The lender has reduced its 2-year fix by 0.20% to 2.50%, which comes with a product fee of £999.
A 2-year fixed rate which has no product fees is now available at 2.65%, following a 0.15% reduction on its previous rate.
An early repayment charge of 2% applies until 30 September 2022 and 1% until 30 September 2023 on both the above products.
For borrowers looking for a longer fix on a fee-assisted products, a 5-year fixed rate at 85% LTV is available at 2.85%, which is a 0.14% reduction on its previous rate.
This product includes tiered early repayment charges (ERCs) which start from 5% in the first year and fall by a percentage point each year
All products in the refreshed range include a free standard valuation and allow 10% overpayments per year.
John Truswell, head of intermediary mortgages at Newcastle Building Society, said: “We’re always reviewing the market to ensure our products remain competitive for clients and borrowers.
“Our latest refresh and improved pricing on our 85% LTV mortgages ensures that we continue to offer great value products to Intermediaries and their customers.”