Protecting Donald Trump’s immediate family is costing American taxpayers millions and his sons' business travels are quickly racking up the bill.

Mr Trump’s sons Eric and Donald Jr, who run the Trump Organisation, receive Secret Service protection as members of the US President’s immediate family.

The pair arrived in the United Arab Emirates on Saturday for a ceremony to formally open the Trump International Golf Club in Dubai.

It is unclear what additional protections the two sons will receive while in Dubai but experts already have warned the Trump brand abroad now faces a global terror risk and the security bill could reflect that risk.

On Thursday, the Washington Post reported the bill had already surpassed $16,000 (£13,000).

Eric’s visit to Uruguay on a business trip to check on the progress of the Trump Tower in January is said to have cost US taxpayers almost $100,000 (£80,000) to cover his security costs.

Mr Trump said he had stepped back from the management of his business during in term in office and handed it over to his sons and senior executives.

Eric and Donald Jr are expected to continue to travel abroad on business trip for the Trump Organisation and their protection could end up costing millions to US taxpayers.

A giant billboard advertising the Trump International Golf Club hangs at the Dubai Trade Center roundabout, in Dubai. (AP Photo/Kamran Jebreili)

A Trump hotel in Vancouver, Canada, is also expected to soon host the business pair soon.

This comes after estimates from the expenses of the Presidential family in the four first weeks in office suggest the US government may end up spending hundreds of millions of dollars more than it did on the Obama, according to The Washington Post.

In New York, the city is paying $500,000 a day to guard Trump Tower, according to police officials’ estimates, an amount that could reach $183 million a year.

Meanwhile, agents also have to guard multiple homes to protect Mr Trump’s four children and his daughter Ivanka, who moved to a Washington neighbourhood.

Mr Trump’s three weekends in the Florida estate of Mar-a- Lago have also been expensive trips, putting more pressure on the Secret Service.

A veteran agent, who served under the Obamas, Jonathan Wackrow, said the pressure of the task was “monumental” and included manning high-security perimeters in Washington, Florida and New York, and protecting the family members’ business travel.

“It’s a logistical nightmare. Agents are at severe risk of burnout, and the very last thing you want is to have your agents burned out,” he told the Washington Post.

