The site, www.btlexperts.co.uk, has sections on landlord obligations, regulation, income and tax implications, letting agent services and charges and rental calculators.
It also provides information on tenancy agreements, deposit protection schemes, landlord insurance and ending a tenancy.
In addition, from July, BM Solutions will provide brokers with buy-to-let guides to give to clients looking for more information on the market.
Phil Rickards, head of sales at BM Solutions, said: “As a major player in the market, we have a duty to do what we can to help intermediaries support their landlord clients, especially those taking their first steps in the market.
“The new website and guide will help landlords do their homework on the market and their responsibilities, and explains crucial information in a simple and straightforward way.”