It offers a rate of 5.99% fixed for two years with loan to values from 85% to 90% and a £499 product fee and cash back on completion equivalent to 0.50% of the purchase price for purchases between £125,001 and £250,000.
It follows the launch of a similar cash back product the lender launched in its branches last Wednesday designed to help ease the end of the stamp duty holiday for first-time buyers.
A spokeswoman for Halifax said the decision to limit the deal to Countrywide brokers reflected Countrywide’s “early interest” in the direct deal.
She said: “We've worked with Countrywide to bring this product to market as they expressed an early interest.
“We're always looking for ways to support home movers and first-time buyers and national accounts so we wouldn't rule out developing similar propositions in the future.”
She added that Halifax was keen to offer innovative solutions for first-time buyers.
She said: “With the end of the stamp duty exemption, we've developed this deal to help soften the blow of the stamp duty bill for those buying their first home.”