NatWest will be offering new buy-to-let deals from March 31.
Included are two two-year fixed rates available online only with 85% LTVs and a 20% rate increase.
Also changed are a series of tracker deals including a pair of two-year deals at 85% LTV.
Rates on these have risen by 21% and 25% putting the deals at 1.0% above base rate and 1.14% above base rate respectively.
Two 85% lifetime trackers have also changed with rates increasing by 25%. A lifetime tracker remortgage rates has also been increased by 25%
All tracker deals have had arrangement fees set at £999.