In what it claims is an industry first, HRG has decided to absorb the new GDS opt-in charges.
It put the travel management company out of step with its two major UK rival American Express and Carlson Wagonlit Travel (CWT) which have both announced they will pass the charges on to clients.
HRG said that is decision follows "clarification" of BA's latest contract negotiations with Galileo and Sabre.
The deal which the airline signed with these two GDSs as well as Worldspan make them BA's "preferred channels" for booking their flights.
But BA is levying a 50p surcharge on first, business and economy class bookings and £1 on bookings for its cheaper flights.
The agreements came into force on April 10.
Mike Platt, HRG's industry affairs director, said: "In recent years HRG has played a crucial role in working with the airlines and GDS suppliers to anticipate change and ensure that we have the most efficient and widest access to fares and ticketing alternatives for the benefit of our clients.
"We are also committed to maximising our clients' expenditure and creating added value whilst doing all we can to avoid passing on added cost as a result of industry developments.
"We therefore felt it appropriate to await further clarification from BA before setting out our position and I am pleased that we have now been able to avoid further charges for our clients.
"We will continue to monitor the situation to see how it develops in the future and will undertake a review of our position in 12 months' time."
Andrew Waller, CWT's executive vp for the UK said when announcing his company's decision that the surcharge imposed by BA was directly associated with the cost of accessing a BA ticket and in effect therefore simply an increase in the BA ticket price for tickets booked via a GDS, impacting both corporations and travellers.
"As such, CWT's policy is passing onto clients all GDS opt in fees as incurred, at time of ticket issue in a transparent process."
In its statement, Amex said: "However, the new programmes' modified pricing schemes change the requirements for and costs we incur when making BA reservations (from the UK and Ireland) for clients.
"To allow for the new GDS programmes and continue uninterrupted BA content access, from 1st May 2007, all BA bookings will incur an additional charge of £0.50 / £1 per segment (dependent on fare class)."
Amadeus is the only major GDS not to have signed a deal with BA although talks are continuing.
In the meantime, Amadeus said it will absorb the £3 levy for bookings not made through preferred channels until May 1 when the GDS will review the situation.
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