how much is a first class stamp uk

In January 2026, a standard UK first class stamp for a letter up to 100g costs about £1.70.

Current first class stamp price

• Standard 1st Class letter (up to 100g, normal envelope size): about £1.70.

• 1st Class Large Letter (up to 100g): around £3.15.

Royal Mail prices have risen several times in recent years, so it is always wise to double‑check on the Royal Mail or Post Office website right before you buy, especially if you are reading this later in 2026.

Quick Scoop: why it keeps changing

• Letter volumes have dropped sharply over the last couple of decades, which pushes up the cost per letter to deliver.

• Royal Mail still has to deliver to every UK address six days a week, which they cite as a reason for price hikes.

If you post a lot of letters, looking at franking or Mailmark rates can shave a few pence off each item, especially for businesses.

Information gathered from public forums or data available on the internet and portrayed here.