The ISP said that when signing up for either of the broadband packages, purchasers should simply enter the code 'AMAZON' when promoted to receive their free voucher.
BE also said that both packages are available on a nine-month contract, aimed at students that need broadband access while at university.
"BE Broadband is already a fantastic choice for students as it is perfect for a households on a shared network and for those looking for reliable speeds when online," said Oli White, head of marketing at BE Broadband.
"The voucher is an added incentive on top of the nine-month contracts, which ensure students can save money when they are not using their broadband over summer."
Both the BE Pro and BE Unlimited offer speeds of up to 24Mbps, along with a free wireless router and free customer support. Prices start from £17.50 per month. The Amazon voucher offer runs until October 18.