large envelopes (1 oz.) rates will not increase and will remain at $1.00. Each additional ounce will cost $0.15.

"Forever" stamps can be purchased for $.50 until Sunday and can be used "forever" without paying the additional price increase.