The 0.84 per cent discount applies until 31 January 2005, and has a current rate 5.15 per cent.
The deal includes a free remortgage transfer service and valuation, and no mortgage administration fee or overhanging redemption penalties.
A £350 arrangement fee can be added on completion.
Martin Ritchley, chief executive of Coventry BS, said: "Buy-to-let is now a substantial market which is seeing a steady increase, particularly in the remortgaging sector.
"For landlords who have conducted their research properly and bought properties in rentable areas, they are still making good returns but we believe this return could be much better by remortgaging.
"The no fee incentives on offer should encourage landlords to think about obtaining a better deal with the Coventry."
