The changed rates come into effect on Wednesday 16 October.
The Mortgage Works (TMW) is reducing its 5-year fixed rate mortgages by up to 0.35% and 2-year fixed rates by up to 0.25%.
The 5-year fixed rate product up to 75% LTV is now 2014% with the product up to 80% LTV down to 3.59%.
The up to 75% LTV offering comes with a £1,995 fee, free valuation and £250 cashback.
The 80% LTV product comes with a £995 fee, free valuation and £250 cashback.
For those with a large portfolio, rates for the 5-year fixed rate mortgage start at 3.29% up to 75% LTV and 2-year fixed rates start at 2.59%.
Both products come with a £1,995 fee.
For limited company mortgages, rates for the 5-year fixed rate products up to 75% LTV start at 3.34% and come with free valuation.
Henry Jordan, director of mortgages at TMW, said: “In the current economic climate many landlords are looking for payment security to manage their cashflow.
"These selected reductions across our five-year fixed rate buy to let mortgage range enhances choices for landlords who want to secure their repayments over the medium term.”
