According to the lender, its three-year deal features a rate of 6.05 per cent, while the five and ten-year deals both include one of 5.95 per cent.
Steven Marks, lending and operations executive of Newcastle Building Society, said: "We are delighted to announce the launch of the Society's new mortgage product offering.
"With a plethora of best buy deals available, borrowers have a healthy selection of products to choose from, especially in such difficult market conditions."
NatWest recently announced the launch of a new step down tracker product.
The lender's three-year deal is fee-free and includes a facility which allows borrowers to change to another of the company's fixed rate deals after three months.
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