NatWest has lifted rates for new business and existing customers by up to 44 basis points.

The biggest increases come within the lender’s buy-to-let and residential products for existing customers.

For existing customers, a two-year BTL fixed-rate switcher at 60% LTV, increases by 40bps from 3.14% to 3.54%, with no fee.

A two-year BTL fixed-rate switcher at 75% LTV, increases by 36bps from 2.91% to 3.27%, with a £995 product fee.

A five-year BTL fixed-rate switcher at 60% LTV, increases by 44bps from 3.15% to 3.59%, with no fee.

A five-year BTL fixed-rate switcher at 75% LTV, increases by 35bps from 3.02% to 3.37%, with a £995 fee.

A two-year fixed-rate residential switcher at 60% LTV, increases by 36bps from 3.14% to 3.50%, with no fee.

A two-year fixed-rate residential switcher at 85% LTV, increases by 31bps from 2.94% to 3.25%, with a £995 fee.

A five-year fixed-rate residential switcher at 60% LTV, increases by 36bps from 3.15% to 3.51%, with no fee.

And a five-year fixed-rate residential switcher at 90% LTV, increases by 28bps from 3.19% to 3.47%, with a £995 fee.

For new customers, a two-year fixed-rate residential purchase at 90% LTV, increases by 10bps from 3.31% to 3.41%, with a £995 fee.

A five-year fixed-rate remortgage at 60% LTV, increases by 6bps from 3.50% to 3.56%, with no product fee.

A two-year fixed-rate purchase at 85% LTV, increases by 10bps from 3.39% to 3.49%, with a £995 fee and £1,000 cashback.

A five-year shared equity residential fixed-rate purchase at 60% LTV, increases by 10bps from 3.46% to 3.56%, with a £995 fee and £250 cashback.

A two-year mortgage guarantee residential fixed-rate purchase at 95% LTV, increases by 10bps from 3.87% to 3.97%, with no product fee and a cashback of £750

And a two-year BTL fixed-rate purchase at 75% LTV, increases by 10bps from 3.33% to 3.43%, with a £995 fee.

The lender says there are no changes to term end dates.

The high street bank has also announced that it has extended its product transfer roll-off window from four months to six months with immediate effect.

It says this move includes its Metro to NatWest customers whose porting roll-off window also now aligns to six calendar months.

NatWest national account manager Luke Christodoulides says: “We’ve made great strides this year to improve our product transfer proposition, so that we have a streamlined process that enables our broker’s customers to switch easily.

“In the current climate of increasing interest rates and uncertainty around the cost of living we are pleased to be able to support our customers, to enable them to secure their new mortgage rate far earlier”