Trump's inner circle: Meet the members of the US president's cabinet Show all 20 1 /20 Trump's inner circle: Meet the members of the US president's cabinet Trump's inner circle: Meet the members of the US president's cabinet Donald Trump's Cabinet Donald Trump's Cabinet is one the richest in American history, filled with billionaires, conservatives and several career politicians. AFP/Getty Trump's inner circle: Meet the members of the US president's cabinet Mike Pence US Vice President Mike Pence has defended Donald Trump throughout his presidency while walking a fine line to avoid any public involvement in major scandals. AFP/Getty Trump's inner circle: Meet the members of the US president's cabinet Mike Pompeo Secretary of State Mike Pompeo replaced Donald Trump's previous appointment to the post, Rex Tillerson, and has led talks with North Korea in establishing high-profile summits between the president and Kim Jong Un. Getty Trump's inner circle: Meet the members of the US president's cabinet Wilbur Ross Secretary of Commerce Wibur Ross raised controversy when he was accused of falsely claiming to have sold stock in a bank and violated a government ethics agreement. AFP/Getty Trump's inner circle: Meet the members of the US president's cabinet Robert Lighthizer US Trade Representative Robert Lighthizer has been a fixture in Donald Trump's ongoing trade spat with China. AFP/Getty Trump's inner circle: Meet the members of the US president's cabinet William Barr Attorney General William Barr replaced Jeff Sessions as the nation's top cop in early 2019 and has refused to commit to recusing himself from the Russia probe despite an unsolicited memo he sent to the Justice Department decrying the investigation. EPA Trump's inner circle: Meet the members of the US president's cabinet Rick Perry Energy Secretary Rick Perry has held his post throughout Donald Trump's presidency despite previously undermining the need for the agency he now leads in past public statements. Ken Shipp / United States Department of Energy Trump's inner circle: Meet the members of the US president's cabinet Betsy DeVos Education Secretary Betsy DeVos has also held her post throughout the presidency, despite major backlash to her apparent undermining of the nationwide public school system and advocacy for charter programmes. Getty Trump's inner circle: Meet the members of the US president's cabinet Steven Mnuchin Treasury Secretary Steven Mnuchin has faced numerous controversies throughout his tenure as the head of Treasury, including costing taxpayers at least a million dollars in travel expenses. AP Trump's inner circle: Meet the members of the US president's cabinet Robert Wilkie Veterans Affairs secretary Robert Wilkie was appointed after Donald Trump's White House doctor Ronny Jackson withdrew over allegations he provided prescription drugs to patients without prescriptions. AFP/Getty Trump's inner circle: Meet the members of the US president's cabinet David Bernhardt Secretary of the Interior David Bernhardt took office in January 2019 after the resignation of Ryan Zinke after previously serving as Zinke's deputy. Before taking office Bernhardt worked for many years as a solicitor for the Department of the Interior. Tami Heilemann / United States Department of the Interior Trump's inner circle: Meet the members of the US president's cabinet Elaine Chao Transportation Secretary Elaine Chao has held her post throughout the presidency and has mostly avoided controversy, despite a report claiming her office has been in frequent coordination with her husband's, Mitch McConnell. AFP/Getty Trump's inner circle: Meet the members of the US president's cabinet Kevin McAleenan Acting Secretary of Homeland Security Kevin McAleenan took over from Kirstjen Nielsen after she resigned in April 2019. He previously worked as the executive director of the executive director of the Office of Anti Terrorism in the Customs and Border Protection agency United States Customs and Border Protection Trump's inner circle: Meet the members of the US president's cabinet Ben Carson Secretary of Housing and Urban Development Ben Carson was appointed shortly after Donald Trump took office and raised controversy over an exorbitant furnishing bill for his office. Reuters Trump's inner circle: Meet the members of the US president's cabinet Gina Haspel CIA Director Gina Haspel was appointed in 2018 and faced backlash surrounding her oversight of Guantanamo Bay. Getty Trump's inner circle: Meet the members of the US president's cabinet Dan Coats Director of National Intelligence Dan Coats could be the next person to leave Donald Trump's administration over his refuting the president's claims surrounding ISIS. Reuters Trump's inner circle: Meet the members of the US president's cabinet Sonny Perdue Agriculture Secretary Sonny Perdue has been dogged by ethics questions throughout his tenure and faced controversy when emails showed the agency appeared willing to eagerly work with lobbyists under his leadership. Reuters Trump's inner circle: Meet the members of the US president's cabinet Alex Azar Health and Human Services Secretary Alex Azar is a former pharmaceutical lobbyist and former drug company executive. Getty Trump's inner circle: Meet the members of the US president's cabinet Mick Mulvaney Acting Chief of Staff and Office of Management and Budget Director Mick Mulvaney has described himself as one of the most conservative officials in the White House. EPA Trump's inner circle: Meet the members of the US president's cabinet Robert Wilkie Secretary of State for Veterans Affairs Robert Wilkie has spent his career on Capitol Hill serving in various roles in foreign affairs and defence. He holds the rank of Lieutenant Colonel in the US Air Force Reserve. Gene Russell / United States Department of Veterans Affairs

Upon arrival in Dubai, the US President’s sons were greeted with a private luncheon with Hussain Sajwani, the billionaire who runs Damac Properties and partnered with Mr Trump on the golf course.

This is the first major event abroad which the pair will attend together since their father's inauguration in January.

The 18-hole golf course is part of a larger project that will include 100 Trump-branded luxury villas in the deserts on the outskirts of Dubai.

Ties between one of the Trump Organisation subsidiaries and Mr Sajwani remain strong and the company received between $1m (£805,700) to $5m (£4m) from Damac for running the golf club, according to a US Federal Election Committee report submitted in May.