The long haul specialist will beat mainstream rival Thomson – which plans to launch a similar function in September – when it starts publishing the most recent five reviews for every accommodation it serves from August.
Hayes & Jarvis said it would not filter any negative reviews posted against its properties.
The company currently has an average rating of four out of five across its portfolio.
TripAdvisor brand distribution director, Nathan Clapton, said: “Real holidaymaker reviews and opinions provide invaluable research for consumers making travel choices and we are committed to making this information available where customers are booking their holidays.”
A recent survey by Jupiter Research found that 23% of holidaymakers visit TripAdvisor before booking a travel product.
Clare Tobin, managing director at Hayes & Jarvis, added: “This is a tremendous initiative for Hayes & Jarvis and very much the shape of things to come.
“By making the TripAdvisor reviews available on our website, potential customers are provided with an invaluable independent assessment of the hotel that they are considering.”