Santander, Principality and Gen H are increasing prices by up to 25 basis points this week, while NatWest increased some rates this weekend.
Principality Building Society is making the most substantial increases, with product transfers for both residential and buy-to-let borrowers set to jump tomorrow.
The largest increase is due to the five-year transfer of fixed products at a loan-to-value ratio of 75% for home borrowers, which will increase by 25 basis points.
At Santander the increases are less severe; some deals for starters, relocations and product transfers will increase by as much as 7 basis points tomorrow.
Some buy-to-let purchases and remortgages will also rise by 4 basis points.
Gen H will increase rates by 10bp across most categories at 5:30pm today, with some five-year deals expected to rise by 15bp.
NatWest implemented price increases this weekend for new customers and existing customers for extra borrowing rates.
The newly increased products are now live, but the update to brokers did not clarify which specific deals had increased or by how much.
The news comes after interest data from Moneyfacts showed an increase in average interest rates on Friday.