The agency group calculates an agency would need to sell seven extra holidays to fund the salary, national insurance and pension contributions increase of that employee.
It based calculations on a £3,000 holiday and the commission seven extra sales would generate. However, it stressed it was not against the increase in minimum wage levels, which come into force on 6 April.
TTNG chief executive Gary Lewis urged members to examine whether there were savings to be made in renegotiating utilities including water, gas and electricity to offset the increased costs.
He also urged agents to maximise their biggest asset, relationships with their customers.
He said: “In times like these – where wage costs are on the rise – those relationships become even more crucial.
“By combining expert knowledge with genuine care, our members can maintain profitability while still delivering the personal touch their customers value.
“This personalised approach leads to repeat bookings and referrals, both of which are essential for staying profitable amid higher staffing expenses.”
TTNG is not the first agency group to voice concern about increased costs to employers from April; Advantage Travel Partnership estimated these at around £900 per person on an average wage.
Chief executive Julia Lo Bue-Said warned this “will be the difference between turning a profit or not for a lot of businesses”.