Principality Building Society will increase rates by up to 15 basis points tomorrow.
Meanwhile, both Rely and Vida are pulling buy-to-let products to review prices.
Yesterday, Halifax and BM Solutions cut rates by up to 25 basis points.
At Principality, the biggest increases have been seen in some buy-to-let and holiday rental deals.
In the buy-to-let range, five-year fixed rates with an LTV of 60% will increase by up to 15 basis points, while five-year rates with an LTV of 70 and 75% will increase by up to 10 basis points.
For vacation rental owners, two-year fixed rates with a 60% LTV will increase by 15 basis points without fees, and some other products will increase by lower amounts.
For retail borrowers, cashback deals with an LTV of 80% and 90% will increase by up to 12 basis points.
Residential products at many other levels will also see increases of up to 10 basis points, including some new construction agreements and sole proprietorship agreements by joint borrowers.
Rely will withdraw all tariffs at 5pm this afternoon and say it will relaunch with lower prices.
Vida withdrew all new company products for rental at the close of trading yesterday, with a few hours’ notice for the agents, and will relaunch the deals on Friday.
However, it is not said whether prices will rise or fall.