Accord Buy to Let is cutting the rates across its 75% LTV range by up to 0.35%.
It is also offering a range of incentives to help landlords manage the upfront costs of buying or remortgaging.
Accord’s two-year fixed rate mortgages are available to landlords with a deposit of 25% at either 3.19% with no product fee, or at 2.84% with a £800 fee.
Those looking to expand their portfolios will receive £500 cashback on completion.
Remortgaging landlords have the choice of free standard legal work and standard valuation, or £300 cashback on completion and free standard valuation.
The intermediary-only lender, part of the Yorkshire Building Society Group, has also launched a two-year tracker mortgage at 1.89% for 60% LTV customers.
This mortgage comes with £500 cashback on completion for house purchases.
For remortgages, it offers a choice of free standard legal work and standard valuation, or £300 cashback on completion and free standard valuation.
Chris Maggs, Accord’s Buy to Let commercial manager, said: “We are constantly reviewing our buy-to-let mortgages to offer the best fit for landlords, and our new 75% LTV range allows those with a 25% deposit to pick and choose the best loan to suit their individual requirements.
“The addition of our new two-year tracker options means we now offer both fixed-rate and tracker buy-to-let mortgages below 2%, which we hope will appeal to both landlords and brokers.”